From 9971d888b32a8f73c98f56889ac788b93a8763c7 Mon Sep 17 00:00:00 2001
From: Per Lundberg <perlun@gmail.com>
Date: Sat, 29 Apr 2017 15:41:50 +0300
Subject: [PATCH] Changed default from ES3 to ES5

Fixes #10117

The fix was easy, but then I had to get the tests passing:

```shell
$ gulp runtests # loads of failures, more than 1000 actually.
$ gulp baseline-accept
$ gulp runtests # to make sure they now passed
```

...and then `git add .` to add all the changes. (There were a bunch of new files created when I did it like this; is that correct?)

----

(Regarding the unrelated changes in `compileOnSave.ts`: I happened to see a few typing mistakes there very close to the changes I were making to that files, so I bundled that change along at the same time. Since the tests are passing I think it should be fine.)
---
 src/compiler/core.ts                          |   2 +-
 src/harness/unittests/compileOnSave.ts        |   8 +-
 .../baselines/reference/APISample_compile.js  |   2 +-
 tests/baselines/reference/APISample_linter.js |   2 +-
 .../reference/APISample_parseConfig.js        |   2 +-
 .../reference/APISample_transform.js          |   2 +-
 .../baselines/reference/APISample_watcher.js  |   2 +-
 .../reference/ES3For-ofTypeCheck1.errors.txt  |   7 -
 .../reference/ES3For-ofTypeCheck1.symbols     |   4 +
 .../reference/ES3For-ofTypeCheck1.types       |   5 +
 .../reference/ES3For-ofTypeCheck4.errors.txt  |   8 -
 .../reference/ES3For-ofTypeCheck4.symbols     |   8 +
 .../reference/ES3For-ofTypeCheck4.types       |   8 +
 tests/baselines/reference/ES5For-of33.js      |   2 +-
 .../reference/ES5For-of33.sourcemap.txt       |   2 +-
 tests/baselines/reference/ES5For-of34.js      |   2 +-
 .../reference/ES5For-of34.sourcemap.txt       |   2 +-
 tests/baselines/reference/ES5For-of35.js      |   2 +-
 .../reference/ES5For-of35.sourcemap.txt       |   2 +-
 tests/baselines/reference/ES5For-of36.js      |   2 +-
 .../reference/ES5For-of36.sourcemap.txt       |   2 +-
 .../MemberAccessorDeclaration15.errors.txt    |   5 +-
 ...eEachWithExportedLocalVarsOfTheSameName.js |   4 +-
 .../reference/accessorWithES3.errors.txt      |  35 --
 .../reference/accessorWithES3.symbols         |  36 ++
 .../baselines/reference/accessorWithES3.types |  40 ++
 ...ccessorsAreNotContextuallyTyped.errors.txt |  22 -
 .../accessorsAreNotContextuallyTyped.symbols  |  30 ++
 .../accessorsAreNotContextuallyTyped.types    |  34 ++
 .../reference/accessorsEmit.errors.txt        |  24 -
 .../baselines/reference/accessorsEmit.symbols |  30 ++
 tests/baselines/reference/accessorsEmit.types |  34 ++
 .../accessorsNotAllowedInES3.errors.txt       |  14 -
 .../accessorsNotAllowedInES3.symbols          |  11 +
 .../reference/accessorsNotAllowedInES3.types  |  14 +
 ...rs_spec_section-4.5_error-cases.errors.txt |  26 +-
 ...sors_spec_section-4.5_inference.errors.txt |  63 ---
 ...cessors_spec_section-4.5_inference.symbols |  64 +++
 ...accessors_spec_section-4.5_inference.types |  70 +++
 tests/baselines/reference/aliasAssignments.js |   4 +-
 .../reference/aliasOnMergedModuleInterface.js |   2 +-
 .../baselines/reference/aliasUsageInArray.js  |   6 +-
 .../aliasUsageInFunctionExpression.js         |   6 +-
 .../reference/aliasUsageInGenericFunction.js  |   6 +-
 .../reference/aliasUsageInIndexerOfClass.js   |   6 +-
 .../reference/aliasUsageInObjectLiteral.js    |   6 +-
 .../reference/aliasUsageInOrExpression.js     |   6 +-
 ...aliasUsageInTypeArgumentOfExtendsClause.js |   6 +-
 .../reference/aliasUsageInVarAssignment.js    |   6 +-
 .../reference/aliasUsedAsNameValue.js         |   6 +-
 ...aceExportAssignmentUsedInVarInitializer.js |   4 +-
 .../allowSyntheticDefaultImports1.js          |   6 +-
 .../allowSyntheticDefaultImports10.js         |   6 +-
 .../allowSyntheticDefaultImports2.js          |   2 +-
 .../allowSyntheticDefaultImports3.js          |   2 +-
 .../allowSyntheticDefaultImports4.js          |   4 +-
 .../allowSyntheticDefaultImports5.js          |   2 +-
 .../allowSyntheticDefaultImports6.js          |   2 +-
 .../allowSyntheticDefaultImports7.js          |   4 +-
 .../allowSyntheticDefaultImports8.js          |   4 +-
 .../allowSyntheticDefaultImports9.js          |   6 +-
 .../reference/alwaysStrictModule4.js          |   2 +-
 .../reference/ambientDeclarationsExternal.js  |   2 +-
 .../reference/ambientDeclarationsPatterns.js  |   4 +-
 ...nalModuleInsideNonAmbientExternalModule.js |   2 +-
 .../reference/ambientExternalModuleMerging.js |   2 +-
 ...rnalModuleWithInternalImportDeclaration.js |   2 +-
 ...lModuleWithoutInternalImportDeclaration.js |   2 +-
 .../ambientInsideNonAmbientExternalModule.js  |   2 +-
 .../reference/ambientNameRestrictions.js      |   2 +-
 tests/baselines/reference/ambientShorthand.js |   4 +-
 .../reference/ambientShorthand_duplicate.js   |   2 +-
 .../reference/ambientShorthand_merging.js     |   2 +-
 .../reference/ambientShorthand_reExport.js    |   6 +-
 .../reference/amdDependencyComment1.js        |   2 +-
 .../reference/amdDependencyComment2.js        |   2 +-
 .../reference/amdDependencyCommentName1.js    |   2 +-
 .../reference/amdDependencyCommentName2.js    |   2 +-
 .../reference/amdDependencyCommentName3.js    |   2 +-
 .../reference/amdDependencyCommentName4.js    |   4 +-
 .../reference/amdImportAsPrimaryExpression.js |   4 +-
 .../amdImportNotAsPrimaryExpression.js        |   4 +-
 .../reference/anyIdenticalToItself.errors.txt |   8 +-
 tests/baselines/reference/asOperator4.js      |   4 +-
 .../reference/assignmentCompatBug3.errors.txt |  37 --
 .../reference/assignmentCompatBug3.symbols    |  61 +++
 .../reference/assignmentCompatBug3.types      |  72 +++
 .../reference/augmentExportEquals1.js         |   4 +-
 .../reference/augmentExportEquals1_1.js       |   4 +-
 .../reference/augmentExportEquals2.js         |   4 +-
 .../reference/augmentExportEquals2_1.js       |   4 +-
 .../reference/augmentExportEquals3.js         |   4 +-
 .../reference/augmentExportEquals3_1.js       |   4 +-
 .../reference/augmentExportEquals4.js         |   4 +-
 .../reference/augmentExportEquals4_1.js       |   4 +-
 .../reference/augmentExportEquals5.js         |   4 +-
 .../reference/augmentExportEquals6.js         |   4 +-
 .../reference/augmentExportEquals6_1.js       |   4 +-
 .../augmentedTypesExternalModule1.js          |   2 +-
 .../reference/badExternalModuleReference.js   |   2 +-
 tests/baselines/reference/bangInModuleName.js |   2 +-
 .../reference/baseConstraintOfDecorator.js    |   2 +-
 .../baselines/reference/bluebirdStaticThis.js |   8 +-
 tests/baselines/reference/cacheResolutions.js |   6 +-
 .../reference/cachedModuleResolution1.js      |   4 +-
 .../reference/cachedModuleResolution2.js      |   4 +-
 .../reference/cachedModuleResolution3.js      |   4 +-
 .../reference/cachedModuleResolution4.js      |   4 +-
 .../reference/cachedModuleResolution5.js      |   4 +-
 .../reference/cachedModuleResolution6.js      |   4 +-
 .../reference/cachedModuleResolution7.js      |   4 +-
 .../reference/cachedModuleResolution8.js      |   4 +-
 .../reference/cachedModuleResolution9.js      |   4 +-
 .../baselines/reference/chainedImportAlias.js |   4 +-
 .../reference/checkJsxChildrenProperty1.js    |   2 +-
 .../reference/checkJsxChildrenProperty12.js   |   2 +-
 .../reference/checkJsxChildrenProperty13.js   |   2 +-
 .../reference/checkJsxChildrenProperty2.js    |   2 +-
 .../reference/checkJsxChildrenProperty3.js    |   2 +-
 .../reference/checkJsxChildrenProperty4.js    |   2 +-
 .../reference/checkJsxChildrenProperty5.js    |   2 +-
 .../reference/checkJsxChildrenProperty6.js    |   2 +-
 .../reference/checkJsxChildrenProperty7.js    |   2 +-
 .../reference/checkJsxChildrenProperty8.js    |   2 +-
 .../reference/checkJsxChildrenProperty9.js    |   2 +-
 .../baselines/reference/circularReference.js  |   4 +-
 .../reference/circularReferenceInImport.js    |   2 +-
 .../reference/classAbstractManyKeywords.js    |   4 +-
 ...classMemberInitializerWithLamdaScoping3.js |   2 +-
 ...classMemberInitializerWithLamdaScoping4.js |   4 +-
 .../reference/classMethodWithKeywordName1.js  |   2 +-
 .../classPropertyAsPrivate.errors.txt         |  14 +-
 .../classPropertyAsProtected.errors.txt       |  14 +-
 .../classPropertyIsPublicByDefault.errors.txt |  37 --
 .../classPropertyIsPublicByDefault.symbols    |  75 +++
 .../classPropertyIsPublicByDefault.types      |  84 +++
 .../classWithStaticMembers.errors.txt         |  28 -
 .../reference/classWithStaticMembers.symbols  |  67 +++
 .../reference/classWithStaticMembers.types    |  70 +++
 .../cloduleWithDuplicateMember1.errors.txt    |   8 +-
 .../cloduleWithDuplicateMember2.errors.txt    |   8 +-
 ...deGenModuleWithAccessorChildren.errors.txt |  63 ---
 ...nCodeGenModuleWithAccessorChildren.symbols | 105 ++++
 ...ionCodeGenModuleWithAccessorChildren.types | 111 ++++
 .../collisionExportsRequireAndAlias.js        |   6 +-
 .../collisionExportsRequireAndAmbientClass.js |   2 +-
 .../collisionExportsRequireAndAmbientEnum.js  |   2 +-
 ...llisionExportsRequireAndAmbientFunction.js |   2 +-
 ...collisionExportsRequireAndAmbientModule.js |   2 +-
 .../collisionExportsRequireAndAmbientVar.js   |   2 +-
 .../collisionExportsRequireAndClass.js        |   2 +-
 .../collisionExportsRequireAndEnum.js         |   2 +-
 .../collisionExportsRequireAndFunction.js     |   2 +-
 ...ionExportsRequireAndInternalModuleAlias.js |   2 +-
 .../collisionExportsRequireAndModule.js       |   2 +-
 ...onExportsRequireAndUninstantiatedModule.js |   2 +-
 .../collisionExportsRequireAndVar.js          |   2 +-
 ...uperAndLocalFunctionInAccessors.errors.txt |  20 +-
 ...sionSuperAndLocalVarInAccessors.errors.txt |  20 +-
 .../collisionSuperAndParameter.errors.txt     |   8 +-
 ...xpressionAndLocalVarInAccessors.errors.txt |  14 +-
 .../commentOnClassAccessor1.errors.txt        |  12 -
 .../reference/commentOnClassAccessor1.symbols |  10 +
 .../reference/commentOnClassAccessor1.types   |  11 +
 .../commentOnClassAccessor2.errors.txt        |  20 -
 .../reference/commentOnClassAccessor2.symbols |  17 +
 .../reference/commentOnClassAccessor2.types   |  18 +
 .../commentOnExportEnumDeclaration.js         |   2 +-
 .../reference/commentOnImportStatement1.js    |   2 +-
 .../reference/commentOnImportStatement2.js    |   2 +-
 .../reference/commentOnImportStatement3.js    |   2 +-
 .../commentsBeforeVariableStatement1.js       |   2 +-
 .../commonJSImportAsPrimaryExpression.js      |   4 +-
 .../commonJSImportNotAsPrimaryExpression.js   |   4 +-
 tests/baselines/reference/commonSourceDir5.js |   6 +-
 tests/baselines/reference/commonSourceDir6.js |   6 +-
 .../reference/commonSourceDirectory.js        |   2 +-
 .../commonSourceDirectory.sourcemap.txt       |   2 +-
 .../reference/commonSourceDirectory_dts.js    |   2 +-
 .../commonSourceDirectory_dts.sourcemap.txt   |   2 +-
 .../reference/complexNarrowingWithAny.js      |   2 +-
 .../computedPropertyNames49_ES5.errors.txt    |  18 +-
 .../computedPropertyNames50_ES5.errors.txt    |  18 +-
 .../reference/constEnumExternalModule.js      |   4 +-
 ...constructorWithIncompleteTypeAnnotation.js |  10 +-
 .../contextualTypingOfAccessors.errors.txt    |  22 -
 .../contextualTypingOfAccessors.symbols       |  27 +
 .../contextualTypingOfAccessors.types         |  30 ++
 ...llyTypedStringLiteralsInJsxAttributes02.js |   2 +-
 .../controlFlowBinaryOrExpression.js          |   2 +-
 .../controlFlowPropertyDeclarations.js        |   2 +-
 .../controlFlowSelfReferentialLoop.js         |   4 +-
 .../baselines/reference/convertKeywordsYes.js | 144 ++---
 .../reference/copyrightWithNewLine1.js        |   2 +-
 .../reference/copyrightWithoutNewLine1.js     |   2 +-
 .../crashIntypeCheckInvocationExpression.js   |   2 +-
 ...rashIntypeCheckObjectCreationExpression.js |   2 +-
 .../declFileAliasUseBeforeDeclaration.js      |   4 +-
 ...tExternalModuleWithSingleExportedModule.js |   2 +-
 ...assWithStaticMethodReturningConstructor.js |   2 +-
 ...lFileExportAssignmentOfGenericInterface.js |   4 +-
 .../reference/declFileExportImportChain.js    |   6 +-
 .../reference/declFileExportImportChain2.js   |   4 +-
 .../reference/declFileForExportedImport.js    |   4 +-
 .../reference/declFileGenericType.js          |   2 +-
 ...eclFileImportModuleWithExportAssignment.js |   2 +-
 .../declarationEmitExpressionInExtends3.js    |   2 +-
 .../declarationEmitIdentifierPredicates01.js  |   2 +-
 ...itIdentifierPredicatesWithPrivateName01.js |   2 +-
 .../declarationEmitIndexTypeNotFound.js       |   2 +-
 ...declarationEmitInferedDefaultExportType.js |   4 +-
 .../declarationEmitInferedTypeAlias1.js       |   4 +-
 .../declarationEmitInferedTypeAlias2.js       |   4 +-
 .../declarationEmitInferedTypeAlias3.js       |   6 +-
 .../declarationEmitInferedTypeAlias5.js       |   4 +-
 .../declarationEmitInferedTypeAlias6.js       |   4 +-
 .../declarationEmitInferedTypeAlias7.js       |   4 +-
 .../declarationEmitInferedTypeAlias9.js       |   2 +-
 .../reference/declarationEmitInvalidExport.js |   2 +-
 .../reference/declarationEmitNameConflicts.js |   2 +-
 .../declarationEmitNameConflictsWithAlias.js  |   2 +-
 .../declarationEmitThisPredicates01.js        |   2 +-
 .../declarationEmitThisPredicates02.js        |   2 +-
 ...tionEmitThisPredicatesWithPrivateName01.js |   2 +-
 ...tionEmitThisPredicatesWithPrivateName02.js |   2 +-
 ...arationEmitTypeAliasWithTypeParameters1.js |   2 +-
 ...arationEmitTypeAliasWithTypeParameters2.js |   2 +-
 ...arationEmitTypeAliasWithTypeParameters5.js |   2 +-
 .../reference/declarationMerging2.js          |   4 +-
 .../reference/decoratorOnImportEquals2.js     |   4 +-
 .../decoratorWithUnderscoreMethod.js          |   2 +-
 .../reference/dependencyViaImportAlias.js     |   2 +-
 ...ctionOverridesBaseClassAccessor.errors.txt |   8 +-
 ...edClassIncludesInheritedMembers.errors.txt |  55 --
 ...rivedClassIncludesInheritedMembers.symbols | 120 +++++
 ...derivedClassIncludesInheritedMembers.types | 134 +++++
 ...ivedClassOverridesPublicMembers.errors.txt |  89 ----
 ...derivedClassOverridesPublicMembers.symbols | 227 ++++++++
 .../derivedClassOverridesPublicMembers.types  | 237 +++++++++
 .../reference/derivedClassWithAny.errors.txt  |  20 +-
 ...InstanceShadowingPublicInstance.errors.txt |  14 +-
 ...vateStaticShadowingPublicStatic.errors.txt |  14 +-
 .../derivedGenericClassWithAny.errors.txt     |  14 +-
 .../destructuringParameterDeclaration6.js     |   8 +-
 .../duplicateClassElements.errors.txt         |  32 +-
 .../reference/duplicateLocalVariable1.js      |   2 +-
 .../reference/duplicateLocalVariable2.js      |   2 +-
 .../duplicateStringNamedProperty1.js          |   2 +-
 .../duplicateSymbolsExportMatching.js         |   2 +-
 .../reference/dynamicModuleTypecheckError.js  |   2 +-
 .../baselines/reference/elidingImportNames.js |   6 +-
 tests/baselines/reference/emptyModuleName.js  |   2 +-
 .../reference/enumFromExternalModule.js       |   4 +-
 .../errorSuperPropertyAccess.errors.txt       |  26 +-
 .../errorsInGenericTypeReference.errors.txt   |   5 +-
 ...es3-oldStyleOctalLiteralInEnums.errors.txt |   8 +-
 .../es3-oldStyleOctalLiteralTypes.errors.txt  |   8 +-
 .../reference/es3defaultAliasIsQuoted.js      |   8 +-
 .../reference/es6ClassTest2.errors.txt        |   8 +-
 tests/baselines/reference/es6ClassTest5.js    |   2 +-
 .../reference/es6ExportEqualsInterop.js       |   2 +-
 ...efaultBindingFollowedWithNamedImportDts.js |   4 +-
 ...tBindingFollowedWithNamespaceBindingDts.js |   4 +-
 ...gFollowedWithNamespaceBindingWithExport.js |   4 +-
 ...s6ImportDefaultBindingNoDefaultProperty.js |   4 +-
 .../reference/es6ImportNameSpaceImportAmd.js  |   4 +-
 .../reference/es6ImportNameSpaceImportDts.js  |   4 +-
 .../es6ImportNameSpaceImportWithExport.js     |   4 +-
 .../reference/es6ImportNamedImportAmd.js      |   4 +-
 .../reference/es6ImportNamedImportDts.js      |   4 +-
 ...rtNamedImportInIndirectExportAssignment.js |   2 +-
 .../es6ImportNamedImportMergeErrors.js        |   4 +-
 .../es6ImportNamedImportNoExportMember.js     |   4 +-
 .../es6ImportNamedImportWithExport.js         |   4 +-
 .../es6ImportNamedImportWithTypesAndValues.js |   4 +-
 .../es6ImportWithoutFromClauseAmd.js          |   6 +-
 .../es6ImportWithoutFromClauseWithExport.js   |   4 +-
 .../reference/exportAndImport-es3-amd.js      |  10 +-
 .../reference/exportAndImport-es3.js          |  10 +-
 .../reference/exportArrayBindingPattern.js    |   2 +-
 .../reference/exportAssignClassAndModule.js   |   2 +-
 .../reference/exportAssignDottedName.js       |   2 +-
 .../exportAssignImportedIdentifier.js         |   4 +-
 .../baselines/reference/exportAssignTypes.js  |   2 +-
 .../exportAssignedTypeAsTypeAnnotation.js     |   4 +-
 .../reference/exportAssignmentClass.js        |   2 +-
 .../exportAssignmentConstrainedGenericType.js |   2 +-
 .../reference/exportAssignmentEnum.js         |   2 +-
 .../reference/exportAssignmentFunction.js     |   2 +-
 .../reference/exportAssignmentGenericType.js  |   2 +-
 .../reference/exportAssignmentInterface.js    |   4 +-
 .../exportAssignmentInternalModule.js         |   2 +-
 .../exportAssignmentMergedInterface.js        |   4 +-
 .../reference/exportAssignmentMergedModule.js |   2 +-
 ...xportAssignmentOfDeclaredExternalModule.js |   4 +-
 .../exportAssignmentOfGenericType1.js         |   2 +-
 .../exportAssignmentTopLevelClodule.js        |   2 +-
 .../exportAssignmentTopLevelEnumdule.js       |   2 +-
 .../exportAssignmentTopLevelFundule.js        |   2 +-
 .../exportAssignmentTopLevelIdentifier.js     |   2 +-
 .../reference/exportAssignmentVariable.js     |   2 +-
 tests/baselines/reference/exportBinding.js    |   8 +-
 .../exportClassExtendingIntersection.js       |   8 +-
 ...ationWithModuleSpecifierNameOnNextLine1.js |  10 +-
 .../exportDeclarationsInAmbientNamespaces.js  |   2 +-
 .../reference/exportDeclareClass1.js          |   2 +-
 .../reference/exportDeclaredModule.js         |   2 +-
 .../reference/exportDefaultAbstractClass.js   |   6 +-
 .../reference/exportDefaultProperty.js        |  18 +-
 .../reference/exportDefaultProperty2.js       |   8 +-
 .../reference/exportEqualCallable.js          |   2 +-
 .../reference/exportEqualErrorType.js         |   2 +-
 .../reference/exportEqualMemberMissing.js     |   2 +-
 .../reference/exportEqualsDefaultProperty.js  |   4 +-
 .../reference/exportEqualsProperty.js         |   2 +-
 .../reference/exportEqualsProperty2.js        |   2 +-
 tests/baselines/reference/exportImport.js     |   4 +-
 .../reference/exportImportMultipleFiles.js    |   6 +-
 .../exportImportNonInstantiatedModule2.js     |   6 +-
 .../exportNonInitializedVariablesAMD.js       |   2 +-
 .../exportNonInitializedVariablesCommonJS.js  |   2 +-
 .../exportNonInitializedVariablesUMD.js       |   2 +-
 .../exportRedeclarationTypeAliases.js         |   2 +-
 .../reference/exportSameNameFuncVar.js        |   2 +-
 .../reference/exportSpecifierForAGlobal.js    |   2 +-
 ...rtSpecifierReferencingOuterDeclaration2.js |   2 +-
 ...rtSpecifierReferencingOuterDeclaration4.js |   2 +-
 .../reference/exportStarForValues.js          |   4 +-
 .../reference/exportStarForValues2.js         |   6 +-
 .../reference/exportStarForValues3.js         |  10 +-
 .../reference/exportStarForValues4.js         |   6 +-
 .../reference/exportStarForValues5.js         |   4 +-
 .../reference/exportStarForValues7.js         |   6 +-
 .../reference/exportStarForValues8.js         |  10 +-
 .../reference/exportStarForValues9.js         |   6 +-
 tests/baselines/reference/exportToString.js   |   2 +-
 tests/baselines/reference/exportVisibility.js |   2 +-
 .../exportedBlockScopedDeclarations.js        |   2 +-
 ...InterfaceInaccessibleInCallbackInModule.js |   2 +-
 .../baselines/reference/exportedVariable1.js  |   2 +-
 .../exportingContainingVisibleType.errors.txt |  16 -
 .../exportingContainingVisibleType.js         |   2 +-
 .../exportingContainingVisibleType.symbols    |  20 +
 .../exportingContainingVisibleType.types      |  21 +
 .../baselines/reference/exportsAndImports1.js |   6 +-
 .../baselines/reference/exportsAndImports2.js |   6 +-
 .../baselines/reference/exportsAndImports3.js |   6 +-
 .../exportsAndImportsWithUnderscores1.js      |   8 +-
 .../exportsAndImportsWithUnderscores2.js      |   8 +-
 .../exportsAndImportsWithUnderscores3.js      |   8 +-
 .../exportsAndImportsWithUnderscores4.js      |   4 +-
 .../extendClassExpressionFromModule.js        |   2 +-
 ...xtendingClassFromAliasAndUsageInIndexer.js |   8 +-
 .../reference/extendsUntypedModule.js         |   4 +-
 .../reference/externalModuleAssignToVar.js    |   4 +-
 .../externalModuleExportingGenericClass.js    |   2 +-
 .../externalModuleImmutableBindings.js        |   4 +-
 .../reference/externalModuleQualification.js  |   2 +-
 ...ceOfImportDeclarationWithExportModifier.js |   4 +-
 ...ernceResolutionOrderInImportDeclaration.js |   4 +-
 .../reference/externalModuleResolution.js     |   2 +-
 .../reference/externalModuleResolution2.js    |   2 +-
 .../externalModuleWithoutCompilerFlag1.js     |   2 +-
 .../reference/fatarrowfunctionsErrors.js      |   2 +-
 .../fieldAndGetterWithSameName.errors.txt     |   5 +-
 .../reference/fieldAndGetterWithSameName.js   |   2 +-
 ...ilesEmittingIntoSameOutputWithOutOption.js |   2 +-
 .../functionAndImportNameConflict.js          |   4 +-
 ...functionAndPropertyNameConflict.errors.txt |   5 +-
 .../functionLikeInParameterInitializer.js     |   2 +-
 .../reference/genericArrayExtenstions.js      |   2 +-
 .../reference/genericClassesInModule2.js      |   2 +-
 .../reference/genericGetter.errors.txt        |   5 +-
 .../reference/genericGetter2.errors.txt       |   5 +-
 .../reference/genericGetter3.errors.txt       |   5 +-
 .../genericInterfaceFunctionTypeParameter.js  |   2 +-
 .../reference/genericMemberFunction.js        |   2 +-
 ...ericRecursiveImplicitConstructorErrors1.js |   2 +-
 .../genericReturnTypeFromGetter1.errors.txt   |   5 +-
 .../reference/genericReturnTypeFromGetter1.js |   2 +-
 .../genericTypeWithMultipleBases1.js          |   2 +-
 .../genericTypeWithMultipleBases2.js          |   2 +-
 .../genericWithIndexerOfTypeParameterType2.js |   2 +-
 ...ReturnTypeAndFunctionClassMerge.errors.txt |   5 +-
 .../getAndSetAsMemberNames.errors.txt         |  27 -
 .../reference/getAndSetAsMemberNames.symbols  |  47 ++
 .../reference/getAndSetAsMemberNames.types    |  54 ++
 .../getAndSetNotIdenticalType.errors.txt      |   8 +-
 .../getAndSetNotIdenticalType2.errors.txt     |   8 +-
 .../getAndSetNotIdenticalType3.errors.txt     |   8 +-
 .../reference/getsetReturnTypes.errors.txt    |  13 -
 .../reference/getsetReturnTypes.symbols       |  23 +
 .../reference/getsetReturnTypes.types         |  29 +
 .../getterMissingReturnError.errors.txt       |   5 +-
 ...erThatThrowsShouldNotNeedReturn.errors.txt |  15 -
 ...etterThatThrowsShouldNotNeedReturn.symbols |  16 +
 .../getterThatThrowsShouldNotNeedReturn.types |  18 +
 .../reference/gettersAndSetters.errors.txt    |  20 +-
 .../gettersAndSettersAccessibility.errors.txt |   8 +-
 .../gettersAndSettersErrors.errors.txt        |  22 +-
 .../gettersAndSettersTypesAgree.errors.txt    |  37 --
 .../gettersAndSettersTypesAgree.symbols       |  31 ++
 .../gettersAndSettersTypesAgree.types         |  37 ++
 tests/baselines/reference/giant.errors.txt    | 288 +++++-----
 tests/baselines/reference/giant.js            |   2 +-
 .../globalAugmentationModuleResolution.js     |   2 +-
 .../illegalSuperCallsInConstructor.errors.txt |   8 +-
 .../implicitAnyCastedValue.errors.txt         |  11 +-
 ...AndSetAccessorWithAnyReturnType.errors.txt |  14 +-
 ...sAnExternalModuleInsideAnInternalModule.js |   4 +-
 .../baselines/reference/importAsBaseClass.js  |   4 +-
 tests/baselines/reference/importDecl.js       |  12 +-
 ...eclRefereingExternalModuleWithNoResolve.js |   2 +-
 .../reference/importDeclWithClassModifiers.js |   2 +-
 .../importDeclWithDeclareModifier.js          |   2 +-
 .../reference/importDeclWithExportModifier.js |   2 +-
 ...clWithExportModifierAndExportAssignment.js |   2 +-
 .../importDeclarationUsedAsTypeQuery.js       |   4 +-
 .../reference/importImportOnlyModule.js       |   6 +-
 .../baselines/reference/importInsideModule.js |   2 +-
 .../reference/importNonExternalModule.js      |   2 +-
 .../reference/importNonStringLiteral.js       |   2 +-
 .../baselines/reference/importTsBeforeDTs.js  |   4 +-
 .../reference/importUsedInExtendsList1.js     |   4 +-
 .../reference/importWithTrailingSlash.js      |  20 +-
 .../importWithTrailingSlash_noResolve.js      |   2 +-
 .../import_reference-exported-alias.js        |   2 +-
 .../import_reference-to-type-alias.js         |   4 +-
 ...-referenecing-aliased-type-throug-array.js |   2 +-
 ...ar-referencing-an-imported-module-alias.js |   4 +-
 .../importedAliasesInTypePositions.js         |   4 +-
 .../reference/importedModuleClassNameClash.js |   2 +-
 .../reference/importsImplicitlyReadonly.js    |   4 +-
 .../reference/indexedAccessRelation.js        |   2 +-
 .../reference/indexedAccessTypeConstraints.js |   2 +-
 .../reference/inferSetterParamType.errors.txt |  14 +-
 .../infinitelyExpandingOverloads.errors.txt   |  32 --
 .../infinitelyExpandingOverloads.symbols      |  88 ++++
 .../infinitelyExpandingOverloads.types        |  90 ++++
 ...emberAccessorOverridingAccessor.errors.txt |  32 --
 ...ceMemberAccessorOverridingAccessor.symbols |  31 ++
 ...anceMemberAccessorOverridingAccessor.types |  33 ++
 ...eMemberAccessorOverridingMethod.errors.txt |   8 +-
 ...emberAccessorOverridingProperty.errors.txt |  21 -
 ...ceMemberAccessorOverridingProperty.symbols |  23 +
 ...anceMemberAccessorOverridingProperty.types |  24 +
 ...nceMemberFuncOverridingAccessor.errors.txt |   8 +-
 ...emberPropertyOverridingAccessor.errors.txt |  22 -
 ...ceMemberPropertyOverridingAccessor.symbols |  34 ++
 ...anceMemberPropertyOverridingAccessor.types |  35 ++
 ...taticAccessorOverridingAccessor.errors.txt |  32 --
 ...ceStaticAccessorOverridingAccessor.symbols |  31 ++
 ...anceStaticAccessorOverridingAccessor.types |  33 ++
 ...eStaticAccessorOverridingMethod.errors.txt |   8 +-
 ...taticAccessorOverridingProperty.errors.txt |  21 -
 ...ceStaticAccessorOverridingProperty.symbols |  23 +
 ...anceStaticAccessorOverridingProperty.types |  24 +
 ...nceStaticFuncOverridingAccessor.errors.txt |   8 +-
 ...uncOverridingAccessorOfFuncType.errors.txt |  17 -
 ...icFuncOverridingAccessorOfFuncType.symbols |  21 +
 ...aticFuncOverridingAccessorOfFuncType.types |  23 +
 ...taticPropertyOverridingAccessor.errors.txt |  20 -
 ...ceStaticPropertyOverridingAccessor.symbols |  22 +
 ...anceStaticPropertyOverridingAccessor.types |  23 +
 .../reference/instanceOfInExternalModules.js  |   4 +-
 ...ropertiesInheritedIntoClassType.errors.txt |  14 +-
 .../instancePropertyInClassType.errors.txt    |  14 +-
 .../reference/interfaceContextualType.js      |   2 +-
 .../reference/interfaceDeclaration3.js        |   2 +-
 .../reference/interfaceDeclaration5.js        |   2 +-
 .../interfaceExtendingClass.errors.txt        |  25 -
 .../reference/interfaceExtendingClass.symbols |  56 ++
 .../reference/interfaceExtendingClass.types   |  59 +++
 .../interfaceImplementation5.errors.txt       |  58 --
 .../interfaceImplementation5.symbols          |  71 +++
 .../reference/interfaceImplementation5.types  |  73 +++
 .../reference/interfaceImplementation6.js     |   2 +-
 ...alAliasClassInsideLocalModuleWithExport.js |   2 +-
 ...liasClassInsideLocalModuleWithoutExport.js |   2 +-
 ...sideLocalModuleWithoutExportAccessError.js |   2 +-
 ...liasClassInsideTopLevelModuleWithExport.js |   2 +-
 ...sClassInsideTopLevelModuleWithoutExport.js |   2 +-
 ...nalAliasEnumInsideLocalModuleWithExport.js |   2 +-
 ...AliasEnumInsideLocalModuleWithoutExport.js |   2 +-
 ...sideLocalModuleWithoutExportAccessError.js |   2 +-
 ...AliasEnumInsideTopLevelModuleWithExport.js |   2 +-
 ...asEnumInsideTopLevelModuleWithoutExport.js |   2 +-
 ...liasFunctionInsideLocalModuleWithExport.js |   2 +-
 ...sFunctionInsideLocalModuleWithoutExport.js |   2 +-
 ...sideLocalModuleWithoutExportAccessError.js |   2 +-
 ...sFunctionInsideTopLevelModuleWithExport.js |   2 +-
 ...nctionInsideTopLevelModuleWithoutExport.js |   2 +-
 ...alizedModuleInsideLocalModuleWithExport.js |   2 +-
 ...zedModuleInsideLocalModuleWithoutExport.js |   2 +-
 ...sideLocalModuleWithoutExportAccessError.js |   2 +-
 ...zedModuleInsideTopLevelModuleWithExport.js |   2 +-
 ...ModuleInsideTopLevelModuleWithoutExport.js |   2 +-
 ...iasInterfaceInsideLocalModuleWithExport.js |   2 +-
 ...InterfaceInsideLocalModuleWithoutExport.js |   2 +-
 ...sideLocalModuleWithoutExportAccessError.js |   2 +-
 ...InterfaceInsideTopLevelModuleWithExport.js |   2 +-
 ...erfaceInsideTopLevelModuleWithoutExport.js |   2 +-
 ...alizedModuleInsideLocalModuleWithExport.js |   2 +-
 ...zedModuleInsideLocalModuleWithoutExport.js |   2 +-
 ...sideLocalModuleWithoutExportAccessError.js |   2 +-
 ...zedModuleInsideTopLevelModuleWithExport.js |   2 +-
 ...ModuleInsideTopLevelModuleWithoutExport.js |   2 +-
 ...rnalAliasVarInsideLocalModuleWithExport.js |   2 +-
 ...lAliasVarInsideLocalModuleWithoutExport.js |   2 +-
 ...sideLocalModuleWithoutExportAccessError.js |   2 +-
 ...lAliasVarInsideTopLevelModuleWithExport.js |   2 +-
 ...iasVarInsideTopLevelModuleWithoutExport.js |   2 +-
 .../reference/intersectionTypeInference1.js   |   2 +-
 .../invalidSyntaxNamespaceImportWithAMD.js    |   4 +-
 ...nvalidSyntaxNamespaceImportWithCommonjs.js |   4 +-
 .../baselines/reference/isLiteral1.errors.txt |   7 +
 .../baselines/reference/isLiteral2.errors.txt |   7 +
 .../isolatedModulesSpecifiedModule.js         |   2 +-
 .../isolatedModulesUnspecifiedModule.js       |   2 +-
 ...jsFileCompilationRestParamJsDocFunction.js |   4 +-
 .../reference/jsxImportInAttribute.js         |   6 +-
 tests/baselines/reference/jsxViaImport.2.js   |   2 +-
 tests/baselines/reference/jsxViaImport.js     |   2 +-
 .../baselines/reference/keepImportsInDts1.js  |   2 +-
 .../baselines/reference/keepImportsInDts2.js  |   4 +-
 .../baselines/reference/keepImportsInDts3.js  |   4 +-
 .../baselines/reference/keepImportsInDts4.js  |   4 +-
 tests/baselines/reference/keywordField.js     |   6 +-
 .../reference/keywordInJsxIdentifier.js       |   4 +-
 .../reference/localAliasExportAssignment.js   |   2 +-
 .../baselines/reference/mapOnTupleTypes01.js  |   2 +-
 .../baselines/reference/mapOnTupleTypes02.js  |   2 +-
 .../memberAccessMustUseModuleInstances.js     |   4 +-
 .../reference/mergeWithImportedNamespace.js   |   4 +-
 .../reference/mergeWithImportedType.js        |   4 +-
 .../reference/mergedDeclarations6.js          |   4 +-
 .../reference/mergedDeclarations7.js          |   2 +-
 .../mergedModuleDeclarationCodeGen.js         |   2 +-
 .../reference/metadataOfStringLiteral.js      |   2 +-
 tests/baselines/reference/metadataOfUnion.js  |  14 +-
 .../reference/metadataOfUnionWithNull.js      |  24 +-
 .../missingFunctionImplementation.js          |   2 +-
 .../missingFunctionImplementation2.js         |   4 +-
 .../missingSemicolonInModuleSpecifier.js      |   4 +-
 .../moduleAliasAsFunctionArgument.js          |   4 +-
 ...gmentationCollidingNamesInAugmentation1.js |   8 +-
 .../moduleAugmentationDeclarationEmit1.js     |   6 +-
 .../moduleAugmentationDeclarationEmit2.js     |   6 +-
 .../moduleAugmentationDisallowedExtensions.js |  10 +-
 .../moduleAugmentationExtendAmbientModule1.js |   4 +-
 .../moduleAugmentationExtendAmbientModule2.js |   4 +-
 .../moduleAugmentationExtendFileModule1.js    |   6 +-
 .../moduleAugmentationExtendFileModule2.js    |   6 +-
 .../reference/moduleAugmentationGlobal1.js    |   4 +-
 .../reference/moduleAugmentationGlobal2.js    |   4 +-
 .../reference/moduleAugmentationGlobal3.js    |   6 +-
 .../reference/moduleAugmentationGlobal4.js    |   6 +-
 .../reference/moduleAugmentationGlobal5.js    |   2 +-
 .../moduleAugmentationImportsAndExports1.js   |   8 +-
 .../moduleAugmentationImportsAndExports2.js   |   8 +-
 .../moduleAugmentationImportsAndExports3.js   |   8 +-
 .../moduleAugmentationImportsAndExports4.js   |   8 +-
 .../moduleAugmentationImportsAndExports5.js   |   8 +-
 .../moduleAugmentationImportsAndExports6.js   |   8 +-
 .../moduleAugmentationInAmbientModule1.js     |   2 +-
 .../moduleAugmentationInAmbientModule2.js     |   2 +-
 .../moduleAugmentationInAmbientModule3.js     |   2 +-
 .../moduleAugmentationInAmbientModule4.js     |   2 +-
 .../moduleAugmentationInAmbientModule5.js     |   2 +-
 .../moduleAugmentationInDependency.js         |   2 +-
 .../moduleAugmentationInDependency2.js        |   4 +-
 .../reference/moduleAugmentationNoNewNames.js |   6 +-
 .../reference/moduleAugmentationsImports1.js  |   8 +-
 .../reference/moduleAugmentationsImports2.js  |  10 +-
 .../reference/moduleAugmentationsImports3.js  |   8 +-
 .../reference/moduleAugmentationsImports4.js  |   6 +-
 .../baselines/reference/moduleCodeGenTest5.js |   2 +-
 .../baselines/reference/moduleCodegenTest4.js |   2 +-
 .../reference/moduleDuplicateIdentifiers.js   |   2 +-
 tests/baselines/reference/moduleExports1.js   |   2 +-
 .../moduleImportedForTypeArgumentPosition.js  |   4 +-
 .../reference/moduleInTypePosition1.js        |   4 +-
 .../reference/moduleMergeConstructor.js       |   2 +-
 tests/baselines/reference/moduleNoneErrors.js |   2 +-
 .../baselines/reference/modulePrologueAMD.js  |   2 +-
 .../reference/modulePrologueCommonjs.js       |   2 +-
 .../baselines/reference/modulePrologueUmd.js  |   2 +-
 .../reference/moduleResolutionNoResolve.js    |   4 +-
 .../reference/moduleResolutionNoTs.js         |  10 +-
 .../moduleResolutionWithExtensions.js         |  10 +-
 ...leResolutionWithExtensions_notSupported.js |   2 +-
 ...eResolutionWithExtensions_notSupported2.js |   2 +-
 ...eResolutionWithExtensions_notSupported3.js |   2 +-
 ...moduleResolutionWithExtensions_preferTs.js |   6 +-
 ...duleResolutionWithExtensions_unexpected.js |   2 +-
 ...uleResolutionWithExtensions_unexpected2.js |   2 +-
 ...lutionWithExtensions_withAmbientPresent.js |   2 +-
 .../reference/moduleResolutionWithSymlinks.js |   6 +-
 ...ResolutionWithSymlinks_notInNodeModules.js |   6 +-
 ...moduleResolutionWithSymlinks_withOutDir.js |   6 +-
 ...duleSameValueDuplicateExportedBindings1.js |   6 +-
 ...duleSameValueDuplicateExportedBindings2.js |   6 +-
 tests/baselines/reference/moduleScoping.js    |   4 +-
 .../baselines/reference/multiImportExport.js  |   4 +-
 .../reference/multipleExportDefault1.js       |   6 +-
 .../reference/multipleExportDefault2.js       |   6 +-
 .../reference/multipleExportDefault3.js       |   6 +-
 .../reference/multipleExportDefault4.js       |   6 +-
 .../reference/multipleExportDefault5.js       |   6 +-
 .../reference/multipleExportDefault6.js       |   6 +-
 tests/baselines/reference/multipleExports.js  |   2 +-
 .../reference/nameDelimitedBySlashes.js       |   4 +-
 .../reference/nameWithFileExtension.js        |   4 +-
 .../reference/nameWithRelativePaths.js        |   8 +-
 .../narrowingConstrainedTypeParameter.js      |   2 +-
 .../reference/nestedClassDeclaration.js       |   2 +-
 .../reference/newOperator.errors.txt          |   5 +-
 .../reference/newWithSpread.errors.txt        | 177 -------
 .../baselines/reference/newWithSpread.symbols | 273 ++++++++++
 tests/baselines/reference/newWithSpread.types | 494 ++++++++++++++++++
 ...xpressionAndLocalVarInAccessors.errors.txt |  58 --
 ...isExpressionAndLocalVarInAccessors.symbols |  94 ++++
 ...ThisExpressionAndLocalVarInAccessors.types | 116 ++++
 ...ortModuleAugmentationInDeclarationFile2.js |   2 +-
 ...ortModuleAugmentationInDeclarationFile3.js |   2 +-
 ...ImplicitAnyDestructuringInPrivateMethod.js |   2 +-
 .../reference/noImplicitUseStrict_amd.js      |   2 +-
 .../reference/noImplicitUseStrict_commonjs.js |   2 +-
 .../reference/noImplicitUseStrict_umd.js      |   2 +-
 tests/baselines/reference/nodeResolution1.js  |   4 +-
 tests/baselines/reference/nodeResolution2.js  |   2 +-
 tests/baselines/reference/nodeResolution3.js  |   2 +-
 tests/baselines/reference/nodeResolution4.js  |   4 +-
 tests/baselines/reference/nodeResolution5.js  |   2 +-
 tests/baselines/reference/nodeResolution6.js  |   2 +-
 tests/baselines/reference/nodeResolution7.js  |   2 +-
 tests/baselines/reference/nodeResolution8.js  |   2 +-
 .../baselines/reference/nonMergedOverloads.js |   2 +-
 .../nounusedTypeParameterConstraint.js        |   4 +-
 ...rConstrainsPropertyDeclarations.errors.txt |  17 +-
 ...bjectBindingPatternKeywordIdentifiers01.js |   2 +-
 ...bjectBindingPatternKeywordIdentifiers02.js |   2 +-
 ...bjectBindingPatternKeywordIdentifiers03.js |   2 +-
 ...bjectBindingPatternKeywordIdentifiers04.js |   2 +-
 tests/baselines/reference/objectIndexer.js    |   2 +-
 .../objectLitPropertyScoping.errors.txt       |  24 -
 .../objectLitPropertyScoping.symbols          |  37 ++
 .../reference/objectLitPropertyScoping.types  |  44 ++
 .../objectLiteralErrorsES3.errors.txt         |  20 -
 .../reference/objectLiteralErrorsES3.symbols  |  17 +
 .../reference/objectLiteralErrorsES3.types    |  22 +
 .../objectLiteralGettersAndSetters.errors.txt | 188 -------
 .../objectLiteralGettersAndSetters.symbols    | 256 +++++++++
 .../objectLiteralGettersAndSetters.types      | 295 +++++++++++
 ...jectLiteralMemberWithModifiers2.errors.txt |   5 +-
 ...ndPropertiesErrorFromNotUsingIdentifier.js |  12 +-
 ...alWithGetAccessorInsideFunction.errors.txt |  14 -
 ...teralWithGetAccessorInsideFunction.symbols |  19 +
 ...LiteralWithGetAccessorInsideFunction.types |  21 +
 ...eWithStringNamedNumericProperty.errors.txt | 153 ++++++
 ...ctTypesIdentityWithConstructSignatures2.js |   2 +-
 ...ConstructSignaturesDifferingParamCounts.js |   2 +-
 ...nstructSignaturesDifferingByConstraints.js |   2 +-
 ...structSignaturesDifferingByConstraints2.js |   2 +-
 ...structSignaturesDifferingByConstraints3.js |   2 +-
 ...onstructSignaturesDifferingByReturnType.js |   2 +-
 ...nstructSignaturesDifferingByReturnType2.js |   2 +-
 ...tSignaturesDifferingTypeParameterCounts.js |   2 +-
 ...ctSignaturesDifferingTypeParameterNames.js |   2 +-
 ...enericConstructSignaturesOptionalParams.js |   2 +-
 ...nericConstructSignaturesOptionalParams2.js |   2 +-
 ...nericConstructSignaturesOptionalParams3.js |   2 +-
 .../octalLiteralInStrictModeES3.errors.txt    |   5 +-
 .../reference/optionalSetterParam.errors.txt  |   6 +-
 .../reference/overloadModifiersMustAgree.js   |   2 +-
 tests/baselines/reference/packageJsonMain.js  |   2 +-
 .../packageJsonMain_isNonRecursive.js         |   2 +-
 tests/baselines/reference/parser0_004152.js   |   2 +-
 tests/baselines/reference/parser509546.js     |   2 +-
 tests/baselines/reference/parser509546_1.js   |   2 +-
 tests/baselines/reference/parser509546_2.js   |   2 +-
 tests/baselines/reference/parser618973.js     |   2 +-
 .../reference/parserArgumentList1.js          |   2 +-
 .../reference/parserAstSpans1.errors.txt      |  20 +-
 tests/baselines/reference/parserClass1.js     |   2 +-
 tests/baselines/reference/parserClass2.js     |   2 +-
 .../reference/parserES3Accessors1.errors.txt  |   5 +-
 .../reference/parserES3Accessors2.errors.txt  |   9 -
 .../reference/parserES3Accessors2.symbols     |   8 +
 .../reference/parserES3Accessors2.types       |   8 +
 .../reference/parserES3Accessors3.errors.txt  |   5 +-
 .../reference/parserES3Accessors4.errors.txt  |   7 -
 .../reference/parserES3Accessors4.symbols     |   6 +
 .../reference/parserES3Accessors4.types       |   7 +
 tests/baselines/reference/parserEnum1.js      |   2 +-
 tests/baselines/reference/parserEnum2.js      |   2 +-
 tests/baselines/reference/parserEnum3.js      |   2 +-
 tests/baselines/reference/parserEnum4.js      |   2 +-
 .../parserErrantSemicolonInClass1.errors.txt  |  15 +-
 .../parserErrorRecovery_ObjectLiteral2.js     |   2 +-
 .../parserErrorRecovery_ObjectLiteral3.js     |   2 +-
 .../parserErrorRecovery_ObjectLiteral4.js     |   2 +-
 .../parserErrorRecovery_ObjectLiteral5.js     |   2 +-
 .../parserExportAsFunctionIdentifier.js       |   2 +-
 .../reference/parserInterfaceDeclaration6.js  |   2 +-
 .../reference/parserInterfaceDeclaration7.js  |   2 +-
 .../parserKeywordsAsIdentifierName1.js        |   6 +-
 .../parserModifierOnStatementInBlock1.js      |   2 +-
 .../parserModifierOnStatementInBlock3.js      |   2 +-
 tests/baselines/reference/parserModule1.js    |   2 +-
 .../parserReturnStatement4.errors.txt         |   7 -
 .../reference/parserReturnStatement4.symbols  |   5 +
 .../reference/parserReturnStatement4.types    |   6 +
 .../parserShorthandPropertyAssignment2.js     |   2 +-
 .../reference/parserSuperExpression3.js       |   2 +-
 ...thMappingBasedModuleResolution1_classic.js |   2 +-
 .../pathMappingBasedModuleResolution1_node.js |   2 +-
 ...thMappingBasedModuleResolution2_classic.js |   2 +-
 .../pathMappingBasedModuleResolution2_node.js |   2 +-
 ...thMappingBasedModuleResolution3_classic.js |   8 +-
 .../pathMappingBasedModuleResolution3_node.js |   6 +-
 ...thMappingBasedModuleResolution4_classic.js |   8 +-
 .../pathMappingBasedModuleResolution4_node.js |   6 +-
 ...thMappingBasedModuleResolution5_classic.js |  10 +-
 .../pathMappingBasedModuleResolution5_node.js |   8 +-
 ...thMappingBasedModuleResolution6_classic.js |   4 +-
 .../pathMappingBasedModuleResolution6_node.js |   4 +-
 ...thMappingBasedModuleResolution7_classic.js |   6 +-
 .../pathMappingBasedModuleResolution7_node.js |   6 +-
 ...pingBasedModuleResolution_withExtension.js |   6 +-
 ...leResolution_withExtension_failedLookup.js |   2 +-
 .../prespecializedGenericMembers1.js          |   2 +-
 .../privacyCannotNameVarTypeDeclFile.js       |   6 +-
 .../privacyCheckAnonymousFunctionParameter.js |   2 +-
 ...privacyCheckAnonymousFunctionParameter2.js |   2 +-
 ...lbackOfInterfaceMethodWithTypeParameter.js |   2 +-
 ...nalModuleExportAssignmentOfGenericClass.js |   2 +-
 ...arameterReferenceInConstructorParameter.js |   2 +-
 .../reference/privacyCheckTypeOfFunction.js   |   2 +-
 tests/baselines/reference/privacyClass.js     |   2 +-
 .../privacyClassExtendsClauseDeclFile.js      |   2 +-
 .../privacyClassImplementsClauseDeclFile.js   |   2 +-
 ...FunctionCannotNameParameterTypeDeclFile.js |   6 +-
 ...acyFunctionCannotNameReturnTypeDeclFile.js |   6 +-
 .../privacyFunctionParameterDeclFile.js       |   2 +-
 .../privacyFunctionReturnTypeDeclFile.js      |   2 +-
 tests/baselines/reference/privacyGloFunc.js   |   2 +-
 tests/baselines/reference/privacyImport.js    |   2 +-
 .../reference/privacyImportParseErrors.js     |   2 +-
 tests/baselines/reference/privacyInterface.js |   2 +-
 .../privacyInterfaceExtendsClauseDeclFile.js  |   2 +-
 ...yLocalInternalReferenceImportWithExport.js |   2 +-
 ...calInternalReferenceImportWithoutExport.js |   2 +-
 ...elAmbientExternalModuleImportWithExport.js |   6 +-
 ...mbientExternalModuleImportWithoutExport.js |   6 +-
 ...pLevelInternalReferenceImportWithExport.js |   2 +-
 ...velInternalReferenceImportWithoutExport.js |   2 +-
 .../privacyTypeParameterOfFunction.js         |   2 +-
 .../privacyTypeParameterOfFunctionDeclFile.js |   2 +-
 .../reference/privacyTypeParametersOfClass.js |   2 +-
 .../privacyTypeParametersOfClassDeclFile.js   |   2 +-
 .../privacyTypeParametersOfInterface.js       |   2 +-
 ...rivacyTypeParametersOfInterfaceDeclFile.js |   2 +-
 tests/baselines/reference/privacyVar.js       |   2 +-
 .../baselines/reference/privacyVarDeclFile.js |   2 +-
 ...ssPropertyAccessibleWithinClass.errors.txt |  58 --
 ...ClassPropertyAccessibleWithinClass.symbols | 126 +++++
 ...teClassPropertyAccessibleWithinClass.types | 141 +++++
 .../privatePropertyUsingObjectType.js         |   2 +-
 .../reference/project/baseline/amd/decl.js    |   2 +-
 .../reference/project/baseline/amd/emit.js    |   2 +-
 .../reference/project/baseline/node/decl.js   |   2 +-
 .../reference/project/baseline/node/emit.js   |   2 +-
 .../reference/project/baseline2/amd/decl.js   |   2 +-
 .../project/baseline2/amd/dont_emit.js        |   2 +-
 .../reference/project/baseline2/node/decl.js  |   2 +-
 .../project/baseline2/node/dont_emit.js       |   2 +-
 .../project/baseline3/amd/nestedModule.js     |   2 +-
 .../project/baseline3/node/nestedModule.js    |   2 +-
 .../reference/project/declarationDir/amd/a.js |   2 +-
 .../project/declarationDir/amd/subfolder/b.js |   2 +-
 .../project/declarationDir/amd/subfolder/c.js |   2 +-
 .../project/declarationDir/node/a.js          |   2 +-
 .../declarationDir/node/subfolder/b.js        |   2 +-
 .../declarationDir/node/subfolder/c.js        |   2 +-
 .../project/declarationDir2/amd/out/a.js      |   2 +-
 .../declarationDir2/amd/out/subfolder/b.js    |   2 +-
 .../declarationDir2/amd/out/subfolder/c.js    |   2 +-
 .../project/declarationDir2/node/out/a.js     |   2 +-
 .../declarationDir2/node/out/subfolder/b.js   |   2 +-
 .../declarationDir2/node/out/subfolder/c.js   |   2 +-
 .../project/declarationDir3/amd/out.js        |   6 +-
 .../declarationsCascadingImports/amd/m4.js    |   2 +-
 .../declarationsCascadingImports/node/m4.js   |   2 +-
 .../declarationsGlobalImport/amd/glo_m4.js    |   2 +-
 .../declarationsGlobalImport/amd/useModule.js |   2 +-
 .../declarationsGlobalImport/node/glo_m4.js   |   2 +-
 .../node/useModule.js                         |   2 +-
 .../amd/private_m4.js                         |   2 +-
 .../amd/useModule.js                          |   2 +-
 .../node/private_m4.js                        |   2 +-
 .../node/useModule.js                         |   2 +-
 .../amd/fncOnly_m4.js                         |   2 +-
 .../amd/useModule.js                          |   2 +-
 .../node/fncOnly_m4.js                        |   2 +-
 .../node/useModule.js                         |   2 +-
 .../amd/m4.js                                 |   2 +-
 .../amd/m5.js                                 |   2 +-
 .../amd/useModule.js                          |   2 +-
 .../node/m4.js                                |   2 +-
 .../node/m5.js                                |   2 +-
 .../node/useModule.js                         |   2 +-
 .../declarationsMultipleTimesImport/amd/m4.js |   2 +-
 .../amd/useModule.js                          |   2 +-
 .../node/m4.js                                |   2 +-
 .../node/useModule.js                         |   2 +-
 .../amd/m4.js                                 |   2 +-
 .../amd/m5.js                                 |   2 +-
 .../amd/useModule.js                          |   2 +-
 .../node/m4.js                                |   2 +-
 .../node/m5.js                                |   2 +-
 .../node/useModule.js                         |   2 +-
 .../declarationsSimpleImport/amd/m4.js        |   2 +-
 .../declarationsSimpleImport/amd/useModule.js |   2 +-
 .../declarationsSimpleImport/node/m4.js       |   2 +-
 .../node/useModule.js                         |   2 +-
 .../amd/ref/m2.js                             |   2 +-
 .../node/ref/m2.js                            |   2 +-
 .../amd/outdir/simple/ref/m2.js               |   2 +-
 .../node/outdir/simple/ref/m2.js              |   2 +-
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 delete mode 100644 tests/baselines/reference/typeOfThisInInstanceMember2.errors.txt
 create mode 100644 tests/baselines/reference/typeOfThisInInstanceMember2.symbols
 create mode 100644 tests/baselines/reference/typeOfThisInInstanceMember2.types
 delete mode 100644 tests/baselines/reference/typeOfThisInStatics.errors.txt
 create mode 100644 tests/baselines/reference/typeOfThisInStatics.symbols
 create mode 100644 tests/baselines/reference/typeOfThisInStatics.types
 delete mode 100644 tests/baselines/reference/typeQueryOnClass.errors.txt
 create mode 100644 tests/baselines/reference/typeQueryOnClass.symbols
 create mode 100644 tests/baselines/reference/typeQueryOnClass.types
 delete mode 100644 tests/baselines/reference/unusedLocalsAndParametersDeferred.errors.txt
 create mode 100644 tests/baselines/reference/unusedLocalsAndParametersDeferred.symbols
 create mode 100644 tests/baselines/reference/unusedLocalsAndParametersDeferred.types

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 321cc06f7651d..9bd0a3ffac4cd 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1486,7 +1486,7 @@ namespace ts {
     }
 
     export function getEmitScriptTarget(compilerOptions: CompilerOptions) {
-        return compilerOptions.target || ScriptTarget.ES3;
+        return compilerOptions.target || ScriptTarget.ES5;
     }
 
     export function getEmitModuleKind(compilerOptions: CompilerOptions) {
diff --git a/src/harness/unittests/compileOnSave.ts b/src/harness/unittests/compileOnSave.ts
index eaab86b4ebc45..22319addebf1f 100644
--- a/src/harness/unittests/compileOnSave.ts
+++ b/src/harness/unittests/compileOnSave.ts
@@ -558,13 +558,13 @@ namespace ts.projectSystem {
 
             const expectedEmittedFileName = "/a/b/f1.js";
             assert.isTrue(host.fileExists(expectedEmittedFileName));
-            assert.equal(host.readFile(expectedEmittedFileName), `"use strict";\r\nexports.__esModule = true;\r\nfunction Foo() { return 10; }\r\nexports.Foo = Foo;\r\n`);
+            assert.equal(host.readFile(expectedEmittedFileName), `"use strict";\r\nObject.defineProperty(exports, "__esModule", { value: true });\r\nfunction Foo() { return 10; }\r\nexports.Foo = Foo;\r\n`);
         });
 
-        it("shoud not emit js files in external projects", () => {
+        it("should not emit js files in external projects", () => {
             const file1 = {
                 path: "/a/b/file1.ts",
-                content: "consonle.log('file1');"
+                content: "console.log('file1');"
             };
             // file2 has errors. The emitting should not be blocked.
             const file2 = {
@@ -601,4 +601,4 @@ namespace ts.projectSystem {
             assert.isTrue(outFileContent.indexOf(file3.content) === -1);
         });
     });
-}
\ No newline at end of file
+}
diff --git a/tests/baselines/reference/APISample_compile.js b/tests/baselines/reference/APISample_compile.js
index 35d4935045777..0b9d273e23cff 100644
--- a/tests/baselines/reference/APISample_compile.js
+++ b/tests/baselines/reference/APISample_compile.js
@@ -45,7 +45,7 @@ compile(process.argv.slice(2), {
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ts = require("typescript");
 function compile(fileNames, options) {
     var program = ts.createProgram(fileNames, options);
diff --git a/tests/baselines/reference/APISample_linter.js b/tests/baselines/reference/APISample_linter.js
index 51b208c39c902..79c4f5efcd6d1 100644
--- a/tests/baselines/reference/APISample_linter.js
+++ b/tests/baselines/reference/APISample_linter.js
@@ -70,7 +70,7 @@ fileNames.forEach(fileName => {
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#traversing-the-ast-with-a-little-linter
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ts = require("typescript");
 function delint(sourceFile) {
     delintNode(sourceFile);
diff --git a/tests/baselines/reference/APISample_parseConfig.js b/tests/baselines/reference/APISample_parseConfig.js
index 690efb359c641..609d65d57dde0 100644
--- a/tests/baselines/reference/APISample_parseConfig.js
+++ b/tests/baselines/reference/APISample_parseConfig.js
@@ -42,7 +42,7 @@ export function createProgram(rootFiles: string[], compilerOptionsJson: string):
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-minimal-compiler
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ts = require("typescript");
 function printError(error) {
     if (!error) {
diff --git a/tests/baselines/reference/APISample_transform.js b/tests/baselines/reference/APISample_transform.js
index 47f63f56e704b..7b74cd3af8eed 100644
--- a/tests/baselines/reference/APISample_transform.js
+++ b/tests/baselines/reference/APISample_transform.js
@@ -22,7 +22,7 @@ console.log(JSON.stringify(result));
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#a-simple-transform-function
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ts = require("typescript");
 var source = "let x: string  = 'string'";
 var result = ts.transpile(source, { module: ts.ModuleKind.CommonJS });
diff --git a/tests/baselines/reference/APISample_watcher.js b/tests/baselines/reference/APISample_watcher.js
index b813a44f53e3c..e5307c2a07ba6 100644
--- a/tests/baselines/reference/APISample_watcher.js
+++ b/tests/baselines/reference/APISample_watcher.js
@@ -116,7 +116,7 @@ watch(currentDirectoryFiles, { module: ts.ModuleKind.CommonJS });
          at: https://github.com/Microsoft/TypeScript/wiki/Using-the-Compiler-API#incremental-build-support-using-the-language-services
  *       Please log a "breaking change" issue for any API breaking change affecting this issue
  */
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ts = require("typescript");
 function watch(rootFileNames, options) {
     var files = {};
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt
deleted file mode 100644
index 6437cfbc73d47..0000000000000
--- a/tests/baselines/reference/ES3For-ofTypeCheck1.errors.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts(1,15): error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts (1 errors) ====
-    for (var v of "") { }
-                  ~~
-!!! error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck1.symbols b/tests/baselines/reference/ES3For-ofTypeCheck1.symbols
new file mode 100644
index 0000000000000..c7d17a31763cb
--- /dev/null
+++ b/tests/baselines/reference/ES3For-ofTypeCheck1.symbols
@@ -0,0 +1,4 @@
+=== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts ===
+for (var v of "") { }
+>v : Symbol(v, Decl(ES3For-ofTypeCheck1.ts, 0, 8))
+
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck1.types b/tests/baselines/reference/ES3For-ofTypeCheck1.types
new file mode 100644
index 0000000000000..3b5af3905ccb5
--- /dev/null
+++ b/tests/baselines/reference/ES3For-ofTypeCheck1.types
@@ -0,0 +1,5 @@
+=== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck1.ts ===
+for (var v of "") { }
+>v : string
+>"" : ""
+
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt b/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt
deleted file mode 100644
index 80e60008da4cc..0000000000000
--- a/tests/baselines/reference/ES3For-ofTypeCheck4.errors.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck4.ts(2,17): error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck4.ts (1 errors) ====
-    var union: string | string[];
-    for (const v of union) { }
-                    ~~~~~
-!!! error TS2494: Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck4.symbols b/tests/baselines/reference/ES3For-ofTypeCheck4.symbols
new file mode 100644
index 0000000000000..31c862025b923
--- /dev/null
+++ b/tests/baselines/reference/ES3For-ofTypeCheck4.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck4.ts ===
+var union: string | string[];
+>union : Symbol(union, Decl(ES3For-ofTypeCheck4.ts, 0, 3))
+
+for (const v of union) { }
+>v : Symbol(v, Decl(ES3For-ofTypeCheck4.ts, 1, 10))
+>union : Symbol(union, Decl(ES3For-ofTypeCheck4.ts, 0, 3))
+
diff --git a/tests/baselines/reference/ES3For-ofTypeCheck4.types b/tests/baselines/reference/ES3For-ofTypeCheck4.types
new file mode 100644
index 0000000000000..bec14ff259f2c
--- /dev/null
+++ b/tests/baselines/reference/ES3For-ofTypeCheck4.types
@@ -0,0 +1,8 @@
+=== tests/cases/conformance/statements/for-ofStatements/ES3For-ofTypeCheck4.ts ===
+var union: string | string[];
+>union : string | string[]
+
+for (const v of union) { }
+>v : string
+>union : string | string[]
+
diff --git a/tests/baselines/reference/ES5For-of33.js b/tests/baselines/reference/ES5For-of33.js
index 729c37b8120d8..005fa89e97bbf 100644
--- a/tests/baselines/reference/ES5For-of33.js
+++ b/tests/baselines/reference/ES5For-of33.js
@@ -23,7 +23,7 @@ try {
 catch (e_1_1) { e_1 = { error: e_1_1 }; }
 finally {
     try {
-        if (_b && !_b.done && (_c = _a["return"])) _c.call(_a);
+        if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
     }
     finally { if (e_1) throw e_1.error; }
 }
diff --git a/tests/baselines/reference/ES5For-of33.sourcemap.txt b/tests/baselines/reference/ES5For-of33.sourcemap.txt
index 12dd243cf0ec9..25778906d4d1a 100644
--- a/tests/baselines/reference/ES5For-of33.sourcemap.txt
+++ b/tests/baselines/reference/ES5For-of33.sourcemap.txt
@@ -120,7 +120,7 @@ sourceFile:ES5For-of33.ts
 >>>catch (e_1_1) { e_1 = { error: e_1_1 }; }
 >>>finally {
 >>>    try {
->>>        if (_b && !_b.done && (_c = _a["return"])) _c.call(_a);
+>>>        if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
 >>>    }
 >>>    finally { if (e_1) throw e_1.error; }
 >>>}
diff --git a/tests/baselines/reference/ES5For-of34.js b/tests/baselines/reference/ES5For-of34.js
index 307a7505d09b7..adfdcf667d376 100644
--- a/tests/baselines/reference/ES5For-of34.js
+++ b/tests/baselines/reference/ES5For-of34.js
@@ -29,7 +29,7 @@ try {
 catch (e_1_1) { e_1 = { error: e_1_1 }; }
 finally {
     try {
-        if (_b && !_b.done && (_c = _a["return"])) _c.call(_a);
+        if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
     }
     finally { if (e_1) throw e_1.error; }
 }
diff --git a/tests/baselines/reference/ES5For-of34.sourcemap.txt b/tests/baselines/reference/ES5For-of34.sourcemap.txt
index 540d52cc58149..0a552ae5239e5 100644
--- a/tests/baselines/reference/ES5For-of34.sourcemap.txt
+++ b/tests/baselines/reference/ES5For-of34.sourcemap.txt
@@ -176,7 +176,7 @@ sourceFile:ES5For-of34.ts
 >>>catch (e_1_1) { e_1 = { error: e_1_1 }; }
 >>>finally {
 >>>    try {
->>>        if (_b && !_b.done && (_c = _a["return"])) _c.call(_a);
+>>>        if (_b && !_b.done && (_c = _a.return)) _c.call(_a);
 >>>    }
 >>>    finally { if (e_1) throw e_1.error; }
 >>>}
diff --git a/tests/baselines/reference/ES5For-of35.js b/tests/baselines/reference/ES5For-of35.js
index 597296cacaedd..f4bd6c9555bd6 100644
--- a/tests/baselines/reference/ES5For-of35.js
+++ b/tests/baselines/reference/ES5For-of35.js
@@ -25,7 +25,7 @@ try {
 catch (e_1_1) { e_1 = { error: e_1_1 }; }
 finally {
     try {
-        if (_b && !_b.done && (_f = _a["return"])) _f.call(_a);
+        if (_b && !_b.done && (_f = _a.return)) _f.call(_a);
     }
     finally { if (e_1) throw e_1.error; }
 }
diff --git a/tests/baselines/reference/ES5For-of35.sourcemap.txt b/tests/baselines/reference/ES5For-of35.sourcemap.txt
index 1961188da49f2..3acaf1f7ea3b1 100644
--- a/tests/baselines/reference/ES5For-of35.sourcemap.txt
+++ b/tests/baselines/reference/ES5For-of35.sourcemap.txt
@@ -134,7 +134,7 @@ sourceFile:ES5For-of35.ts
 >>>catch (e_1_1) { e_1 = { error: e_1_1 }; }
 >>>finally {
 >>>    try {
->>>        if (_b && !_b.done && (_f = _a["return"])) _f.call(_a);
+>>>        if (_b && !_b.done && (_f = _a.return)) _f.call(_a);
 >>>    }
 >>>    finally { if (e_1) throw e_1.error; }
 >>>}
diff --git a/tests/baselines/reference/ES5For-of36.js b/tests/baselines/reference/ES5For-of36.js
index fca89ee922b84..584efa125cd66 100644
--- a/tests/baselines/reference/ES5For-of36.js
+++ b/tests/baselines/reference/ES5For-of36.js
@@ -41,7 +41,7 @@ try {
 catch (e_1_1) { e_1 = { error: e_1_1 }; }
 finally {
     try {
-        if (_b && !_b.done && (_f = _a["return"])) _f.call(_a);
+        if (_b && !_b.done && (_f = _a.return)) _f.call(_a);
     }
     finally { if (e_1) throw e_1.error; }
 }
diff --git a/tests/baselines/reference/ES5For-of36.sourcemap.txt b/tests/baselines/reference/ES5For-of36.sourcemap.txt
index 4b16e02b3b10a..5eadf538311ee 100644
--- a/tests/baselines/reference/ES5For-of36.sourcemap.txt
+++ b/tests/baselines/reference/ES5For-of36.sourcemap.txt
@@ -150,7 +150,7 @@ sourceFile:ES5For-of36.ts
 >>>catch (e_1_1) { e_1 = { error: e_1_1 }; }
 >>>finally {
 >>>    try {
->>>        if (_b && !_b.done && (_f = _a["return"])) _f.call(_a);
+>>>        if (_b && !_b.done && (_f = _a.return)) _f.call(_a);
 >>>    }
 >>>    finally { if (e_1) throw e_1.error; }
 >>>}
diff --git a/tests/baselines/reference/MemberAccessorDeclaration15.errors.txt b/tests/baselines/reference/MemberAccessorDeclaration15.errors.txt
index 6ed8a2d29cdbe..d81b9169c1c1c 100644
--- a/tests/baselines/reference/MemberAccessorDeclaration15.errors.txt
+++ b/tests/baselines/reference/MemberAccessorDeclaration15.errors.txt
@@ -1,12 +1,9 @@
-tests/cases/compiler/MemberAccessorDeclaration15.ts(2,8): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/MemberAccessorDeclaration15.ts(2,12): error TS2369: A parameter property is only allowed in a constructor implementation.
 
 
-==== tests/cases/compiler/MemberAccessorDeclaration15.ts (2 errors) ====
+==== tests/cases/compiler/MemberAccessorDeclaration15.ts (1 errors) ====
     class C {
        set Foo(public a: number) { }
-           ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                ~~~~~~~~~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.js b/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.js
index a68614c0ed478..0c2043aa06933 100644
--- a/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.js
+++ b/tests/baselines/reference/TwoInternalModulesThatMergeEachWithExportedLocalVarsOfTheSameName.js
@@ -31,7 +31,7 @@ export module A {
 
 //// [part1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A;
 (function (A) {
     var Utils;
@@ -45,7 +45,7 @@ var A;
 })(A = exports.A || (exports.A = {}));
 //// [part2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A;
 (function (A) {
     // collision with 'Origin' var in other part of merged module
diff --git a/tests/baselines/reference/accessorWithES3.errors.txt b/tests/baselines/reference/accessorWithES3.errors.txt
deleted file mode 100644
index 0a2219d85a463..0000000000000
--- a/tests/baselines/reference/accessorWithES3.errors.txt
+++ /dev/null
@@ -1,35 +0,0 @@
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(10,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts(19,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts (4 errors) ====
-    // error to use accessors in ES3 mode
-    
-    class C {
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return 1;
-        }
-    }
-    
-    class D {
-        set x(v) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        }
-    }
-    
-    var x = {
-        get a() { return 1 }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    var y = {
-        set b(v) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/accessorWithES3.symbols b/tests/baselines/reference/accessorWithES3.symbols
new file mode 100644
index 0000000000000..5b1e0cae1b7a6
--- /dev/null
+++ b/tests/baselines/reference/accessorWithES3.symbols
@@ -0,0 +1,36 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts ===
+// error to use accessors in ES3 mode
+
+class C {
+>C : Symbol(C, Decl(accessorWithES3.ts, 0, 0))
+
+    get x() {
+>x : Symbol(C.x, Decl(accessorWithES3.ts, 2, 9))
+
+        return 1;
+    }
+}
+
+class D {
+>D : Symbol(D, Decl(accessorWithES3.ts, 6, 1))
+
+    set x(v) {
+>x : Symbol(D.x, Decl(accessorWithES3.ts, 8, 9))
+>v : Symbol(v, Decl(accessorWithES3.ts, 9, 10))
+    }
+}
+
+var x = {
+>x : Symbol(x, Decl(accessorWithES3.ts, 13, 3))
+
+    get a() { return 1 }
+>a : Symbol(a, Decl(accessorWithES3.ts, 13, 9))
+}
+
+var y = {
+>y : Symbol(y, Decl(accessorWithES3.ts, 17, 3))
+
+    set b(v) { }
+>b : Symbol(b, Decl(accessorWithES3.ts, 17, 9))
+>v : Symbol(v, Decl(accessorWithES3.ts, 18, 10))
+}
diff --git a/tests/baselines/reference/accessorWithES3.types b/tests/baselines/reference/accessorWithES3.types
new file mode 100644
index 0000000000000..b3c8353b96cfa
--- /dev/null
+++ b/tests/baselines/reference/accessorWithES3.types
@@ -0,0 +1,40 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorWithES3.ts ===
+// error to use accessors in ES3 mode
+
+class C {
+>C : C
+
+    get x() {
+>x : number
+
+        return 1;
+>1 : 1
+    }
+}
+
+class D {
+>D : D
+
+    set x(v) {
+>x : any
+>v : any
+    }
+}
+
+var x = {
+>x : { readonly a: number; }
+>{    get a() { return 1 }} : { readonly a: number; }
+
+    get a() { return 1 }
+>a : number
+>1 : 1
+}
+
+var y = {
+>y : { b: any; }
+>{    set b(v) { }} : { b: any; }
+
+    set b(v) { }
+>b : any
+>v : any
+}
diff --git a/tests/baselines/reference/accessorsAreNotContextuallyTyped.errors.txt b/tests/baselines/reference/accessorsAreNotContextuallyTyped.errors.txt
deleted file mode 100644
index 725ad30bd616c..0000000000000
--- a/tests/baselines/reference/accessorsAreNotContextuallyTyped.errors.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorsAreNotContextuallyTyped.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorsAreNotContextuallyTyped.ts(7,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorsAreNotContextuallyTyped.ts (2 errors) ====
-    // accessors are not contextually typed
-    
-    class C {
-        set x(v: (a: string) => string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        }
-    
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return (x: string) => "";
-        }
-    }
-    
-    var c: C;
-    var r = c.x(''); // string
\ No newline at end of file
diff --git a/tests/baselines/reference/accessorsAreNotContextuallyTyped.symbols b/tests/baselines/reference/accessorsAreNotContextuallyTyped.symbols
new file mode 100644
index 0000000000000..0589eb7f4a8cb
--- /dev/null
+++ b/tests/baselines/reference/accessorsAreNotContextuallyTyped.symbols
@@ -0,0 +1,30 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorsAreNotContextuallyTyped.ts ===
+// accessors are not contextually typed
+
+class C {
+>C : Symbol(C, Decl(accessorsAreNotContextuallyTyped.ts, 0, 0))
+
+    set x(v: (a: string) => string) {
+>x : Symbol(C.x, Decl(accessorsAreNotContextuallyTyped.ts, 2, 9), Decl(accessorsAreNotContextuallyTyped.ts, 4, 5))
+>v : Symbol(v, Decl(accessorsAreNotContextuallyTyped.ts, 3, 10))
+>a : Symbol(a, Decl(accessorsAreNotContextuallyTyped.ts, 3, 14))
+    }
+
+    get x() {
+>x : Symbol(C.x, Decl(accessorsAreNotContextuallyTyped.ts, 2, 9), Decl(accessorsAreNotContextuallyTyped.ts, 4, 5))
+
+        return (x: string) => "";
+>x : Symbol(x, Decl(accessorsAreNotContextuallyTyped.ts, 7, 16))
+    }
+}
+
+var c: C;
+>c : Symbol(c, Decl(accessorsAreNotContextuallyTyped.ts, 11, 3))
+>C : Symbol(C, Decl(accessorsAreNotContextuallyTyped.ts, 0, 0))
+
+var r = c.x(''); // string
+>r : Symbol(r, Decl(accessorsAreNotContextuallyTyped.ts, 12, 3))
+>c.x : Symbol(C.x, Decl(accessorsAreNotContextuallyTyped.ts, 2, 9), Decl(accessorsAreNotContextuallyTyped.ts, 4, 5))
+>c : Symbol(c, Decl(accessorsAreNotContextuallyTyped.ts, 11, 3))
+>x : Symbol(C.x, Decl(accessorsAreNotContextuallyTyped.ts, 2, 9), Decl(accessorsAreNotContextuallyTyped.ts, 4, 5))
+
diff --git a/tests/baselines/reference/accessorsAreNotContextuallyTyped.types b/tests/baselines/reference/accessorsAreNotContextuallyTyped.types
new file mode 100644
index 0000000000000..c48ad59372465
--- /dev/null
+++ b/tests/baselines/reference/accessorsAreNotContextuallyTyped.types
@@ -0,0 +1,34 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/accessorsAreNotContextuallyTyped.ts ===
+// accessors are not contextually typed
+
+class C {
+>C : C
+
+    set x(v: (a: string) => string) {
+>x : (a: string) => string
+>v : (a: string) => string
+>a : string
+    }
+
+    get x() {
+>x : (a: string) => string
+
+        return (x: string) => "";
+>(x: string) => "" : (x: string) => string
+>x : string
+>"" : ""
+    }
+}
+
+var c: C;
+>c : C
+>C : C
+
+var r = c.x(''); // string
+>r : string
+>c.x('') : string
+>c.x : (a: string) => string
+>c : C
+>x : (a: string) => string
+>'' : ""
+
diff --git a/tests/baselines/reference/accessorsEmit.errors.txt b/tests/baselines/reference/accessorsEmit.errors.txt
deleted file mode 100644
index 4d620f8cd8bc8..0000000000000
--- a/tests/baselines/reference/accessorsEmit.errors.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-tests/cases/compiler/accessorsEmit.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessorsEmit.ts(11,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/accessorsEmit.ts (2 errors) ====
-    class Result { }
-    
-    class Test {
-        get Property(): Result {
-            ~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x = 1;
-            return null;
-        }
-    }
-    
-    class Test2 {
-        get Property() {
-            ~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x = 1;
-            return null;
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/accessorsEmit.symbols b/tests/baselines/reference/accessorsEmit.symbols
new file mode 100644
index 0000000000000..119d81d369ab4
--- /dev/null
+++ b/tests/baselines/reference/accessorsEmit.symbols
@@ -0,0 +1,30 @@
+=== tests/cases/compiler/accessorsEmit.ts ===
+class Result { }
+>Result : Symbol(Result, Decl(accessorsEmit.ts, 0, 0))
+
+class Test {
+>Test : Symbol(Test, Decl(accessorsEmit.ts, 0, 16))
+
+    get Property(): Result {
+>Property : Symbol(Test.Property, Decl(accessorsEmit.ts, 2, 12))
+>Result : Symbol(Result, Decl(accessorsEmit.ts, 0, 0))
+
+        var x = 1;
+>x : Symbol(x, Decl(accessorsEmit.ts, 4, 11))
+
+        return null;
+    }
+}
+
+class Test2 {
+>Test2 : Symbol(Test2, Decl(accessorsEmit.ts, 7, 1))
+
+    get Property() {
+>Property : Symbol(Test2.Property, Decl(accessorsEmit.ts, 9, 13))
+
+        var x = 1;
+>x : Symbol(x, Decl(accessorsEmit.ts, 11, 11))
+
+        return null;
+    }
+}
diff --git a/tests/baselines/reference/accessorsEmit.types b/tests/baselines/reference/accessorsEmit.types
new file mode 100644
index 0000000000000..84759cefe877c
--- /dev/null
+++ b/tests/baselines/reference/accessorsEmit.types
@@ -0,0 +1,34 @@
+=== tests/cases/compiler/accessorsEmit.ts ===
+class Result { }
+>Result : Result
+
+class Test {
+>Test : Test
+
+    get Property(): Result {
+>Property : Result
+>Result : Result
+
+        var x = 1;
+>x : number
+>1 : 1
+
+        return null;
+>null : null
+    }
+}
+
+class Test2 {
+>Test2 : Test2
+
+    get Property() {
+>Property : any
+
+        var x = 1;
+>x : number
+>1 : 1
+
+        return null;
+>null : null
+    }
+}
diff --git a/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt b/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt
deleted file mode 100644
index cee1c8fd537ee..0000000000000
--- a/tests/baselines/reference/accessorsNotAllowedInES3.errors.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-tests/cases/compiler/accessorsNotAllowedInES3.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessorsNotAllowedInES3.ts(4,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/accessorsNotAllowedInES3.ts (2 errors) ====
-    class C {
-        get x(): number { return 1; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    var y = { get foo() { return 3; } };
-                  ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/accessorsNotAllowedInES3.symbols b/tests/baselines/reference/accessorsNotAllowedInES3.symbols
new file mode 100644
index 0000000000000..fc527434f3571
--- /dev/null
+++ b/tests/baselines/reference/accessorsNotAllowedInES3.symbols
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/accessorsNotAllowedInES3.ts ===
+class C {
+>C : Symbol(C, Decl(accessorsNotAllowedInES3.ts, 0, 0))
+
+    get x(): number { return 1; }
+>x : Symbol(C.x, Decl(accessorsNotAllowedInES3.ts, 0, 9))
+}
+var y = { get foo() { return 3; } };
+>y : Symbol(y, Decl(accessorsNotAllowedInES3.ts, 3, 3))
+>foo : Symbol(foo, Decl(accessorsNotAllowedInES3.ts, 3, 9))
+
diff --git a/tests/baselines/reference/accessorsNotAllowedInES3.types b/tests/baselines/reference/accessorsNotAllowedInES3.types
new file mode 100644
index 0000000000000..d83911586aadb
--- /dev/null
+++ b/tests/baselines/reference/accessorsNotAllowedInES3.types
@@ -0,0 +1,14 @@
+=== tests/cases/compiler/accessorsNotAllowedInES3.ts ===
+class C {
+>C : C
+
+    get x(): number { return 1; }
+>x : number
+>1 : 1
+}
+var y = { get foo() { return 3; } };
+>y : { readonly foo: number; }
+>{ get foo() { return 3; } } : { readonly foo: number; }
+>foo : number
+>3 : 3
+
diff --git a/tests/baselines/reference/accessors_spec_section-4.5_error-cases.errors.txt b/tests/baselines/reference/accessors_spec_section-4.5_error-cases.errors.txt
index 278de87e729db..24cf5e8ec48b7 100644
--- a/tests/baselines/reference/accessors_spec_section-4.5_error-cases.errors.txt
+++ b/tests/baselines/reference/accessors_spec_section-4.5_error-cases.errors.txt
@@ -1,52 +1,28 @@
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(3,48): error TS2322: Type '""' is not assignable to type 'number'.
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(5,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(5,47): error TS2322: Type '""' is not assignable to type 'number'.
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(8,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(9,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(9,52): error TS2322: Type '0' is not assignable to type 'string'.
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(11,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(11,51): error TS2322: Type '0' is not assignable to type 'string'.
-tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts(12,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts (12 errors) ====
+==== tests/cases/compiler/accessors_spec_section-4.5_error-cases.ts (4 errors) ====
     class LanguageSpec_section_4_5_error_cases {
         public set AnnotatedSetter_SetterFirst(a: number) { }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         public get AnnotatedSetter_SetterFirst() { return ""; }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                                                    ~~~~~~~~~~
 !!! error TS2322: Type '""' is not assignable to type 'number'.
     
         public get AnnotatedSetter_SetterLast() { return ""; }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                                                   ~~~~~~~~~~
 !!! error TS2322: Type '""' is not assignable to type 'number'.
         public set AnnotatedSetter_SetterLast(a: number) { }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         public get AnnotatedGetter_GetterFirst(): string { return ""; }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         public set AnnotatedGetter_GetterFirst(aStr) { aStr = 0; }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                                                        ~~~~
 !!! error TS2322: Type '0' is not assignable to type 'string'.
     
         public set AnnotatedGetter_GetterLast(aStr) { aStr = 0; }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                                                       ~~~~
 !!! error TS2322: Type '0' is not assignable to type 'string'.
         public get AnnotatedGetter_GetterLast(): string { return ""; }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/accessors_spec_section-4.5_inference.errors.txt b/tests/baselines/reference/accessors_spec_section-4.5_inference.errors.txt
deleted file mode 100644
index 9e7db776ff5cd..0000000000000
--- a/tests/baselines/reference/accessors_spec_section-4.5_inference.errors.txt
+++ /dev/null
@@ -1,63 +0,0 @@
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(7,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(9,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(10,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(13,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(14,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(16,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(17,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(19,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(20,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(22,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/accessors_spec_section-4.5_inference.ts(23,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/accessors_spec_section-4.5_inference.ts (12 errors) ====
-    class A { }
-    class B extends A { }
-    
-    class LanguageSpec_section_4_5_inference {
-    
-        public set InferredGetterFromSetterAnnotation(a: A) { }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public get InferredGetterFromSetterAnnotation() { return new B(); }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        public get InferredGetterFromSetterAnnotation_GetterFirst() { return new B(); }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public set InferredGetterFromSetterAnnotation_GetterFirst(a: A) { }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        
-    
-        public get InferredFromGetter() { return new B(); }
-                   ~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public set InferredFromGetter(a) { }
-                   ~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        public set InferredFromGetter_SetterFirst(a) { }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public get InferredFromGetter_SetterFirst() { return new B(); }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        public set InferredSetterFromGetterAnnotation(a) { }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public get InferredSetterFromGetterAnnotation() : A { return new B(); }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        public get InferredSetterFromGetterAnnotation_GetterFirst() : A { return new B(); }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public set InferredSetterFromGetterAnnotation_GetterFirst(a) { }
-                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/accessors_spec_section-4.5_inference.symbols b/tests/baselines/reference/accessors_spec_section-4.5_inference.symbols
new file mode 100644
index 0000000000000..de8781c42b0b5
--- /dev/null
+++ b/tests/baselines/reference/accessors_spec_section-4.5_inference.symbols
@@ -0,0 +1,64 @@
+=== tests/cases/compiler/accessors_spec_section-4.5_inference.ts ===
+class A { }
+>A : Symbol(A, Decl(accessors_spec_section-4.5_inference.ts, 0, 0))
+
+class B extends A { }
+>B : Symbol(B, Decl(accessors_spec_section-4.5_inference.ts, 0, 11))
+>A : Symbol(A, Decl(accessors_spec_section-4.5_inference.ts, 0, 0))
+
+class LanguageSpec_section_4_5_inference {
+>LanguageSpec_section_4_5_inference : Symbol(LanguageSpec_section_4_5_inference, Decl(accessors_spec_section-4.5_inference.ts, 1, 21))
+
+    public set InferredGetterFromSetterAnnotation(a: A) { }
+>InferredGetterFromSetterAnnotation : Symbol(LanguageSpec_section_4_5_inference.InferredGetterFromSetterAnnotation, Decl(accessors_spec_section-4.5_inference.ts, 3, 42), Decl(accessors_spec_section-4.5_inference.ts, 5, 59))
+>a : Symbol(a, Decl(accessors_spec_section-4.5_inference.ts, 5, 50))
+>A : Symbol(A, Decl(accessors_spec_section-4.5_inference.ts, 0, 0))
+
+    public get InferredGetterFromSetterAnnotation() { return new B(); }
+>InferredGetterFromSetterAnnotation : Symbol(LanguageSpec_section_4_5_inference.InferredGetterFromSetterAnnotation, Decl(accessors_spec_section-4.5_inference.ts, 3, 42), Decl(accessors_spec_section-4.5_inference.ts, 5, 59))
+>B : Symbol(B, Decl(accessors_spec_section-4.5_inference.ts, 0, 11))
+
+    public get InferredGetterFromSetterAnnotation_GetterFirst() { return new B(); }
+>InferredGetterFromSetterAnnotation_GetterFirst : Symbol(LanguageSpec_section_4_5_inference.InferredGetterFromSetterAnnotation_GetterFirst, Decl(accessors_spec_section-4.5_inference.ts, 6, 71), Decl(accessors_spec_section-4.5_inference.ts, 8, 83))
+>B : Symbol(B, Decl(accessors_spec_section-4.5_inference.ts, 0, 11))
+
+    public set InferredGetterFromSetterAnnotation_GetterFirst(a: A) { }
+>InferredGetterFromSetterAnnotation_GetterFirst : Symbol(LanguageSpec_section_4_5_inference.InferredGetterFromSetterAnnotation_GetterFirst, Decl(accessors_spec_section-4.5_inference.ts, 6, 71), Decl(accessors_spec_section-4.5_inference.ts, 8, 83))
+>a : Symbol(a, Decl(accessors_spec_section-4.5_inference.ts, 9, 62))
+>A : Symbol(A, Decl(accessors_spec_section-4.5_inference.ts, 0, 0))
+    
+
+    public get InferredFromGetter() { return new B(); }
+>InferredFromGetter : Symbol(LanguageSpec_section_4_5_inference.InferredFromGetter, Decl(accessors_spec_section-4.5_inference.ts, 9, 71), Decl(accessors_spec_section-4.5_inference.ts, 12, 55))
+>B : Symbol(B, Decl(accessors_spec_section-4.5_inference.ts, 0, 11))
+
+    public set InferredFromGetter(a) { }
+>InferredFromGetter : Symbol(LanguageSpec_section_4_5_inference.InferredFromGetter, Decl(accessors_spec_section-4.5_inference.ts, 9, 71), Decl(accessors_spec_section-4.5_inference.ts, 12, 55))
+>a : Symbol(a, Decl(accessors_spec_section-4.5_inference.ts, 13, 34))
+
+    public set InferredFromGetter_SetterFirst(a) { }
+>InferredFromGetter_SetterFirst : Symbol(LanguageSpec_section_4_5_inference.InferredFromGetter_SetterFirst, Decl(accessors_spec_section-4.5_inference.ts, 13, 40), Decl(accessors_spec_section-4.5_inference.ts, 15, 52))
+>a : Symbol(a, Decl(accessors_spec_section-4.5_inference.ts, 15, 46))
+
+    public get InferredFromGetter_SetterFirst() { return new B(); }
+>InferredFromGetter_SetterFirst : Symbol(LanguageSpec_section_4_5_inference.InferredFromGetter_SetterFirst, Decl(accessors_spec_section-4.5_inference.ts, 13, 40), Decl(accessors_spec_section-4.5_inference.ts, 15, 52))
+>B : Symbol(B, Decl(accessors_spec_section-4.5_inference.ts, 0, 11))
+
+    public set InferredSetterFromGetterAnnotation(a) { }
+>InferredSetterFromGetterAnnotation : Symbol(LanguageSpec_section_4_5_inference.InferredSetterFromGetterAnnotation, Decl(accessors_spec_section-4.5_inference.ts, 16, 67), Decl(accessors_spec_section-4.5_inference.ts, 18, 56))
+>a : Symbol(a, Decl(accessors_spec_section-4.5_inference.ts, 18, 50))
+
+    public get InferredSetterFromGetterAnnotation() : A { return new B(); }
+>InferredSetterFromGetterAnnotation : Symbol(LanguageSpec_section_4_5_inference.InferredSetterFromGetterAnnotation, Decl(accessors_spec_section-4.5_inference.ts, 16, 67), Decl(accessors_spec_section-4.5_inference.ts, 18, 56))
+>A : Symbol(A, Decl(accessors_spec_section-4.5_inference.ts, 0, 0))
+>B : Symbol(B, Decl(accessors_spec_section-4.5_inference.ts, 0, 11))
+
+    public get InferredSetterFromGetterAnnotation_GetterFirst() : A { return new B(); }
+>InferredSetterFromGetterAnnotation_GetterFirst : Symbol(LanguageSpec_section_4_5_inference.InferredSetterFromGetterAnnotation_GetterFirst, Decl(accessors_spec_section-4.5_inference.ts, 19, 75), Decl(accessors_spec_section-4.5_inference.ts, 21, 87))
+>A : Symbol(A, Decl(accessors_spec_section-4.5_inference.ts, 0, 0))
+>B : Symbol(B, Decl(accessors_spec_section-4.5_inference.ts, 0, 11))
+
+    public set InferredSetterFromGetterAnnotation_GetterFirst(a) { }
+>InferredSetterFromGetterAnnotation_GetterFirst : Symbol(LanguageSpec_section_4_5_inference.InferredSetterFromGetterAnnotation_GetterFirst, Decl(accessors_spec_section-4.5_inference.ts, 19, 75), Decl(accessors_spec_section-4.5_inference.ts, 21, 87))
+>a : Symbol(a, Decl(accessors_spec_section-4.5_inference.ts, 22, 62))
+}
diff --git a/tests/baselines/reference/accessors_spec_section-4.5_inference.types b/tests/baselines/reference/accessors_spec_section-4.5_inference.types
new file mode 100644
index 0000000000000..a1d96120634da
--- /dev/null
+++ b/tests/baselines/reference/accessors_spec_section-4.5_inference.types
@@ -0,0 +1,70 @@
+=== tests/cases/compiler/accessors_spec_section-4.5_inference.ts ===
+class A { }
+>A : A
+
+class B extends A { }
+>B : B
+>A : A
+
+class LanguageSpec_section_4_5_inference {
+>LanguageSpec_section_4_5_inference : LanguageSpec_section_4_5_inference
+
+    public set InferredGetterFromSetterAnnotation(a: A) { }
+>InferredGetterFromSetterAnnotation : A
+>a : A
+>A : A
+
+    public get InferredGetterFromSetterAnnotation() { return new B(); }
+>InferredGetterFromSetterAnnotation : A
+>new B() : B
+>B : typeof B
+
+    public get InferredGetterFromSetterAnnotation_GetterFirst() { return new B(); }
+>InferredGetterFromSetterAnnotation_GetterFirst : A
+>new B() : B
+>B : typeof B
+
+    public set InferredGetterFromSetterAnnotation_GetterFirst(a: A) { }
+>InferredGetterFromSetterAnnotation_GetterFirst : A
+>a : A
+>A : A
+    
+
+    public get InferredFromGetter() { return new B(); }
+>InferredFromGetter : B
+>new B() : B
+>B : typeof B
+
+    public set InferredFromGetter(a) { }
+>InferredFromGetter : B
+>a : B
+
+    public set InferredFromGetter_SetterFirst(a) { }
+>InferredFromGetter_SetterFirst : B
+>a : B
+
+    public get InferredFromGetter_SetterFirst() { return new B(); }
+>InferredFromGetter_SetterFirst : B
+>new B() : B
+>B : typeof B
+
+    public set InferredSetterFromGetterAnnotation(a) { }
+>InferredSetterFromGetterAnnotation : A
+>a : A
+
+    public get InferredSetterFromGetterAnnotation() : A { return new B(); }
+>InferredSetterFromGetterAnnotation : A
+>A : A
+>new B() : B
+>B : typeof B
+
+    public get InferredSetterFromGetterAnnotation_GetterFirst() : A { return new B(); }
+>InferredSetterFromGetterAnnotation_GetterFirst : A
+>A : A
+>new B() : B
+>B : typeof B
+
+    public set InferredSetterFromGetterAnnotation_GetterFirst(a) { }
+>InferredSetterFromGetterAnnotation_GetterFirst : A
+>a : A
+}
diff --git a/tests/baselines/reference/aliasAssignments.js b/tests/baselines/reference/aliasAssignments.js
index c21fe575e764f..f1c4d6f7514f7 100644
--- a/tests/baselines/reference/aliasAssignments.js
+++ b/tests/baselines/reference/aliasAssignments.js
@@ -15,7 +15,7 @@ y = moduleA; // should be error
 
 //// [aliasAssignments_moduleA.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var someClass = (function () {
     function someClass() {
     }
@@ -24,7 +24,7 @@ var someClass = (function () {
 exports.someClass = someClass;
 //// [aliasAssignments_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasAssignments_moduleA");
 var x = moduleA;
 x = 1; // Should be error
diff --git a/tests/baselines/reference/aliasOnMergedModuleInterface.js b/tests/baselines/reference/aliasOnMergedModuleInterface.js
index d3d312e53bb92..f1b78e4ef5a74 100644
--- a/tests/baselines/reference/aliasOnMergedModuleInterface.js
+++ b/tests/baselines/reference/aliasOnMergedModuleInterface.js
@@ -24,7 +24,7 @@ var x: foo.A = foo.bar("hello"); // foo.A should be ok but foo.bar should be err
 //// [aliasOnMergedModuleInterface_0.js]
 //// [aliasOnMergedModuleInterface_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var z;
 z.bar("hello"); // This should be ok
 var x = foo.bar("hello"); // foo.A should be ok but foo.bar should be error
diff --git a/tests/baselines/reference/aliasUsageInArray.js b/tests/baselines/reference/aliasUsageInArray.js
index 1ccbc958aec35..614944a1368c1 100644
--- a/tests/baselines/reference/aliasUsageInArray.js
+++ b/tests/baselines/reference/aliasUsageInArray.js
@@ -23,7 +23,7 @@ var xs2: typeof moduleA[] = [moduleA];
 
 //// [aliasUsageInArray_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -42,7 +42,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInArray_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -54,7 +54,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInArray_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsageInArray_moduleA");
 var xs = [moduleA];
 var xs2 = [moduleA];
diff --git a/tests/baselines/reference/aliasUsageInFunctionExpression.js b/tests/baselines/reference/aliasUsageInFunctionExpression.js
index de661ae803e30..7f53ace86fee5 100644
--- a/tests/baselines/reference/aliasUsageInFunctionExpression.js
+++ b/tests/baselines/reference/aliasUsageInFunctionExpression.js
@@ -22,7 +22,7 @@ f = (x) => moduleA;
 
 //// [aliasUsageInFunctionExpression_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -41,7 +41,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInFunctionExpression_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -53,7 +53,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInFunctionExpression_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsageInFunctionExpression_moduleA");
 var f = function (x) { return x; };
 f = function (x) { return moduleA; };
diff --git a/tests/baselines/reference/aliasUsageInGenericFunction.js b/tests/baselines/reference/aliasUsageInGenericFunction.js
index 2ca49ea8dfc33..d4d92663d4bee 100644
--- a/tests/baselines/reference/aliasUsageInGenericFunction.js
+++ b/tests/baselines/reference/aliasUsageInGenericFunction.js
@@ -26,7 +26,7 @@ var r2 = foo({ a: <IHasVisualizationModel>null });
 
 //// [aliasUsageInGenericFunction_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -45,7 +45,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInGenericFunction_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -57,7 +57,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInGenericFunction_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsageInGenericFunction_moduleA");
 function foo(x) {
     return x;
diff --git a/tests/baselines/reference/aliasUsageInIndexerOfClass.js b/tests/baselines/reference/aliasUsageInIndexerOfClass.js
index 81084b8b92fa6..a32e046571f92 100644
--- a/tests/baselines/reference/aliasUsageInIndexerOfClass.js
+++ b/tests/baselines/reference/aliasUsageInIndexerOfClass.js
@@ -28,7 +28,7 @@ class N2 {
 
 //// [aliasUsageInIndexerOfClass_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -47,7 +47,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInIndexerOfClass_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -59,7 +59,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInIndexerOfClass_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsageInIndexerOfClass_moduleA");
 var N = (function () {
     function N() {
diff --git a/tests/baselines/reference/aliasUsageInObjectLiteral.js b/tests/baselines/reference/aliasUsageInObjectLiteral.js
index 6f4adfae58c98..e1f9e4936da73 100644
--- a/tests/baselines/reference/aliasUsageInObjectLiteral.js
+++ b/tests/baselines/reference/aliasUsageInObjectLiteral.js
@@ -23,7 +23,7 @@ var c: { y: { z: IHasVisualizationModel } } = { y: { z: moduleA } };
 
 //// [aliasUsageInObjectLiteral_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -42,7 +42,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInObjectLiteral_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -54,7 +54,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInObjectLiteral_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsageInObjectLiteral_moduleA");
 var a = { x: moduleA };
 var b = { x: moduleA };
diff --git a/tests/baselines/reference/aliasUsageInOrExpression.js b/tests/baselines/reference/aliasUsageInOrExpression.js
index 178ccaaee230d..0aa50535b95bc 100644
--- a/tests/baselines/reference/aliasUsageInOrExpression.js
+++ b/tests/baselines/reference/aliasUsageInOrExpression.js
@@ -26,7 +26,7 @@ var f: { x: IHasVisualizationModel } = <{ x: IHasVisualizationModel }>null ? { x
 
 //// [aliasUsageInOrExpression_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -45,7 +45,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInOrExpression_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -57,7 +57,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInOrExpression_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsageInOrExpression_moduleA");
 var i;
 var d1 = i || moduleA;
diff --git a/tests/baselines/reference/aliasUsageInTypeArgumentOfExtendsClause.js b/tests/baselines/reference/aliasUsageInTypeArgumentOfExtendsClause.js
index 5ac28396fba69..bdd20fa3717f7 100644
--- a/tests/baselines/reference/aliasUsageInTypeArgumentOfExtendsClause.js
+++ b/tests/baselines/reference/aliasUsageInTypeArgumentOfExtendsClause.js
@@ -26,7 +26,7 @@ class D extends C<IHasVisualizationModel> {
 
 //// [aliasUsageInTypeArgumentOfExtendsClause_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -45,7 +45,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInTypeArgumentOfExtendsClause_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -67,7 +67,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./aliasUsageInTypeArgumentOfExtendsClause_moduleA");
 var C = (function () {
     function C() {
diff --git a/tests/baselines/reference/aliasUsageInVarAssignment.js b/tests/baselines/reference/aliasUsageInVarAssignment.js
index a85d61fd34cad..3e0dac0199413 100644
--- a/tests/baselines/reference/aliasUsageInVarAssignment.js
+++ b/tests/baselines/reference/aliasUsageInVarAssignment.js
@@ -22,7 +22,7 @@ var m: typeof moduleA = i;
 
 //// [aliasUsageInVarAssignment_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -41,7 +41,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./aliasUsageInVarAssignment_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -53,6 +53,6 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [aliasUsageInVarAssignment_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var i;
 var m = i;
diff --git a/tests/baselines/reference/aliasUsedAsNameValue.js b/tests/baselines/reference/aliasUsedAsNameValue.js
index 168567eb80fac..a51a4fef79e46 100644
--- a/tests/baselines/reference/aliasUsedAsNameValue.js
+++ b/tests/baselines/reference/aliasUsedAsNameValue.js
@@ -20,15 +20,15 @@ export var a = function () {
 
 //// [aliasUsedAsNameValue_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [aliasUsedAsNameValue_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function b(a) { return null; }
 exports.b = b;
 //// [aliasUsedAsNameValue_2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='aliasUsedAsNameValue_0.ts' />
 ///<reference path='aliasUsedAsNameValue_1.ts' />
 var mod = require("./aliasUsedAsNameValue_0");
diff --git a/tests/baselines/reference/aliasWithInterfaceExportAssignmentUsedInVarInitializer.js b/tests/baselines/reference/aliasWithInterfaceExportAssignmentUsedInVarInitializer.js
index 58565bbb91648..c111c6799120c 100644
--- a/tests/baselines/reference/aliasWithInterfaceExportAssignmentUsedInVarInitializer.js
+++ b/tests/baselines/reference/aliasWithInterfaceExportAssignmentUsedInVarInitializer.js
@@ -12,8 +12,8 @@ var d = b.q3;
 
 //// [aliasWithInterfaceExportAssignmentUsedInVarInitializer_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [aliasWithInterfaceExportAssignmentUsedInVarInitializer_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = b.q3;
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports1.js b/tests/baselines/reference/allowSyntheticDefaultImports1.js
index a659eb60151c3..d73f750f559de 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports1.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports1.js
@@ -12,7 +12,7 @@ export class Foo {
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = (function () {
     function Foo() {
     }
@@ -21,6 +21,6 @@ var Foo = (function () {
 exports.Foo = Foo;
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var b_1 = require("./b");
-exports.x = new b_1["default"].Foo();
+exports.x = new b_1.default.Foo();
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports10.js b/tests/baselines/reference/allowSyntheticDefaultImports10.js
index ad3ed5715c08f..13ee18518c4ec 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports10.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports10.js
@@ -12,7 +12,7 @@ Foo.default.default.foo();
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = require("./b");
-Foo["default"].bar();
-Foo["default"]["default"].foo();
+Foo.default.bar();
+Foo.default.default.foo();
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports2.js b/tests/baselines/reference/allowSyntheticDefaultImports2.js
index 93c13617e4a66..22aa601eaba6d 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports2.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports2.js
@@ -38,7 +38,7 @@ System.register(["./b"], function (exports_1, context_1) {
             }
         ],
         execute: function () {
-            exports_1("x", x = new b_1["default"].Foo());
+            exports_1("x", x = new b_1.default.Foo());
         }
     };
 });
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports3.js b/tests/baselines/reference/allowSyntheticDefaultImports3.js
index 74b1dcb776dec..e0224d8f54052 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports3.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports3.js
@@ -39,7 +39,7 @@ System.register(["./b"], function (exports_1, context_1) {
             }
         ],
         execute: function () {
-            exports_1("x", x = new b_1["default"].Foo());
+            exports_1("x", x = new b_1.default.Foo());
         }
     };
 });
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports4.js b/tests/baselines/reference/allowSyntheticDefaultImports4.js
index 762c032b81287..c0b9c5784de01 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports4.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports4.js
@@ -13,6 +13,6 @@ export var x = new Foo();
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var b_1 = require("./b");
-exports.x = new b_1["default"]();
+exports.x = new b_1.default();
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports5.js b/tests/baselines/reference/allowSyntheticDefaultImports5.js
index 765d11408642a..1e4c8f9d7ec4b 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports5.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports5.js
@@ -23,7 +23,7 @@ System.register(["./b"], function (exports_1, context_1) {
             }
         ],
         execute: function () {
-            exports_1("x", x = new b_1["default"]());
+            exports_1("x", x = new b_1.default());
         }
     };
 });
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports6.js b/tests/baselines/reference/allowSyntheticDefaultImports6.js
index 9ae7acae9194e..5884f52d01710 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports6.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports6.js
@@ -23,7 +23,7 @@ System.register(["./b"], function (exports_1, context_1) {
             }
         ],
         execute: function () {
-            exports_1("x", x = new b_1["default"]());
+            exports_1("x", x = new b_1.default());
         }
     };
 });
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports7.js b/tests/baselines/reference/allowSyntheticDefaultImports7.js
index 6d0ea5b3be07a..06c4160b6e850 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports7.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports7.js
@@ -22,8 +22,8 @@ System.register(["./b"], function (exports_1, context_1) {
             }
         ],
         execute: function () {
-            b_1["default"].bar();
-            b_1["default"].foo();
+            b_1.default.bar();
+            b_1.default.foo();
         }
     };
 });
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports8.js b/tests/baselines/reference/allowSyntheticDefaultImports8.js
index 5a77e51e6a241..b9d14c718c838 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports8.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports8.js
@@ -22,8 +22,8 @@ System.register(["./b"], function (exports_1, context_1) {
             }
         ],
         execute: function () {
-            b_1["default"].bar();
-            b_1["default"].foo();
+            b_1.default.bar();
+            b_1.default.foo();
         }
     };
 });
diff --git a/tests/baselines/reference/allowSyntheticDefaultImports9.js b/tests/baselines/reference/allowSyntheticDefaultImports9.js
index 2d8ab463d83f7..f79bd76c192b9 100644
--- a/tests/baselines/reference/allowSyntheticDefaultImports9.js
+++ b/tests/baselines/reference/allowSyntheticDefaultImports9.js
@@ -12,7 +12,7 @@ Foo.foo();
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var b_1 = require("./b");
-b_1["default"].bar();
-b_1["default"].foo();
+b_1.default.bar();
+b_1.default.foo();
diff --git a/tests/baselines/reference/alwaysStrictModule4.js b/tests/baselines/reference/alwaysStrictModule4.js
index 026570293be82..6fbdc43af0067 100644
--- a/tests/baselines/reference/alwaysStrictModule4.js
+++ b/tests/baselines/reference/alwaysStrictModule4.js
@@ -4,6 +4,6 @@ export const a = 1
 
 //// [alwaysStrictModule4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Module commonjs
 exports.a = 1;
diff --git a/tests/baselines/reference/ambientDeclarationsExternal.js b/tests/baselines/reference/ambientDeclarationsExternal.js
index fb5315864678b..02cac740f74b3 100644
--- a/tests/baselines/reference/ambientDeclarationsExternal.js
+++ b/tests/baselines/reference/ambientDeclarationsExternal.js
@@ -27,7 +27,7 @@ var n: number;
 // Ambient external import declaration referencing ambient external module using top level module name 
 //// [consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Ambient external module members are always exported with or without export keyword when module lacks export assignment
 var imp3 = require("equ2");
 var n = imp3.x;
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.js b/tests/baselines/reference/ambientDeclarationsPatterns.js
index 84088d11d4eb4..4e1cfccbdd0ab 100644
--- a/tests/baselines/reference/ambientDeclarationsPatterns.js
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.js
@@ -34,7 +34,7 @@ foo(fileText);
 
 //// [user.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path="declarations.d.ts" />
 var foobarbaz_1 = require("foobarbaz");
 foobarbaz_1.foo(foobarbaz_1.baz);
@@ -42,4 +42,4 @@ var foosball_1 = require("foosball");
 foobarbaz_1.foo(foosball_1.foos);
 // Works with relative file name
 var file_text_1 = require("./file!text");
-foobarbaz_1.foo(file_text_1["default"]);
+foobarbaz_1.foo(file_text_1.default);
diff --git a/tests/baselines/reference/ambientExternalModuleInsideNonAmbientExternalModule.js b/tests/baselines/reference/ambientExternalModuleInsideNonAmbientExternalModule.js
index 401af4b5214b1..0a53a3c4567c6 100644
--- a/tests/baselines/reference/ambientExternalModuleInsideNonAmbientExternalModule.js
+++ b/tests/baselines/reference/ambientExternalModuleInsideNonAmbientExternalModule.js
@@ -4,5 +4,5 @@ export declare module "M" { }
 //// [ambientExternalModuleInsideNonAmbientExternalModule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/ambientExternalModuleMerging.js b/tests/baselines/reference/ambientExternalModuleMerging.js
index 6c2de62c90a66..9dffd75fc8c50 100644
--- a/tests/baselines/reference/ambientExternalModuleMerging.js
+++ b/tests/baselines/reference/ambientExternalModuleMerging.js
@@ -19,7 +19,7 @@ declare module "M" {
 //// [ambientExternalModuleMerging_use.js]
 define(["require", "exports", "M"], function (require, exports, M) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // Should be strings
     var x = M.x;
     var y = M.y;
diff --git a/tests/baselines/reference/ambientExternalModuleWithInternalImportDeclaration.js b/tests/baselines/reference/ambientExternalModuleWithInternalImportDeclaration.js
index 9efd9e4ada9fc..27e999b59f559 100644
--- a/tests/baselines/reference/ambientExternalModuleWithInternalImportDeclaration.js
+++ b/tests/baselines/reference/ambientExternalModuleWithInternalImportDeclaration.js
@@ -22,6 +22,6 @@ var c = new A();
 //// [ambientExternalModuleWithInternalImportDeclaration_1.js]
 define(["require", "exports", "M"], function (require, exports, A) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c = new A();
 });
diff --git a/tests/baselines/reference/ambientExternalModuleWithoutInternalImportDeclaration.js b/tests/baselines/reference/ambientExternalModuleWithoutInternalImportDeclaration.js
index 98d3d46912aae..fba6dff144395 100644
--- a/tests/baselines/reference/ambientExternalModuleWithoutInternalImportDeclaration.js
+++ b/tests/baselines/reference/ambientExternalModuleWithoutInternalImportDeclaration.js
@@ -21,6 +21,6 @@ var c = new A();
 //// [ambientExternalModuleWithoutInternalImportDeclaration_1.js]
 define(["require", "exports", "M"], function (require, exports, A) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c = new A();
 });
diff --git a/tests/baselines/reference/ambientInsideNonAmbientExternalModule.js b/tests/baselines/reference/ambientInsideNonAmbientExternalModule.js
index 689cd6a12420b..f4ddf43614c39 100644
--- a/tests/baselines/reference/ambientInsideNonAmbientExternalModule.js
+++ b/tests/baselines/reference/ambientInsideNonAmbientExternalModule.js
@@ -8,5 +8,5 @@ export declare module M { }
 //// [ambientInsideNonAmbientExternalModule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/ambientNameRestrictions.js b/tests/baselines/reference/ambientNameRestrictions.js
index b35f1241b2d15..9a7971219825f 100644
--- a/tests/baselines/reference/ambientNameRestrictions.js
+++ b/tests/baselines/reference/ambientNameRestrictions.js
@@ -6,4 +6,4 @@ export declare namespace Foo {
 
 //// [ambientNameRestrictions.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/ambientShorthand.js b/tests/baselines/reference/ambientShorthand.js
index a7513e7eb585a..1fd5edcb856eb 100644
--- a/tests/baselines/reference/ambientShorthand.js
+++ b/tests/baselines/reference/ambientShorthand.js
@@ -15,9 +15,9 @@ foo(bar, baz, boom);
 
 //// [user.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path="declarations.d.ts"/>
 var jquery_1 = require("jquery");
 var baz = require("fs");
 var boom = require("jquery");
-jquery_1["default"](jquery_1.bar, baz, boom);
+jquery_1.default(jquery_1.bar, baz, boom);
diff --git a/tests/baselines/reference/ambientShorthand_duplicate.js b/tests/baselines/reference/ambientShorthand_duplicate.js
index 08d03c83ed0e6..99c490003275c 100644
--- a/tests/baselines/reference/ambientShorthand_duplicate.js
+++ b/tests/baselines/reference/ambientShorthand_duplicate.js
@@ -14,4 +14,4 @@ import foo from "foo";
 
 //// [user.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/ambientShorthand_merging.js b/tests/baselines/reference/ambientShorthand_merging.js
index 15714a48997e8..b8a134c179606 100644
--- a/tests/baselines/reference/ambientShorthand_merging.js
+++ b/tests/baselines/reference/ambientShorthand_merging.js
@@ -16,4 +16,4 @@ import foo, {bar} from "foo";
 
 //// [user.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/ambientShorthand_reExport.js b/tests/baselines/reference/ambientShorthand_reExport.js
index 6842d0f75541f..6a52361c94f41 100644
--- a/tests/baselines/reference/ambientShorthand_reExport.js
+++ b/tests/baselines/reference/ambientShorthand_reExport.js
@@ -18,7 +18,7 @@ x($);
 
 //// [reExportX.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var jquery_1 = require("jquery");
 exports.x = jquery_1.x;
 //// [reExportAll.js]
@@ -26,11 +26,11 @@ exports.x = jquery_1.x;
 function __export(m) {
     for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
 }
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 __export(require("jquery"));
 //// [reExportUser.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var reExportX_1 = require("./reExportX");
 var $ = require("./reExportAll");
 // '$' is not callable, it is an object.
diff --git a/tests/baselines/reference/amdDependencyComment1.js b/tests/baselines/reference/amdDependencyComment1.js
index a11b65ff53fd8..7951ae9d5a9bb 100644
--- a/tests/baselines/reference/amdDependencyComment1.js
+++ b/tests/baselines/reference/amdDependencyComment1.js
@@ -7,6 +7,6 @@ m1.f();
 //// [amdDependencyComment1.js]
 "use strict";
 ///<amd-dependency path='bar'/>
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m2");
 m1.f();
diff --git a/tests/baselines/reference/amdDependencyComment2.js b/tests/baselines/reference/amdDependencyComment2.js
index 222093cf15933..c6d5f4d1b5376 100644
--- a/tests/baselines/reference/amdDependencyComment2.js
+++ b/tests/baselines/reference/amdDependencyComment2.js
@@ -8,6 +8,6 @@ m1.f();
 ///<amd-dependency path='bar'/>
 define(["require", "exports", "m2", "bar"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     m1.f();
 });
diff --git a/tests/baselines/reference/amdDependencyCommentName1.js b/tests/baselines/reference/amdDependencyCommentName1.js
index 5065ed12ab4e2..f69808c6759c4 100644
--- a/tests/baselines/reference/amdDependencyCommentName1.js
+++ b/tests/baselines/reference/amdDependencyCommentName1.js
@@ -7,6 +7,6 @@ m1.f();
 //// [amdDependencyCommentName1.js]
 "use strict";
 ///<amd-dependency path='bar' name='b'/>
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m2");
 m1.f();
diff --git a/tests/baselines/reference/amdDependencyCommentName2.js b/tests/baselines/reference/amdDependencyCommentName2.js
index c39902371a0cf..fcbbc4c4612de 100644
--- a/tests/baselines/reference/amdDependencyCommentName2.js
+++ b/tests/baselines/reference/amdDependencyCommentName2.js
@@ -8,6 +8,6 @@ m1.f();
 ///<amd-dependency path='bar' name='b'/>
 define(["require", "exports", "bar", "m2"], function (require, exports, b, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     m1.f();
 });
diff --git a/tests/baselines/reference/amdDependencyCommentName3.js b/tests/baselines/reference/amdDependencyCommentName3.js
index f842ad0cbf8c5..72d8244706443 100644
--- a/tests/baselines/reference/amdDependencyCommentName3.js
+++ b/tests/baselines/reference/amdDependencyCommentName3.js
@@ -12,6 +12,6 @@ m1.f();
 ///<amd-dependency path='goo' name='c'/>
 define(["require", "exports", "bar", "goo", "m2", "foo"], function (require, exports, b, c, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     m1.f();
 });
diff --git a/tests/baselines/reference/amdDependencyCommentName4.js b/tests/baselines/reference/amdDependencyCommentName4.js
index 6542aa14fa299..b050b58aa8e49 100644
--- a/tests/baselines/reference/amdDependencyCommentName4.js
+++ b/tests/baselines/reference/amdDependencyCommentName4.js
@@ -27,9 +27,9 @@ import "unaliasedModule2";
 ///<amd-dependency path='unaliasedModule4'/>
 define(["require", "exports", "aliasedModule5", "aliasedModule6", "aliasedModule1", "aliasedModule2", "aliasedModule3", "aliasedModule4", "unaliasedModule3", "unaliasedModule4", "unaliasedModule1", "unaliasedModule2"], function (require, exports, n1, n2, r1, aliasedModule2_1, aliasedModule3_1, ns) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     r1;
     aliasedModule2_1.p1;
-    aliasedModule3_1["default"];
+    aliasedModule3_1.default;
     ns;
 });
diff --git a/tests/baselines/reference/amdImportAsPrimaryExpression.js b/tests/baselines/reference/amdImportAsPrimaryExpression.js
index 69d3e095dc7e3..012b5ea94e0ca 100644
--- a/tests/baselines/reference/amdImportAsPrimaryExpression.js
+++ b/tests/baselines/reference/amdImportAsPrimaryExpression.js
@@ -15,7 +15,7 @@ if(foo.E1.A === 0){
 //// [foo_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var E1;
     (function (E1) {
         E1[E1["A"] = 0] = "A";
@@ -26,7 +26,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     if (foo.E1.A === 0) {
         // Should cause runtime import - interesting optimization possibility, as gets inlined to 0.
     }
diff --git a/tests/baselines/reference/amdImportNotAsPrimaryExpression.js b/tests/baselines/reference/amdImportNotAsPrimaryExpression.js
index 651ae7a6d3945..01b7b0b2630d5 100644
--- a/tests/baselines/reference/amdImportNotAsPrimaryExpression.js
+++ b/tests/baselines/reference/amdImportNotAsPrimaryExpression.js
@@ -34,7 +34,7 @@ var e: number = <foo.E1>0;
 //// [foo_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C1 = (function () {
         function C1() {
             this.m1 = 42;
@@ -53,7 +53,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var i;
     var x = {};
     var y = false;
diff --git a/tests/baselines/reference/anyIdenticalToItself.errors.txt b/tests/baselines/reference/anyIdenticalToItself.errors.txt
index bcd3b52daef1d..09ace6d3909f7 100644
--- a/tests/baselines/reference/anyIdenticalToItself.errors.txt
+++ b/tests/baselines/reference/anyIdenticalToItself.errors.txt
@@ -1,9 +1,7 @@
 tests/cases/compiler/anyIdenticalToItself.ts(1,10): error TS2394: Overload signature is not compatible with function implementation.
-tests/cases/compiler/anyIdenticalToItself.ts(6,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/anyIdenticalToItself.ts(10,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/anyIdenticalToItself.ts (3 errors) ====
+==== tests/cases/compiler/anyIdenticalToItself.ts (1 errors) ====
     function foo(x: any);
              ~~~
 !!! error TS2394: Overload signature is not compatible with function implementation.
@@ -12,13 +10,9 @@ tests/cases/compiler/anyIdenticalToItself.ts(10,9): error TS1056: Accessors are
     
     class C {
         get X(): any {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var y: any;
             return y;
         }
         set X(v: any) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         }
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/asOperator4.js b/tests/baselines/reference/asOperator4.js
index d0eac5bb1137b..f6ee97fa17e0b 100644
--- a/tests/baselines/reference/asOperator4.js
+++ b/tests/baselines/reference/asOperator4.js
@@ -13,12 +13,12 @@ import { foo } from './foo';
 
 //// [foo.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() { }
 exports.foo = foo;
 //// [bar.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo_1 = require("./foo");
 // These should emit identically
 foo_1.foo;
diff --git a/tests/baselines/reference/assignmentCompatBug3.errors.txt b/tests/baselines/reference/assignmentCompatBug3.errors.txt
deleted file mode 100644
index fe7ff5bbddcfd..0000000000000
--- a/tests/baselines/reference/assignmentCompatBug3.errors.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-tests/cases/compiler/assignmentCompatBug3.ts(3,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/assignmentCompatBug3.ts(4,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/assignmentCompatBug3.ts(14,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/assignmentCompatBug3.ts (3 errors) ====
-    function makePoint(x: number, y: number) {
-        return {
-            get x() { return x;}, // shouldn't be "void"
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            get y() { return y;}, // shouldn't be "void"
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            //x: "yo",
-            //y: "boo",
-            dist: function () {
-    			return Math.sqrt(x*x+y*y); // shouldn't be picking up "x" and "y" from the object lit
-    		}
-    	}
-    }
-    
-    class C {
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return 0;
-        }
-    }
-    
-    function foo(test: string) { }
-    
-    var x: any;
-    var y: any;
-    
-    foo(x);
-    foo(x + y);
\ No newline at end of file
diff --git a/tests/baselines/reference/assignmentCompatBug3.symbols b/tests/baselines/reference/assignmentCompatBug3.symbols
new file mode 100644
index 0000000000000..6545195d4b8ec
--- /dev/null
+++ b/tests/baselines/reference/assignmentCompatBug3.symbols
@@ -0,0 +1,61 @@
+=== tests/cases/compiler/assignmentCompatBug3.ts ===
+function makePoint(x: number, y: number) {
+>makePoint : Symbol(makePoint, Decl(assignmentCompatBug3.ts, 0, 0))
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 0, 19))
+>y : Symbol(y, Decl(assignmentCompatBug3.ts, 0, 29))
+
+    return {
+        get x() { return x;}, // shouldn't be "void"
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 1, 12))
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 0, 19))
+
+        get y() { return y;}, // shouldn't be "void"
+>y : Symbol(y, Decl(assignmentCompatBug3.ts, 2, 29))
+>y : Symbol(y, Decl(assignmentCompatBug3.ts, 0, 29))
+
+        //x: "yo",
+        //y: "boo",
+        dist: function () {
+>dist : Symbol(dist, Decl(assignmentCompatBug3.ts, 3, 29))
+
+			return Math.sqrt(x*x+y*y); // shouldn't be picking up "x" and "y" from the object lit
+>Math.sqrt : Symbol(Math.sqrt, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>sqrt : Symbol(Math.sqrt, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 0, 19))
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 0, 19))
+>y : Symbol(y, Decl(assignmentCompatBug3.ts, 0, 29))
+>y : Symbol(y, Decl(assignmentCompatBug3.ts, 0, 29))
+		}
+	}
+}
+
+class C {
+>C : Symbol(C, Decl(assignmentCompatBug3.ts, 10, 1))
+
+    get x() {
+>x : Symbol(C.x, Decl(assignmentCompatBug3.ts, 12, 9))
+
+        return 0;
+    }
+}
+
+function foo(test: string) { }
+>foo : Symbol(foo, Decl(assignmentCompatBug3.ts, 16, 1))
+>test : Symbol(test, Decl(assignmentCompatBug3.ts, 18, 13))
+
+var x: any;
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 20, 3))
+
+var y: any;
+>y : Symbol(y, Decl(assignmentCompatBug3.ts, 21, 3))
+
+foo(x);
+>foo : Symbol(foo, Decl(assignmentCompatBug3.ts, 16, 1))
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 20, 3))
+
+foo(x + y);
+>foo : Symbol(foo, Decl(assignmentCompatBug3.ts, 16, 1))
+>x : Symbol(x, Decl(assignmentCompatBug3.ts, 20, 3))
+>y : Symbol(y, Decl(assignmentCompatBug3.ts, 21, 3))
+
diff --git a/tests/baselines/reference/assignmentCompatBug3.types b/tests/baselines/reference/assignmentCompatBug3.types
new file mode 100644
index 0000000000000..1c4581e2f196f
--- /dev/null
+++ b/tests/baselines/reference/assignmentCompatBug3.types
@@ -0,0 +1,72 @@
+=== tests/cases/compiler/assignmentCompatBug3.ts ===
+function makePoint(x: number, y: number) {
+>makePoint : (x: number, y: number) => { readonly x: number; readonly y: number; dist: () => number; }
+>x : number
+>y : number
+
+    return {
+>{        get x() { return x;}, // shouldn't be "void"        get y() { return y;}, // shouldn't be "void"        //x: "yo",        //y: "boo",        dist: function () {			return Math.sqrt(x*x+y*y); // shouldn't be picking up "x" and "y" from the object lit		}	} : { readonly x: number; readonly y: number; dist: () => number; }
+
+        get x() { return x;}, // shouldn't be "void"
+>x : number
+>x : number
+
+        get y() { return y;}, // shouldn't be "void"
+>y : number
+>y : number
+
+        //x: "yo",
+        //y: "boo",
+        dist: function () {
+>dist : () => number
+>function () {			return Math.sqrt(x*x+y*y); // shouldn't be picking up "x" and "y" from the object lit		} : () => number
+
+			return Math.sqrt(x*x+y*y); // shouldn't be picking up "x" and "y" from the object lit
+>Math.sqrt(x*x+y*y) : number
+>Math.sqrt : (x: number) => number
+>Math : Math
+>sqrt : (x: number) => number
+>x*x+y*y : number
+>x*x : number
+>x : number
+>x : number
+>y*y : number
+>y : number
+>y : number
+		}
+	}
+}
+
+class C {
+>C : C
+
+    get x() {
+>x : number
+
+        return 0;
+>0 : 0
+    }
+}
+
+function foo(test: string) { }
+>foo : (test: string) => void
+>test : string
+
+var x: any;
+>x : any
+
+var y: any;
+>y : any
+
+foo(x);
+>foo(x) : void
+>foo : (test: string) => void
+>x : any
+
+foo(x + y);
+>foo(x + y) : void
+>foo : (test: string) => void
+>x + y : any
+>x : any
+>y : any
+
diff --git a/tests/baselines/reference/augmentExportEquals1.js b/tests/baselines/reference/augmentExportEquals1.js
index 99a6e2e4bb00d..4fa10b893d7e1 100644
--- a/tests/baselines/reference/augmentExportEquals1.js
+++ b/tests/baselines/reference/augmentExportEquals1.js
@@ -27,11 +27,11 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file3.js]
 define(["require", "exports", "./file2"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a; // should not work
 });
diff --git a/tests/baselines/reference/augmentExportEquals1_1.js b/tests/baselines/reference/augmentExportEquals1_1.js
index 780043c81ca17..a640a212e8f6c 100644
--- a/tests/baselines/reference/augmentExportEquals1_1.js
+++ b/tests/baselines/reference/augmentExportEquals1_1.js
@@ -24,11 +24,11 @@ let a: x.A; // should not work
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file3.js]
 define(["require", "exports", "file2"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a; // should not work
 });
diff --git a/tests/baselines/reference/augmentExportEquals2.js b/tests/baselines/reference/augmentExportEquals2.js
index 8ce1bb9010157..7f3a825133794 100644
--- a/tests/baselines/reference/augmentExportEquals2.js
+++ b/tests/baselines/reference/augmentExportEquals2.js
@@ -26,11 +26,11 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file3.js]
 define(["require", "exports", "./file2"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a; // should not work
 });
diff --git a/tests/baselines/reference/augmentExportEquals2_1.js b/tests/baselines/reference/augmentExportEquals2_1.js
index 93b76c0259c80..10bc5541bc5c1 100644
--- a/tests/baselines/reference/augmentExportEquals2_1.js
+++ b/tests/baselines/reference/augmentExportEquals2_1.js
@@ -23,11 +23,11 @@ let a: x.A; // should not work
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file3.js]
 define(["require", "exports", "file2"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a; // should not work
 });
diff --git a/tests/baselines/reference/augmentExportEquals3.js b/tests/baselines/reference/augmentExportEquals3.js
index 3ff5f574488e4..82ed6ddc3b57c 100644
--- a/tests/baselines/reference/augmentExportEquals3.js
+++ b/tests/baselines/reference/augmentExportEquals3.js
@@ -35,13 +35,13 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "./file1"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "./file1", "./file2"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = x.b;
 });
diff --git a/tests/baselines/reference/augmentExportEquals3_1.js b/tests/baselines/reference/augmentExportEquals3_1.js
index e91ca4498dd86..a644d08286b4f 100644
--- a/tests/baselines/reference/augmentExportEquals3_1.js
+++ b/tests/baselines/reference/augmentExportEquals3_1.js
@@ -30,13 +30,13 @@ let b = x.b;
 //// [file2.js]
 define(["require", "exports", "file1"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "file1", "file2"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = x.b;
 });
diff --git a/tests/baselines/reference/augmentExportEquals4.js b/tests/baselines/reference/augmentExportEquals4.js
index 3ca522bbc0865..6a969c7894b04 100644
--- a/tests/baselines/reference/augmentExportEquals4.js
+++ b/tests/baselines/reference/augmentExportEquals4.js
@@ -39,13 +39,13 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "./file1"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "./file1", "./file2"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = x.b;
 });
diff --git a/tests/baselines/reference/augmentExportEquals4_1.js b/tests/baselines/reference/augmentExportEquals4_1.js
index cd2f54599699e..1b0c4a028a4a2 100644
--- a/tests/baselines/reference/augmentExportEquals4_1.js
+++ b/tests/baselines/reference/augmentExportEquals4_1.js
@@ -30,13 +30,13 @@ let b = x.b;
 //// [file2.js]
 define(["require", "exports", "file1"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     x.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "file1", "file2"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = x.b;
 });
diff --git a/tests/baselines/reference/augmentExportEquals5.js b/tests/baselines/reference/augmentExportEquals5.js
index e028b2331daf5..7dcea50441d56 100644
--- a/tests/baselines/reference/augmentExportEquals5.js
+++ b/tests/baselines/reference/augmentExportEquals5.js
@@ -83,12 +83,12 @@ const y = x.id;
 //// [augmentation.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [consumer.js]
 define(["require", "exports", "./augmentation"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x;
     var y = x.id;
 });
diff --git a/tests/baselines/reference/augmentExportEquals6.js b/tests/baselines/reference/augmentExportEquals6.js
index 1f6904a4664c6..c1b95b4040d8b 100644
--- a/tests/baselines/reference/augmentExportEquals6.js
+++ b/tests/baselines/reference/augmentExportEquals6.js
@@ -51,13 +51,13 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "./file1"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     x.B.b = 1;
 });
 //// [file3.js]
 define(["require", "exports", "./file1", "./file2"], function (require, exports, x) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = a.a;
     var c = x.B.b;
diff --git a/tests/baselines/reference/augmentExportEquals6_1.js b/tests/baselines/reference/augmentExportEquals6_1.js
index d1c7170993b9e..4a3442327afe3 100644
--- a/tests/baselines/reference/augmentExportEquals6_1.js
+++ b/tests/baselines/reference/augmentExportEquals6_1.js
@@ -28,12 +28,12 @@ let b = a.a;
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file3.js]
 define(["require", "exports", "file2"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = a.a;
 });
diff --git a/tests/baselines/reference/augmentedTypesExternalModule1.js b/tests/baselines/reference/augmentedTypesExternalModule1.js
index 0a8b7404bd1c5..b30966c3a72cc 100644
--- a/tests/baselines/reference/augmentedTypesExternalModule1.js
+++ b/tests/baselines/reference/augmentedTypesExternalModule1.js
@@ -6,7 +6,7 @@ module c5 { } // should be ok everywhere
 //// [augmentedTypesExternalModule1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = 1;
     var c5 = (function () {
         function c5() {
diff --git a/tests/baselines/reference/badExternalModuleReference.js b/tests/baselines/reference/badExternalModuleReference.js
index c1608b4c57e20..c2375ed9c4cff 100644
--- a/tests/baselines/reference/badExternalModuleReference.js
+++ b/tests/baselines/reference/badExternalModuleReference.js
@@ -9,5 +9,5 @@ export declare var a: {
 //// [badExternalModuleReference.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/bangInModuleName.js b/tests/baselines/reference/bangInModuleName.js
index 1a6961f59da5c..dbd6d4ef3ccb4 100644
--- a/tests/baselines/reference/bangInModuleName.js
+++ b/tests/baselines/reference/bangInModuleName.js
@@ -18,5 +18,5 @@ import * as http from 'intern/dojo/node!http';
 /// <reference path="a.d.ts"/>
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/baseConstraintOfDecorator.js b/tests/baselines/reference/baseConstraintOfDecorator.js
index 0bceaca2509a5..4902051136a62 100644
--- a/tests/baselines/reference/baseConstraintOfDecorator.js
+++ b/tests/baselines/reference/baseConstraintOfDecorator.js
@@ -21,7 +21,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function classExtender(superClass, _instanceModifier) {
     return (function (_super) {
         __extends(decoratorFunc, _super);
diff --git a/tests/baselines/reference/bluebirdStaticThis.js b/tests/baselines/reference/bluebirdStaticThis.js
index 1d8d8f2ec43a2..65dc2ece9788e 100644
--- a/tests/baselines/reference/bluebirdStaticThis.js
+++ b/tests/baselines/reference/bluebirdStaticThis.js
@@ -140,17 +140,17 @@ fooProm = Promise.try(Promise, () => {
 
 //// [bluebirdStaticThis.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 var arr;
 var foo;
 var fooProm;
-fooProm = Promise["try"](Promise, function () {
+fooProm = Promise.try(Promise, function () {
     return foo;
 });
-fooProm = Promise["try"](Promise, function () {
+fooProm = Promise.try(Promise, function () {
     return foo;
 }, arr);
-fooProm = Promise["try"](Promise, function () {
+fooProm = Promise.try(Promise, function () {
     return foo;
 }, arr, x);
diff --git a/tests/baselines/reference/cacheResolutions.js b/tests/baselines/reference/cacheResolutions.js
index 8c986c8fa14dd..ff71f2e722326 100644
--- a/tests/baselines/reference/cacheResolutions.js
+++ b/tests/baselines/reference/cacheResolutions.js
@@ -12,18 +12,18 @@ export let x = 1;
 //// [app.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [lib1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [lib2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
diff --git a/tests/baselines/reference/cachedModuleResolution1.js b/tests/baselines/reference/cachedModuleResolution1.js
index cd83308f922cf..2a8211b1e600f 100644
--- a/tests/baselines/reference/cachedModuleResolution1.js
+++ b/tests/baselines/reference/cachedModuleResolution1.js
@@ -11,7 +11,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution2.js b/tests/baselines/reference/cachedModuleResolution2.js
index 8ecb42a32ae04..d649b3c53ee37 100644
--- a/tests/baselines/reference/cachedModuleResolution2.js
+++ b/tests/baselines/reference/cachedModuleResolution2.js
@@ -12,7 +12,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution3.js b/tests/baselines/reference/cachedModuleResolution3.js
index f5da694009969..3fce23e3f228c 100644
--- a/tests/baselines/reference/cachedModuleResolution3.js
+++ b/tests/baselines/reference/cachedModuleResolution3.js
@@ -11,7 +11,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution4.js b/tests/baselines/reference/cachedModuleResolution4.js
index f5417960d4692..2236fdf34ce4c 100644
--- a/tests/baselines/reference/cachedModuleResolution4.js
+++ b/tests/baselines/reference/cachedModuleResolution4.js
@@ -12,7 +12,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution5.js b/tests/baselines/reference/cachedModuleResolution5.js
index 4fe641e917e61..dee5a46122c61 100644
--- a/tests/baselines/reference/cachedModuleResolution5.js
+++ b/tests/baselines/reference/cachedModuleResolution5.js
@@ -11,7 +11,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution6.js b/tests/baselines/reference/cachedModuleResolution6.js
index 364ad55aa6ce1..8a19b1465bc61 100644
--- a/tests/baselines/reference/cachedModuleResolution6.js
+++ b/tests/baselines/reference/cachedModuleResolution6.js
@@ -8,7 +8,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution7.js b/tests/baselines/reference/cachedModuleResolution7.js
index 9b103fdd9bf16..8c9855b143520 100644
--- a/tests/baselines/reference/cachedModuleResolution7.js
+++ b/tests/baselines/reference/cachedModuleResolution7.js
@@ -9,7 +9,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution8.js b/tests/baselines/reference/cachedModuleResolution8.js
index 9e8b67fabf7ae..c071c1dbf94ec 100644
--- a/tests/baselines/reference/cachedModuleResolution8.js
+++ b/tests/baselines/reference/cachedModuleResolution8.js
@@ -8,7 +8,7 @@ import {x} from "foo";
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/cachedModuleResolution9.js b/tests/baselines/reference/cachedModuleResolution9.js
index 8de0a1ff17340..17ef035df3a8c 100644
--- a/tests/baselines/reference/cachedModuleResolution9.js
+++ b/tests/baselines/reference/cachedModuleResolution9.js
@@ -10,7 +10,7 @@ import {x} from "foo";
 
 //// [lib.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/chainedImportAlias.js b/tests/baselines/reference/chainedImportAlias.js
index 8fcdd501707c4..52ed01c77b170 100644
--- a/tests/baselines/reference/chainedImportAlias.js
+++ b/tests/baselines/reference/chainedImportAlias.js
@@ -13,7 +13,7 @@ y.m.foo();
 
 //// [chainedImportAlias_file0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m;
 (function (m) {
     function foo() { }
@@ -21,7 +21,7 @@ var m;
 })(m = exports.m || (exports.m = {}));
 //// [chainedImportAlias_file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = require("./chainedImportAlias_file0");
 var y = x;
 y.m.foo();
diff --git a/tests/baselines/reference/checkJsxChildrenProperty1.js b/tests/baselines/reference/checkJsxChildrenProperty1.js
index 44c1ca8a72945..8609e012d74f0 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty1.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty1.js
@@ -24,7 +24,7 @@ let k2 =
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function Comp(p) {
     return <div>{p.b}</div>;
diff --git a/tests/baselines/reference/checkJsxChildrenProperty12.js b/tests/baselines/reference/checkJsxChildrenProperty12.js
index 0030d87483f2c..c376842f30257 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty12.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty12.js
@@ -44,7 +44,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Button = (function (_super) {
     __extends(Button, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty13.js b/tests/baselines/reference/checkJsxChildrenProperty13.js
index 8947e6b211f08..12db52ed11f0b 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty13.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty13.js
@@ -39,7 +39,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Button = (function (_super) {
     __extends(Button, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty2.js b/tests/baselines/reference/checkJsxChildrenProperty2.js
index dd92bb5dba899..ff7b6585188b1 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty2.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty2.js
@@ -54,7 +54,7 @@ let k5 =
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function Comp(p) {
     return <div>{p.b}</div>;
diff --git a/tests/baselines/reference/checkJsxChildrenProperty3.js b/tests/baselines/reference/checkJsxChildrenProperty3.js
index 49247925523d0..eb589a41de0d8 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty3.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty3.js
@@ -51,7 +51,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var FetchUser = (function (_super) {
     __extends(FetchUser, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty4.js b/tests/baselines/reference/checkJsxChildrenProperty4.js
index d163ffb0f41b5..4c56807a69a99 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty4.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty4.js
@@ -56,7 +56,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var FetchUser = (function (_super) {
     __extends(FetchUser, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty5.js b/tests/baselines/reference/checkJsxChildrenProperty5.js
index a08dae2f25214..3bae0a003ee86 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty5.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty5.js
@@ -42,7 +42,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Button = (function (_super) {
     __extends(Button, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty6.js b/tests/baselines/reference/checkJsxChildrenProperty6.js
index e433bc520dbe3..657b769e03b92 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty6.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty6.js
@@ -55,7 +55,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Button = (function (_super) {
     __extends(Button, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty7.js b/tests/baselines/reference/checkJsxChildrenProperty7.js
index 6a82233f0bc09..009793aa89334 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty7.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty7.js
@@ -40,7 +40,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Button = (function (_super) {
     __extends(Button, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty8.js b/tests/baselines/reference/checkJsxChildrenProperty8.js
index a2cd6a43fa500..6e285e6fd8e5c 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty8.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty8.js
@@ -41,7 +41,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Button = (function (_super) {
     __extends(Button, _super);
diff --git a/tests/baselines/reference/checkJsxChildrenProperty9.js b/tests/baselines/reference/checkJsxChildrenProperty9.js
index 017fb3ac41fa6..c1f0c893aac73 100644
--- a/tests/baselines/reference/checkJsxChildrenProperty9.js
+++ b/tests/baselines/reference/checkJsxChildrenProperty9.js
@@ -8,7 +8,7 @@ let k3 = <div> {1} {"That is a number"} </div>;
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 // OK
 var k1 = <div> <h2> Hello </h2> <h1> world </h1></div>;
diff --git a/tests/baselines/reference/circularReference.js b/tests/baselines/reference/circularReference.js
index 198a886f0267c..f835e928f0837 100644
--- a/tests/baselines/reference/circularReference.js
+++ b/tests/baselines/reference/circularReference.js
@@ -35,7 +35,7 @@ export module M1 {
 
 //// [foo1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo2 = require("./foo2");
 var M1;
 (function (M1) {
@@ -51,7 +51,7 @@ var M1;
 })(M1 = exports.M1 || (exports.M1 = {}));
 //// [foo2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo1 = require("./foo1");
 var M1;
 (function (M1) {
diff --git a/tests/baselines/reference/circularReferenceInImport.js b/tests/baselines/reference/circularReferenceInImport.js
index 432a03d090cac..b9ad09c687b48 100644
--- a/tests/baselines/reference/circularReferenceInImport.js
+++ b/tests/baselines/reference/circularReferenceInImport.js
@@ -16,7 +16,7 @@ export function foo() {
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() {
     return new Object();
 }
diff --git a/tests/baselines/reference/classAbstractManyKeywords.js b/tests/baselines/reference/classAbstractManyKeywords.js
index c2af09eb4d8f8..64d8f54fe8ca1 100644
--- a/tests/baselines/reference/classAbstractManyKeywords.js
+++ b/tests/baselines/reference/classAbstractManyKeywords.js
@@ -6,13 +6,13 @@ import abstract class D {}
 
 //// [classAbstractManyKeywords.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
     return A;
 }());
-exports["default"] = A;
+exports.default = A;
 var B = (function () {
     function B() {
     }
diff --git a/tests/baselines/reference/classMemberInitializerWithLamdaScoping3.js b/tests/baselines/reference/classMemberInitializerWithLamdaScoping3.js
index d4df05f2ea353..5a3f3fad9a33d 100644
--- a/tests/baselines/reference/classMemberInitializerWithLamdaScoping3.js
+++ b/tests/baselines/reference/classMemberInitializerWithLamdaScoping3.js
@@ -21,7 +21,7 @@ export class Test1 {
 var field1;
 //// [classMemberInitializerWithLamdaScoping3_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Test1 = (function () {
     function Test1(field1) {
         this.field1 = field1;
diff --git a/tests/baselines/reference/classMemberInitializerWithLamdaScoping4.js b/tests/baselines/reference/classMemberInitializerWithLamdaScoping4.js
index 76835e757e074..f42478e397ca1 100644
--- a/tests/baselines/reference/classMemberInitializerWithLamdaScoping4.js
+++ b/tests/baselines/reference/classMemberInitializerWithLamdaScoping4.js
@@ -17,10 +17,10 @@ export class Test1 {
 
 //// [classMemberInitializerWithLamdaScoping3_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [classMemberInitializerWithLamdaScoping3_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Test1 = (function () {
     function Test1(field1) {
         this.field1 = field1;
diff --git a/tests/baselines/reference/classMethodWithKeywordName1.js b/tests/baselines/reference/classMethodWithKeywordName1.js
index a7cb994bfb397..6e1faee005cc0 100644
--- a/tests/baselines/reference/classMethodWithKeywordName1.js
+++ b/tests/baselines/reference/classMethodWithKeywordName1.js
@@ -7,6 +7,6 @@ class C {
 var C = (function () {
     function C() {
     }
-    C["try"] = function () { };
+    C.try = function () { };
     return C;
 }());
diff --git a/tests/baselines/reference/classPropertyAsPrivate.errors.txt b/tests/baselines/reference/classPropertyAsPrivate.errors.txt
index 4cc38cb049f34..62dc6a6e77477 100644
--- a/tests/baselines/reference/classPropertyAsPrivate.errors.txt
+++ b/tests/baselines/reference/classPropertyAsPrivate.errors.txt
@@ -1,7 +1,3 @@
-tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(3,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(4,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(8,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(9,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(15,3): error TS2341: Property 'x' is private and only accessible within class 'C'.
 tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(16,3): error TS2341: Property 'y' is private and only accessible within class 'C'.
 tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(17,3): error TS2341: Property 'y' is private and only accessible within class 'C'.
@@ -12,24 +8,16 @@ tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(
 tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts(23,3): error TS2341: Property 'foo' is private and only accessible within class 'C'.
 
 
-==== tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts (12 errors) ====
+==== tests/cases/conformance/classes/members/accessibility/classPropertyAsPrivate.ts (8 errors) ====
     class C {
         private x: string;
         private get y() { return null; }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         private set y(x) { }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         private foo() { }
     
         private static a: string;
         private static get b() { return null; }
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         private static set b(x) { }
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         private static foo() { }
     }
     
diff --git a/tests/baselines/reference/classPropertyAsProtected.errors.txt b/tests/baselines/reference/classPropertyAsProtected.errors.txt
index acfba42f9e3fb..e1eda21b9eba2 100644
--- a/tests/baselines/reference/classPropertyAsProtected.errors.txt
+++ b/tests/baselines/reference/classPropertyAsProtected.errors.txt
@@ -1,7 +1,3 @@
-tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(3,19): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(4,19): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(8,26): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(9,26): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(15,3): error TS2445: Property 'x' is protected and only accessible within class 'C' and its subclasses.
 tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(16,3): error TS2445: Property 'y' is protected and only accessible within class 'C' and its subclasses.
 tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(17,3): error TS2445: Property 'y' is protected and only accessible within class 'C' and its subclasses.
@@ -12,24 +8,16 @@ tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.t
 tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts(23,3): error TS2445: Property 'foo' is protected and only accessible within class 'C' and its subclasses.
 
 
-==== tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts (12 errors) ====
+==== tests/cases/conformance/classes/members/accessibility/classPropertyAsProtected.ts (8 errors) ====
     class C {
         protected x: string;
         protected get y() { return null; }
-                      ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         protected set y(x) { }
-                      ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         protected foo() { }
     
         protected static a: string;
         protected static get b() { return null; }
-                             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         protected static set b(x) { }
-                             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         protected static foo() { }
     }
     
diff --git a/tests/baselines/reference/classPropertyIsPublicByDefault.errors.txt b/tests/baselines/reference/classPropertyIsPublicByDefault.errors.txt
deleted file mode 100644
index 1d200f6e2e797..0000000000000
--- a/tests/baselines/reference/classPropertyIsPublicByDefault.errors.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-tests/cases/conformance/classes/members/accessibility/classPropertyIsPublicByDefault.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyIsPublicByDefault.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyIsPublicByDefault.ts(8,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/classPropertyIsPublicByDefault.ts(9,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/members/accessibility/classPropertyIsPublicByDefault.ts (4 errors) ====
-    class C {
-        x: string;
-        get y() { return null; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        set y(x) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        foo() { }
-    
-        static a: string;
-        static get b() { return null; }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static set b(x) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static foo() { }
-    }
-    
-    var c: C;
-    c.x;
-    c.y;
-    c.y = 1;
-    c.foo();
-    
-    C.a;
-    C.b();
-    C.b = 1;
-    C.foo();
\ No newline at end of file
diff --git a/tests/baselines/reference/classPropertyIsPublicByDefault.symbols b/tests/baselines/reference/classPropertyIsPublicByDefault.symbols
new file mode 100644
index 0000000000000..5ef62364af752
--- /dev/null
+++ b/tests/baselines/reference/classPropertyIsPublicByDefault.symbols
@@ -0,0 +1,75 @@
+=== tests/cases/conformance/classes/members/accessibility/classPropertyIsPublicByDefault.ts ===
+class C {
+>C : Symbol(C, Decl(classPropertyIsPublicByDefault.ts, 0, 0))
+
+    x: string;
+>x : Symbol(C.x, Decl(classPropertyIsPublicByDefault.ts, 0, 9))
+
+    get y() { return null; }
+>y : Symbol(C.y, Decl(classPropertyIsPublicByDefault.ts, 1, 14), Decl(classPropertyIsPublicByDefault.ts, 2, 28))
+
+    set y(x) { }
+>y : Symbol(C.y, Decl(classPropertyIsPublicByDefault.ts, 1, 14), Decl(classPropertyIsPublicByDefault.ts, 2, 28))
+>x : Symbol(x, Decl(classPropertyIsPublicByDefault.ts, 3, 10))
+
+    foo() { }
+>foo : Symbol(C.foo, Decl(classPropertyIsPublicByDefault.ts, 3, 16))
+
+    static a: string;
+>a : Symbol(C.a, Decl(classPropertyIsPublicByDefault.ts, 4, 13))
+
+    static get b() { return null; }
+>b : Symbol(C.b, Decl(classPropertyIsPublicByDefault.ts, 6, 21), Decl(classPropertyIsPublicByDefault.ts, 7, 35))
+
+    static set b(x) { }
+>b : Symbol(C.b, Decl(classPropertyIsPublicByDefault.ts, 6, 21), Decl(classPropertyIsPublicByDefault.ts, 7, 35))
+>x : Symbol(x, Decl(classPropertyIsPublicByDefault.ts, 8, 17))
+
+    static foo() { }
+>foo : Symbol(C.foo, Decl(classPropertyIsPublicByDefault.ts, 8, 23))
+}
+
+var c: C;
+>c : Symbol(c, Decl(classPropertyIsPublicByDefault.ts, 12, 3))
+>C : Symbol(C, Decl(classPropertyIsPublicByDefault.ts, 0, 0))
+
+c.x;
+>c.x : Symbol(C.x, Decl(classPropertyIsPublicByDefault.ts, 0, 9))
+>c : Symbol(c, Decl(classPropertyIsPublicByDefault.ts, 12, 3))
+>x : Symbol(C.x, Decl(classPropertyIsPublicByDefault.ts, 0, 9))
+
+c.y;
+>c.y : Symbol(C.y, Decl(classPropertyIsPublicByDefault.ts, 1, 14), Decl(classPropertyIsPublicByDefault.ts, 2, 28))
+>c : Symbol(c, Decl(classPropertyIsPublicByDefault.ts, 12, 3))
+>y : Symbol(C.y, Decl(classPropertyIsPublicByDefault.ts, 1, 14), Decl(classPropertyIsPublicByDefault.ts, 2, 28))
+
+c.y = 1;
+>c.y : Symbol(C.y, Decl(classPropertyIsPublicByDefault.ts, 1, 14), Decl(classPropertyIsPublicByDefault.ts, 2, 28))
+>c : Symbol(c, Decl(classPropertyIsPublicByDefault.ts, 12, 3))
+>y : Symbol(C.y, Decl(classPropertyIsPublicByDefault.ts, 1, 14), Decl(classPropertyIsPublicByDefault.ts, 2, 28))
+
+c.foo();
+>c.foo : Symbol(C.foo, Decl(classPropertyIsPublicByDefault.ts, 3, 16))
+>c : Symbol(c, Decl(classPropertyIsPublicByDefault.ts, 12, 3))
+>foo : Symbol(C.foo, Decl(classPropertyIsPublicByDefault.ts, 3, 16))
+
+C.a;
+>C.a : Symbol(C.a, Decl(classPropertyIsPublicByDefault.ts, 4, 13))
+>C : Symbol(C, Decl(classPropertyIsPublicByDefault.ts, 0, 0))
+>a : Symbol(C.a, Decl(classPropertyIsPublicByDefault.ts, 4, 13))
+
+C.b();
+>C.b : Symbol(C.b, Decl(classPropertyIsPublicByDefault.ts, 6, 21), Decl(classPropertyIsPublicByDefault.ts, 7, 35))
+>C : Symbol(C, Decl(classPropertyIsPublicByDefault.ts, 0, 0))
+>b : Symbol(C.b, Decl(classPropertyIsPublicByDefault.ts, 6, 21), Decl(classPropertyIsPublicByDefault.ts, 7, 35))
+
+C.b = 1;
+>C.b : Symbol(C.b, Decl(classPropertyIsPublicByDefault.ts, 6, 21), Decl(classPropertyIsPublicByDefault.ts, 7, 35))
+>C : Symbol(C, Decl(classPropertyIsPublicByDefault.ts, 0, 0))
+>b : Symbol(C.b, Decl(classPropertyIsPublicByDefault.ts, 6, 21), Decl(classPropertyIsPublicByDefault.ts, 7, 35))
+
+C.foo();
+>C.foo : Symbol(C.foo, Decl(classPropertyIsPublicByDefault.ts, 8, 23))
+>C : Symbol(C, Decl(classPropertyIsPublicByDefault.ts, 0, 0))
+>foo : Symbol(C.foo, Decl(classPropertyIsPublicByDefault.ts, 8, 23))
+
diff --git a/tests/baselines/reference/classPropertyIsPublicByDefault.types b/tests/baselines/reference/classPropertyIsPublicByDefault.types
new file mode 100644
index 0000000000000..24f18b8a1a454
--- /dev/null
+++ b/tests/baselines/reference/classPropertyIsPublicByDefault.types
@@ -0,0 +1,84 @@
+=== tests/cases/conformance/classes/members/accessibility/classPropertyIsPublicByDefault.ts ===
+class C {
+>C : C
+
+    x: string;
+>x : string
+
+    get y() { return null; }
+>y : any
+>null : null
+
+    set y(x) { }
+>y : any
+>x : any
+
+    foo() { }
+>foo : () => void
+
+    static a: string;
+>a : string
+
+    static get b() { return null; }
+>b : any
+>null : null
+
+    static set b(x) { }
+>b : any
+>x : any
+
+    static foo() { }
+>foo : () => void
+}
+
+var c: C;
+>c : C
+>C : C
+
+c.x;
+>c.x : string
+>c : C
+>x : string
+
+c.y;
+>c.y : any
+>c : C
+>y : any
+
+c.y = 1;
+>c.y = 1 : 1
+>c.y : any
+>c : C
+>y : any
+>1 : 1
+
+c.foo();
+>c.foo() : void
+>c.foo : () => void
+>c : C
+>foo : () => void
+
+C.a;
+>C.a : string
+>C : typeof C
+>a : string
+
+C.b();
+>C.b() : any
+>C.b : any
+>C : typeof C
+>b : any
+
+C.b = 1;
+>C.b = 1 : 1
+>C.b : any
+>C : typeof C
+>b : any
+>1 : 1
+
+C.foo();
+>C.foo() : void
+>C.foo : () => void
+>C : typeof C
+>foo : () => void
+
diff --git a/tests/baselines/reference/classWithStaticMembers.errors.txt b/tests/baselines/reference/classWithStaticMembers.errors.txt
deleted file mode 100644
index 814cb9343e8a4..0000000000000
--- a/tests/baselines/reference/classWithStaticMembers.errors.txt
+++ /dev/null
@@ -1,28 +0,0 @@
-tests/cases/conformance/classes/members/constructorFunctionTypes/classWithStaticMembers.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/constructorFunctionTypes/classWithStaticMembers.ts(4,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/members/constructorFunctionTypes/classWithStaticMembers.ts (2 errors) ====
-    class C {
-        static fn() { return this; }
-        static get x() { return 1; }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static set x(v) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        constructor(public a: number, private b: number) { }
-        static foo: string; 
-    }
-    
-    var r = C.fn();
-    var r2 = r.x;
-    var r3 = r.foo;
-    
-    class D extends C {
-        bar: string;
-    }
-    
-    var r = D.fn();
-    var r2 = r.x;
-    var r3 = r.foo;
\ No newline at end of file
diff --git a/tests/baselines/reference/classWithStaticMembers.symbols b/tests/baselines/reference/classWithStaticMembers.symbols
new file mode 100644
index 0000000000000..3c52f7f8052a1
--- /dev/null
+++ b/tests/baselines/reference/classWithStaticMembers.symbols
@@ -0,0 +1,67 @@
+=== tests/cases/conformance/classes/members/constructorFunctionTypes/classWithStaticMembers.ts ===
+class C {
+>C : Symbol(C, Decl(classWithStaticMembers.ts, 0, 0))
+
+    static fn() { return this; }
+>fn : Symbol(C.fn, Decl(classWithStaticMembers.ts, 0, 9))
+>this : Symbol(C, Decl(classWithStaticMembers.ts, 0, 0))
+
+    static get x() { return 1; }
+>x : Symbol(C.x, Decl(classWithStaticMembers.ts, 1, 32), Decl(classWithStaticMembers.ts, 2, 32))
+
+    static set x(v) { }
+>x : Symbol(C.x, Decl(classWithStaticMembers.ts, 1, 32), Decl(classWithStaticMembers.ts, 2, 32))
+>v : Symbol(v, Decl(classWithStaticMembers.ts, 3, 17))
+
+    constructor(public a: number, private b: number) { }
+>a : Symbol(C.a, Decl(classWithStaticMembers.ts, 4, 16))
+>b : Symbol(C.b, Decl(classWithStaticMembers.ts, 4, 33))
+
+    static foo: string; 
+>foo : Symbol(C.foo, Decl(classWithStaticMembers.ts, 4, 56))
+}
+
+var r = C.fn();
+>r : Symbol(r, Decl(classWithStaticMembers.ts, 8, 3), Decl(classWithStaticMembers.ts, 16, 3))
+>C.fn : Symbol(C.fn, Decl(classWithStaticMembers.ts, 0, 9))
+>C : Symbol(C, Decl(classWithStaticMembers.ts, 0, 0))
+>fn : Symbol(C.fn, Decl(classWithStaticMembers.ts, 0, 9))
+
+var r2 = r.x;
+>r2 : Symbol(r2, Decl(classWithStaticMembers.ts, 9, 3), Decl(classWithStaticMembers.ts, 17, 3))
+>r.x : Symbol(C.x, Decl(classWithStaticMembers.ts, 1, 32), Decl(classWithStaticMembers.ts, 2, 32))
+>r : Symbol(r, Decl(classWithStaticMembers.ts, 8, 3), Decl(classWithStaticMembers.ts, 16, 3))
+>x : Symbol(C.x, Decl(classWithStaticMembers.ts, 1, 32), Decl(classWithStaticMembers.ts, 2, 32))
+
+var r3 = r.foo;
+>r3 : Symbol(r3, Decl(classWithStaticMembers.ts, 10, 3), Decl(classWithStaticMembers.ts, 18, 3))
+>r.foo : Symbol(C.foo, Decl(classWithStaticMembers.ts, 4, 56))
+>r : Symbol(r, Decl(classWithStaticMembers.ts, 8, 3), Decl(classWithStaticMembers.ts, 16, 3))
+>foo : Symbol(C.foo, Decl(classWithStaticMembers.ts, 4, 56))
+
+class D extends C {
+>D : Symbol(D, Decl(classWithStaticMembers.ts, 10, 15))
+>C : Symbol(C, Decl(classWithStaticMembers.ts, 0, 0))
+
+    bar: string;
+>bar : Symbol(D.bar, Decl(classWithStaticMembers.ts, 12, 19))
+}
+
+var r = D.fn();
+>r : Symbol(r, Decl(classWithStaticMembers.ts, 8, 3), Decl(classWithStaticMembers.ts, 16, 3))
+>D.fn : Symbol(C.fn, Decl(classWithStaticMembers.ts, 0, 9))
+>D : Symbol(D, Decl(classWithStaticMembers.ts, 10, 15))
+>fn : Symbol(C.fn, Decl(classWithStaticMembers.ts, 0, 9))
+
+var r2 = r.x;
+>r2 : Symbol(r2, Decl(classWithStaticMembers.ts, 9, 3), Decl(classWithStaticMembers.ts, 17, 3))
+>r.x : Symbol(C.x, Decl(classWithStaticMembers.ts, 1, 32), Decl(classWithStaticMembers.ts, 2, 32))
+>r : Symbol(r, Decl(classWithStaticMembers.ts, 8, 3), Decl(classWithStaticMembers.ts, 16, 3))
+>x : Symbol(C.x, Decl(classWithStaticMembers.ts, 1, 32), Decl(classWithStaticMembers.ts, 2, 32))
+
+var r3 = r.foo;
+>r3 : Symbol(r3, Decl(classWithStaticMembers.ts, 10, 3), Decl(classWithStaticMembers.ts, 18, 3))
+>r.foo : Symbol(C.foo, Decl(classWithStaticMembers.ts, 4, 56))
+>r : Symbol(r, Decl(classWithStaticMembers.ts, 8, 3), Decl(classWithStaticMembers.ts, 16, 3))
+>foo : Symbol(C.foo, Decl(classWithStaticMembers.ts, 4, 56))
+
diff --git a/tests/baselines/reference/classWithStaticMembers.types b/tests/baselines/reference/classWithStaticMembers.types
new file mode 100644
index 0000000000000..aee780fc0e6a1
--- /dev/null
+++ b/tests/baselines/reference/classWithStaticMembers.types
@@ -0,0 +1,70 @@
+=== tests/cases/conformance/classes/members/constructorFunctionTypes/classWithStaticMembers.ts ===
+class C {
+>C : C
+
+    static fn() { return this; }
+>fn : () => typeof C
+>this : typeof C
+
+    static get x() { return 1; }
+>x : number
+>1 : 1
+
+    static set x(v) { }
+>x : number
+>v : number
+
+    constructor(public a: number, private b: number) { }
+>a : number
+>b : number
+
+    static foo: string; 
+>foo : string
+}
+
+var r = C.fn();
+>r : typeof C
+>C.fn() : typeof C
+>C.fn : () => typeof C
+>C : typeof C
+>fn : () => typeof C
+
+var r2 = r.x;
+>r2 : number
+>r.x : number
+>r : typeof C
+>x : number
+
+var r3 = r.foo;
+>r3 : string
+>r.foo : string
+>r : typeof C
+>foo : string
+
+class D extends C {
+>D : D
+>C : C
+
+    bar: string;
+>bar : string
+}
+
+var r = D.fn();
+>r : typeof C
+>D.fn() : typeof C
+>D.fn : () => typeof C
+>D : typeof D
+>fn : () => typeof C
+
+var r2 = r.x;
+>r2 : number
+>r.x : number
+>r : typeof C
+>x : number
+
+var r3 = r.foo;
+>r3 : string
+>r.foo : string
+>r : typeof C
+>foo : string
+
diff --git a/tests/baselines/reference/cloduleWithDuplicateMember1.errors.txt b/tests/baselines/reference/cloduleWithDuplicateMember1.errors.txt
index 914088f6c1925..f1ba6b73571a3 100644
--- a/tests/baselines/reference/cloduleWithDuplicateMember1.errors.txt
+++ b/tests/baselines/reference/cloduleWithDuplicateMember1.errors.txt
@@ -1,5 +1,3 @@
-tests/cases/compiler/cloduleWithDuplicateMember1.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/cloduleWithDuplicateMember1.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/cloduleWithDuplicateMember1.ts(3,16): error TS2300: Duplicate identifier 'x'.
 tests/cases/compiler/cloduleWithDuplicateMember1.ts(6,12): error TS2300: Duplicate identifier 'foo'.
 tests/cases/compiler/cloduleWithDuplicateMember1.ts(10,16): error TS2300: Duplicate identifier 'x'.
@@ -7,15 +5,11 @@ tests/cases/compiler/cloduleWithDuplicateMember1.ts(13,21): error TS2300: Duplic
 tests/cases/compiler/cloduleWithDuplicateMember1.ts(14,21): error TS2300: Duplicate identifier 'x'.
 
 
-==== tests/cases/compiler/cloduleWithDuplicateMember1.ts (7 errors) ====
+==== tests/cases/compiler/cloduleWithDuplicateMember1.ts (5 errors) ====
     class C {
         get x() { return 1; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         static get x() {
                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~
 !!! error TS2300: Duplicate identifier 'x'.
             return '';
         }
diff --git a/tests/baselines/reference/cloduleWithDuplicateMember2.errors.txt b/tests/baselines/reference/cloduleWithDuplicateMember2.errors.txt
index 55d2fdbddf26c..fee68785cbba3 100644
--- a/tests/baselines/reference/cloduleWithDuplicateMember2.errors.txt
+++ b/tests/baselines/reference/cloduleWithDuplicateMember2.errors.txt
@@ -1,17 +1,11 @@
-tests/cases/compiler/cloduleWithDuplicateMember2.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/cloduleWithDuplicateMember2.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/cloduleWithDuplicateMember2.ts(7,16): error TS2300: Duplicate identifier 'x'.
 tests/cases/compiler/cloduleWithDuplicateMember2.ts(10,21): error TS2300: Duplicate identifier 'x'.
 
 
-==== tests/cases/compiler/cloduleWithDuplicateMember2.ts (4 errors) ====
+==== tests/cases/compiler/cloduleWithDuplicateMember2.ts (2 errors) ====
     class C {
         set x(y) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         static set y(z) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
     
     module C {
diff --git a/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.errors.txt b/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.errors.txt
deleted file mode 100644
index 9ba074a1cae23..0000000000000
--- a/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.errors.txt
+++ /dev/null
@@ -1,63 +0,0 @@
-tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts(5,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts(14,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts(24,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts(32,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts(41,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts (5 errors) ====
-    module M {
-        export var x = 3;
-        class c {
-            private y;
-            set Z(M) {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                this.y = x;
-            }
-        }
-    }
-    
-    module M {
-        class d {
-            private y;
-            set Z(p) {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                var M = 10;
-                this.y = x;
-            }
-        }
-    }
-    
-    module M { // Shouldnt be _M
-        class e {
-            private y;
-            set M(p) {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                this.y = x;
-            }
-        }
-    }
-    
-    module M {
-        class f {
-            get Z() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                var M = 10;
-                return x;
-            }
-        }
-    }
-    
-    module M { // Shouldnt be _M
-        class e {
-            get M() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                return x;
-            }
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.symbols b/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.symbols
new file mode 100644
index 0000000000000..d3236ab72cb7b
--- /dev/null
+++ b/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.symbols
@@ -0,0 +1,105 @@
+=== tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts ===
+module M {
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 0, 0), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 8, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 18, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 27, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 36, 1))
+
+    export var x = 3;
+>x : Symbol(x, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 14))
+
+    class c {
+>c : Symbol(c, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 21))
+
+        private y;
+>y : Symbol(c.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 2, 13))
+
+        set Z(M) {
+>Z : Symbol(c.Z, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 3, 18))
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 4, 14))
+
+            this.y = x;
+>this.y : Symbol(c.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 2, 13))
+>this : Symbol(c, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 21))
+>y : Symbol(c.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 2, 13))
+>x : Symbol(x, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 14))
+        }
+    }
+}
+
+module M {
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 0, 0), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 8, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 18, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 27, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 36, 1))
+
+    class d {
+>d : Symbol(d, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 10, 10))
+
+        private y;
+>y : Symbol(d.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 11, 13))
+
+        set Z(p) {
+>Z : Symbol(d.Z, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 12, 18))
+>p : Symbol(p, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 13, 14))
+
+            var M = 10;
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 14, 15))
+
+            this.y = x;
+>this.y : Symbol(d.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 11, 13))
+>this : Symbol(d, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 10, 10))
+>y : Symbol(d.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 11, 13))
+>x : Symbol(x, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 14))
+        }
+    }
+}
+
+module M { // Shouldnt be _M
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 0, 0), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 8, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 18, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 27, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 36, 1))
+
+    class e {
+>e : Symbol(e, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 20, 10))
+
+        private y;
+>y : Symbol(e.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 21, 13))
+
+        set M(p) {
+>M : Symbol(e.M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 22, 18))
+>p : Symbol(p, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 23, 14))
+
+            this.y = x;
+>this.y : Symbol(e.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 21, 13))
+>this : Symbol(e, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 20, 10))
+>y : Symbol(e.y, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 21, 13))
+>x : Symbol(x, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 14))
+        }
+    }
+}
+
+module M {
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 0, 0), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 8, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 18, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 27, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 36, 1))
+
+    class f {
+>f : Symbol(f, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 29, 10))
+
+        get Z() {
+>Z : Symbol(f.Z, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 30, 13))
+
+            var M = 10;
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 32, 15))
+
+            return x;
+>x : Symbol(x, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 14))
+        }
+    }
+}
+
+module M { // Shouldnt be _M
+>M : Symbol(M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 0, 0), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 8, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 18, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 27, 1), Decl(collisionCodeGenModuleWithAccessorChildren.ts, 36, 1))
+
+    class e {
+>e : Symbol(e, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 38, 10))
+
+        get M() {
+>M : Symbol(e.M, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 39, 13))
+
+            return x;
+>x : Symbol(x, Decl(collisionCodeGenModuleWithAccessorChildren.ts, 1, 14))
+        }
+    }
+}
diff --git a/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.types b/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.types
new file mode 100644
index 0000000000000..121c9bda818fd
--- /dev/null
+++ b/tests/baselines/reference/collisionCodeGenModuleWithAccessorChildren.types
@@ -0,0 +1,111 @@
+=== tests/cases/compiler/collisionCodeGenModuleWithAccessorChildren.ts ===
+module M {
+>M : typeof M
+
+    export var x = 3;
+>x : number
+>3 : 3
+
+    class c {
+>c : c
+
+        private y;
+>y : any
+
+        set Z(M) {
+>Z : any
+>M : any
+
+            this.y = x;
+>this.y = x : number
+>this.y : any
+>this : this
+>y : any
+>x : number
+        }
+    }
+}
+
+module M {
+>M : typeof M
+
+    class d {
+>d : d
+
+        private y;
+>y : any
+
+        set Z(p) {
+>Z : any
+>p : any
+
+            var M = 10;
+>M : number
+>10 : 10
+
+            this.y = x;
+>this.y = x : number
+>this.y : any
+>this : this
+>y : any
+>x : number
+        }
+    }
+}
+
+module M { // Shouldnt be _M
+>M : typeof M
+
+    class e {
+>e : e
+
+        private y;
+>y : any
+
+        set M(p) {
+>M : any
+>p : any
+
+            this.y = x;
+>this.y = x : number
+>this.y : any
+>this : this
+>y : any
+>x : number
+        }
+    }
+}
+
+module M {
+>M : typeof M
+
+    class f {
+>f : f
+
+        get Z() {
+>Z : number
+
+            var M = 10;
+>M : number
+>10 : 10
+
+            return x;
+>x : number
+        }
+    }
+}
+
+module M { // Shouldnt be _M
+>M : typeof M
+
+    class e {
+>e : e
+
+        get M() {
+>M : number
+
+            return x;
+>x : number
+        }
+    }
+}
diff --git a/tests/baselines/reference/collisionExportsRequireAndAlias.js b/tests/baselines/reference/collisionExportsRequireAndAlias.js
index 487553bb00492..15c1754e75875 100644
--- a/tests/baselines/reference/collisionExportsRequireAndAlias.js
+++ b/tests/baselines/reference/collisionExportsRequireAndAlias.js
@@ -20,7 +20,7 @@ export function foo2() {
 //// [collisionExportsRequireAndAlias_file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function bar() {
     }
     exports.bar = bar;
@@ -28,7 +28,7 @@ define(["require", "exports"], function (require, exports) {
 //// [collisionExportsRequireAndAlias_file3333.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function bar2() {
     }
     exports.bar2 = bar2;
@@ -36,7 +36,7 @@ define(["require", "exports"], function (require, exports) {
 //// [collisionExportsRequireAndAlias_file2.js]
 define(["require", "exports", "collisionExportsRequireAndAlias_file1", "collisionExportsRequireAndAlias_file3333"], function (require, exports, require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo() {
         require.bar();
     }
diff --git a/tests/baselines/reference/collisionExportsRequireAndAmbientClass.js b/tests/baselines/reference/collisionExportsRequireAndAmbientClass.js
index 1a16f4a2d5f95..19e18fec62ed9 100644
--- a/tests/baselines/reference/collisionExportsRequireAndAmbientClass.js
+++ b/tests/baselines/reference/collisionExportsRequireAndAmbientClass.js
@@ -40,7 +40,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientClass_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m2;
     (function (m2) {
     })(m2 || (m2 = {}));
diff --git a/tests/baselines/reference/collisionExportsRequireAndAmbientEnum.js b/tests/baselines/reference/collisionExportsRequireAndAmbientEnum.js
index 0e717b01d3bd0..d34102f1bbd2a 100644
--- a/tests/baselines/reference/collisionExportsRequireAndAmbientEnum.js
+++ b/tests/baselines/reference/collisionExportsRequireAndAmbientEnum.js
@@ -63,7 +63,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientEnum_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m2;
     (function (m2) {
     })(m2 || (m2 = {}));
diff --git a/tests/baselines/reference/collisionExportsRequireAndAmbientFunction.js b/tests/baselines/reference/collisionExportsRequireAndAmbientFunction.js
index 050799d4c2b7b..fe39d0d15e77f 100644
--- a/tests/baselines/reference/collisionExportsRequireAndAmbientFunction.js
+++ b/tests/baselines/reference/collisionExportsRequireAndAmbientFunction.js
@@ -16,7 +16,7 @@ module m2 {
 //// [collisionExportsRequireAndAmbientFunction.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m2;
     (function (m2) {
         var a = 10;
diff --git a/tests/baselines/reference/collisionExportsRequireAndAmbientModule.js b/tests/baselines/reference/collisionExportsRequireAndAmbientModule.js
index 2eb5ea74f920e..2aafba497b2b2 100644
--- a/tests/baselines/reference/collisionExportsRequireAndAmbientModule.js
+++ b/tests/baselines/reference/collisionExportsRequireAndAmbientModule.js
@@ -97,7 +97,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientModule_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo() {
         return null;
     }
diff --git a/tests/baselines/reference/collisionExportsRequireAndAmbientVar.js b/tests/baselines/reference/collisionExportsRequireAndAmbientVar.js
index 8454248845a61..3599b9f4133ad 100644
--- a/tests/baselines/reference/collisionExportsRequireAndAmbientVar.js
+++ b/tests/baselines/reference/collisionExportsRequireAndAmbientVar.js
@@ -29,7 +29,7 @@ module m4 {
 //// [collisionExportsRequireAndAmbientVar_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m2;
     (function (m2) {
         var a = 10;
diff --git a/tests/baselines/reference/collisionExportsRequireAndClass.js b/tests/baselines/reference/collisionExportsRequireAndClass.js
index 0bc56b97cf111..d963975219e69 100644
--- a/tests/baselines/reference/collisionExportsRequireAndClass.js
+++ b/tests/baselines/reference/collisionExportsRequireAndClass.js
@@ -39,7 +39,7 @@ module m4 {
 //// [collisionExportsRequireAndClass_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var require = (function () {
         function require() {
         }
diff --git a/tests/baselines/reference/collisionExportsRequireAndEnum.js b/tests/baselines/reference/collisionExportsRequireAndEnum.js
index 4bb6614ffe768..d2367cfd77b5b 100644
--- a/tests/baselines/reference/collisionExportsRequireAndEnum.js
+++ b/tests/baselines/reference/collisionExportsRequireAndEnum.js
@@ -63,7 +63,7 @@ module m4 {
 //// [collisionExportsRequireAndEnum_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var require;
     (function (require) {
         require[require["_thisVal1"] = 0] = "_thisVal1";
diff --git a/tests/baselines/reference/collisionExportsRequireAndFunction.js b/tests/baselines/reference/collisionExportsRequireAndFunction.js
index 1da8cf29d665f..1c0e19d3ca57e 100644
--- a/tests/baselines/reference/collisionExportsRequireAndFunction.js
+++ b/tests/baselines/reference/collisionExportsRequireAndFunction.js
@@ -25,7 +25,7 @@ module m2 {
 //// [collisionExportsRequireAndFunction.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function exports() {
         return 1;
     }
diff --git a/tests/baselines/reference/collisionExportsRequireAndInternalModuleAlias.js b/tests/baselines/reference/collisionExportsRequireAndInternalModuleAlias.js
index 9cb3c4e797e0e..b6edbbbe0427f 100644
--- a/tests/baselines/reference/collisionExportsRequireAndInternalModuleAlias.js
+++ b/tests/baselines/reference/collisionExportsRequireAndInternalModuleAlias.js
@@ -25,7 +25,7 @@ module m2 {
 //// [collisionExportsRequireAndInternalModuleAlias.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m;
     (function (m) {
         var c = (function () {
diff --git a/tests/baselines/reference/collisionExportsRequireAndModule.js b/tests/baselines/reference/collisionExportsRequireAndModule.js
index 4282095500408..fbd7d6ead405a 100644
--- a/tests/baselines/reference/collisionExportsRequireAndModule.js
+++ b/tests/baselines/reference/collisionExportsRequireAndModule.js
@@ -94,7 +94,7 @@ module m4 {
 //// [collisionExportsRequireAndModule_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var require;
     (function (require) {
         var C = (function () {
diff --git a/tests/baselines/reference/collisionExportsRequireAndUninstantiatedModule.js b/tests/baselines/reference/collisionExportsRequireAndUninstantiatedModule.js
index b9552c16223f2..042a5ca38e40c 100644
--- a/tests/baselines/reference/collisionExportsRequireAndUninstantiatedModule.js
+++ b/tests/baselines/reference/collisionExportsRequireAndUninstantiatedModule.js
@@ -17,7 +17,7 @@ export function foo2(): exports.I {
 //// [collisionExportsRequireAndUninstantiatedModule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo() {
         return null;
     }
diff --git a/tests/baselines/reference/collisionExportsRequireAndVar.js b/tests/baselines/reference/collisionExportsRequireAndVar.js
index 9a20472ea685b..f7d5237c0c3b9 100644
--- a/tests/baselines/reference/collisionExportsRequireAndVar.js
+++ b/tests/baselines/reference/collisionExportsRequireAndVar.js
@@ -29,7 +29,7 @@ module m4 {
 //// [collisionExportsRequireAndVar_externalmodule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo() {
     }
     exports.foo = foo;
diff --git a/tests/baselines/reference/collisionSuperAndLocalFunctionInAccessors.errors.txt b/tests/baselines/reference/collisionSuperAndLocalFunctionInAccessors.errors.txt
index 16b4edced7be8..973ab2e67bb8d 100644
--- a/tests/baselines/reference/collisionSuperAndLocalFunctionInAccessors.errors.txt
+++ b/tests/baselines/reference/collisionSuperAndLocalFunctionInAccessors.errors.txt
@@ -1,37 +1,25 @@
-tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(9,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(16,18): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
-tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(20,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(21,18): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
-tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(26,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(28,22): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
-tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(33,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(35,22): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
 
 
-==== tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts (10 errors) ====
+==== tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts (4 errors) ====
     function _super() { // No error
     }
     class Foo {
         get prop1(): number {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             function _super() { // No error
             }
             return 10;
         }
         set prop1(val: number) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             function _super() { // No error
             }
         }
     }
     class b extends Foo {
         get prop2(): number {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             function _super() { // Should be error
                      ~~~~~~
 !!! error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
@@ -39,8 +27,6 @@ tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(35,22): error
             return 10;
         }
         set prop2(val: number) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             function _super() { // Should be error
                      ~~~~~~
 !!! error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
@@ -49,8 +35,6 @@ tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(35,22): error
     }
     class c extends Foo {
         get prop2(): number {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x = () => {
                 function _super() { // Should be error
                          ~~~~~~
@@ -60,8 +44,6 @@ tests/cases/compiler/collisionSuperAndLocalFunctionInAccessors.ts(35,22): error
             return 10;
         }
         set prop2(val: number) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x = () => {
                 function _super() { // Should be error
                          ~~~~~~
diff --git a/tests/baselines/reference/collisionSuperAndLocalVarInAccessors.errors.txt b/tests/baselines/reference/collisionSuperAndLocalVarInAccessors.errors.txt
index 7e0f80f0658c7..cfd0839bf543b 100644
--- a/tests/baselines/reference/collisionSuperAndLocalVarInAccessors.errors.txt
+++ b/tests/baselines/reference/collisionSuperAndLocalVarInAccessors.errors.txt
@@ -1,42 +1,28 @@
-tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(7,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(12,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(13,13): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
-tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(16,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(17,13): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
-tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(21,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(23,17): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
-tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(27,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(29,17): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
 
 
-==== tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts (10 errors) ====
+==== tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts (4 errors) ====
     var _super = 10; // No Error
     class Foo {
         get prop1(): number {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var _super = 10; // No error
             return 10;
         }
         set prop1(val: number) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var _super = 10; // No error
         }
     }
     class b extends Foo {
         get prop2(): number {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var _super = 10; // Should be error
                 ~~~~~~
 !!! error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
             return 10;
         }
         set prop2(val: number) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var _super = 10; // Should be error
                 ~~~~~~
 !!! error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
@@ -44,8 +30,6 @@ tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(29,17): error TS240
     }
     class c extends Foo {
         get prop2(): number {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x = () => {
                 var _super = 10; // Should be error
                     ~~~~~~
@@ -54,8 +38,6 @@ tests/cases/compiler/collisionSuperAndLocalVarInAccessors.ts(29,17): error TS240
             return 10;
         }
         set prop2(val: number) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x = () => {
                 var _super = 10; // Should be error
                     ~~~~~~
diff --git a/tests/baselines/reference/collisionSuperAndParameter.errors.txt b/tests/baselines/reference/collisionSuperAndParameter.errors.txt
index 65dddd95d4883..c495d5a9ed3a1 100644
--- a/tests/baselines/reference/collisionSuperAndParameter.errors.txt
+++ b/tests/baselines/reference/collisionSuperAndParameter.errors.txt
@@ -1,7 +1,5 @@
-tests/cases/compiler/collisionSuperAndParameter.ts(12,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndParameter.ts(17,22): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
 tests/cases/compiler/collisionSuperAndParameter.ts(21,7): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
-tests/cases/compiler/collisionSuperAndParameter.ts(26,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionSuperAndParameter.ts(26,11): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
 tests/cases/compiler/collisionSuperAndParameter.ts(32,19): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
 tests/cases/compiler/collisionSuperAndParameter.ts(35,17): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
@@ -9,7 +7,7 @@ tests/cases/compiler/collisionSuperAndParameter.ts(52,17): error TS2401: Duplica
 tests/cases/compiler/collisionSuperAndParameter.ts(57,7): error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
 
 
-==== tests/cases/compiler/collisionSuperAndParameter.ts (9 errors) ====
+==== tests/cases/compiler/collisionSuperAndParameter.ts (7 errors) ====
     class Foo {
         a() {
             var lamda = (_super: number) => { // No Error 
@@ -22,8 +20,6 @@ tests/cases/compiler/collisionSuperAndParameter.ts(57,7): error TS2401: Duplicat
             }
         }
         set c(_super: number) { // No error
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         }
     }
     class Foo2 extends Foo {
@@ -42,8 +38,6 @@ tests/cases/compiler/collisionSuperAndParameter.ts(57,7): error TS2401: Duplicat
             }
         }
         set z(_super: number) { // Error
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
               ~~~~~~~~~~~~~~
 !!! error TS2401: Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.
         }
diff --git a/tests/baselines/reference/collisionThisExpressionAndLocalVarInAccessors.errors.txt b/tests/baselines/reference/collisionThisExpressionAndLocalVarInAccessors.errors.txt
index cbe371c5934b8..1ec1ab96410e3 100644
--- a/tests/baselines/reference/collisionThisExpressionAndLocalVarInAccessors.errors.txt
+++ b/tests/baselines/reference/collisionThisExpressionAndLocalVarInAccessors.errors.txt
@@ -1,18 +1,12 @@
-tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(5,21): error TS2399: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
-tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(12,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(15,21): error TS2399: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
-tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(24,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(25,13): error TS2399: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
-tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(34,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(35,13): error TS2399: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
 
 
-==== tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts (8 errors) ====
+==== tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts (4 errors) ====
     class class1 {
         get a(): number {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x2 = {
                 doStuff: (callback) => () => {
                     var _this = 2;
@@ -25,8 +19,6 @@ tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(35,13): er
             return 10;
         }
         set a(val: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x2 = {
                 doStuff: (callback) => () => {
                     var _this = 2;
@@ -41,8 +33,6 @@ tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(35,13): er
     
     class class2 {
         get a(): number {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var _this = 2;
                 ~~~~~
 !!! error TS2399: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
@@ -55,8 +45,6 @@ tests/cases/compiler/collisionThisExpressionAndLocalVarInAccessors.ts(35,13): er
             return 10;
         }
         set a(val: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var _this = 2;
                 ~~~~~
 !!! error TS2399: Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference.
diff --git a/tests/baselines/reference/commentOnClassAccessor1.errors.txt b/tests/baselines/reference/commentOnClassAccessor1.errors.txt
deleted file mode 100644
index 4ec9a1e1052e8..0000000000000
--- a/tests/baselines/reference/commentOnClassAccessor1.errors.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-tests/cases/compiler/commentOnClassAccessor1.ts(5,7): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/commentOnClassAccessor1.ts (1 errors) ====
-    class C {
-      /**
-       * @type {number}
-       */
-      get bar(): number { return 1;}
-          ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/commentOnClassAccessor1.symbols b/tests/baselines/reference/commentOnClassAccessor1.symbols
new file mode 100644
index 0000000000000..d539344b51014
--- /dev/null
+++ b/tests/baselines/reference/commentOnClassAccessor1.symbols
@@ -0,0 +1,10 @@
+=== tests/cases/compiler/commentOnClassAccessor1.ts ===
+class C {
+>C : Symbol(C, Decl(commentOnClassAccessor1.ts, 0, 0))
+
+  /**
+   * @type {number}
+   */
+  get bar(): number { return 1;}
+>bar : Symbol(C.bar, Decl(commentOnClassAccessor1.ts, 0, 9))
+}
diff --git a/tests/baselines/reference/commentOnClassAccessor1.types b/tests/baselines/reference/commentOnClassAccessor1.types
new file mode 100644
index 0000000000000..afdf3c016b5cf
--- /dev/null
+++ b/tests/baselines/reference/commentOnClassAccessor1.types
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/commentOnClassAccessor1.ts ===
+class C {
+>C : C
+
+  /**
+   * @type {number}
+   */
+  get bar(): number { return 1;}
+>bar : number
+>1 : 1
+}
diff --git a/tests/baselines/reference/commentOnClassAccessor2.errors.txt b/tests/baselines/reference/commentOnClassAccessor2.errors.txt
deleted file mode 100644
index 959a708e05cfc..0000000000000
--- a/tests/baselines/reference/commentOnClassAccessor2.errors.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-tests/cases/compiler/commentOnClassAccessor2.ts(5,7): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/commentOnClassAccessor2.ts(10,7): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/commentOnClassAccessor2.ts (2 errors) ====
-    class C {
-      /**
-       * Getter.
-       */
-      get bar(): number { return 1;}
-          ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-      /**
-       * Setter.
-       */
-      set bar(v) { }
-          ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/commentOnClassAccessor2.symbols b/tests/baselines/reference/commentOnClassAccessor2.symbols
new file mode 100644
index 0000000000000..5eb9acd8309b2
--- /dev/null
+++ b/tests/baselines/reference/commentOnClassAccessor2.symbols
@@ -0,0 +1,17 @@
+=== tests/cases/compiler/commentOnClassAccessor2.ts ===
+class C {
+>C : Symbol(C, Decl(commentOnClassAccessor2.ts, 0, 0))
+
+  /**
+   * Getter.
+   */
+  get bar(): number { return 1;}
+>bar : Symbol(C.bar, Decl(commentOnClassAccessor2.ts, 0, 9), Decl(commentOnClassAccessor2.ts, 4, 32))
+
+  /**
+   * Setter.
+   */
+  set bar(v) { }
+>bar : Symbol(C.bar, Decl(commentOnClassAccessor2.ts, 0, 9), Decl(commentOnClassAccessor2.ts, 4, 32))
+>v : Symbol(v, Decl(commentOnClassAccessor2.ts, 9, 10))
+}
diff --git a/tests/baselines/reference/commentOnClassAccessor2.types b/tests/baselines/reference/commentOnClassAccessor2.types
new file mode 100644
index 0000000000000..34f46135ae641
--- /dev/null
+++ b/tests/baselines/reference/commentOnClassAccessor2.types
@@ -0,0 +1,18 @@
+=== tests/cases/compiler/commentOnClassAccessor2.ts ===
+class C {
+>C : C
+
+  /**
+   * Getter.
+   */
+  get bar(): number { return 1;}
+>bar : number
+>1 : 1
+
+  /**
+   * Setter.
+   */
+  set bar(v) { }
+>bar : number
+>v : number
+}
diff --git a/tests/baselines/reference/commentOnExportEnumDeclaration.js b/tests/baselines/reference/commentOnExportEnumDeclaration.js
index 353b70f4d3c08..7e2b0c9012d06 100644
--- a/tests/baselines/reference/commentOnExportEnumDeclaration.js
+++ b/tests/baselines/reference/commentOnExportEnumDeclaration.js
@@ -8,7 +8,7 @@ export enum Color {
 
 //// [commentOnExportEnumDeclaration.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /**
  * comment
  */
diff --git a/tests/baselines/reference/commentOnImportStatement1.js b/tests/baselines/reference/commentOnImportStatement1.js
index a9d68d299ce19..a62c67e5c7f47 100644
--- a/tests/baselines/reference/commentOnImportStatement1.js
+++ b/tests/baselines/reference/commentOnImportStatement1.js
@@ -8,5 +8,5 @@ import foo = require('./foo');
 /* Copyright */
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/commentOnImportStatement2.js b/tests/baselines/reference/commentOnImportStatement2.js
index 5156fcdd0d1a5..32d1b600503ab 100644
--- a/tests/baselines/reference/commentOnImportStatement2.js
+++ b/tests/baselines/reference/commentOnImportStatement2.js
@@ -4,4 +4,4 @@ import foo = require('./foo');
 
 //// [commentOnImportStatement2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/commentOnImportStatement3.js b/tests/baselines/reference/commentOnImportStatement3.js
index decc7a7878e72..83d1e9c525ec2 100644
--- a/tests/baselines/reference/commentOnImportStatement3.js
+++ b/tests/baselines/reference/commentOnImportStatement3.js
@@ -7,4 +7,4 @@ import foo = require('./foo');
 //// [commentOnImportStatement3.js]
 "use strict";
 /* copyright */
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/commentsBeforeVariableStatement1.js b/tests/baselines/reference/commentsBeforeVariableStatement1.js
index 9a06a3e7c228c..06645ec1529f7 100644
--- a/tests/baselines/reference/commentsBeforeVariableStatement1.js
+++ b/tests/baselines/reference/commentsBeforeVariableStatement1.js
@@ -6,5 +6,5 @@ export var b: number;
 //// [commentsBeforeVariableStatement1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/commonJSImportAsPrimaryExpression.js b/tests/baselines/reference/commonJSImportAsPrimaryExpression.js
index cd62c1583bcff..bbbef2cf48511 100644
--- a/tests/baselines/reference/commonJSImportAsPrimaryExpression.js
+++ b/tests/baselines/reference/commonJSImportAsPrimaryExpression.js
@@ -15,7 +15,7 @@ if(foo.C1.s1){
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C1 = (function () {
     function C1() {
         this.m1 = 42;
@@ -26,7 +26,7 @@ C1.s1 = true;
 exports.C1 = C1;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./foo_0");
 if (foo.C1.s1) {
     // Should cause runtime import
diff --git a/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.js b/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.js
index 5ac0e3fcc649e..584d6b53f7f60 100644
--- a/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.js
+++ b/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.js
@@ -33,7 +33,7 @@ var e: number = <foo.E1>0;
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C1 = (function () {
     function C1() {
         this.m1 = 42;
@@ -50,7 +50,7 @@ var E1;
 })(E1 = exports.E1 || (exports.E1 = {}));
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var i;
 var x = {};
 var y = false;
diff --git a/tests/baselines/reference/commonSourceDir5.js b/tests/baselines/reference/commonSourceDir5.js
index 78517e4e51527..5e1c64c3d819e 100644
--- a/tests/baselines/reference/commonSourceDir5.js
+++ b/tests/baselines/reference/commonSourceDir5.js
@@ -18,18 +18,18 @@ export var y = x * i;
 //// [concat.js]
 define("B:/baz", ["require", "exports", "A:/bar", "A:/foo"], function (require, exports, bar_1, foo_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.pi = Math.PI;
     exports.y = bar_1.x * foo_1.i;
 });
 define("A:/foo", ["require", "exports", "B:/baz"], function (require, exports, baz_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.i = Math.sqrt(-1);
     exports.z = baz_1.pi * baz_1.pi;
 });
 define("A:/bar", ["require", "exports", "A:/foo"], function (require, exports, foo_2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = foo_2.z + foo_2.z;
 });
diff --git a/tests/baselines/reference/commonSourceDir6.js b/tests/baselines/reference/commonSourceDir6.js
index 071953afcdc76..fb225d7408e5e 100644
--- a/tests/baselines/reference/commonSourceDir6.js
+++ b/tests/baselines/reference/commonSourceDir6.js
@@ -18,18 +18,18 @@ export var y = x * i;
 //// [concat.js]
 define("baz", ["require", "exports", "a/bar", "a/foo"], function (require, exports, bar_1, foo_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.pi = Math.PI;
     exports.y = bar_1.x * foo_1.i;
 });
 define("a/foo", ["require", "exports", "baz"], function (require, exports, baz_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.i = Math.sqrt(-1);
     exports.z = baz_1.pi * baz_1.pi;
 });
 define("a/bar", ["require", "exports", "a/foo"], function (require, exports, foo_2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = foo_2.z + foo_2.z;
 });
diff --git a/tests/baselines/reference/commonSourceDirectory.js b/tests/baselines/reference/commonSourceDirectory.js
index 5569ae6d52b77..83c19ba44c2b9 100644
--- a/tests/baselines/reference/commonSourceDirectory.js
+++ b/tests/baselines/reference/commonSourceDirectory.js
@@ -19,7 +19,7 @@ x + y;
 
 //// [/app/bin/index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="../types/bar.d.ts"/>
 var foo_1 = require("foo");
 var bar_1 = require("bar");
diff --git a/tests/baselines/reference/commonSourceDirectory.sourcemap.txt b/tests/baselines/reference/commonSourceDirectory.sourcemap.txt
index c880d2d0059fb..725986497a6d4 100644
--- a/tests/baselines/reference/commonSourceDirectory.sourcemap.txt
+++ b/tests/baselines/reference/commonSourceDirectory.sourcemap.txt
@@ -9,7 +9,7 @@ emittedFile:/app/bin/index.js
 sourceFile:index.ts
 -------------------------------------------------------------------
 >>>"use strict";
->>>exports.__esModule = true;
+>>>Object.defineProperty(exports, "__esModule", { value: true });
 >>>/// <reference path="../types/bar.d.ts"/>
 1 >
 2 >^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/baselines/reference/commonSourceDirectory_dts.js b/tests/baselines/reference/commonSourceDirectory_dts.js
index 249edecedddaa..8396a69745c85 100644
--- a/tests/baselines/reference/commonSourceDirectory_dts.js
+++ b/tests/baselines/reference/commonSourceDirectory_dts.js
@@ -12,7 +12,7 @@ export const x = y;
 
 //// [/app/bin/index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="../lib/bar.d.ts" />
 exports.x = y;
 //# sourceMappingURL=/app/myMapRoot/index.js.map
diff --git a/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt b/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt
index 925a3d30ed4a2..f547bd854262e 100644
--- a/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt
+++ b/tests/baselines/reference/commonSourceDirectory_dts.sourcemap.txt
@@ -9,7 +9,7 @@ emittedFile:/app/bin/index.js
 sourceFile:index.ts
 -------------------------------------------------------------------
 >>>"use strict";
->>>exports.__esModule = true;
+>>>Object.defineProperty(exports, "__esModule", { value: true });
 >>>/// <reference path="../lib/bar.d.ts" />
 1 >
 2 >^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
diff --git a/tests/baselines/reference/complexNarrowingWithAny.js b/tests/baselines/reference/complexNarrowingWithAny.js
index 4531cde9f3ed3..4e8da8a1e58a4 100644
--- a/tests/baselines/reference/complexNarrowingWithAny.js
+++ b/tests/baselines/reference/complexNarrowingWithAny.js
@@ -562,7 +562,7 @@ export function viewFactory_AppComponent0(viewUtils:any,parentInjector:any,decla
 //// [complexNarrowingWithAny.js]
 "use strict";
 // Repro from #10869
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /**
  * This file is generated by the Angular 2 template compiler.
  * Do not edit.
diff --git a/tests/baselines/reference/computedPropertyNames49_ES5.errors.txt b/tests/baselines/reference/computedPropertyNames49_ES5.errors.txt
index 02721368a0dfd..d803e40819626 100644
--- a/tests/baselines/reference/computedPropertyNames49_ES5.errors.txt
+++ b/tests/baselines/reference/computedPropertyNames49_ES5.errors.txt
@@ -1,36 +1,26 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(6,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(9,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(13,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(9,9): error TS1049: A 'set' accessor must have exactly one parameter.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(13,9): error TS2300: Duplicate identifier 'foo'.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(18,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(18,9): error TS1118: An object literal cannot have multiple get/set accessors with the same name.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(18,9): error TS2300: Duplicate identifier 'foo'.
 
 
-==== tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts (8 errors) ====
+==== tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts (4 errors) ====
     var x = {
         p1: 10,
         get [1 + 1]() {
-            ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             throw 10;
         },
         get [1 + 1]() {
-            ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         },
         set [1 + 1]() {
             ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1049: A 'set' accessor must have exactly one parameter.
             // just throw
             throw 10;
         },
         get foo() {
             ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~~
 !!! error TS2300: Duplicate identifier 'foo'.
             if (1 == 1) {
                 return 10;
@@ -38,8 +28,6 @@ tests/cases/conformance/es6/computedProperties/computedPropertyNames49_ES5.ts(18
         },
         get foo() {
             ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~~
 !!! error TS1118: An object literal cannot have multiple get/set accessors with the same name.
             ~~~
 !!! error TS2300: Duplicate identifier 'foo'.
diff --git a/tests/baselines/reference/computedPropertyNames50_ES5.errors.txt b/tests/baselines/reference/computedPropertyNames50_ES5.errors.txt
index 12d3dde29508b..a02485e218ba7 100644
--- a/tests/baselines/reference/computedPropertyNames50_ES5.errors.txt
+++ b/tests/baselines/reference/computedPropertyNames50_ES5.errors.txt
@@ -1,45 +1,33 @@
-tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(3,9): error TS2300: Duplicate identifier 'foo'.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(8,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(11,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(18,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(11,9): error TS1049: A 'set' accessor must have exactly one parameter.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(18,9): error TS1118: An object literal cannot have multiple get/set accessors with the same name.
 tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts(18,9): error TS2300: Duplicate identifier 'foo'.
 
 
-==== tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts (8 errors) ====
+==== tests/cases/conformance/es6/computedProperties/computedPropertyNames50_ES5.ts (4 errors) ====
     var x = {
         p1: 10,
         get foo() {
             ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~~
 !!! error TS2300: Duplicate identifier 'foo'.
             if (1 == 1) {
                 return 10;
             }
         },
         get [1 + 1]() {
-            ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             throw 10;
         },
         set [1 + 1]() {
             ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1049: A 'set' accessor must have exactly one parameter.
             // just throw
             throw 10;
         },
         get [1 + 1]() {
-            ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         },
         get foo() {
             ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~~
 !!! error TS1118: An object literal cannot have multiple get/set accessors with the same name.
             ~~~
 !!! error TS2300: Duplicate identifier 'foo'.
diff --git a/tests/baselines/reference/constEnumExternalModule.js b/tests/baselines/reference/constEnumExternalModule.js
index 8ea5625ac0797..fe029f2c9f5af 100644
--- a/tests/baselines/reference/constEnumExternalModule.js
+++ b/tests/baselines/reference/constEnumExternalModule.js
@@ -13,11 +13,11 @@ var v = A.V;
 //// [m1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [m2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var v = 100 /* V */;
 });
diff --git a/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.js b/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.js
index 8e9dc6da68831..a747d54ec126a 100644
--- a/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.js
+++ b/tests/baselines/reference/constructorWithIncompleteTypeAnnotation.js
@@ -296,7 +296,7 @@ var TypeScriptAllInOne;
 (function (TypeScriptAllInOne) {
     var Program = (function () {
         function Program() {
-            this["case"] = bfs.STATEMENTS(4);
+            this.case = bfs.STATEMENTS(4);
         }
         Program.Main = function () {
             var args = [];
@@ -309,13 +309,13 @@ var TypeScriptAllInOne;
                 retValue = bfs.VARIABLES();
                 if (retValue != 0)
                      ^= {
-                        "return": 1
+                        return: 1
                     };
             }
             finally {
             }
         };
-        Program.prototype["if"] = function (retValue) {
+        Program.prototype.if = function (retValue) {
             if (retValue === void 0) { retValue =  != 0; }
             return 1;
                 ^
@@ -331,7 +331,7 @@ var TypeScriptAllInOne;
                 return 1;
             }
         };
-        Program.prototype["catch"] = function (e) {
+        Program.prototype.catch = function (e) {
             console.log(e);
         };
         return Program;
@@ -368,7 +368,7 @@ var BasicFeatures = (function () {
         ;
         var quoted = '"', quoted2 = "'";
         var reg = /\w*/;
-        var objLit = { "var": number = 42, equals: function (x) { return x["var"] === 42; }, "instanceof": function () { return 'objLit{42}'; } };
+        var objLit = { "var": number = 42, equals: function (x) { return x["var"] === 42; }, instanceof: function () { return 'objLit{42}'; } };
         var weekday = Weekdays.Monday;
         var con = char + f + hexchar + float.toString() + float2.toString() + reg.toString() + objLit + weekday;
         //
diff --git a/tests/baselines/reference/contextualTypingOfAccessors.errors.txt b/tests/baselines/reference/contextualTypingOfAccessors.errors.txt
deleted file mode 100644
index 8d5b732d5f7a9..0000000000000
--- a/tests/baselines/reference/contextualTypingOfAccessors.errors.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-tests/cases/compiler/contextualTypingOfAccessors.ts(8,8): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/contextualTypingOfAccessors.ts(11,8): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/contextualTypingOfAccessors.ts (2 errors) ====
-    // not contextually typing accessors
-    
-    var x: {
-       foo: (x: number) => number;
-    }
-     
-    x = {
-       get foo() {
-           ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-          return (n)=>n
-       },
-       set foo(x) {}
-           ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/contextualTypingOfAccessors.symbols b/tests/baselines/reference/contextualTypingOfAccessors.symbols
new file mode 100644
index 0000000000000..da1cfd0178ada
--- /dev/null
+++ b/tests/baselines/reference/contextualTypingOfAccessors.symbols
@@ -0,0 +1,27 @@
+=== tests/cases/compiler/contextualTypingOfAccessors.ts ===
+// not contextually typing accessors
+
+var x: {
+>x : Symbol(x, Decl(contextualTypingOfAccessors.ts, 2, 3))
+
+   foo: (x: number) => number;
+>foo : Symbol(foo, Decl(contextualTypingOfAccessors.ts, 2, 8))
+>x : Symbol(x, Decl(contextualTypingOfAccessors.ts, 3, 9))
+}
+ 
+x = {
+>x : Symbol(x, Decl(contextualTypingOfAccessors.ts, 2, 3))
+
+   get foo() {
+>foo : Symbol(foo, Decl(contextualTypingOfAccessors.ts, 6, 5), Decl(contextualTypingOfAccessors.ts, 9, 5))
+
+      return (n)=>n
+>n : Symbol(n, Decl(contextualTypingOfAccessors.ts, 8, 14))
+>n : Symbol(n, Decl(contextualTypingOfAccessors.ts, 8, 14))
+
+   },
+   set foo(x) {}
+>foo : Symbol(foo, Decl(contextualTypingOfAccessors.ts, 6, 5), Decl(contextualTypingOfAccessors.ts, 9, 5))
+>x : Symbol(x, Decl(contextualTypingOfAccessors.ts, 10, 11))
+}
+
diff --git a/tests/baselines/reference/contextualTypingOfAccessors.types b/tests/baselines/reference/contextualTypingOfAccessors.types
new file mode 100644
index 0000000000000..3dff909e3c1d3
--- /dev/null
+++ b/tests/baselines/reference/contextualTypingOfAccessors.types
@@ -0,0 +1,30 @@
+=== tests/cases/compiler/contextualTypingOfAccessors.ts ===
+// not contextually typing accessors
+
+var x: {
+>x : { foo: (x: number) => number; }
+
+   foo: (x: number) => number;
+>foo : (x: number) => number
+>x : number
+}
+ 
+x = {
+>x = {   get foo() {      return (n)=>n   },   set foo(x) {}} : { foo: (n: any) => any; }
+>x : { foo: (x: number) => number; }
+>{   get foo() {      return (n)=>n   },   set foo(x) {}} : { foo: (n: any) => any; }
+
+   get foo() {
+>foo : (n: any) => any
+
+      return (n)=>n
+>(n)=>n : (n: any) => any
+>n : any
+>n : any
+
+   },
+   set foo(x) {}
+>foo : (n: any) => any
+>x : (n: any) => any
+}
+
diff --git a/tests/baselines/reference/contextuallyTypedStringLiteralsInJsxAttributes02.js b/tests/baselines/reference/contextuallyTypedStringLiteralsInJsxAttributes02.js
index 9eb261b9d7a23..47ee7f8b6205a 100644
--- a/tests/baselines/reference/contextuallyTypedStringLiteralsInJsxAttributes02.js
+++ b/tests/baselines/reference/contextuallyTypedStringLiteralsInJsxAttributes02.js
@@ -40,7 +40,7 @@ const d1 = <NoOverload1 {...{goTo:"home"}} extra  />;  // goTo has type "home" |
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function MainButton(props) {
         var linkProps = props;
         if (linkProps.goTo) {
diff --git a/tests/baselines/reference/controlFlowBinaryOrExpression.js b/tests/baselines/reference/controlFlowBinaryOrExpression.js
index 752479cf4e9b2..982d7150113a7 100644
--- a/tests/baselines/reference/controlFlowBinaryOrExpression.js
+++ b/tests/baselines/reference/controlFlowBinaryOrExpression.js
@@ -38,7 +38,7 @@ if (isNodeList(sourceObj) || isHTMLCollection(sourceObj)) {
 
 //// [controlFlowBinaryOrExpression.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 var cond;
 (x = "") || (x = 0);
diff --git a/tests/baselines/reference/controlFlowPropertyDeclarations.js b/tests/baselines/reference/controlFlowPropertyDeclarations.js
index ab286b27f06ef..22ca0457f8620 100644
--- a/tests/baselines/reference/controlFlowPropertyDeclarations.js
+++ b/tests/baselines/reference/controlFlowPropertyDeclarations.js
@@ -151,7 +151,7 @@ export class StyleParser {
 //// [controlFlowPropertyDeclarations.js]
 "use strict";
 // Repro from ##8913
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var HTMLDOMPropertyConfig = require('react/lib/HTMLDOMPropertyConfig');
 // Populate property map with ReactJS's attribute and property mappings
 // TODO handle/use .Properties value eg: MUST_USE_PROPERTY is not HTML attr
diff --git a/tests/baselines/reference/controlFlowSelfReferentialLoop.js b/tests/baselines/reference/controlFlowSelfReferentialLoop.js
index 4781f2776fbf5..9ef6ee95ea999 100644
--- a/tests/baselines/reference/controlFlowSelfReferentialLoop.js
+++ b/tests/baselines/reference/controlFlowSelfReferentialLoop.js
@@ -103,7 +103,7 @@ export default md5;
 //// [controlFlowSelfReferentialLoop.js]
 "use strict";
 // Repro from #12319
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function md5(string) {
     function FF(a, b, c, d, x, s, ac) {
         return 0;
@@ -203,4 +203,4 @@ function md5(string) {
         b = II(b, c, d, a, x[k + 9], S44, 0xEB86D391);
     }
 }
-exports["default"] = md5;
+exports.default = md5;
diff --git a/tests/baselines/reference/convertKeywordsYes.js b/tests/baselines/reference/convertKeywordsYes.js
index b7bd60e4a9535..ba3c661d1d031 100644
--- a/tests/baselines/reference/convertKeywordsYes.js
+++ b/tests/baselines/reference/convertKeywordsYes.js
@@ -344,43 +344,43 @@ var bigObject = {
     string: 0,
     get: 0,
     yield: 0,
-    "break": 0,
-    "case": 0,
-    "catch": 0,
-    "class": 0,
-    "continue": 0,
-    "const": 0,
-    "debugger": 0,
+    break: 0,
+    case: 0,
+    catch: 0,
+    class: 0,
+    continue: 0,
+    const: 0,
+    debugger: 0,
     declare: 0,
-    "default": 0,
-    "delete": 0,
-    "do": 0,
-    "else": 0,
-    "enum": 0,
-    "export": 0,
-    "extends": 0,
-    "false": 0,
-    "finally": 0,
-    "for": 0,
-    "function": 0,
-    "if": 0,
-    "import": 0,
-    "in": 0,
-    "instanceof": 0,
-    "new": 0,
-    "null": 0,
-    "return": 0,
-    "super": 0,
-    "switch": 0,
-    "this": 0,
-    "throw": 0,
-    "true": 0,
-    "try": 0,
-    "typeof": 0,
-    "var": 0,
-    "void": 0,
-    "while": 0,
-    "with": 0
+    default: 0,
+    delete: 0,
+    do: 0,
+    else: 0,
+    enum: 0,
+    export: 0,
+    extends: 0,
+    false: 0,
+    finally: 0,
+    for: 0,
+    function: 0,
+    if: 0,
+    import: 0,
+    in: 0,
+    instanceof: 0,
+    new: 0,
+    null: 0,
+    return: 0,
+    super: 0,
+    switch: 0,
+    this: 0,
+    throw: 0,
+    true: 0,
+    try: 0,
+    typeof: 0,
+    var: 0,
+    void: 0,
+    while: 0,
+    with: 0
 };
 var bigClass = (function () {
     function bigClass() {
@@ -401,43 +401,43 @@ var bigClass = (function () {
         this.string = 0;
         this.get = 0;
         this.yield = 0;
-        this["break"] = 0;
-        this["case"] = 0;
-        this["catch"] = 0;
-        this["class"] = 0;
-        this["continue"] = 0;
-        this["const"] = 0;
-        this["debugger"] = 0;
+        this.break = 0;
+        this.case = 0;
+        this.catch = 0;
+        this.class = 0;
+        this.continue = 0;
+        this.const = 0;
+        this.debugger = 0;
         this.declare = 0;
-        this["default"] = 0;
-        this["delete"] = 0;
-        this["do"] = 0;
-        this["else"] = 0;
-        this["enum"] = 0;
-        this["export"] = 0;
-        this["extends"] = 0;
-        this["false"] = 0;
-        this["finally"] = 0;
-        this["for"] = 0;
-        this["function"] = 0;
-        this["if"] = 0;
-        this["import"] = 0;
-        this["in"] = 0;
-        this["instanceof"] = 0;
-        this["new"] = 0;
-        this["null"] = 0;
-        this["return"] = 0;
-        this["super"] = 0;
-        this["switch"] = 0;
-        this["this"] = 0;
-        this["throw"] = 0;
-        this["true"] = 0;
-        this["try"] = 0;
-        this["typeof"] = 0;
-        this["var"] = 0;
-        this["void"] = 0;
-        this["while"] = 0;
-        this["with"] = 0;
+        this.default = 0;
+        this.delete = 0;
+        this.do = 0;
+        this.else = 0;
+        this.enum = 0;
+        this.export = 0;
+        this.extends = 0;
+        this.false = 0;
+        this.finally = 0;
+        this.for = 0;
+        this.function = 0;
+        this.if = 0;
+        this.import = 0;
+        this.in = 0;
+        this.instanceof = 0;
+        this.new = 0;
+        this.null = 0;
+        this.return = 0;
+        this.super = 0;
+        this.switch = 0;
+        this.this = 0;
+        this.throw = 0;
+        this.true = 0;
+        this.try = 0;
+        this.typeof = 0;
+        this.var = 0;
+        this.void = 0;
+        this.while = 0;
+        this.with = 0;
     }
     return bigClass;
 }());
diff --git a/tests/baselines/reference/copyrightWithNewLine1.js b/tests/baselines/reference/copyrightWithNewLine1.js
index f7c1ac602dd6d..e055de43ac712 100644
--- a/tests/baselines/reference/copyrightWithNewLine1.js
+++ b/tests/baselines/reference/copyrightWithNewLine1.js
@@ -15,7 +15,7 @@ greeter.start();
 ****************************/
 define(["require", "exports", "./greeter"], function (require, exports, model) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var el = document.getElementById('content');
     var greeter = new model.Greeter(el);
     /** things */
diff --git a/tests/baselines/reference/copyrightWithoutNewLine1.js b/tests/baselines/reference/copyrightWithoutNewLine1.js
index 0f479c3db7f26..cf4317b8df0d9 100644
--- a/tests/baselines/reference/copyrightWithoutNewLine1.js
+++ b/tests/baselines/reference/copyrightWithoutNewLine1.js
@@ -11,7 +11,7 @@ greeter.start();
 //// [copyrightWithoutNewLine1.js]
 define(["require", "exports", "./greeter"], function (require, exports, model) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var el = document.getElementById('content');
     var greeter = new model.Greeter(el);
     /** things */
diff --git a/tests/baselines/reference/crashIntypeCheckInvocationExpression.js b/tests/baselines/reference/crashIntypeCheckInvocationExpression.js
index d555d3f3bcafe..5cc253fbacb33 100644
--- a/tests/baselines/reference/crashIntypeCheckInvocationExpression.js
+++ b/tests/baselines/reference/crashIntypeCheckInvocationExpression.js
@@ -15,7 +15,7 @@ export var compileServer = task<number, number, any>(<P0, P1, P2>() => {
 //// [crashIntypeCheckInvocationExpression.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var nake;
     function doCompile(fileset, moduleType) {
         return undefined;
diff --git a/tests/baselines/reference/crashIntypeCheckObjectCreationExpression.js b/tests/baselines/reference/crashIntypeCheckObjectCreationExpression.js
index a115e7ab0a3aa..470a106b0f533 100644
--- a/tests/baselines/reference/crashIntypeCheckObjectCreationExpression.js
+++ b/tests/baselines/reference/crashIntypeCheckObjectCreationExpression.js
@@ -11,7 +11,7 @@ export class BuildWorkspaceService {
 //// [crashIntypeCheckObjectCreationExpression.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var BuildWorkspaceService = (function () {
         function BuildWorkspaceService() {
         }
diff --git a/tests/baselines/reference/declFileAliasUseBeforeDeclaration.js b/tests/baselines/reference/declFileAliasUseBeforeDeclaration.js
index 2269f85996f92..4d16599c330e2 100644
--- a/tests/baselines/reference/declFileAliasUseBeforeDeclaration.js
+++ b/tests/baselines/reference/declFileAliasUseBeforeDeclaration.js
@@ -9,7 +9,7 @@ import foo = require("./declFileAliasUseBeforeDeclaration_foo");
 
 //// [declFileAliasUseBeforeDeclaration_foo.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = (function () {
     function Foo() {
     }
@@ -18,7 +18,7 @@ var Foo = (function () {
 exports.Foo = Foo;
 //// [declFileAliasUseBeforeDeclaration_test.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function bar(a) { }
 exports.bar = bar;
 
diff --git a/tests/baselines/reference/declFileAmbientExternalModuleWithSingleExportedModule.js b/tests/baselines/reference/declFileAmbientExternalModuleWithSingleExportedModule.js
index 627a1865d8fc8..37ac0e5c020a3 100644
--- a/tests/baselines/reference/declFileAmbientExternalModuleWithSingleExportedModule.js
+++ b/tests/baselines/reference/declFileAmbientExternalModuleWithSingleExportedModule.js
@@ -20,7 +20,7 @@ export var x: SubModule.m.m3.c;
 //// [declFileAmbientExternalModuleWithSingleExportedModule_0.js]
 //// [declFileAmbientExternalModuleWithSingleExportedModule_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 
 
 //// [declFileAmbientExternalModuleWithSingleExportedModule_0.d.ts]
diff --git a/tests/baselines/reference/declFileClassWithStaticMethodReturningConstructor.js b/tests/baselines/reference/declFileClassWithStaticMethodReturningConstructor.js
index 4ac309c1a6b21..eb0907fd2b7e5 100644
--- a/tests/baselines/reference/declFileClassWithStaticMethodReturningConstructor.js
+++ b/tests/baselines/reference/declFileClassWithStaticMethodReturningConstructor.js
@@ -7,7 +7,7 @@ export class Enhancement {
 
 //// [declFileClassWithStaticMethodReturningConstructor.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Enhancement = (function () {
     function Enhancement() {
     }
diff --git a/tests/baselines/reference/declFileExportAssignmentOfGenericInterface.js b/tests/baselines/reference/declFileExportAssignmentOfGenericInterface.js
index cefff0be4eac9..7a6f0d0c95048 100644
--- a/tests/baselines/reference/declFileExportAssignmentOfGenericInterface.js
+++ b/tests/baselines/reference/declFileExportAssignmentOfGenericInterface.js
@@ -14,12 +14,12 @@ x.a;
 //// [declFileExportAssignmentOfGenericInterface_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [declFileExportAssignmentOfGenericInterface_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x.a;
 });
 
diff --git a/tests/baselines/reference/declFileExportImportChain.js b/tests/baselines/reference/declFileExportImportChain.js
index fe1b36d76fa48..d67b13ff17b43 100644
--- a/tests/baselines/reference/declFileExportImportChain.js
+++ b/tests/baselines/reference/declFileExportImportChain.js
@@ -43,7 +43,7 @@ define(["require", "exports"], function (require, exports) {
 //// [declFileExportImportChain_b.js]
 define(["require", "exports", "declFileExportImportChain_a"], function (require, exports, a) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = a;
 });
 //// [declFileExportImportChain_b1.js]
@@ -54,13 +54,13 @@ define(["require", "exports", "declFileExportImportChain_b"], function (require,
 //// [declFileExportImportChain_c.js]
 define(["require", "exports", "declFileExportImportChain_b1"], function (require, exports, b1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.b1 = b1;
 });
 //// [declFileExportImportChain_d.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/declFileExportImportChain2.js b/tests/baselines/reference/declFileExportImportChain2.js
index ec7629ebed13b..41ae21434efb4 100644
--- a/tests/baselines/reference/declFileExportImportChain2.js
+++ b/tests/baselines/reference/declFileExportImportChain2.js
@@ -45,13 +45,13 @@ define(["require", "exports", "declFileExportImportChain2_a"], function (require
 //// [declFileExportImportChain2_c.js]
 define(["require", "exports", "declFileExportImportChain2_b"], function (require, exports, b) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.b = b;
 });
 //// [declFileExportImportChain2_d.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/declFileForExportedImport.js b/tests/baselines/reference/declFileForExportedImport.js
index 809f01878d4a9..6e0421f22d9f0 100644
--- a/tests/baselines/reference/declFileForExportedImport.js
+++ b/tests/baselines/reference/declFileForExportedImport.js
@@ -13,10 +13,10 @@ var z = b.x;
 
 //// [declFileForExportedImport_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [declFileForExportedImport_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='declFileForExportedImport_0.ts'/>
 exports.a = require("./declFileForExportedImport_0");
 var y = exports.a.x;
diff --git a/tests/baselines/reference/declFileGenericType.js b/tests/baselines/reference/declFileGenericType.js
index f56abaf6b97d7..fe5d23925f146 100644
--- a/tests/baselines/reference/declFileGenericType.js
+++ b/tests/baselines/reference/declFileGenericType.js
@@ -51,7 +51,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C;
 (function (C) {
     var A = (function () {
diff --git a/tests/baselines/reference/declFileImportModuleWithExportAssignment.js b/tests/baselines/reference/declFileImportModuleWithExportAssignment.js
index 5215d3d1431a5..a648ee957805d 100644
--- a/tests/baselines/reference/declFileImportModuleWithExportAssignment.js
+++ b/tests/baselines/reference/declFileImportModuleWithExportAssignment.js
@@ -31,7 +31,7 @@ var m2;
 module.exports = m2;
 //// [declFileImportModuleWithExportAssignment_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /**This is on import declaration*/
 var a1 = require("./declFileImportModuleWithExportAssignment_0");
 exports.a = a1;
diff --git a/tests/baselines/reference/declarationEmitExpressionInExtends3.js b/tests/baselines/reference/declarationEmitExpressionInExtends3.js
index 7cc58772ec23f..5cb5b39554687 100644
--- a/tests/baselines/reference/declarationEmitExpressionInExtends3.js
+++ b/tests/baselines/reference/declarationEmitExpressionInExtends3.js
@@ -54,7 +54,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ExportedClass = (function () {
     function ExportedClass() {
     }
diff --git a/tests/baselines/reference/declarationEmitIdentifierPredicates01.js b/tests/baselines/reference/declarationEmitIdentifierPredicates01.js
index 5bf62608fb81e..81bb5936b9418 100644
--- a/tests/baselines/reference/declarationEmitIdentifierPredicates01.js
+++ b/tests/baselines/reference/declarationEmitIdentifierPredicates01.js
@@ -5,7 +5,7 @@ export function f(x: any): x is number {
 
 //// [declarationEmitIdentifierPredicates01.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function f(x) {
     return typeof x === "number";
 }
diff --git a/tests/baselines/reference/declarationEmitIdentifierPredicatesWithPrivateName01.js b/tests/baselines/reference/declarationEmitIdentifierPredicatesWithPrivateName01.js
index 74da01ce683ca..cafd3bbaaebec 100644
--- a/tests/baselines/reference/declarationEmitIdentifierPredicatesWithPrivateName01.js
+++ b/tests/baselines/reference/declarationEmitIdentifierPredicatesWithPrivateName01.js
@@ -9,7 +9,7 @@ export function f(x: any): x is I {
 
 //// [declarationEmitIdentifierPredicatesWithPrivateName01.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function f(x) {
     return typeof x.a === "number";
 }
diff --git a/tests/baselines/reference/declarationEmitIndexTypeNotFound.js b/tests/baselines/reference/declarationEmitIndexTypeNotFound.js
index f28f33f88e6f0..6f7639a08cab5 100644
--- a/tests/baselines/reference/declarationEmitIndexTypeNotFound.js
+++ b/tests/baselines/reference/declarationEmitIndexTypeNotFound.js
@@ -6,4 +6,4 @@ export interface Test {
 
 //// [declarationEmitIndexTypeNotFound.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/declarationEmitInferedDefaultExportType.js b/tests/baselines/reference/declarationEmitInferedDefaultExportType.js
index a9eca8d11617a..0ed3ada5c7c74 100644
--- a/tests/baselines/reference/declarationEmitInferedDefaultExportType.js
+++ b/tests/baselines/reference/declarationEmitInferedDefaultExportType.js
@@ -8,9 +8,9 @@ export default {
 
 //// [declarationEmitInferedDefaultExportType.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // test.ts
-exports["default"] = {
+exports.default = {
     foo: [],
     bar: undefined,
     baz: null
diff --git a/tests/baselines/reference/declarationEmitInferedTypeAlias1.js b/tests/baselines/reference/declarationEmitInferedTypeAlias1.js
index 091e7f97a0efe..d07655587b86f 100644
--- a/tests/baselines/reference/declarationEmitInferedTypeAlias1.js
+++ b/tests/baselines/reference/declarationEmitInferedTypeAlias1.js
@@ -13,13 +13,13 @@ export { v }
 
 //// [0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 {
     var obj = true;
 }
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var v = "str" || true;
 exports.v = v;
 
diff --git a/tests/baselines/reference/declarationEmitInferedTypeAlias2.js b/tests/baselines/reference/declarationEmitInferedTypeAlias2.js
index d99a1abc34621..6000a36093d0a 100644
--- a/tests/baselines/reference/declarationEmitInferedTypeAlias2.js
+++ b/tests/baselines/reference/declarationEmitInferedTypeAlias2.js
@@ -16,13 +16,13 @@ export { v, bar }
 
 //// [0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 {
     var obj = true;
 }
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var v = "str" || true;
 exports.v = v;
 function bar() {
diff --git a/tests/baselines/reference/declarationEmitInferedTypeAlias3.js b/tests/baselines/reference/declarationEmitInferedTypeAlias3.js
index 4621aa8db2fa1..543bc71b13133 100644
--- a/tests/baselines/reference/declarationEmitInferedTypeAlias3.js
+++ b/tests/baselines/reference/declarationEmitInferedTypeAlias3.js
@@ -13,15 +13,15 @@ export default x;
 
 //// [0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 {
     var obj = true;
 }
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = "hi" || 5;
-exports["default"] = x;
+exports.default = x;
 
 
 //// [0.d.ts]
diff --git a/tests/baselines/reference/declarationEmitInferedTypeAlias5.js b/tests/baselines/reference/declarationEmitInferedTypeAlias5.js
index a20c4da52e099..e3328f16f1a72 100644
--- a/tests/baselines/reference/declarationEmitInferedTypeAlias5.js
+++ b/tests/baselines/reference/declarationEmitInferedTypeAlias5.js
@@ -12,11 +12,11 @@ export { v }
 
 //// [0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var obj = true;
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //let v2: Z.Data;
 var v = "str" || true;
 exports.v = v;
diff --git a/tests/baselines/reference/declarationEmitInferedTypeAlias6.js b/tests/baselines/reference/declarationEmitInferedTypeAlias6.js
index 0b98e0bdeb03b..b3f68d92266d4 100644
--- a/tests/baselines/reference/declarationEmitInferedTypeAlias6.js
+++ b/tests/baselines/reference/declarationEmitInferedTypeAlias6.js
@@ -13,13 +13,13 @@ export { v }
 
 //// [0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 {
     var obj = true;
 }
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var v = "str" || true;
 exports.v = v;
 
diff --git a/tests/baselines/reference/declarationEmitInferedTypeAlias7.js b/tests/baselines/reference/declarationEmitInferedTypeAlias7.js
index 187913b0fd81e..85e9a1f00675d 100644
--- a/tests/baselines/reference/declarationEmitInferedTypeAlias7.js
+++ b/tests/baselines/reference/declarationEmitInferedTypeAlias7.js
@@ -10,11 +10,11 @@ export { v }
 
 //// [0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var obj = true;
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var v = "str" || true;
 exports.v = v;
 
diff --git a/tests/baselines/reference/declarationEmitInferedTypeAlias9.js b/tests/baselines/reference/declarationEmitInferedTypeAlias9.js
index 3f237f2dc44c9..7c4a6aeb2e08a 100644
--- a/tests/baselines/reference/declarationEmitInferedTypeAlias9.js
+++ b/tests/baselines/reference/declarationEmitInferedTypeAlias9.js
@@ -8,7 +8,7 @@ export function returnSomeGlobalValue() {
 
 //// [declarationEmitInferedTypeAlias9.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 function returnSomeGlobalValue() {
     return x;
diff --git a/tests/baselines/reference/declarationEmitInvalidExport.js b/tests/baselines/reference/declarationEmitInvalidExport.js
index be71312b98eab..c2d81fe723a3d 100644
--- a/tests/baselines/reference/declarationEmitInvalidExport.js
+++ b/tests/baselines/reference/declarationEmitInvalidExport.js
@@ -8,7 +8,7 @@ export type MyClass = typeof myClass;
 
 //// [declarationEmitInvalidExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 if (false) {
     export var myClass = 0;
 }
diff --git a/tests/baselines/reference/declarationEmitNameConflicts.js b/tests/baselines/reference/declarationEmitNameConflicts.js
index 5440f3d358400..05a027d6921f5 100644
--- a/tests/baselines/reference/declarationEmitNameConflicts.js
+++ b/tests/baselines/reference/declarationEmitNameConflicts.js
@@ -63,7 +63,7 @@ var f;
 module.exports = f;
 //// [declarationEmit_nameConflicts_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var im = require("./declarationEmit_nameConflicts_1");
 var M;
 (function (M) {
diff --git a/tests/baselines/reference/declarationEmitNameConflictsWithAlias.js b/tests/baselines/reference/declarationEmitNameConflictsWithAlias.js
index 4b4aca4f4b2d3..b3718dcbb8763 100644
--- a/tests/baselines/reference/declarationEmitNameConflictsWithAlias.js
+++ b/tests/baselines/reference/declarationEmitNameConflictsWithAlias.js
@@ -8,7 +8,7 @@ export module M {
 
 //// [declarationEmitNameConflictsWithAlias.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var M;
 (function (M) {
 })(M = exports.M || (exports.M = {}));
diff --git a/tests/baselines/reference/declarationEmitThisPredicates01.js b/tests/baselines/reference/declarationEmitThisPredicates01.js
index 70ed3147a9e06..0dca441abbe6f 100644
--- a/tests/baselines/reference/declarationEmitThisPredicates01.js
+++ b/tests/baselines/reference/declarationEmitThisPredicates01.js
@@ -20,7 +20,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/declarationEmitThisPredicates02.js b/tests/baselines/reference/declarationEmitThisPredicates02.js
index f763a1cba46be..914bfd8be5d31 100644
--- a/tests/baselines/reference/declarationEmitThisPredicates02.js
+++ b/tests/baselines/reference/declarationEmitThisPredicates02.js
@@ -14,7 +14,7 @@ export const obj = {
 
 //// [declarationEmitThisPredicates02.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.obj = {
     m: function () {
         var dis = this;
diff --git a/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName01.js b/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName01.js
index e7c4c9998b914..9ba9ec715e46d 100644
--- a/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName01.js
+++ b/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName01.js
@@ -20,7 +20,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName02.js b/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName02.js
index 86fb2e0560711..469f28bada8d9 100644
--- a/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName02.js
+++ b/tests/baselines/reference/declarationEmitThisPredicatesWithPrivateName02.js
@@ -14,7 +14,7 @@ export const obj = {
 
 //// [declarationEmitThisPredicatesWithPrivateName02.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.obj = {
     m: function () {
         var dis = this;
diff --git a/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters1.js b/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters1.js
index d2110bea4fe9f..e376f7fd632a3 100644
--- a/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters1.js
+++ b/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters1.js
@@ -5,7 +5,7 @@ export const y = (x: Foo<string>) => 1
 
 //// [declarationEmitTypeAliasWithTypeParameters1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.y = function (x) { return 1; };
 
 
diff --git a/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters2.js b/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters2.js
index 5c76056ac622b..adf443a49ce55 100644
--- a/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters2.js
+++ b/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters2.js
@@ -6,7 +6,7 @@ export const y = (x: Baa<number>) => 1
 
 //// [declarationEmitTypeAliasWithTypeParameters2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.y = function (x) { return 1; };
 
 
diff --git a/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters5.js b/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters5.js
index cee701c045588..6b4f4709164f4 100644
--- a/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters5.js
+++ b/tests/baselines/reference/declarationEmitTypeAliasWithTypeParameters5.js
@@ -11,7 +11,7 @@ function foo() {
 
 //// [declarationEmitTypeAliasWithTypeParameters5.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() {
     return {};
 }
diff --git a/tests/baselines/reference/declarationMerging2.js b/tests/baselines/reference/declarationMerging2.js
index b360d9af3f770..443fd8b47c4f6 100644
--- a/tests/baselines/reference/declarationMerging2.js
+++ b/tests/baselines/reference/declarationMerging2.js
@@ -17,7 +17,7 @@ declare module "./a" {
 //// [a.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -29,5 +29,5 @@ define(["require", "exports"], function (require, exports) {
 //// [b.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/decoratorOnImportEquals2.js b/tests/baselines/reference/decoratorOnImportEquals2.js
index aa8273699e38e..f37056ee60d2c 100644
--- a/tests/baselines/reference/decoratorOnImportEquals2.js
+++ b/tests/baselines/reference/decoratorOnImportEquals2.js
@@ -11,7 +11,7 @@ declare function dec<T>(target: T): T;
 
 //// [decoratorOnImportEquals2_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [decoratorOnImportEquals2_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/decoratorWithUnderscoreMethod.js b/tests/baselines/reference/decoratorWithUnderscoreMethod.js
index 9ac2a88aa5162..f2b505a979cdc 100644
--- a/tests/baselines/reference/decoratorWithUnderscoreMethod.js
+++ b/tests/baselines/reference/decoratorWithUnderscoreMethod.js
@@ -33,4 +33,4 @@ var A = (function () {
 }());
 __decorate([
     dec()
-], A.prototype, "__foo");
+], A.prototype, "__foo", null);
diff --git a/tests/baselines/reference/dependencyViaImportAlias.js b/tests/baselines/reference/dependencyViaImportAlias.js
index 285cfbcda16e6..63376250c9cd3 100644
--- a/tests/baselines/reference/dependencyViaImportAlias.js
+++ b/tests/baselines/reference/dependencyViaImportAlias.js
@@ -13,7 +13,7 @@ export = A;
 //// [A.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
diff --git a/tests/baselines/reference/derivedClassFunctionOverridesBaseClassAccessor.errors.txt b/tests/baselines/reference/derivedClassFunctionOverridesBaseClassAccessor.errors.txt
index f8e237a83ceb0..a6d614a282404 100644
--- a/tests/baselines/reference/derivedClassFunctionOverridesBaseClassAccessor.errors.txt
+++ b/tests/baselines/reference/derivedClassFunctionOverridesBaseClassAccessor.errors.txt
@@ -1,21 +1,15 @@
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassFunctionOverridesBaseClassAccessor.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassFunctionOverridesBaseClassAccessor.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassFunctionOverridesBaseClassAccessor.ts(10,7): error TS2415: Class 'Derived' incorrectly extends base class 'Base'.
   Types of property 'x' are incompatible.
     Type '() => number' is not assignable to type 'number'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassFunctionOverridesBaseClassAccessor.ts(11,5): error TS2426: Class 'Base' defines instance member accessor 'x', but extended class 'Derived' defines it as instance member function.
 
 
-==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassFunctionOverridesBaseClassAccessor.ts (4 errors) ====
+==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassFunctionOverridesBaseClassAccessor.ts (2 errors) ====
     class Base {
         get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 1;
         }
         set x(v) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         }
     }
     
diff --git a/tests/baselines/reference/derivedClassIncludesInheritedMembers.errors.txt b/tests/baselines/reference/derivedClassIncludesInheritedMembers.errors.txt
deleted file mode 100644
index f8e52d3e57514..0000000000000
--- a/tests/baselines/reference/derivedClassIncludesInheritedMembers.errors.txt
+++ /dev/null
@@ -1,55 +0,0 @@
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassIncludesInheritedMembers.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassIncludesInheritedMembers.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassIncludesInheritedMembers.ts(9,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassIncludesInheritedMembers.ts(10,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassIncludesInheritedMembers.ts (4 errors) ====
-    class Base {
-        a: string;
-        b() { }
-        get c() { return ''; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        set c(v) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        static r: string;
-        static s() { }
-        static get t() { return ''; }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static set t(v) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        constructor(x) { }
-    }
-    
-    class Derived extends Base {
-    }
-    
-    var d: Derived = new Derived(1);
-    var r1 = d.a;
-    var r2 = d.b();
-    var r3 = d.c;
-    d.c = '';
-    var r4 = Derived.r;
-    var r5 = Derived.s();
-    var r6 = Derived.t;
-    Derived.t = '';
-    
-    class Base2 {
-        [x: string]: Object;
-        [x: number]: Date;
-    }
-    
-    class Derived2 extends Base2 {
-    }
-    
-    var d2: Derived2;
-    var r7 = d2[''];
-    var r8 = d2[1];
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/derivedClassIncludesInheritedMembers.symbols b/tests/baselines/reference/derivedClassIncludesInheritedMembers.symbols
new file mode 100644
index 0000000000000..6cbc7a28707dd
--- /dev/null
+++ b/tests/baselines/reference/derivedClassIncludesInheritedMembers.symbols
@@ -0,0 +1,120 @@
+=== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassIncludesInheritedMembers.ts ===
+class Base {
+>Base : Symbol(Base, Decl(derivedClassIncludesInheritedMembers.ts, 0, 0))
+
+    a: string;
+>a : Symbol(Base.a, Decl(derivedClassIncludesInheritedMembers.ts, 0, 12))
+
+    b() { }
+>b : Symbol(Base.b, Decl(derivedClassIncludesInheritedMembers.ts, 1, 14))
+
+    get c() { return ''; }
+>c : Symbol(Base.c, Decl(derivedClassIncludesInheritedMembers.ts, 2, 11), Decl(derivedClassIncludesInheritedMembers.ts, 3, 26))
+
+    set c(v) { }
+>c : Symbol(Base.c, Decl(derivedClassIncludesInheritedMembers.ts, 2, 11), Decl(derivedClassIncludesInheritedMembers.ts, 3, 26))
+>v : Symbol(v, Decl(derivedClassIncludesInheritedMembers.ts, 4, 10))
+
+    static r: string;
+>r : Symbol(Base.r, Decl(derivedClassIncludesInheritedMembers.ts, 4, 16))
+
+    static s() { }
+>s : Symbol(Base.s, Decl(derivedClassIncludesInheritedMembers.ts, 6, 21))
+
+    static get t() { return ''; }
+>t : Symbol(Base.t, Decl(derivedClassIncludesInheritedMembers.ts, 7, 18), Decl(derivedClassIncludesInheritedMembers.ts, 8, 33))
+
+    static set t(v) { }
+>t : Symbol(Base.t, Decl(derivedClassIncludesInheritedMembers.ts, 7, 18), Decl(derivedClassIncludesInheritedMembers.ts, 8, 33))
+>v : Symbol(v, Decl(derivedClassIncludesInheritedMembers.ts, 9, 17))
+
+    constructor(x) { }
+>x : Symbol(x, Decl(derivedClassIncludesInheritedMembers.ts, 11, 16))
+}
+
+class Derived extends Base {
+>Derived : Symbol(Derived, Decl(derivedClassIncludesInheritedMembers.ts, 12, 1))
+>Base : Symbol(Base, Decl(derivedClassIncludesInheritedMembers.ts, 0, 0))
+}
+
+var d: Derived = new Derived(1);
+>d : Symbol(d, Decl(derivedClassIncludesInheritedMembers.ts, 17, 3))
+>Derived : Symbol(Derived, Decl(derivedClassIncludesInheritedMembers.ts, 12, 1))
+>Derived : Symbol(Derived, Decl(derivedClassIncludesInheritedMembers.ts, 12, 1))
+
+var r1 = d.a;
+>r1 : Symbol(r1, Decl(derivedClassIncludesInheritedMembers.ts, 18, 3))
+>d.a : Symbol(Base.a, Decl(derivedClassIncludesInheritedMembers.ts, 0, 12))
+>d : Symbol(d, Decl(derivedClassIncludesInheritedMembers.ts, 17, 3))
+>a : Symbol(Base.a, Decl(derivedClassIncludesInheritedMembers.ts, 0, 12))
+
+var r2 = d.b();
+>r2 : Symbol(r2, Decl(derivedClassIncludesInheritedMembers.ts, 19, 3))
+>d.b : Symbol(Base.b, Decl(derivedClassIncludesInheritedMembers.ts, 1, 14))
+>d : Symbol(d, Decl(derivedClassIncludesInheritedMembers.ts, 17, 3))
+>b : Symbol(Base.b, Decl(derivedClassIncludesInheritedMembers.ts, 1, 14))
+
+var r3 = d.c;
+>r3 : Symbol(r3, Decl(derivedClassIncludesInheritedMembers.ts, 20, 3))
+>d.c : Symbol(Base.c, Decl(derivedClassIncludesInheritedMembers.ts, 2, 11), Decl(derivedClassIncludesInheritedMembers.ts, 3, 26))
+>d : Symbol(d, Decl(derivedClassIncludesInheritedMembers.ts, 17, 3))
+>c : Symbol(Base.c, Decl(derivedClassIncludesInheritedMembers.ts, 2, 11), Decl(derivedClassIncludesInheritedMembers.ts, 3, 26))
+
+d.c = '';
+>d.c : Symbol(Base.c, Decl(derivedClassIncludesInheritedMembers.ts, 2, 11), Decl(derivedClassIncludesInheritedMembers.ts, 3, 26))
+>d : Symbol(d, Decl(derivedClassIncludesInheritedMembers.ts, 17, 3))
+>c : Symbol(Base.c, Decl(derivedClassIncludesInheritedMembers.ts, 2, 11), Decl(derivedClassIncludesInheritedMembers.ts, 3, 26))
+
+var r4 = Derived.r;
+>r4 : Symbol(r4, Decl(derivedClassIncludesInheritedMembers.ts, 22, 3))
+>Derived.r : Symbol(Base.r, Decl(derivedClassIncludesInheritedMembers.ts, 4, 16))
+>Derived : Symbol(Derived, Decl(derivedClassIncludesInheritedMembers.ts, 12, 1))
+>r : Symbol(Base.r, Decl(derivedClassIncludesInheritedMembers.ts, 4, 16))
+
+var r5 = Derived.s();
+>r5 : Symbol(r5, Decl(derivedClassIncludesInheritedMembers.ts, 23, 3))
+>Derived.s : Symbol(Base.s, Decl(derivedClassIncludesInheritedMembers.ts, 6, 21))
+>Derived : Symbol(Derived, Decl(derivedClassIncludesInheritedMembers.ts, 12, 1))
+>s : Symbol(Base.s, Decl(derivedClassIncludesInheritedMembers.ts, 6, 21))
+
+var r6 = Derived.t;
+>r6 : Symbol(r6, Decl(derivedClassIncludesInheritedMembers.ts, 24, 3))
+>Derived.t : Symbol(Base.t, Decl(derivedClassIncludesInheritedMembers.ts, 7, 18), Decl(derivedClassIncludesInheritedMembers.ts, 8, 33))
+>Derived : Symbol(Derived, Decl(derivedClassIncludesInheritedMembers.ts, 12, 1))
+>t : Symbol(Base.t, Decl(derivedClassIncludesInheritedMembers.ts, 7, 18), Decl(derivedClassIncludesInheritedMembers.ts, 8, 33))
+
+Derived.t = '';
+>Derived.t : Symbol(Base.t, Decl(derivedClassIncludesInheritedMembers.ts, 7, 18), Decl(derivedClassIncludesInheritedMembers.ts, 8, 33))
+>Derived : Symbol(Derived, Decl(derivedClassIncludesInheritedMembers.ts, 12, 1))
+>t : Symbol(Base.t, Decl(derivedClassIncludesInheritedMembers.ts, 7, 18), Decl(derivedClassIncludesInheritedMembers.ts, 8, 33))
+
+class Base2 {
+>Base2 : Symbol(Base2, Decl(derivedClassIncludesInheritedMembers.ts, 25, 15))
+
+    [x: string]: Object;
+>x : Symbol(x, Decl(derivedClassIncludesInheritedMembers.ts, 28, 5))
+>Object : Symbol(Object, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+    [x: number]: Date;
+>x : Symbol(x, Decl(derivedClassIncludesInheritedMembers.ts, 29, 5))
+>Date : Symbol(Date, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+}
+
+class Derived2 extends Base2 {
+>Derived2 : Symbol(Derived2, Decl(derivedClassIncludesInheritedMembers.ts, 30, 1))
+>Base2 : Symbol(Base2, Decl(derivedClassIncludesInheritedMembers.ts, 25, 15))
+}
+
+var d2: Derived2;
+>d2 : Symbol(d2, Decl(derivedClassIncludesInheritedMembers.ts, 35, 3))
+>Derived2 : Symbol(Derived2, Decl(derivedClassIncludesInheritedMembers.ts, 30, 1))
+
+var r7 = d2[''];
+>r7 : Symbol(r7, Decl(derivedClassIncludesInheritedMembers.ts, 36, 3))
+>d2 : Symbol(d2, Decl(derivedClassIncludesInheritedMembers.ts, 35, 3))
+
+var r8 = d2[1];
+>r8 : Symbol(r8, Decl(derivedClassIncludesInheritedMembers.ts, 37, 3))
+>d2 : Symbol(d2, Decl(derivedClassIncludesInheritedMembers.ts, 35, 3))
+
+
diff --git a/tests/baselines/reference/derivedClassIncludesInheritedMembers.types b/tests/baselines/reference/derivedClassIncludesInheritedMembers.types
new file mode 100644
index 0000000000000..71ec00a753e3d
--- /dev/null
+++ b/tests/baselines/reference/derivedClassIncludesInheritedMembers.types
@@ -0,0 +1,134 @@
+=== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassIncludesInheritedMembers.ts ===
+class Base {
+>Base : Base
+
+    a: string;
+>a : string
+
+    b() { }
+>b : () => void
+
+    get c() { return ''; }
+>c : string
+>'' : ""
+
+    set c(v) { }
+>c : string
+>v : string
+
+    static r: string;
+>r : string
+
+    static s() { }
+>s : () => void
+
+    static get t() { return ''; }
+>t : string
+>'' : ""
+
+    static set t(v) { }
+>t : string
+>v : string
+
+    constructor(x) { }
+>x : any
+}
+
+class Derived extends Base {
+>Derived : Derived
+>Base : Base
+}
+
+var d: Derived = new Derived(1);
+>d : Derived
+>Derived : Derived
+>new Derived(1) : Derived
+>Derived : typeof Derived
+>1 : 1
+
+var r1 = d.a;
+>r1 : string
+>d.a : string
+>d : Derived
+>a : string
+
+var r2 = d.b();
+>r2 : void
+>d.b() : void
+>d.b : () => void
+>d : Derived
+>b : () => void
+
+var r3 = d.c;
+>r3 : string
+>d.c : string
+>d : Derived
+>c : string
+
+d.c = '';
+>d.c = '' : ""
+>d.c : string
+>d : Derived
+>c : string
+>'' : ""
+
+var r4 = Derived.r;
+>r4 : string
+>Derived.r : string
+>Derived : typeof Derived
+>r : string
+
+var r5 = Derived.s();
+>r5 : void
+>Derived.s() : void
+>Derived.s : () => void
+>Derived : typeof Derived
+>s : () => void
+
+var r6 = Derived.t;
+>r6 : string
+>Derived.t : string
+>Derived : typeof Derived
+>t : string
+
+Derived.t = '';
+>Derived.t = '' : ""
+>Derived.t : string
+>Derived : typeof Derived
+>t : string
+>'' : ""
+
+class Base2 {
+>Base2 : Base2
+
+    [x: string]: Object;
+>x : string
+>Object : Object
+
+    [x: number]: Date;
+>x : number
+>Date : Date
+}
+
+class Derived2 extends Base2 {
+>Derived2 : Derived2
+>Base2 : Base2
+}
+
+var d2: Derived2;
+>d2 : Derived2
+>Derived2 : Derived2
+
+var r7 = d2[''];
+>r7 : Object
+>d2[''] : Object
+>d2 : Derived2
+>'' : ""
+
+var r8 = d2[1];
+>r8 : Date
+>d2[1] : Date
+>d2 : Derived2
+>1 : 1
+
+
diff --git a/tests/baselines/reference/derivedClassOverridesPublicMembers.errors.txt b/tests/baselines/reference/derivedClassOverridesPublicMembers.errors.txt
deleted file mode 100644
index 9292ff64411d5..0000000000000
--- a/tests/baselines/reference/derivedClassOverridesPublicMembers.errors.txt
+++ /dev/null
@@ -1,89 +0,0 @@
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(7,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(8,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(13,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(14,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(23,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(24,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(29,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts(30,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts (8 errors) ====
-    var x: { foo: string; }
-    var y: { foo: string; bar: string; }
-    
-    class Base {
-        a: typeof x;
-        b(a: typeof x) { }
-        get c() { return x; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        set c(v: typeof x) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        d: (a: typeof x) => void;
-    
-        static r: typeof x;
-        static s(a: typeof x) { }
-        static get t() { return x; }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static set t(v: typeof x) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static u: (a: typeof x) => void;
-    
-        constructor(a: typeof x) { }
-    }
-    
-    class Derived extends Base {
-        a: typeof y;
-        b(a: typeof y) { }
-        get c() { return y; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        set c(v: typeof y) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        d: (a: typeof y) => void;
-    
-        static r: typeof y;
-        static s(a: typeof y) { }
-        static get t() { return y; }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static set t(a: typeof y) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static u: (a: typeof y) => void;
-    
-        constructor(a: typeof y) { super(x) }
-    }
-    
-    var d: Derived = new Derived(y);
-    var r1 = d.a;
-    var r2 = d.b(y);
-    var r3 = d.c;
-    var r3a = d.d;
-    d.c = y;
-    var r4 = Derived.r;
-    var r5 = Derived.s(y);
-    var r6 = Derived.t;
-    var r6a = Derived.u;
-    Derived.t = y;
-    
-    class Base2 {
-        [i: string]: Object;
-        [i: number]: typeof x;
-    }
-    
-    class Derived2 extends Base2 {
-        [i: string]: typeof x;
-        [i: number]: typeof y;
-    }
-    
-    var d2: Derived2;
-    var r7 = d2[''];
-    var r8 = d2[1];
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/derivedClassOverridesPublicMembers.symbols b/tests/baselines/reference/derivedClassOverridesPublicMembers.symbols
new file mode 100644
index 0000000000000..45c0faecf409c
--- /dev/null
+++ b/tests/baselines/reference/derivedClassOverridesPublicMembers.symbols
@@ -0,0 +1,227 @@
+=== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts ===
+var x: { foo: string; }
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+>foo : Symbol(foo, Decl(derivedClassOverridesPublicMembers.ts, 0, 8))
+
+var y: { foo: string; bar: string; }
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+>foo : Symbol(foo, Decl(derivedClassOverridesPublicMembers.ts, 1, 8))
+>bar : Symbol(bar, Decl(derivedClassOverridesPublicMembers.ts, 1, 21))
+
+class Base {
+>Base : Symbol(Base, Decl(derivedClassOverridesPublicMembers.ts, 1, 36))
+
+    a: typeof x;
+>a : Symbol(Base.a, Decl(derivedClassOverridesPublicMembers.ts, 3, 12))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    b(a: typeof x) { }
+>b : Symbol(Base.b, Decl(derivedClassOverridesPublicMembers.ts, 4, 16))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 5, 6))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    get c() { return x; }
+>c : Symbol(Base.c, Decl(derivedClassOverridesPublicMembers.ts, 5, 22), Decl(derivedClassOverridesPublicMembers.ts, 6, 25))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    set c(v: typeof x) { }
+>c : Symbol(Base.c, Decl(derivedClassOverridesPublicMembers.ts, 5, 22), Decl(derivedClassOverridesPublicMembers.ts, 6, 25))
+>v : Symbol(v, Decl(derivedClassOverridesPublicMembers.ts, 7, 10))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    d: (a: typeof x) => void;
+>d : Symbol(Base.d, Decl(derivedClassOverridesPublicMembers.ts, 7, 26))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 8, 8))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    static r: typeof x;
+>r : Symbol(Base.r, Decl(derivedClassOverridesPublicMembers.ts, 8, 29))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    static s(a: typeof x) { }
+>s : Symbol(Base.s, Decl(derivedClassOverridesPublicMembers.ts, 10, 23))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 11, 13))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    static get t() { return x; }
+>t : Symbol(Base.t, Decl(derivedClassOverridesPublicMembers.ts, 11, 29), Decl(derivedClassOverridesPublicMembers.ts, 12, 32))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    static set t(v: typeof x) { }
+>t : Symbol(Base.t, Decl(derivedClassOverridesPublicMembers.ts, 11, 29), Decl(derivedClassOverridesPublicMembers.ts, 12, 32))
+>v : Symbol(v, Decl(derivedClassOverridesPublicMembers.ts, 13, 17))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    static u: (a: typeof x) => void;
+>u : Symbol(Base.u, Decl(derivedClassOverridesPublicMembers.ts, 13, 33))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 14, 15))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    constructor(a: typeof x) { }
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 16, 16))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+}
+
+class Derived extends Base {
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>Base : Symbol(Base, Decl(derivedClassOverridesPublicMembers.ts, 1, 36))
+
+    a: typeof y;
+>a : Symbol(Derived.a, Decl(derivedClassOverridesPublicMembers.ts, 19, 28))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    b(a: typeof y) { }
+>b : Symbol(Derived.b, Decl(derivedClassOverridesPublicMembers.ts, 20, 16))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 21, 6))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    get c() { return y; }
+>c : Symbol(Derived.c, Decl(derivedClassOverridesPublicMembers.ts, 21, 22), Decl(derivedClassOverridesPublicMembers.ts, 22, 25))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    set c(v: typeof y) { }
+>c : Symbol(Derived.c, Decl(derivedClassOverridesPublicMembers.ts, 21, 22), Decl(derivedClassOverridesPublicMembers.ts, 22, 25))
+>v : Symbol(v, Decl(derivedClassOverridesPublicMembers.ts, 23, 10))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    d: (a: typeof y) => void;
+>d : Symbol(Derived.d, Decl(derivedClassOverridesPublicMembers.ts, 23, 26))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 24, 8))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    static r: typeof y;
+>r : Symbol(Derived.r, Decl(derivedClassOverridesPublicMembers.ts, 24, 29))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    static s(a: typeof y) { }
+>s : Symbol(Derived.s, Decl(derivedClassOverridesPublicMembers.ts, 26, 23))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 27, 13))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    static get t() { return y; }
+>t : Symbol(Derived.t, Decl(derivedClassOverridesPublicMembers.ts, 27, 29), Decl(derivedClassOverridesPublicMembers.ts, 28, 32))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    static set t(a: typeof y) { }
+>t : Symbol(Derived.t, Decl(derivedClassOverridesPublicMembers.ts, 27, 29), Decl(derivedClassOverridesPublicMembers.ts, 28, 32))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 29, 17))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    static u: (a: typeof y) => void;
+>u : Symbol(Derived.u, Decl(derivedClassOverridesPublicMembers.ts, 29, 33))
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 30, 15))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+    constructor(a: typeof y) { super(x) }
+>a : Symbol(a, Decl(derivedClassOverridesPublicMembers.ts, 32, 16))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+>super : Symbol(Base, Decl(derivedClassOverridesPublicMembers.ts, 1, 36))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+}
+
+var d: Derived = new Derived(y);
+>d : Symbol(d, Decl(derivedClassOverridesPublicMembers.ts, 35, 3))
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+var r1 = d.a;
+>r1 : Symbol(r1, Decl(derivedClassOverridesPublicMembers.ts, 36, 3))
+>d.a : Symbol(Derived.a, Decl(derivedClassOverridesPublicMembers.ts, 19, 28))
+>d : Symbol(d, Decl(derivedClassOverridesPublicMembers.ts, 35, 3))
+>a : Symbol(Derived.a, Decl(derivedClassOverridesPublicMembers.ts, 19, 28))
+
+var r2 = d.b(y);
+>r2 : Symbol(r2, Decl(derivedClassOverridesPublicMembers.ts, 37, 3))
+>d.b : Symbol(Derived.b, Decl(derivedClassOverridesPublicMembers.ts, 20, 16))
+>d : Symbol(d, Decl(derivedClassOverridesPublicMembers.ts, 35, 3))
+>b : Symbol(Derived.b, Decl(derivedClassOverridesPublicMembers.ts, 20, 16))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+var r3 = d.c;
+>r3 : Symbol(r3, Decl(derivedClassOverridesPublicMembers.ts, 38, 3))
+>d.c : Symbol(Derived.c, Decl(derivedClassOverridesPublicMembers.ts, 21, 22), Decl(derivedClassOverridesPublicMembers.ts, 22, 25))
+>d : Symbol(d, Decl(derivedClassOverridesPublicMembers.ts, 35, 3))
+>c : Symbol(Derived.c, Decl(derivedClassOverridesPublicMembers.ts, 21, 22), Decl(derivedClassOverridesPublicMembers.ts, 22, 25))
+
+var r3a = d.d;
+>r3a : Symbol(r3a, Decl(derivedClassOverridesPublicMembers.ts, 39, 3))
+>d.d : Symbol(Derived.d, Decl(derivedClassOverridesPublicMembers.ts, 23, 26))
+>d : Symbol(d, Decl(derivedClassOverridesPublicMembers.ts, 35, 3))
+>d : Symbol(Derived.d, Decl(derivedClassOverridesPublicMembers.ts, 23, 26))
+
+d.c = y;
+>d.c : Symbol(Derived.c, Decl(derivedClassOverridesPublicMembers.ts, 21, 22), Decl(derivedClassOverridesPublicMembers.ts, 22, 25))
+>d : Symbol(d, Decl(derivedClassOverridesPublicMembers.ts, 35, 3))
+>c : Symbol(Derived.c, Decl(derivedClassOverridesPublicMembers.ts, 21, 22), Decl(derivedClassOverridesPublicMembers.ts, 22, 25))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+var r4 = Derived.r;
+>r4 : Symbol(r4, Decl(derivedClassOverridesPublicMembers.ts, 41, 3))
+>Derived.r : Symbol(Derived.r, Decl(derivedClassOverridesPublicMembers.ts, 24, 29))
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>r : Symbol(Derived.r, Decl(derivedClassOverridesPublicMembers.ts, 24, 29))
+
+var r5 = Derived.s(y);
+>r5 : Symbol(r5, Decl(derivedClassOverridesPublicMembers.ts, 42, 3))
+>Derived.s : Symbol(Derived.s, Decl(derivedClassOverridesPublicMembers.ts, 26, 23))
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>s : Symbol(Derived.s, Decl(derivedClassOverridesPublicMembers.ts, 26, 23))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+var r6 = Derived.t;
+>r6 : Symbol(r6, Decl(derivedClassOverridesPublicMembers.ts, 43, 3))
+>Derived.t : Symbol(Derived.t, Decl(derivedClassOverridesPublicMembers.ts, 27, 29), Decl(derivedClassOverridesPublicMembers.ts, 28, 32))
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>t : Symbol(Derived.t, Decl(derivedClassOverridesPublicMembers.ts, 27, 29), Decl(derivedClassOverridesPublicMembers.ts, 28, 32))
+
+var r6a = Derived.u;
+>r6a : Symbol(r6a, Decl(derivedClassOverridesPublicMembers.ts, 44, 3))
+>Derived.u : Symbol(Derived.u, Decl(derivedClassOverridesPublicMembers.ts, 29, 33))
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>u : Symbol(Derived.u, Decl(derivedClassOverridesPublicMembers.ts, 29, 33))
+
+Derived.t = y;
+>Derived.t : Symbol(Derived.t, Decl(derivedClassOverridesPublicMembers.ts, 27, 29), Decl(derivedClassOverridesPublicMembers.ts, 28, 32))
+>Derived : Symbol(Derived, Decl(derivedClassOverridesPublicMembers.ts, 17, 1))
+>t : Symbol(Derived.t, Decl(derivedClassOverridesPublicMembers.ts, 27, 29), Decl(derivedClassOverridesPublicMembers.ts, 28, 32))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+
+class Base2 {
+>Base2 : Symbol(Base2, Decl(derivedClassOverridesPublicMembers.ts, 45, 14))
+
+    [i: string]: Object;
+>i : Symbol(i, Decl(derivedClassOverridesPublicMembers.ts, 48, 5))
+>Object : Symbol(Object, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+    [i: number]: typeof x;
+>i : Symbol(i, Decl(derivedClassOverridesPublicMembers.ts, 49, 5))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+}
+
+class Derived2 extends Base2 {
+>Derived2 : Symbol(Derived2, Decl(derivedClassOverridesPublicMembers.ts, 50, 1))
+>Base2 : Symbol(Base2, Decl(derivedClassOverridesPublicMembers.ts, 45, 14))
+
+    [i: string]: typeof x;
+>i : Symbol(i, Decl(derivedClassOverridesPublicMembers.ts, 53, 5))
+>x : Symbol(x, Decl(derivedClassOverridesPublicMembers.ts, 0, 3))
+
+    [i: number]: typeof y;
+>i : Symbol(i, Decl(derivedClassOverridesPublicMembers.ts, 54, 5))
+>y : Symbol(y, Decl(derivedClassOverridesPublicMembers.ts, 1, 3))
+}
+
+var d2: Derived2;
+>d2 : Symbol(d2, Decl(derivedClassOverridesPublicMembers.ts, 57, 3))
+>Derived2 : Symbol(Derived2, Decl(derivedClassOverridesPublicMembers.ts, 50, 1))
+
+var r7 = d2[''];
+>r7 : Symbol(r7, Decl(derivedClassOverridesPublicMembers.ts, 58, 3))
+>d2 : Symbol(d2, Decl(derivedClassOverridesPublicMembers.ts, 57, 3))
+
+var r8 = d2[1];
+>r8 : Symbol(r8, Decl(derivedClassOverridesPublicMembers.ts, 59, 3))
+>d2 : Symbol(d2, Decl(derivedClassOverridesPublicMembers.ts, 57, 3))
+
+
diff --git a/tests/baselines/reference/derivedClassOverridesPublicMembers.types b/tests/baselines/reference/derivedClassOverridesPublicMembers.types
new file mode 100644
index 0000000000000..cb6727a72c992
--- /dev/null
+++ b/tests/baselines/reference/derivedClassOverridesPublicMembers.types
@@ -0,0 +1,237 @@
+=== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassOverridesPublicMembers.ts ===
+var x: { foo: string; }
+>x : { foo: string; }
+>foo : string
+
+var y: { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+>foo : string
+>bar : string
+
+class Base {
+>Base : Base
+
+    a: typeof x;
+>a : { foo: string; }
+>x : { foo: string; }
+
+    b(a: typeof x) { }
+>b : (a: { foo: string; }) => void
+>a : { foo: string; }
+>x : { foo: string; }
+
+    get c() { return x; }
+>c : { foo: string; }
+>x : { foo: string; }
+
+    set c(v: typeof x) { }
+>c : { foo: string; }
+>v : { foo: string; }
+>x : { foo: string; }
+
+    d: (a: typeof x) => void;
+>d : (a: { foo: string; }) => void
+>a : { foo: string; }
+>x : { foo: string; }
+
+    static r: typeof x;
+>r : { foo: string; }
+>x : { foo: string; }
+
+    static s(a: typeof x) { }
+>s : (a: { foo: string; }) => void
+>a : { foo: string; }
+>x : { foo: string; }
+
+    static get t() { return x; }
+>t : { foo: string; }
+>x : { foo: string; }
+
+    static set t(v: typeof x) { }
+>t : { foo: string; }
+>v : { foo: string; }
+>x : { foo: string; }
+
+    static u: (a: typeof x) => void;
+>u : (a: { foo: string; }) => void
+>a : { foo: string; }
+>x : { foo: string; }
+
+    constructor(a: typeof x) { }
+>a : { foo: string; }
+>x : { foo: string; }
+}
+
+class Derived extends Base {
+>Derived : Derived
+>Base : Base
+
+    a: typeof y;
+>a : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    b(a: typeof y) { }
+>b : (a: { foo: string; bar: string; }) => void
+>a : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    get c() { return y; }
+>c : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    set c(v: typeof y) { }
+>c : { foo: string; bar: string; }
+>v : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    d: (a: typeof y) => void;
+>d : (a: { foo: string; bar: string; }) => void
+>a : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    static r: typeof y;
+>r : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    static s(a: typeof y) { }
+>s : (a: { foo: string; bar: string; }) => void
+>a : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    static get t() { return y; }
+>t : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    static set t(a: typeof y) { }
+>t : { foo: string; bar: string; }
+>a : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    static u: (a: typeof y) => void;
+>u : (a: { foo: string; bar: string; }) => void
+>a : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+    constructor(a: typeof y) { super(x) }
+>a : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+>super(x) : void
+>super : typeof Base
+>x : { foo: string; }
+}
+
+var d: Derived = new Derived(y);
+>d : Derived
+>Derived : Derived
+>new Derived(y) : Derived
+>Derived : typeof Derived
+>y : { foo: string; bar: string; }
+
+var r1 = d.a;
+>r1 : { foo: string; bar: string; }
+>d.a : { foo: string; bar: string; }
+>d : Derived
+>a : { foo: string; bar: string; }
+
+var r2 = d.b(y);
+>r2 : void
+>d.b(y) : void
+>d.b : (a: { foo: string; bar: string; }) => void
+>d : Derived
+>b : (a: { foo: string; bar: string; }) => void
+>y : { foo: string; bar: string; }
+
+var r3 = d.c;
+>r3 : { foo: string; bar: string; }
+>d.c : { foo: string; bar: string; }
+>d : Derived
+>c : { foo: string; bar: string; }
+
+var r3a = d.d;
+>r3a : (a: { foo: string; bar: string; }) => void
+>d.d : (a: { foo: string; bar: string; }) => void
+>d : Derived
+>d : (a: { foo: string; bar: string; }) => void
+
+d.c = y;
+>d.c = y : { foo: string; bar: string; }
+>d.c : { foo: string; bar: string; }
+>d : Derived
+>c : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+var r4 = Derived.r;
+>r4 : { foo: string; bar: string; }
+>Derived.r : { foo: string; bar: string; }
+>Derived : typeof Derived
+>r : { foo: string; bar: string; }
+
+var r5 = Derived.s(y);
+>r5 : void
+>Derived.s(y) : void
+>Derived.s : (a: { foo: string; bar: string; }) => void
+>Derived : typeof Derived
+>s : (a: { foo: string; bar: string; }) => void
+>y : { foo: string; bar: string; }
+
+var r6 = Derived.t;
+>r6 : { foo: string; bar: string; }
+>Derived.t : { foo: string; bar: string; }
+>Derived : typeof Derived
+>t : { foo: string; bar: string; }
+
+var r6a = Derived.u;
+>r6a : (a: { foo: string; bar: string; }) => void
+>Derived.u : (a: { foo: string; bar: string; }) => void
+>Derived : typeof Derived
+>u : (a: { foo: string; bar: string; }) => void
+
+Derived.t = y;
+>Derived.t = y : { foo: string; bar: string; }
+>Derived.t : { foo: string; bar: string; }
+>Derived : typeof Derived
+>t : { foo: string; bar: string; }
+>y : { foo: string; bar: string; }
+
+class Base2 {
+>Base2 : Base2
+
+    [i: string]: Object;
+>i : string
+>Object : Object
+
+    [i: number]: typeof x;
+>i : number
+>x : { foo: string; }
+}
+
+class Derived2 extends Base2 {
+>Derived2 : Derived2
+>Base2 : Base2
+
+    [i: string]: typeof x;
+>i : string
+>x : { foo: string; }
+
+    [i: number]: typeof y;
+>i : number
+>y : { foo: string; bar: string; }
+}
+
+var d2: Derived2;
+>d2 : Derived2
+>Derived2 : Derived2
+
+var r7 = d2[''];
+>r7 : { foo: string; }
+>d2[''] : { foo: string; }
+>d2 : Derived2
+>'' : ""
+
+var r8 = d2[1];
+>r8 : { foo: string; bar: string; }
+>d2[1] : { foo: string; bar: string; }
+>d2 : Derived2
+>1 : 1
+
+
diff --git a/tests/baselines/reference/derivedClassWithAny.errors.txt b/tests/baselines/reference/derivedClassWithAny.errors.txt
index aa91979706b51..0c26846ff5267 100644
--- a/tests/baselines/reference/derivedClassWithAny.errors.txt
+++ b/tests/baselines/reference/derivedClassWithAny.errors.txt
@@ -1,28 +1,18 @@
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts(9,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts(19,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts(27,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts(38,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts(44,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts(57,1): error TS2322: Type 'E' is not assignable to type 'C'.
   Types of property 'x' are incompatible.
     Type 'string' is not assignable to type 'number'.
 
 
-==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts (7 errors) ====
+==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithAny.ts (1 errors) ====
     class C {
         x: number;
         get X(): number { return 1; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         foo(): number {
             return 1;
         }
     
         static y: number;
         static get Y(): number {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 1;
         }
         static bar(): number {
@@ -33,8 +23,6 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
     class D extends C {
         x: any;
         get X(): any {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return null;
         }
         foo(): any {
@@ -43,8 +31,6 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
     
         static y: any;
         static get Y(): any {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return null;
         }
         static bar(): any {
@@ -56,16 +42,12 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
     class E extends D {
         x: string;
         get X(): string{ return ''; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         foo(): string {
             return '';
         }
     
         static y: string;
         static get Y(): string {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return '';
         }
         static bar(): string {
diff --git a/tests/baselines/reference/derivedClassWithPrivateInstanceShadowingPublicInstance.errors.txt b/tests/baselines/reference/derivedClassWithPrivateInstanceShadowingPublicInstance.errors.txt
index 6aeb5a7ec23a7..944ce487c4ce1 100644
--- a/tests/baselines/reference/derivedClassWithPrivateInstanceShadowingPublicInstance.errors.txt
+++ b/tests/baselines/reference/derivedClassWithPrivateInstanceShadowingPublicInstance.errors.txt
@@ -1,9 +1,5 @@
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(7,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(8,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(12,7): error TS2415: Class 'Derived' incorrectly extends base class 'Base'.
   Property 'x' is private in type 'Derived' but not in type 'Base'.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(18,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(19,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(22,14): error TS2339: Property 'x' does not exist on type 'typeof Base'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(23,18): error TS2339: Property 'x' does not exist on type 'typeof Derived'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(25,15): error TS2339: Property 'fn' does not exist on type 'typeof Base'.
@@ -14,7 +10,7 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts(32,9): error TS2339: Property 'a' does not exist on type 'typeof Derived'.
 
 
-==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts (13 errors) ====
+==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateInstanceShadowingPublicInstance.ts (9 errors) ====
     class Base {
         public x: string;
         public fn(): string {
@@ -22,11 +18,7 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
         }
     
         public get a() { return 1; }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         public set a(v) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
     
     // error, not a subtype
@@ -40,11 +32,7 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
         }
     
         private get a() { return 1; }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         private set a(v) { }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
     
     var r = Base.x; // ok
diff --git a/tests/baselines/reference/derivedClassWithPrivateStaticShadowingPublicStatic.errors.txt b/tests/baselines/reference/derivedClassWithPrivateStaticShadowingPublicStatic.errors.txt
index 88ec9eb44a855..9fcb8313f3923 100644
--- a/tests/baselines/reference/derivedClassWithPrivateStaticShadowingPublicStatic.errors.txt
+++ b/tests/baselines/reference/derivedClassWithPrivateStaticShadowingPublicStatic.errors.txt
@@ -1,16 +1,12 @@
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(7,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(8,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(13,7): error TS2417: Class static side 'typeof Derived' incorrectly extends base class static side 'typeof Base'.
   Property 'x' is private in type 'typeof Derived' but not in type 'typeof Base'.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(19,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(20,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(24,18): error TS2341: Property 'x' is private and only accessible within class 'Derived'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(27,18): error TS2341: Property 'fn' is private and only accessible within class 'Derived'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(32,18): error TS2341: Property 'a' is private and only accessible within class 'Derived'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts(33,9): error TS2341: Property 'a' is private and only accessible within class 'Derived'.
 
 
-==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts (9 errors) ====
+==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWithPrivateStaticShadowingPublicStatic.ts (5 errors) ====
     class Base {
         public static x: string;
         public static fn(): string {
@@ -18,11 +14,7 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
         }
     
         public static get a() { return 1; }
-                          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         public static set a(v) { }
-                          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
     
     // BUG 847404
@@ -37,11 +29,7 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedClassWit
         }
     
         private static get a() { return 1; }
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         private static set a(v) { }
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
     
     var r = Base.x; // ok
diff --git a/tests/baselines/reference/derivedGenericClassWithAny.errors.txt b/tests/baselines/reference/derivedGenericClassWithAny.errors.txt
index 359fab212e909..b68261f2df86b 100644
--- a/tests/baselines/reference/derivedGenericClassWithAny.errors.txt
+++ b/tests/baselines/reference/derivedGenericClassWithAny.errors.txt
@@ -1,7 +1,3 @@
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts(11,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts(19,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts(30,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts(30,18): error TS2322: Type '""' is not assignable to type 'T'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts(32,9): error TS2322: Type '""' is not assignable to type 'T'.
 tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts(41,1): error TS2322: Type 'E<string>' is not assignable to type 'C<number>'.
@@ -9,12 +5,10 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericC
     Type 'string' is not assignable to type 'number'.
 
 
-==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts (7 errors) ====
+==== tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericClassWithAny.ts (3 errors) ====
     class C<T extends number> {
         x: T;
         get X(): T { return null; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         foo(): T {
             return null;
         }
@@ -23,8 +17,6 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericC
     class D extends C<number> {
         x: any;
         get X(): any {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return null;
         }
         foo(): any {
@@ -33,8 +25,6 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericC
     
         static y: any;
         static get Y(): any {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return null;
         }
         static bar(): any {
@@ -46,8 +36,6 @@ tests/cases/conformance/classes/members/inheritanceAndOverriding/derivedGenericC
     class E<T extends string> extends D {
         x: T;
         get X(): T { return ''; } // error
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                      ~~~~~~~~~~
 !!! error TS2322: Type '""' is not assignable to type 'T'.
         foo(): T {
diff --git a/tests/baselines/reference/destructuringParameterDeclaration6.js b/tests/baselines/reference/destructuringParameterDeclaration6.js
index a8c7f65211f75..44387820368de 100644
--- a/tests/baselines/reference/destructuringParameterDeclaration6.js
+++ b/tests/baselines/reference/destructuringParameterDeclaration6.js
@@ -27,7 +27,7 @@ b2({ while: 1 });
 "use strict";
 // Error
 function a(_a) {
-    var  = _a["while"];
+    var  = _a.while;
 }
 function a1(_a) {
     var public = _a.public;
@@ -56,13 +56,13 @@ function a7() {
         a[_i] = arguments[_i];
     }
 }
-a({ "while": 1 });
+a({ while: 1 });
 // No Error
 function b1(_a) {
     var x = _a.public;
 }
 function b2(_a) {
-    var y = _a["while"];
+    var y = _a.while;
 }
 b1({ public: 1 });
-b2({ "while": 1 });
+b2({ while: 1 });
diff --git a/tests/baselines/reference/duplicateClassElements.errors.txt b/tests/baselines/reference/duplicateClassElements.errors.txt
index 7579190db7194..16873c5581211 100644
--- a/tests/baselines/reference/duplicateClassElements.errors.txt
+++ b/tests/baselines/reference/duplicateClassElements.errors.txt
@@ -2,29 +2,19 @@ tests/cases/compiler/duplicateClassElements.ts(3,12): error TS2300: Duplicate id
 tests/cases/compiler/duplicateClassElements.ts(4,12): error TS2393: Duplicate function implementation.
 tests/cases/compiler/duplicateClassElements.ts(6,12): error TS2393: Duplicate function implementation.
 tests/cases/compiler/duplicateClassElements.ts(8,12): error TS2300: Duplicate identifier 'x'.
-tests/cases/compiler/duplicateClassElements.ts(9,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(9,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/compiler/duplicateClassElements.ts(12,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(12,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/compiler/duplicateClassElements.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/duplicateClassElements.ts(18,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(21,12): error TS2300: Duplicate identifier 'z'.
-tests/cases/compiler/duplicateClassElements.ts(23,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(23,9): error TS2300: Duplicate identifier 'z'.
-tests/cases/compiler/duplicateClassElements.ts(26,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(26,9): error TS2300: Duplicate identifier 'z'.
-tests/cases/compiler/duplicateClassElements.ts(29,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/duplicateClassElements.ts(32,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(34,12): error TS2300: Duplicate identifier 'x2'.
 tests/cases/compiler/duplicateClassElements.ts(34,12): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x2' must be of type 'number', but here has type 'any'.
-tests/cases/compiler/duplicateClassElements.ts(36,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(36,9): error TS2300: Duplicate identifier 'z2'.
-tests/cases/compiler/duplicateClassElements.ts(39,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(39,9): error TS2300: Duplicate identifier 'z2'.
 tests/cases/compiler/duplicateClassElements.ts(41,12): error TS2300: Duplicate identifier 'z2'.
 
 
-==== tests/cases/compiler/duplicateClassElements.ts (24 errors) ====
+==== tests/cases/compiler/duplicateClassElements.ts (14 errors) ====
     class a {
         public a;
         public a;
@@ -43,26 +33,18 @@ tests/cases/compiler/duplicateClassElements.ts(41,12): error TS2300: Duplicate i
 !!! error TS2300: Duplicate identifier 'x'.
         get x() {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'x'.
             return 10;
         }
         set x(_x: number) {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'x'.
         }
     
         get y() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return "Hello";
         }
         set y(_y: string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         }
     
         public z() {
@@ -71,26 +53,18 @@ tests/cases/compiler/duplicateClassElements.ts(41,12): error TS2300: Duplicate i
         }
         get z() {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'z'.
             return "Hello";
         }
         set z(_y: string) {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'z'.
         }
     
         get x2() {
-            ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         }
         set x2(_x: number) {
-            ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         }
         public x2;
                ~~
@@ -100,15 +74,11 @@ tests/cases/compiler/duplicateClassElements.ts(41,12): error TS2300: Duplicate i
     
         get z2() {
             ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~
 !!! error TS2300: Duplicate identifier 'z2'.
             return "Hello";
         }
         set z2(_y: string) {
             ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~
 !!! error TS2300: Duplicate identifier 'z2'.
         }
         public z2() {
diff --git a/tests/baselines/reference/duplicateLocalVariable1.js b/tests/baselines/reference/duplicateLocalVariable1.js
index 61e8dcd02f872..87f730668b9d3 100644
--- a/tests/baselines/reference/duplicateLocalVariable1.js
+++ b/tests/baselines/reference/duplicateLocalVariable1.js
@@ -346,7 +346,7 @@ export var tests: TestRunner = (function () {
 
 //// [duplicateLocalVariable1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 / /;
 commonjs;
 var TestFileDir = ".\\TempTestFiles";
diff --git a/tests/baselines/reference/duplicateLocalVariable2.js b/tests/baselines/reference/duplicateLocalVariable2.js
index 2962e544b9b94..b799d03ba16e8 100644
--- a/tests/baselines/reference/duplicateLocalVariable2.js
+++ b/tests/baselines/reference/duplicateLocalVariable2.js
@@ -38,7 +38,7 @@ export var tests: TestRunner = (function () {
 //// [duplicateLocalVariable2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var TestCase = (function () {
         function TestCase(name, test, errorMessageRegEx) {
             this.name = name;
diff --git a/tests/baselines/reference/duplicateStringNamedProperty1.js b/tests/baselines/reference/duplicateStringNamedProperty1.js
index 5a6d5d7a8db64..f1b83ece11fa3 100644
--- a/tests/baselines/reference/duplicateStringNamedProperty1.js
+++ b/tests/baselines/reference/duplicateStringNamedProperty1.js
@@ -6,4 +6,4 @@ export interface Album {
 
 //// [duplicateStringNamedProperty1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/duplicateSymbolsExportMatching.js b/tests/baselines/reference/duplicateSymbolsExportMatching.js
index 5f5590e2b417e..ebf9cec0eb24a 100644
--- a/tests/baselines/reference/duplicateSymbolsExportMatching.js
+++ b/tests/baselines/reference/duplicateSymbolsExportMatching.js
@@ -68,7 +68,7 @@ export interface D { }
 //// [duplicateSymbolsExportMatching.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // Should report error only once for instantiated module
     var M;
     (function (M) {
diff --git a/tests/baselines/reference/dynamicModuleTypecheckError.js b/tests/baselines/reference/dynamicModuleTypecheckError.js
index 2c94e692dd015..7e8e47c68a61e 100644
--- a/tests/baselines/reference/dynamicModuleTypecheckError.js
+++ b/tests/baselines/reference/dynamicModuleTypecheckError.js
@@ -10,7 +10,7 @@ for(var i = 0; i < 30; i++) {
 
 //// [dynamicModuleTypecheckError.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 for (var i = 0; i < 30; i++) {
     exports.x = i * 1000; // should not be an error here
diff --git a/tests/baselines/reference/elidingImportNames.js b/tests/baselines/reference/elidingImportNames.js
index 6b1d7968c9bb6..9bc8d28731f33 100644
--- a/tests/baselines/reference/elidingImportNames.js
+++ b/tests/baselines/reference/elidingImportNames.js
@@ -16,15 +16,15 @@ export var main = 10;
 
 //// [elidingImportNames_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.main = 10;
 //// [elidingImportNames_main1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.main = 10;
 //// [elidingImportNames_test.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a = require("./elidingImportNames_main"); // alias used in typeof
 var b = a;
 var x;
diff --git a/tests/baselines/reference/emptyModuleName.js b/tests/baselines/reference/emptyModuleName.js
index d98359d94bbab..81c552de9b655 100644
--- a/tests/baselines/reference/emptyModuleName.js
+++ b/tests/baselines/reference/emptyModuleName.js
@@ -15,7 +15,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = require("");
 var B = (function (_super) {
     __extends(B, _super);
diff --git a/tests/baselines/reference/enumFromExternalModule.js b/tests/baselines/reference/enumFromExternalModule.js
index 2a1865d3ccd0d..845253ce65636 100644
--- a/tests/baselines/reference/enumFromExternalModule.js
+++ b/tests/baselines/reference/enumFromExternalModule.js
@@ -12,14 +12,14 @@ var x = f.Mode.Open;
 
 //// [enumFromExternalModule_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Mode;
 (function (Mode) {
     Mode[Mode["Open"] = 0] = "Open";
 })(Mode = exports.Mode || (exports.Mode = {}));
 //// [enumFromExternalModule_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='enumFromExternalModule_0.ts'/>
 var f = require("./enumFromExternalModule_0");
 var x = f.Mode.Open;
diff --git a/tests/baselines/reference/errorSuperPropertyAccess.errors.txt b/tests/baselines/reference/errorSuperPropertyAccess.errors.txt
index 7fd6e467eafdc..bb404b9530914 100644
--- a/tests/baselines/reference/errorSuperPropertyAccess.errors.txt
+++ b/tests/baselines/reference/errorSuperPropertyAccess.errors.txt
@@ -5,32 +5,24 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(15,9): error TS2335: 'super' can only be referenced in a derived class.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(16,9): error TS2335: 'super' can only be referenced in a derived class.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(21,9): error TS2335: 'super' can only be referenced in a derived class.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(24,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(25,9): error TS2335: 'super' can only be referenced in a derived class.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(29,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(30,9): error TS2335: 'super' can only be referenced in a derived class.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(57,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(61,23): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(64,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(65,23): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(68,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(69,19): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(73,13): error TS2660: 'super' can only be referenced in members of derived classes or object literal expressions.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(76,40): error TS2660: 'super' can only be referenced in members of derived classes or object literal expressions.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(87,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(91,23): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(94,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(95,23): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(98,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(99,19): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(109,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(110,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(111,15): error TS2341: Property 'privateStaticFunc' is private and only accessible within class 'SomeBase'.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(113,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(114,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(115,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(116,15): error TS2341: Property 'privateStaticFunc' is private and only accessible within class 'SomeBase'.
-tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(119,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(120,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(121,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(122,15): error TS2341: Property 'privateStaticFunc' is private and only accessible within class 'SomeBase'.
@@ -38,7 +30,7 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
 tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts(127,30): error TS2660: 'super' can only be referenced in members of derived classes or object literal expressions.
 
 
-==== tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts (38 errors) ====
+==== tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess.ts (30 errors) ====
     //super property access in constructor of class with no base type
     //super property access in instance member function of class with no base type
     //super property access in instance member accessor(get and set) of class with no base type
@@ -77,8 +69,6 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
         }
     
         public static get static2() {
-                          ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             super.hasOwnProperty('');
             ~~~~~
 !!! error TS2335: 'super' can only be referenced in a derived class.
@@ -86,8 +76,6 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
         }
     
         public static set static2(n) {
-                          ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             super.hasOwnProperty('');
             ~~~~~
 !!! error TS2335: 'super' can only be referenced in a derived class.
@@ -129,16 +117,12 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
         }
     
         get a() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x = super.publicMember;
                           ~~~~~~~~~~~~
 !!! error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
             return undefined;
         }
         set a(n) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             n = super.publicMember;
                       ~~~~~~~~~~~~
 !!! error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
@@ -175,16 +159,12 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
         }
     
         get a() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var x = super.privateMember;
                           ~~~~~~~~~~~~~
 !!! error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
             return undefined;
         }
         set a(n) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             n = super.privateMember;
                       ~~~~~~~~~~~~~
 !!! error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
@@ -208,8 +188,6 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
 !!! error TS2341: Property 'privateStaticFunc' is private and only accessible within class 'SomeBase'.
         }
         static get a() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             super.publicStaticMember = 3;
                   ~~~~~~~~~~~~~~~~~~
 !!! error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
@@ -222,8 +200,6 @@ tests/cases/conformance/expressions/superPropertyAccess/errorSuperPropertyAccess
             return '';
         }
         static set a(n) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             super.publicStaticMember = 3;
                   ~~~~~~~~~~~~~~~~~~
 !!! error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
diff --git a/tests/baselines/reference/errorsInGenericTypeReference.errors.txt b/tests/baselines/reference/errorsInGenericTypeReference.errors.txt
index c459eee92901a..3c4f7d2dc2ca1 100644
--- a/tests/baselines/reference/errorsInGenericTypeReference.errors.txt
+++ b/tests/baselines/reference/errorsInGenericTypeReference.errors.txt
@@ -2,7 +2,6 @@ tests/cases/compiler/errorsInGenericTypeReference.ts(11,17): error TS2304: Canno
 tests/cases/compiler/errorsInGenericTypeReference.ts(17,31): error TS2304: Cannot find name 'V'.
 tests/cases/compiler/errorsInGenericTypeReference.ts(22,29): error TS2304: Cannot find name 'V'.
 tests/cases/compiler/errorsInGenericTypeReference.ts(23,36): error TS2304: Cannot find name 'V'.
-tests/cases/compiler/errorsInGenericTypeReference.ts(24,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/errorsInGenericTypeReference.ts(24,27): error TS2304: Cannot find name 'V'.
 tests/cases/compiler/errorsInGenericTypeReference.ts(25,24): error TS2304: Cannot find name 'V'.
 tests/cases/compiler/errorsInGenericTypeReference.ts(30,36): error TS2304: Cannot find name 'V'.
@@ -22,7 +21,7 @@ tests/cases/compiler/errorsInGenericTypeReference.ts(67,40): error TS2304: Canno
 tests/cases/compiler/errorsInGenericTypeReference.ts(68,24): error TS2304: Cannot find name 'V'.
 
 
-==== tests/cases/compiler/errorsInGenericTypeReference.ts (22 errors) ====
+==== tests/cases/compiler/errorsInGenericTypeReference.ts (21 errors) ====
     interface IFoo<T> { }
     
     class Foo<T> { }
@@ -55,8 +54,6 @@ tests/cases/compiler/errorsInGenericTypeReference.ts(68,24): error TS2304: Canno
                                        ~
 !!! error TS2304: Cannot find name 'V'.
         set a(value: Foo<{ x: V }>) { } // error: could not find symbol V
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                               ~
 !!! error TS2304: Cannot find name 'V'.
         property: Foo<{ x: V }>; // error: could not find symbol V
diff --git a/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt b/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt
index 137b76f660d0a..1faa57d122dad 100644
--- a/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt
+++ b/tests/baselines/reference/es3-oldStyleOctalLiteralInEnums.errors.txt
@@ -1,13 +1,13 @@
-tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(2,7): error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '-0o1'.
-tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(3,7): error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '0o2'.
+tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(2,7): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts(3,7): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2'.
 
 
 ==== tests/cases/compiler/es3-oldStyleOctalLiteralInEnums.ts (2 errors) ====
     enum E {
       x = -01,
           ~~~
-!!! error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '-0o1'.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
       y = 02,
           ~~
-!!! error TS8018: Octal literals are not allowed in enums members initializer. Use the syntax '0o2'.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt b/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt
index 5fc9843989cec..a628ec16f64a6 100644
--- a/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt
+++ b/tests/baselines/reference/es3-oldStyleOctalLiteralTypes.errors.txt
@@ -1,12 +1,12 @@
-tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(1,8): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '0o10'.
-tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(2,8): error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '-0o20'.
+tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(1,8): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o10'.
+tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts(2,8): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o20'.
 
 
 ==== tests/cases/compiler/es3-oldStyleOctalLiteralTypes.ts (2 errors) ====
     let x: 010;
            ~~~
-!!! error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '0o10'.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o10'.
     let y: -020;
            ~~~~
-!!! error TS8017: Octal literal types must use ES2015 syntax. Use the syntax '-0o20'.
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o20'.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/es3defaultAliasIsQuoted.js b/tests/baselines/reference/es3defaultAliasIsQuoted.js
index ea12fc7a3d62d..531bf64488e90 100644
--- a/tests/baselines/reference/es3defaultAliasIsQuoted.js
+++ b/tests/baselines/reference/es3defaultAliasIsQuoted.js
@@ -15,7 +15,7 @@ assert(Foo.CONSTANT === "Foo");
 
 //// [es3defaultAliasQuoted_file0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = (function () {
     function Foo() {
     }
@@ -27,9 +27,9 @@ function assert(value) {
     if (!value)
         throw new Error("Assertion failed!");
 }
-exports["default"] = assert;
+exports.default = assert;
 //// [es3defaultAliasQuoted_file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var es3defaultAliasQuoted_file0_1 = require("./es3defaultAliasQuoted_file0");
-es3defaultAliasQuoted_file0_1["default"](es3defaultAliasQuoted_file0_1.Foo.CONSTANT === "Foo");
+es3defaultAliasQuoted_file0_1.default(es3defaultAliasQuoted_file0_1.Foo.CONSTANT === "Foo");
diff --git a/tests/baselines/reference/es6ClassTest2.errors.txt b/tests/baselines/reference/es6ClassTest2.errors.txt
index 0b68e1cd784e4..d00f9b9232ad3 100644
--- a/tests/baselines/reference/es6ClassTest2.errors.txt
+++ b/tests/baselines/reference/es6ClassTest2.errors.txt
@@ -1,9 +1,7 @@
 tests/cases/compiler/es6ClassTest2.ts(17,1): error TS2304: Cannot find name 'console'.
-tests/cases/compiler/es6ClassTest2.ts(30,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/es6ClassTest2.ts(35,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/es6ClassTest2.ts (3 errors) ====
+==== tests/cases/compiler/es6ClassTest2.ts (1 errors) ====
     class BasicMonster {
         constructor(public name: string, public health: number) {
     
@@ -36,15 +34,11 @@ tests/cases/compiler/es6ClassTest2.ts(35,9): error TS1056: Accessors are only av
       // a curly body defines a getter in the same way that "get"
       // defines one in an object literal.
         get isAlive() {
-            ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return this._health > 0;
         }
     
       // Likewise, "set" can be used to define setters.
         set health(value: number) {
-            ~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             if (value < 0) {
                 throw new Error('Health must be non-negative.')
         }
diff --git a/tests/baselines/reference/es6ClassTest5.js b/tests/baselines/reference/es6ClassTest5.js
index 7d4238fda65b1..b909fac58b50f 100644
--- a/tests/baselines/reference/es6ClassTest5.js
+++ b/tests/baselines/reference/es6ClassTest5.js
@@ -23,7 +23,7 @@ var C1T5 = (function () {
 }());
 var bigClass = (function () {
     function bigClass() {
-        this["break"] = 1;
+        this.break = 1;
     }
     return bigClass;
 }());
diff --git a/tests/baselines/reference/es6ExportEqualsInterop.js b/tests/baselines/reference/es6ExportEqualsInterop.js
index 5e04221df8b8f..a9564e8936b12 100644
--- a/tests/baselines/reference/es6ExportEqualsInterop.js
+++ b/tests/baselines/reference/es6ExportEqualsInterop.js
@@ -212,7 +212,7 @@ export * from "class-module";
 function __export(m) {
     for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
 }
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var z2 = require("variable");
 var z3 = require("interface-variable");
 var z4 = require("module");
diff --git a/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamedImportDts.js b/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamedImportDts.js
index 0809a5278f0c6..e348c83aa3d5e 100644
--- a/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamedImportDts.js
+++ b/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamedImportDts.js
@@ -25,7 +25,7 @@ export var x6 = new m();
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a = (function () {
     function a() {
     }
@@ -64,7 +64,7 @@ var x11 = (function () {
 exports.x11 = x11;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var server_1 = require("./server");
 exports.x1 = new server_1.a();
 var server_2 = require("./server");
diff --git a/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingDts.js b/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingDts.js
index b153fb042eb6c..d70719585647f 100644
--- a/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingDts.js
+++ b/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingDts.js
@@ -9,7 +9,7 @@ export var x = new nameSpaceBinding.a();
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a = (function () {
     function a() {
     }
@@ -18,7 +18,7 @@ var a = (function () {
 exports.a = a;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var nameSpaceBinding = require("./server");
 exports.x = new nameSpaceBinding.a();
 
diff --git a/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingWithExport.js b/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingWithExport.js
index ded9e2811a270..230f1a5069c70 100644
--- a/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingWithExport.js
+++ b/tests/baselines/reference/es6ImportDefaultBindingFollowedWithNamespaceBindingWithExport.js
@@ -9,11 +9,11 @@ export var x: number = nameSpaceBinding.a;
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = 10;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var nameSpaceBinding = require("./server");
 exports.x = nameSpaceBinding.a;
 
diff --git a/tests/baselines/reference/es6ImportDefaultBindingNoDefaultProperty.js b/tests/baselines/reference/es6ImportDefaultBindingNoDefaultProperty.js
index 0b233910696c7..66870d1c03d17 100644
--- a/tests/baselines/reference/es6ImportDefaultBindingNoDefaultProperty.js
+++ b/tests/baselines/reference/es6ImportDefaultBindingNoDefaultProperty.js
@@ -9,8 +9,8 @@ import defaultBinding from "./es6ImportDefaultBindingNoDefaultProperty_0";
 
 //// [es6ImportDefaultBindingNoDefaultProperty_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = 10;
 //// [es6ImportDefaultBindingNoDefaultProperty_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/es6ImportNameSpaceImportAmd.js b/tests/baselines/reference/es6ImportNameSpaceImportAmd.js
index 44a0635f7a2db..ecb945dfd9172 100644
--- a/tests/baselines/reference/es6ImportNameSpaceImportAmd.js
+++ b/tests/baselines/reference/es6ImportNameSpaceImportAmd.js
@@ -12,13 +12,13 @@ import * as nameSpaceBinding2 from "es6ImportNameSpaceImportAmd_0"; // elide thi
 //// [es6ImportNameSpaceImportAmd_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = 10;
 });
 //// [es6ImportNameSpaceImportAmd_1.js]
 define(["require", "exports", "es6ImportNameSpaceImportAmd_0"], function (require, exports, nameSpaceBinding) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = nameSpaceBinding.a;
 });
 
diff --git a/tests/baselines/reference/es6ImportNameSpaceImportDts.js b/tests/baselines/reference/es6ImportNameSpaceImportDts.js
index d57f881de91ad..04530f523fc0b 100644
--- a/tests/baselines/reference/es6ImportNameSpaceImportDts.js
+++ b/tests/baselines/reference/es6ImportNameSpaceImportDts.js
@@ -10,7 +10,7 @@ import * as nameSpaceBinding2 from "./server"; // unreferenced
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var c = (function () {
     function c() {
     }
@@ -20,7 +20,7 @@ exports.c = c;
 ;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var nameSpaceBinding = require("./server");
 exports.x = new nameSpaceBinding.c();
 
diff --git a/tests/baselines/reference/es6ImportNameSpaceImportWithExport.js b/tests/baselines/reference/es6ImportNameSpaceImportWithExport.js
index 57aa0cf0c05c3..28a3baf24eac1 100644
--- a/tests/baselines/reference/es6ImportNameSpaceImportWithExport.js
+++ b/tests/baselines/reference/es6ImportNameSpaceImportWithExport.js
@@ -12,13 +12,13 @@ export import * as nameSpaceBinding2 from "server"; // Not referenced imports
 //// [server.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = 10;
 });
 //// [client.js]
 define(["require", "exports", "server"], function (require, exports, nameSpaceBinding) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = nameSpaceBinding.a;
 });
 
diff --git a/tests/baselines/reference/es6ImportNamedImportAmd.js b/tests/baselines/reference/es6ImportNamedImportAmd.js
index 8f1a7cb013b2f..74bc50d8abceb 100644
--- a/tests/baselines/reference/es6ImportNamedImportAmd.js
+++ b/tests/baselines/reference/es6ImportNamedImportAmd.js
@@ -43,7 +43,7 @@ import { aaaa as bbbb } from "es6ImportNamedImportAmd_0";
 //// [es6ImportNamedImportAmd_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = 10;
     exports.x = exports.a;
     exports.m = exports.a;
@@ -56,7 +56,7 @@ define(["require", "exports"], function (require, exports) {
 //// [es6ImportNamedImportAmd_1.js]
 define(["require", "exports", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0", "es6ImportNamedImportAmd_0"], function (require, exports, es6ImportNamedImportAmd_0_1, es6ImportNamedImportAmd_0_2, es6ImportNamedImportAmd_0_3, es6ImportNamedImportAmd_0_4, es6ImportNamedImportAmd_0_5, es6ImportNamedImportAmd_0_6, es6ImportNamedImportAmd_0_7, es6ImportNamedImportAmd_0_8, es6ImportNamedImportAmd_0_9) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var xxxx = es6ImportNamedImportAmd_0_1.a;
     var xxxx = es6ImportNamedImportAmd_0_2.a;
     var xxxx = es6ImportNamedImportAmd_0_3.x;
diff --git a/tests/baselines/reference/es6ImportNamedImportDts.js b/tests/baselines/reference/es6ImportNamedImportDts.js
index 0ce09d4b180bf..ea802612dfbb0 100644
--- a/tests/baselines/reference/es6ImportNamedImportDts.js
+++ b/tests/baselines/reference/es6ImportNamedImportDts.js
@@ -47,7 +47,7 @@ import { aaaa1 as bbbb } from "./server";
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a = (function () {
     function a() {
     }
@@ -134,7 +134,7 @@ var aaaa1 = (function () {
 exports.aaaa1 = aaaa1;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var server_1 = require("./server");
 exports.xxxx = new server_1.a();
 var server_2 = require("./server");
diff --git a/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.js b/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.js
index 3acd2f9c4a075..9427a87080252 100644
--- a/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.js
+++ b/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.js
@@ -13,7 +13,7 @@ export = x;
 
 //// [es6ImportNamedImportInIndirectExportAssignment_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     var c = (function () {
diff --git a/tests/baselines/reference/es6ImportNamedImportMergeErrors.js b/tests/baselines/reference/es6ImportNamedImportMergeErrors.js
index 61b2cbf76b3e2..ac85375fdfcb5 100644
--- a/tests/baselines/reference/es6ImportNamedImportMergeErrors.js
+++ b/tests/baselines/reference/es6ImportNamedImportMergeErrors.js
@@ -21,13 +21,13 @@ import { z1 as z } from "./es6ImportNamedImportMergeErrors_0"; // should be erro
 
 //// [es6ImportNamedImportMergeErrors_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = 10;
 exports.x = exports.a;
 exports.z = exports.a;
 exports.z1 = exports.a;
 //// [es6ImportNamedImportMergeErrors_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = 10;
 var x44 = 10;
diff --git a/tests/baselines/reference/es6ImportNamedImportNoExportMember.js b/tests/baselines/reference/es6ImportNamedImportNoExportMember.js
index 2c8e9fe5fecfd..557fcdb62472f 100644
--- a/tests/baselines/reference/es6ImportNamedImportNoExportMember.js
+++ b/tests/baselines/reference/es6ImportNamedImportNoExportMember.js
@@ -10,9 +10,9 @@ import { x1 as x } from "./es6ImportNamedImportNoExportMember_0";
 
 //// [es6ImportNamedImportNoExportMember_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = 10;
 exports.x = exports.a;
 //// [es6ImportNamedImport_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/es6ImportNamedImportWithExport.js b/tests/baselines/reference/es6ImportNamedImportWithExport.js
index b864f86258ef1..0a791ed67b570 100644
--- a/tests/baselines/reference/es6ImportNamedImportWithExport.js
+++ b/tests/baselines/reference/es6ImportNamedImportWithExport.js
@@ -41,7 +41,7 @@ export import { aaaa as bbbb } from "./server";
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = 10;
 exports.x = exports.a;
 exports.m = exports.a;
@@ -52,7 +52,7 @@ exports.z2 = 10;
 exports.aaaa = 10;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var server_1 = require("./server");
 exports.xxxx = server_1.a;
 var server_2 = require("./server");
diff --git a/tests/baselines/reference/es6ImportNamedImportWithTypesAndValues.js b/tests/baselines/reference/es6ImportNamedImportWithTypesAndValues.js
index 2a00feccd3b59..a89090fa4f373 100644
--- a/tests/baselines/reference/es6ImportNamedImportWithTypesAndValues.js
+++ b/tests/baselines/reference/es6ImportNamedImportWithTypesAndValues.js
@@ -21,7 +21,7 @@ export var cVal = new C();
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
         this.prop = "hello";
@@ -38,7 +38,7 @@ var C2 = (function () {
 exports.C2 = C2;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var server_1 = require("./server"); // Shouldnt emit I and C2 into the js file and emit C and I in .d.ts file
 exports.cVal = new server_1.C();
 
diff --git a/tests/baselines/reference/es6ImportWithoutFromClauseAmd.js b/tests/baselines/reference/es6ImportWithoutFromClauseAmd.js
index f6134e3d89956..627c4473c8cdb 100644
--- a/tests/baselines/reference/es6ImportWithoutFromClauseAmd.js
+++ b/tests/baselines/reference/es6ImportWithoutFromClauseAmd.js
@@ -15,19 +15,19 @@ var _b = 10;
 //// [es6ImportWithoutFromClauseAmd_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = 10;
 });
 //// [es6ImportWithoutFromClauseAmd_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.b = 10;
 });
 //// [es6ImportWithoutFromClauseAmd_2.js]
 define(["require", "exports", "es6ImportWithoutFromClauseAmd_0", "es6ImportWithoutFromClauseAmd_2"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var _a = 10;
     var _b = 10;
 });
diff --git a/tests/baselines/reference/es6ImportWithoutFromClauseWithExport.js b/tests/baselines/reference/es6ImportWithoutFromClauseWithExport.js
index 755ec99d2584c..e5ff286a39b55 100644
--- a/tests/baselines/reference/es6ImportWithoutFromClauseWithExport.js
+++ b/tests/baselines/reference/es6ImportWithoutFromClauseWithExport.js
@@ -8,11 +8,11 @@ export import "server";
 
 //// [server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = 10;
 //// [client.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("server");
 
 
diff --git a/tests/baselines/reference/exportAndImport-es3-amd.js b/tests/baselines/reference/exportAndImport-es3-amd.js
index ff341f922b5f2..289dc26c6605a 100644
--- a/tests/baselines/reference/exportAndImport-es3-amd.js
+++ b/tests/baselines/reference/exportAndImport-es3-amd.js
@@ -14,17 +14,17 @@ export default function f2() {
 //// [m1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function f1() {
     }
-    exports["default"] = f1;
+    exports.default = f1;
 });
 //// [m2.js]
 define(["require", "exports", "./m1"], function (require, exports, m1_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function f2() {
-        m1_1["default"]();
+        m1_1.default();
     }
-    exports["default"] = f2;
+    exports.default = f2;
 });
diff --git a/tests/baselines/reference/exportAndImport-es3.js b/tests/baselines/reference/exportAndImport-es3.js
index 48b3e94a2f218..3be0240b16dca 100644
--- a/tests/baselines/reference/exportAndImport-es3.js
+++ b/tests/baselines/reference/exportAndImport-es3.js
@@ -13,15 +13,15 @@ export default function f2() {
 
 //// [m1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function f1() {
 }
-exports["default"] = f1;
+exports.default = f1;
 //// [m2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1_1 = require("./m1");
 function f2() {
-    m1_1["default"]();
+    m1_1.default();
 }
-exports["default"] = f2;
+exports.default = f2;
diff --git a/tests/baselines/reference/exportArrayBindingPattern.js b/tests/baselines/reference/exportArrayBindingPattern.js
index b556810976362..2cbd4e5000b93 100644
--- a/tests/baselines/reference/exportArrayBindingPattern.js
+++ b/tests/baselines/reference/exportArrayBindingPattern.js
@@ -5,7 +5,7 @@ export { a, b };
 
 //// [exportArrayBindingPattern.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // issue: https://github.com/Microsoft/TypeScript/issues/10778
 var _a = [1, 2, 3], a = _a[0], b = _a[2];
 exports.a = a;
diff --git a/tests/baselines/reference/exportAssignClassAndModule.js b/tests/baselines/reference/exportAssignClassAndModule.js
index 9f3eaf78480ba..6a1c317aa91af 100644
--- a/tests/baselines/reference/exportAssignClassAndModule.js
+++ b/tests/baselines/reference/exportAssignClassAndModule.js
@@ -28,7 +28,7 @@ var Foo = (function () {
 module.exports = Foo;
 //// [exportAssignClassAndModule_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var z;
 var zz;
 zz.x;
diff --git a/tests/baselines/reference/exportAssignDottedName.js b/tests/baselines/reference/exportAssignDottedName.js
index 592d97dbaa0d3..133b5cb906eb9 100644
--- a/tests/baselines/reference/exportAssignDottedName.js
+++ b/tests/baselines/reference/exportAssignDottedName.js
@@ -12,7 +12,7 @@ export = foo1.x; // Ok
 
 //// [foo1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function x() {
     return true;
 }
diff --git a/tests/baselines/reference/exportAssignImportedIdentifier.js b/tests/baselines/reference/exportAssignImportedIdentifier.js
index 208df4eff6300..54c31e61a3b15 100644
--- a/tests/baselines/reference/exportAssignImportedIdentifier.js
+++ b/tests/baselines/reference/exportAssignImportedIdentifier.js
@@ -16,7 +16,7 @@ var x = foo2(); // should be boolean
 
 //// [foo1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function x() {
     return true;
 }
@@ -28,6 +28,6 @@ var x = foo1.x;
 module.exports = x;
 //// [foo3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo2 = require("./foo2");
 var x = foo2(); // should be boolean
diff --git a/tests/baselines/reference/exportAssignTypes.js b/tests/baselines/reference/exportAssignTypes.js
index bed4480f3935d..8033907637eae 100644
--- a/tests/baselines/reference/exportAssignTypes.js
+++ b/tests/baselines/reference/exportAssignTypes.js
@@ -85,7 +85,7 @@ function x(a) {
 module.exports = x;
 //// [consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var iString = require("./expString");
 var v1 = iString;
 var iNumber = require("./expNumber");
diff --git a/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js b/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js
index 2d36cffdd176e..afe0f74d66a07 100644
--- a/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js
+++ b/tests/baselines/reference/exportAssignedTypeAsTypeAnnotation.js
@@ -16,11 +16,11 @@ var t2: test; // should not raise a 'container type' error
 //// [exportAssignedTypeAsTypeAnnotation_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [exportAssignedTypeAsTypeAnnotation_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var t2; // should not raise a 'container type' error
 });
diff --git a/tests/baselines/reference/exportAssignmentClass.js b/tests/baselines/reference/exportAssignmentClass.js
index 549ad5bbd4dcb..4d816325ce116 100644
--- a/tests/baselines/reference/exportAssignmentClass.js
+++ b/tests/baselines/reference/exportAssignmentClass.js
@@ -25,7 +25,7 @@ define(["require", "exports"], function (require, exports) {
 //// [exportAssignmentClass_B.js]
 define(["require", "exports", "exportAssignmentClass_A"], function (require, exports, D) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = new D();
     var x = d.p;
 });
diff --git a/tests/baselines/reference/exportAssignmentConstrainedGenericType.js b/tests/baselines/reference/exportAssignmentConstrainedGenericType.js
index eddbddf8d6d87..f17bbca5bac02 100644
--- a/tests/baselines/reference/exportAssignmentConstrainedGenericType.js
+++ b/tests/baselines/reference/exportAssignmentConstrainedGenericType.js
@@ -24,7 +24,7 @@ var Foo = (function () {
 module.exports = Foo;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./foo_0");
 var x = new foo(true); // Should error
 var y = new foo({ a: "test", b: 42 }); // Should be OK
diff --git a/tests/baselines/reference/exportAssignmentEnum.js b/tests/baselines/reference/exportAssignmentEnum.js
index a32da0a2e3f78..30af5e8e19e51 100644
--- a/tests/baselines/reference/exportAssignmentEnum.js
+++ b/tests/baselines/reference/exportAssignmentEnum.js
@@ -27,7 +27,7 @@ var E;
 module.exports = E;
 //// [exportAssignmentEnum_B.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var EnumE = require("./exportAssignmentEnum_A");
 var a = EnumE.A;
 var b = EnumE.B;
diff --git a/tests/baselines/reference/exportAssignmentFunction.js b/tests/baselines/reference/exportAssignmentFunction.js
index 775bb6b1af195..144c143822532 100644
--- a/tests/baselines/reference/exportAssignmentFunction.js
+++ b/tests/baselines/reference/exportAssignmentFunction.js
@@ -19,6 +19,6 @@ define(["require", "exports"], function (require, exports) {
 //// [exportAssignmentFunction_B.js]
 define(["require", "exports", "exportAssignmentFunction_A"], function (require, exports, fooFunc) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var n = fooFunc();
 });
diff --git a/tests/baselines/reference/exportAssignmentGenericType.js b/tests/baselines/reference/exportAssignmentGenericType.js
index 95563aa36a9dd..2d466f9546209 100644
--- a/tests/baselines/reference/exportAssignmentGenericType.js
+++ b/tests/baselines/reference/exportAssignmentGenericType.js
@@ -22,7 +22,7 @@ var Foo = (function () {
 module.exports = Foo;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./foo_0");
 var x = new foo();
 var y = x.test;
diff --git a/tests/baselines/reference/exportAssignmentInterface.js b/tests/baselines/reference/exportAssignmentInterface.js
index f3cc9ae9bbe8c..bf2ba0932a395 100644
--- a/tests/baselines/reference/exportAssignmentInterface.js
+++ b/tests/baselines/reference/exportAssignmentInterface.js
@@ -17,12 +17,12 @@ var n: number = i.p1;
 //// [exportAssignmentInterface_A.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [exportAssignmentInterface_B.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var i;
     var n = i.p1;
 });
diff --git a/tests/baselines/reference/exportAssignmentInternalModule.js b/tests/baselines/reference/exportAssignmentInternalModule.js
index b5c45785f8ff0..d7bdb367a3774 100644
--- a/tests/baselines/reference/exportAssignmentInternalModule.js
+++ b/tests/baselines/reference/exportAssignmentInternalModule.js
@@ -23,6 +23,6 @@ define(["require", "exports"], function (require, exports) {
 //// [exportAssignmentInternalModule_B.js]
 define(["require", "exports", "exportAssignmentInternalModule_A"], function (require, exports, modM) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var n = modM.x;
 });
diff --git a/tests/baselines/reference/exportAssignmentMergedInterface.js b/tests/baselines/reference/exportAssignmentMergedInterface.js
index 3ee760dedfa54..421088c1c91ae 100644
--- a/tests/baselines/reference/exportAssignmentMergedInterface.js
+++ b/tests/baselines/reference/exportAssignmentMergedInterface.js
@@ -25,12 +25,12 @@ z = x.d;
 //// [foo_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [foo_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x;
     x("test");
     x(42);
diff --git a/tests/baselines/reference/exportAssignmentMergedModule.js b/tests/baselines/reference/exportAssignmentMergedModule.js
index ef48895b5cb7c..7b6144c9074ed 100644
--- a/tests/baselines/reference/exportAssignmentMergedModule.js
+++ b/tests/baselines/reference/exportAssignmentMergedModule.js
@@ -47,7 +47,7 @@ var Foo;
 module.exports = Foo;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./foo_0");
 var a = foo.a();
 if (!!foo.b) {
diff --git a/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js b/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js
index 6c61eeedfc110..db6b9e2fb3ef5 100644
--- a/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js
+++ b/tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.js
@@ -18,10 +18,10 @@ var b = z(); // call signature - no error
 
 //// [exportAssignmentOfDeclaredExternalModule_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [exportAssignmentOfDeclaredExternalModule_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = new Sammy(); // error to use as constructor as there is not constructor symbol
 var y = Sammy(); // error to use interface name as call target
 var z; // no error - z is of type interface Sammy from module 'M'
diff --git a/tests/baselines/reference/exportAssignmentOfGenericType1.js b/tests/baselines/reference/exportAssignmentOfGenericType1.js
index 9cd15ec01a4c4..b80635f11f6df 100644
--- a/tests/baselines/reference/exportAssignmentOfGenericType1.js
+++ b/tests/baselines/reference/exportAssignmentOfGenericType1.js
@@ -36,7 +36,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 define(["require", "exports", "exportAssignmentOfGenericType1_0"], function (require, exports, q) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var M = (function (_super) {
         __extends(M, _super);
         function M() {
diff --git a/tests/baselines/reference/exportAssignmentTopLevelClodule.js b/tests/baselines/reference/exportAssignmentTopLevelClodule.js
index f4001e5ab1572..7855f12b75959 100644
--- a/tests/baselines/reference/exportAssignmentTopLevelClodule.js
+++ b/tests/baselines/reference/exportAssignmentTopLevelClodule.js
@@ -33,7 +33,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     if (foo.answer === 42) {
         var x = new foo();
     }
diff --git a/tests/baselines/reference/exportAssignmentTopLevelEnumdule.js b/tests/baselines/reference/exportAssignmentTopLevelEnumdule.js
index 7ba5a655c2010..8a6d50840a93a 100644
--- a/tests/baselines/reference/exportAssignmentTopLevelEnumdule.js
+++ b/tests/baselines/reference/exportAssignmentTopLevelEnumdule.js
@@ -34,7 +34,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var color;
     if (color === foo.green) {
         color = foo.answer;
diff --git a/tests/baselines/reference/exportAssignmentTopLevelFundule.js b/tests/baselines/reference/exportAssignmentTopLevelFundule.js
index f122b8fbe8b06..ea3407bacb170 100644
--- a/tests/baselines/reference/exportAssignmentTopLevelFundule.js
+++ b/tests/baselines/reference/exportAssignmentTopLevelFundule.js
@@ -30,7 +30,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     if (foo.answer === 42) {
         var x = foo();
     }
diff --git a/tests/baselines/reference/exportAssignmentTopLevelIdentifier.js b/tests/baselines/reference/exportAssignmentTopLevelIdentifier.js
index a7acbaf34967c..8a804bb03a93f 100644
--- a/tests/baselines/reference/exportAssignmentTopLevelIdentifier.js
+++ b/tests/baselines/reference/exportAssignmentTopLevelIdentifier.js
@@ -25,7 +25,7 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     if (foo.answer === 42) {
     }
 });
diff --git a/tests/baselines/reference/exportAssignmentVariable.js b/tests/baselines/reference/exportAssignmentVariable.js
index e6ccdb46f9a5e..db9151151af82 100644
--- a/tests/baselines/reference/exportAssignmentVariable.js
+++ b/tests/baselines/reference/exportAssignmentVariable.js
@@ -16,6 +16,6 @@ var x = 0;
 module.exports = x;
 //// [exportAssignmentVariable_B.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var y = require("./exportAssignmentVariable_A");
 var n = y;
diff --git a/tests/baselines/reference/exportBinding.js b/tests/baselines/reference/exportBinding.js
index 3e0f23ad31d30..ad091e59dbc88 100644
--- a/tests/baselines/reference/exportBinding.js
+++ b/tests/baselines/reference/exportBinding.js
@@ -19,8 +19,8 @@ var y = 'y'
 
 //// [exportConsts.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = x;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = x;
 var x = 'x';
 exports.x = x;
 exports.xx = x;
@@ -32,8 +32,8 @@ var Y = (function () {
 exports.Z = Y;
 //// [exportVars.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = y;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = y;
 var y = 'y';
 exports.y = y;
 exports.yy = y;
diff --git a/tests/baselines/reference/exportClassExtendingIntersection.js b/tests/baselines/reference/exportClassExtendingIntersection.js
index 919f1695093a8..5dbd8f7a17bf8 100644
--- a/tests/baselines/reference/exportClassExtendingIntersection.js
+++ b/tests/baselines/reference/exportClassExtendingIntersection.js
@@ -37,7 +37,7 @@ const AnotherMixedClass = MyMixin(MyExtendedClass);
 
 //// [BaseClass.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var MyBaseClass = (function () {
     function MyBaseClass(value) {
     }
@@ -56,7 +56,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function MyMixin(base) {
     return (function (_super) {
         __extends(class_1, _super);
@@ -79,7 +79,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var BaseClass_1 = require("./BaseClass");
 var MixinClass_1 = require("./MixinClass");
 var MyExtendedClass = (function (_super) {
@@ -92,7 +92,7 @@ var MyExtendedClass = (function (_super) {
 exports.MyExtendedClass = MyExtendedClass;
 //// [Main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var FinalClass_1 = require("./FinalClass");
 var MixinClass_1 = require("./MixinClass");
 var myExtendedClass = new FinalClass_1.MyExtendedClass('string');
diff --git a/tests/baselines/reference/exportDeclarationWithModuleSpecifierNameOnNextLine1.js b/tests/baselines/reference/exportDeclarationWithModuleSpecifierNameOnNextLine1.js
index c9c681ac40b3d..65b32f2aec08c 100644
--- a/tests/baselines/reference/exportDeclarationWithModuleSpecifierNameOnNextLine1.js
+++ b/tests/baselines/reference/exportDeclarationWithModuleSpecifierNameOnNextLine1.js
@@ -21,23 +21,23 @@ export { x as a, } from
 
 //// [t1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = "x";
 //// [t2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.x = t1_1.x;
 //// [t3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [t4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.a = t1_1.x;
 //// [t5.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.a = t1_1.x;
diff --git a/tests/baselines/reference/exportDeclarationsInAmbientNamespaces.js b/tests/baselines/reference/exportDeclarationsInAmbientNamespaces.js
index 31191e213ef26..eea02574c2a18 100644
--- a/tests/baselines/reference/exportDeclarationsInAmbientNamespaces.js
+++ b/tests/baselines/reference/exportDeclarationsInAmbientNamespaces.js
@@ -9,4 +9,4 @@ Q.try(() => { });
 
 
 //// [exportDeclarationsInAmbientNamespaces.js]
-Q["try"](function () { });
+Q.try(function () { });
diff --git a/tests/baselines/reference/exportDeclareClass1.js b/tests/baselines/reference/exportDeclareClass1.js
index 950b3db26e51d..1ce55206dca6b 100644
--- a/tests/baselines/reference/exportDeclareClass1.js
+++ b/tests/baselines/reference/exportDeclareClass1.js
@@ -12,7 +12,7 @@
 //// [exportDeclareClass1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     ;
     ;
 });
diff --git a/tests/baselines/reference/exportDeclaredModule.js b/tests/baselines/reference/exportDeclaredModule.js
index e0d3b25202546..dc1398747076d 100644
--- a/tests/baselines/reference/exportDeclaredModule.js
+++ b/tests/baselines/reference/exportDeclaredModule.js
@@ -16,6 +16,6 @@ var x: number = foo1.b();
 module.exports = M1;
 //// [foo2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo1 = require("./foo1");
 var x = foo1.b();
diff --git a/tests/baselines/reference/exportDefaultAbstractClass.js b/tests/baselines/reference/exportDefaultAbstractClass.js
index c8dba03543dc1..1936f0b1149ea 100644
--- a/tests/baselines/reference/exportDefaultAbstractClass.js
+++ b/tests/baselines/reference/exportDefaultAbstractClass.js
@@ -9,13 +9,13 @@ import A from './a'
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
     return A;
 }());
-exports["default"] = A;
+exports.default = A;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/exportDefaultProperty.js b/tests/baselines/reference/exportDefaultProperty.js
index dddea6a6b7342..7d879f5eaa150 100644
--- a/tests/baselines/reference/exportDefaultProperty.js
+++ b/tests/baselines/reference/exportDefaultProperty.js
@@ -43,7 +43,7 @@ fooLength + 1;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A;
 (function (A) {
     var B = (function () {
@@ -56,21 +56,21 @@ var A;
         B.b = 0;
     })(B = A.B || (A.B = {}));
 })(A || (A = {}));
-exports["default"] = A.B;
+exports.default = A.B;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = "foo".length;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = "foo".length;
 //// [index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="declarations.d.ts" />
 var foobar_1 = require("foobar");
-var X = foobar_1["default"].X;
+var X = foobar_1.default.X;
 var foobarx_1 = require("foobarx");
 var x = X;
-var x2 = foobarx_1["default"];
+var x2 = foobarx_1.default;
 var a_1 = require("./a");
-var b = new a_1["default"](a_1["default"].b);
+var b = new a_1.default(a_1.default.b);
 var b_1 = require("./b");
-b_1["default"] + 1;
+b_1.default + 1;
diff --git a/tests/baselines/reference/exportDefaultProperty2.js b/tests/baselines/reference/exportDefaultProperty2.js
index 5cc9dc47092be..539c215f3b1da 100644
--- a/tests/baselines/reference/exportDefaultProperty2.js
+++ b/tests/baselines/reference/exportDefaultProperty2.js
@@ -20,15 +20,15 @@ const x: B = { c: B };
 //// [a.js]
 "use strict";
 // This test is just like exportEqualsProperty2, but with `export default`.
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
     return C;
 }());
-exports["default"] = C.B;
+exports.default = C.B;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a_1 = require("./a");
-var x = { c: a_1["default"] };
+var x = { c: a_1.default };
diff --git a/tests/baselines/reference/exportEqualCallable.js b/tests/baselines/reference/exportEqualCallable.js
index 830af3a2a3656..b92fff6fcf4df 100644
--- a/tests/baselines/reference/exportEqualCallable.js
+++ b/tests/baselines/reference/exportEqualCallable.js
@@ -21,6 +21,6 @@ define(["require", "exports"], function (require, exports) {
 //// [exportEqualCallable_1.js]
 define(["require", "exports", "exportEqualCallable_0"], function (require, exports, connect) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     connect();
 });
diff --git a/tests/baselines/reference/exportEqualErrorType.js b/tests/baselines/reference/exportEqualErrorType.js
index 4a65ce5fd4908..d94a01d5ee77e 100644
--- a/tests/baselines/reference/exportEqualErrorType.js
+++ b/tests/baselines/reference/exportEqualErrorType.js
@@ -30,6 +30,6 @@ define(["require", "exports"], function (require, exports) {
 //// [exportEqualErrorType_1.js]
 define(["require", "exports", "exportEqualErrorType_0"], function (require, exports, connect) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     connect().use(connect.static('foo')); // Error  1      The property 'static' does not exist on value of type ''.
 });
diff --git a/tests/baselines/reference/exportEqualMemberMissing.js b/tests/baselines/reference/exportEqualMemberMissing.js
index 68ac9485f5f2b..9533cd0fc2329 100644
--- a/tests/baselines/reference/exportEqualMemberMissing.js
+++ b/tests/baselines/reference/exportEqualMemberMissing.js
@@ -27,7 +27,7 @@ var server;
 module.exports = server;
 //// [exportEqualMemberMissing_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='exportEqualMemberMissing_0.ts'/>
 var connect = require("./exportEqualMemberMissing_0");
 connect().use(connect.static('foo')); // Error	1	The property 'static' does not exist on value of type ''.
diff --git a/tests/baselines/reference/exportEqualsDefaultProperty.js b/tests/baselines/reference/exportEqualsDefaultProperty.js
index 3e7fc4d12afc4..0efeedc4b80f6 100644
--- a/tests/baselines/reference/exportEqualsDefaultProperty.js
+++ b/tests/baselines/reference/exportEqualsDefaultProperty.js
@@ -22,6 +22,6 @@ var x = {
 module.exports = x;
 //// [imp.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var exp_1 = require("./exp");
-exp_1["default"].toExponential(2);
+exp_1.default.toExponential(2);
diff --git a/tests/baselines/reference/exportEqualsProperty.js b/tests/baselines/reference/exportEqualsProperty.js
index e6bd09d536743..fb0e852b5e050 100644
--- a/tests/baselines/reference/exportEqualsProperty.js
+++ b/tests/baselines/reference/exportEqualsProperty.js
@@ -60,7 +60,7 @@ module.exports = A.B;
 module.exports = "foo".length;
 //// [index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="declarations.d.ts" />
 var foobar_1 = require("foobar");
 var X2 = require("foobarx");
diff --git a/tests/baselines/reference/exportEqualsProperty2.js b/tests/baselines/reference/exportEqualsProperty2.js
index 5cfcab3e774bb..63d844dc299e6 100644
--- a/tests/baselines/reference/exportEqualsProperty2.js
+++ b/tests/baselines/reference/exportEqualsProperty2.js
@@ -28,6 +28,6 @@ var C = (function () {
 module.exports = C.B;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = require("./a");
 var x = { c: B };
diff --git a/tests/baselines/reference/exportImport.js b/tests/baselines/reference/exportImport.js
index 031dc8974ed46..b3ebf340b2fdc 100644
--- a/tests/baselines/reference/exportImport.js
+++ b/tests/baselines/reference/exportImport.js
@@ -28,13 +28,13 @@ define(["require", "exports"], function (require, exports) {
 //// [exporter.js]
 define(["require", "exports", "./w1"], function (require, exports, w) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.w = w;
 });
 //// [consumer.js]
 define(["require", "exports", "./exporter"], function (require, exports, e) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function w() {
         return new e.w();
     }
diff --git a/tests/baselines/reference/exportImportMultipleFiles.js b/tests/baselines/reference/exportImportMultipleFiles.js
index 31f5f218d6574..e0ae7dd863880 100644
--- a/tests/baselines/reference/exportImportMultipleFiles.js
+++ b/tests/baselines/reference/exportImportMultipleFiles.js
@@ -15,20 +15,20 @@ lib.math.add(3, 4); // Shouldnt be error
 //// [exportImportMultipleFiles_math.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function add(a, b) { return a + b; }
     exports.add = add;
 });
 //// [exportImportMultipleFiles_library.js]
 define(["require", "exports", "exportImportMultipleFiles_math"], function (require, exports, math) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.math = math;
     exports.math.add(3, 4); // OK
 });
 //// [exportImportMultipleFiles_userCode.js]
 define(["require", "exports", "./exportImportMultipleFiles_library"], function (require, exports, lib) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     lib.math.add(3, 4); // Shouldnt be error
 });
diff --git a/tests/baselines/reference/exportImportNonInstantiatedModule2.js b/tests/baselines/reference/exportImportNonInstantiatedModule2.js
index a1217fa485b5e..c31e9e57b0e05 100644
--- a/tests/baselines/reference/exportImportNonInstantiatedModule2.js
+++ b/tests/baselines/reference/exportImportNonInstantiatedModule2.js
@@ -17,17 +17,17 @@ export function w(): e.w { // Should be OK
 //// [w1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [exporter.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [consumer.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function w() {
         return { name: 'value' };
     }
diff --git a/tests/baselines/reference/exportNonInitializedVariablesAMD.js b/tests/baselines/reference/exportNonInitializedVariablesAMD.js
index 62b0e45e3a9c4..847f623b5f4fa 100644
--- a/tests/baselines/reference/exportNonInitializedVariablesAMD.js
+++ b/tests/baselines/reference/exportNonInitializedVariablesAMD.js
@@ -36,7 +36,7 @@ export let h1: D = new D;
 //// [exportNonInitializedVariablesAMD.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var ;
     let;
     var ;
diff --git a/tests/baselines/reference/exportNonInitializedVariablesCommonJS.js b/tests/baselines/reference/exportNonInitializedVariablesCommonJS.js
index 362798c15160c..82edd8316962b 100644
--- a/tests/baselines/reference/exportNonInitializedVariablesCommonJS.js
+++ b/tests/baselines/reference/exportNonInitializedVariablesCommonJS.js
@@ -35,7 +35,7 @@ export let h1: D = new D;
 
 //// [exportNonInitializedVariablesCommonJS.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ;
 let;
 var ;
diff --git a/tests/baselines/reference/exportNonInitializedVariablesUMD.js b/tests/baselines/reference/exportNonInitializedVariablesUMD.js
index cd6ef353fe3d0..ef7c6ffadf06a 100644
--- a/tests/baselines/reference/exportNonInitializedVariablesUMD.js
+++ b/tests/baselines/reference/exportNonInitializedVariablesUMD.js
@@ -44,7 +44,7 @@ export let h1: D = new D;
     }
 })(function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var ;
     let;
     var ;
diff --git a/tests/baselines/reference/exportRedeclarationTypeAliases.js b/tests/baselines/reference/exportRedeclarationTypeAliases.js
index c3e97cf3e106b..0df668b555c32 100644
--- a/tests/baselines/reference/exportRedeclarationTypeAliases.js
+++ b/tests/baselines/reference/exportRedeclarationTypeAliases.js
@@ -5,6 +5,6 @@ export function Foo(): any {}
 
 //// [exportRedeclarationTypeAliases.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function Foo() { }
 exports.Foo = Foo;
diff --git a/tests/baselines/reference/exportSameNameFuncVar.js b/tests/baselines/reference/exportSameNameFuncVar.js
index dc0b24b98c3a3..7085dd92877d5 100644
--- a/tests/baselines/reference/exportSameNameFuncVar.js
+++ b/tests/baselines/reference/exportSameNameFuncVar.js
@@ -6,7 +6,7 @@ export function a() {
 //// [exportSameNameFuncVar.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = 10;
     function a() {
     }
diff --git a/tests/baselines/reference/exportSpecifierForAGlobal.js b/tests/baselines/reference/exportSpecifierForAGlobal.js
index 6023b7c7f14b2..f310fbfb3c452 100644
--- a/tests/baselines/reference/exportSpecifierForAGlobal.js
+++ b/tests/baselines/reference/exportSpecifierForAGlobal.js
@@ -13,7 +13,7 @@ export function f() {
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function f() {
     var x;
     return x;
diff --git a/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration2.js b/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration2.js
index 0a8ebd10ee4ad..bdb0e9e04bf80 100644
--- a/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration2.js
+++ b/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration2.js
@@ -10,4 +10,4 @@ export declare function foo(): X.bar;
 //// [exportSpecifierReferencingOuterDeclaration2_A.js]
 //// [exportSpecifierReferencingOuterDeclaration2_B.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration4.js b/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration4.js
index f0c6dd55984e6..740bb41be73c8 100644
--- a/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration4.js
+++ b/tests/baselines/reference/exportSpecifierReferencingOuterDeclaration4.js
@@ -12,4 +12,4 @@ export declare function bar(): X.bar; // error
 //// [exportSpecifierReferencingOuterDeclaration2_A.js]
 //// [exportSpecifierReferencingOuterDeclaration2_B.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/exportStarForValues.js b/tests/baselines/reference/exportStarForValues.js
index dd8b9c7b4d4d2..ddc55ba0d00ce 100644
--- a/tests/baselines/reference/exportStarForValues.js
+++ b/tests/baselines/reference/exportStarForValues.js
@@ -10,11 +10,11 @@ var x;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x;
 });
diff --git a/tests/baselines/reference/exportStarForValues2.js b/tests/baselines/reference/exportStarForValues2.js
index f10ae1b9936fa..bd7d789e78c29 100644
--- a/tests/baselines/reference/exportStarForValues2.js
+++ b/tests/baselines/reference/exportStarForValues2.js
@@ -14,17 +14,17 @@ var x = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
 //// [file3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
diff --git a/tests/baselines/reference/exportStarForValues3.js b/tests/baselines/reference/exportStarForValues3.js
index 83a818a3e81de..ffbd2bffcd641 100644
--- a/tests/baselines/reference/exportStarForValues3.js
+++ b/tests/baselines/reference/exportStarForValues3.js
@@ -26,29 +26,29 @@ var x = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
 //// [file3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
 //// [file4.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
 //// [file5.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
diff --git a/tests/baselines/reference/exportStarForValues4.js b/tests/baselines/reference/exportStarForValues4.js
index 0a49e982e29ec..e7729b892ef84 100644
--- a/tests/baselines/reference/exportStarForValues4.js
+++ b/tests/baselines/reference/exportStarForValues4.js
@@ -18,17 +18,17 @@ var x = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = 1;
 });
diff --git a/tests/baselines/reference/exportStarForValues5.js b/tests/baselines/reference/exportStarForValues5.js
index 812058ebd06f3..6acfe0b3e5135 100644
--- a/tests/baselines/reference/exportStarForValues5.js
+++ b/tests/baselines/reference/exportStarForValues5.js
@@ -10,10 +10,10 @@ export var x;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/exportStarForValues7.js b/tests/baselines/reference/exportStarForValues7.js
index af213d1308028..9fe8ed92acccc 100644
--- a/tests/baselines/reference/exportStarForValues7.js
+++ b/tests/baselines/reference/exportStarForValues7.js
@@ -14,12 +14,12 @@ export var x = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [file3.js]
@@ -28,7 +28,7 @@ define(["require", "exports", "file2"], function (require, exports, file2_1) {
     function __export(m) {
         for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
     }
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     __export(file2_1);
     exports.x = 1;
 });
diff --git a/tests/baselines/reference/exportStarForValues8.js b/tests/baselines/reference/exportStarForValues8.js
index 7a0045c22cb23..709e6ff128b95 100644
--- a/tests/baselines/reference/exportStarForValues8.js
+++ b/tests/baselines/reference/exportStarForValues8.js
@@ -26,18 +26,18 @@ export var x = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [file3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [file4.js]
@@ -46,7 +46,7 @@ define(["require", "exports", "file2", "file3"], function (require, exports, fil
     function __export(m) {
         for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
     }
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     __export(file2_1);
     __export(file3_1);
     exports.x = 1;
@@ -57,7 +57,7 @@ define(["require", "exports", "file4"], function (require, exports, file4_1) {
     function __export(m) {
         for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
     }
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     __export(file4_1);
     exports.x = 1;
 });
diff --git a/tests/baselines/reference/exportStarForValues9.js b/tests/baselines/reference/exportStarForValues9.js
index 8eb92c05e741f..2d4070356bb1e 100644
--- a/tests/baselines/reference/exportStarForValues9.js
+++ b/tests/baselines/reference/exportStarForValues9.js
@@ -18,7 +18,7 @@ export var x = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file3.js]
 define(["require", "exports", "file2"], function (require, exports, file2_1) {
@@ -26,7 +26,7 @@ define(["require", "exports", "file2"], function (require, exports, file2_1) {
     function __export(m) {
         for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
     }
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     __export(file2_1);
     exports.x = 1;
 });
@@ -36,7 +36,7 @@ define(["require", "exports", "file3"], function (require, exports, file3_1) {
     function __export(m) {
         for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
     }
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     __export(file3_1);
     exports.x = 1;
 });
diff --git a/tests/baselines/reference/exportToString.js b/tests/baselines/reference/exportToString.js
index d527a02741c95..2483e1a44ed0e 100644
--- a/tests/baselines/reference/exportToString.js
+++ b/tests/baselines/reference/exportToString.js
@@ -5,6 +5,6 @@ export { toString };
 
 //// [exportToString.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var toString = 0;
 exports.toString = toString;
diff --git a/tests/baselines/reference/exportVisibility.js b/tests/baselines/reference/exportVisibility.js
index fbb2555d54b75..861cabf7204b2 100644
--- a/tests/baselines/reference/exportVisibility.js
+++ b/tests/baselines/reference/exportVisibility.js
@@ -11,7 +11,7 @@ export function test(foo: Foo) {
 
 //// [exportVisibility.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = (function () {
     function Foo() {
     }
diff --git a/tests/baselines/reference/exportedBlockScopedDeclarations.js b/tests/baselines/reference/exportedBlockScopedDeclarations.js
index 068ac5db23b84..cc20c079d480b 100644
--- a/tests/baselines/reference/exportedBlockScopedDeclarations.js
+++ b/tests/baselines/reference/exportedBlockScopedDeclarations.js
@@ -20,7 +20,7 @@ namespace NS1 {
 //// [exportedBlockScopedDeclarations.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var foo = foo; // compile error
     exports.bar = exports.bar; // should be compile error
     function f() {
diff --git a/tests/baselines/reference/exportedInterfaceInaccessibleInCallbackInModule.js b/tests/baselines/reference/exportedInterfaceInaccessibleInCallbackInModule.js
index 75b9378c3f49f..bbab9a12a9d88 100644
--- a/tests/baselines/reference/exportedInterfaceInaccessibleInCallbackInModule.js
+++ b/tests/baselines/reference/exportedInterfaceInaccessibleInCallbackInModule.js
@@ -15,5 +15,5 @@ export declare class TPromise<V> {
 //// [exportedInterfaceInaccessibleInCallbackInModule.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/exportedVariable1.js b/tests/baselines/reference/exportedVariable1.js
index 80a7fc6a39152..a42db89df0da1 100644
--- a/tests/baselines/reference/exportedVariable1.js
+++ b/tests/baselines/reference/exportedVariable1.js
@@ -6,7 +6,7 @@ var upper = foo.name.toUpperCase();
 //// [exportedVariable1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.foo = { name: "Bill" };
     var upper = exports.foo.name.toUpperCase();
 });
diff --git a/tests/baselines/reference/exportingContainingVisibleType.errors.txt b/tests/baselines/reference/exportingContainingVisibleType.errors.txt
deleted file mode 100644
index 83f722b97dac0..0000000000000
--- a/tests/baselines/reference/exportingContainingVisibleType.errors.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-tests/cases/compiler/exportingContainingVisibleType.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/exportingContainingVisibleType.ts (1 errors) ====
-    class Foo {
-        public get foo() {
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var i: Foo;
-            return i; // Should be fine (previous bug report visibility error).
-     
-        }
-    }
-     
-    export var x = 5;
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/exportingContainingVisibleType.js b/tests/baselines/reference/exportingContainingVisibleType.js
index d50a2a35f0618..a2eae5021e667 100644
--- a/tests/baselines/reference/exportingContainingVisibleType.js
+++ b/tests/baselines/reference/exportingContainingVisibleType.js
@@ -13,7 +13,7 @@ export var x = 5;
 //// [exportingContainingVisibleType.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = (function () {
         function Foo() {
         }
diff --git a/tests/baselines/reference/exportingContainingVisibleType.symbols b/tests/baselines/reference/exportingContainingVisibleType.symbols
new file mode 100644
index 0000000000000..1efc4db110985
--- /dev/null
+++ b/tests/baselines/reference/exportingContainingVisibleType.symbols
@@ -0,0 +1,20 @@
+=== tests/cases/compiler/exportingContainingVisibleType.ts ===
+class Foo {
+>Foo : Symbol(Foo, Decl(exportingContainingVisibleType.ts, 0, 0))
+
+    public get foo() {
+>foo : Symbol(Foo.foo, Decl(exportingContainingVisibleType.ts, 0, 11))
+
+        var i: Foo;
+>i : Symbol(i, Decl(exportingContainingVisibleType.ts, 2, 11))
+>Foo : Symbol(Foo, Decl(exportingContainingVisibleType.ts, 0, 0))
+
+        return i; // Should be fine (previous bug report visibility error).
+>i : Symbol(i, Decl(exportingContainingVisibleType.ts, 2, 11))
+ 
+    }
+}
+ 
+export var x = 5;
+>x : Symbol(x, Decl(exportingContainingVisibleType.ts, 8, 10))
+
diff --git a/tests/baselines/reference/exportingContainingVisibleType.types b/tests/baselines/reference/exportingContainingVisibleType.types
new file mode 100644
index 0000000000000..7f8deda1beb3b
--- /dev/null
+++ b/tests/baselines/reference/exportingContainingVisibleType.types
@@ -0,0 +1,21 @@
+=== tests/cases/compiler/exportingContainingVisibleType.ts ===
+class Foo {
+>Foo : Foo
+
+    public get foo() {
+>foo : Foo
+
+        var i: Foo;
+>i : Foo
+>Foo : Foo
+
+        return i; // Should be fine (previous bug report visibility error).
+>i : Foo
+ 
+    }
+}
+ 
+export var x = 5;
+>x : number
+>5 : 5
+
diff --git a/tests/baselines/reference/exportsAndImports1.js b/tests/baselines/reference/exportsAndImports1.js
index 30fef6e7ccfdf..5de13d2a8ddcd 100644
--- a/tests/baselines/reference/exportsAndImports1.js
+++ b/tests/baselines/reference/exportsAndImports1.js
@@ -35,7 +35,7 @@ export { v, f, C, I, E, D, M, N, T, a };
 
 //// [t1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var v = 1;
 exports.v = v;
 function f() { }
@@ -61,7 +61,7 @@ var a = M.x;
 exports.a = a;
 //// [t2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.v = t1_1.v;
 exports.f = t1_1.f;
@@ -71,7 +71,7 @@ exports.M = t1_1.M;
 exports.a = t1_1.a;
 //// [t3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.v = t1_1.v;
 exports.f = t1_1.f;
diff --git a/tests/baselines/reference/exportsAndImports2.js b/tests/baselines/reference/exportsAndImports2.js
index d905ab3827fc5..0b719e9ce7eac 100644
--- a/tests/baselines/reference/exportsAndImports2.js
+++ b/tests/baselines/reference/exportsAndImports2.js
@@ -14,18 +14,18 @@ export { x as y, y as x };
 
 //// [t1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = "x";
 exports.y = "y";
 //// [t2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.y = t1_1.x;
 exports.x = t1_1.y;
 //// [t3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.y = t1_1.x;
 exports.x = t1_1.y;
diff --git a/tests/baselines/reference/exportsAndImports3.js b/tests/baselines/reference/exportsAndImports3.js
index 77ac28f4800e6..d36a75fb9512f 100644
--- a/tests/baselines/reference/exportsAndImports3.js
+++ b/tests/baselines/reference/exportsAndImports3.js
@@ -35,7 +35,7 @@ export { v, f, C, I, E, D, M, N, T, a };
 
 //// [t1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.v = 1;
 exports.v1 = exports.v;
 function f() { }
@@ -63,7 +63,7 @@ exports.a = M.x;
 exports.a1 = exports.a;
 //// [t2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.v = t1_1.v1;
 exports.f = t1_1.f1;
@@ -73,7 +73,7 @@ exports.M = t1_1.M1;
 exports.a = t1_1.a1;
 //// [t3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.v = t1_1.v1;
 exports.f = t1_1.f1;
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores1.js b/tests/baselines/reference/exportsAndImportsWithUnderscores1.js
index 284537252fe70..4a79981889d1f 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores1.js
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores1.js
@@ -15,15 +15,15 @@ const { __, _, ___ } = R;
 
 //// [m1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var R;
-exports["default"] = R = {
+exports.default = R = {
     "__": 20,
     "_": 10,
     "___": 30
 };
 //// [m2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1_1 = require("./m1");
-var __ = m1_1["default"].__, _ = m1_1["default"]._, ___ = m1_1["default"].___;
+var __ = m1_1.default.__, _ = m1_1.default._, ___ = m1_1.default.___;
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores2.js b/tests/baselines/reference/exportsAndImportsWithUnderscores2.js
index 90cbc11b95b10..4d4f0e53c1679 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores2.js
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores2.js
@@ -14,14 +14,14 @@ const { __esmodule, __proto__ } = R;
 
 //// [m1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var R;
-exports["default"] = R = {
+exports.default = R = {
     "__esmodule": true,
     "__proto__": {}
 };
 //// [m2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1_1 = require("./m1");
-var __esmodule = m1_1["default"].__esmodule, __proto__ = m1_1["default"].__proto__;
+var __esmodule = m1_1.default.__esmodule, __proto__ = m1_1.default.__proto__;
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores3.js b/tests/baselines/reference/exportsAndImportsWithUnderscores3.js
index 0aead5f1f8bbc..2e1be100341ab 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores3.js
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores3.js
@@ -15,15 +15,15 @@ const { ___, ___hello, _hi } = R;
 
 //// [m1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var R;
-exports["default"] = R = {
+exports.default = R = {
     "___": 30,
     "___hello": 21,
     "_hi": 40
 };
 //// [m2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1_1 = require("./m1");
-var ___ = m1_1["default"].___, ___hello = m1_1["default"].___hello, _hi = m1_1["default"]._hi;
+var ___ = m1_1.default.___, ___hello = m1_1.default.___hello, _hi = m1_1.default._hi;
diff --git a/tests/baselines/reference/exportsAndImportsWithUnderscores4.js b/tests/baselines/reference/exportsAndImportsWithUnderscores4.js
index ad50ca41efff8..c6d981ce4e70c 100644
--- a/tests/baselines/reference/exportsAndImportsWithUnderscores4.js
+++ b/tests/baselines/reference/exportsAndImportsWithUnderscores4.js
@@ -35,7 +35,7 @@ _hi();
 
 //// [m1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function _() {
     console.log("_");
 }
@@ -66,7 +66,7 @@ function ___hello() {
 exports.___hello = ___hello;
 //// [m2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1_1 = require("./m1");
 m1_1._();
 m1_1.__();
diff --git a/tests/baselines/reference/extendClassExpressionFromModule.js b/tests/baselines/reference/extendClassExpressionFromModule.js
index 28c9488f7fa35..e0707e839af8d 100644
--- a/tests/baselines/reference/extendClassExpressionFromModule.js
+++ b/tests/baselines/reference/extendClassExpressionFromModule.js
@@ -31,7 +31,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo1 = require("./foo1");
 var x = foo1;
 var y = (function (_super) {
diff --git a/tests/baselines/reference/extendingClassFromAliasAndUsageInIndexer.js b/tests/baselines/reference/extendingClassFromAliasAndUsageInIndexer.js
index c8f7719faf026..c196308898855 100644
--- a/tests/baselines/reference/extendingClassFromAliasAndUsageInIndexer.js
+++ b/tests/baselines/reference/extendingClassFromAliasAndUsageInIndexer.js
@@ -34,7 +34,7 @@ var visModel = new moduleMap[moduleName].VisualizationModel();
 
 //// [extendingClassFromAliasAndUsageInIndexer_backbone.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Model = (function () {
     function Model() {
     }
@@ -53,7 +53,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./extendingClassFromAliasAndUsageInIndexer_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -75,7 +75,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Backbone = require("./extendingClassFromAliasAndUsageInIndexer_backbone");
 var VisualizationModel = (function (_super) {
     __extends(VisualizationModel, _super);
@@ -87,7 +87,7 @@ var VisualizationModel = (function (_super) {
 exports.VisualizationModel = VisualizationModel;
 //// [extendingClassFromAliasAndUsageInIndexer_main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var moduleA = require("./extendingClassFromAliasAndUsageInIndexer_moduleA");
 var moduleB = require("./extendingClassFromAliasAndUsageInIndexer_moduleB");
 var moduleATyped = moduleA;
diff --git a/tests/baselines/reference/extendsUntypedModule.js b/tests/baselines/reference/extendsUntypedModule.js
index 5ccd7babe9890..92a4378e4f0d5 100644
--- a/tests/baselines/reference/extendsUntypedModule.js
+++ b/tests/baselines/reference/extendsUntypedModule.js
@@ -26,7 +26,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo_1 = require("foo");
 var A = (function (_super) {
     __extends(A, _super);
@@ -34,5 +34,5 @@ var A = (function (_super) {
         return _super !== null && _super.apply(this, arguments) || this;
     }
     return A;
-}(foo_1["default"]));
+}(foo_1.default));
 exports.A = A;
diff --git a/tests/baselines/reference/externalModuleAssignToVar.js b/tests/baselines/reference/externalModuleAssignToVar.js
index 70ce2281ad3d6..3c572cbf2c749 100644
--- a/tests/baselines/reference/externalModuleAssignToVar.js
+++ b/tests/baselines/reference/externalModuleAssignToVar.js
@@ -29,7 +29,7 @@ y3 = ext3; // ok
 //// [externalModuleAssignToVar_core_require.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C = (function () {
         function C() {
         }
@@ -60,7 +60,7 @@ define(["require", "exports"], function (require, exports) {
 //// [externalModuleAssignToVar_core.js]
 define(["require", "exports", "externalModuleAssignToVar_core_require", "externalModuleAssignToVar_core_require2", "externalModuleAssignToVar_ext"], function (require, exports, ext, ext2, ext3) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var y1 = ext;
     y1 = ext; // ok
     var y2 = ext2;
diff --git a/tests/baselines/reference/externalModuleExportingGenericClass.js b/tests/baselines/reference/externalModuleExportingGenericClass.js
index 339eaec2cbfa7..a6184be36e710 100644
--- a/tests/baselines/reference/externalModuleExportingGenericClass.js
+++ b/tests/baselines/reference/externalModuleExportingGenericClass.js
@@ -24,7 +24,7 @@ var C = (function () {
 module.exports = C;
 //// [externalModuleExportingGenericClass_file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a = require("./externalModuleExportingGenericClass_file0");
 var v; // this should report error
 var v2 = (new a()).foo;
diff --git a/tests/baselines/reference/externalModuleImmutableBindings.js b/tests/baselines/reference/externalModuleImmutableBindings.js
index d6f5913f5d1d3..dc956d995f1ff 100644
--- a/tests/baselines/reference/externalModuleImmutableBindings.js
+++ b/tests/baselines/reference/externalModuleImmutableBindings.js
@@ -52,11 +52,11 @@ for ((stuff[n]) of []) {}
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // all mutations below are illegal and should be fixed
 var stuff = require("./f1");
 var n = 'baz';
diff --git a/tests/baselines/reference/externalModuleQualification.js b/tests/baselines/reference/externalModuleQualification.js
index 0402847a13a93..3edb01ff94eb6 100644
--- a/tests/baselines/reference/externalModuleQualification.js
+++ b/tests/baselines/reference/externalModuleQualification.js
@@ -13,7 +13,7 @@ class NavigateAction {
 
 //// [externalModuleQualification.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.ID = "test";
 var DiffEditor = (function () {
     function DiffEditor(id) {
diff --git a/tests/baselines/reference/externalModuleReferenceOfImportDeclarationWithExportModifier.js b/tests/baselines/reference/externalModuleReferenceOfImportDeclarationWithExportModifier.js
index e5a854077c5b1..1bbb7985c1f89 100644
--- a/tests/baselines/reference/externalModuleReferenceOfImportDeclarationWithExportModifier.js
+++ b/tests/baselines/reference/externalModuleReferenceOfImportDeclarationWithExportModifier.js
@@ -11,7 +11,7 @@ file1.foo();
 //// [externalModuleReferenceOfImportDeclarationWithExportModifier_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo() { }
     exports.foo = foo;
     ;
@@ -19,7 +19,7 @@ define(["require", "exports"], function (require, exports) {
 //// [externalModuleReferenceOfImportDeclarationWithExportModifier_1.js]
 define(["require", "exports", "externalModuleReferenceOfImportDeclarationWithExportModifier_0"], function (require, exports, file1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.file1 = file1;
     exports.file1.foo();
 });
diff --git a/tests/baselines/reference/externalModuleRefernceResolutionOrderInImportDeclaration.js b/tests/baselines/reference/externalModuleRefernceResolutionOrderInImportDeclaration.js
index 3a930d8e03a41..440e33677b305 100644
--- a/tests/baselines/reference/externalModuleRefernceResolutionOrderInImportDeclaration.js
+++ b/tests/baselines/reference/externalModuleRefernceResolutionOrderInImportDeclaration.js
@@ -20,13 +20,13 @@ file1.bar();
 //// [externalModuleRefernceResolutionOrderInImportDeclaration_file2.js]
 //// [externalModuleRefernceResolutionOrderInImportDeclaration_file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() { }
 exports.foo = foo;
 ;
 //// [externalModuleRefernceResolutionOrderInImportDeclaration_file3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='externalModuleRefernceResolutionOrderInImportDeclaration_file2.ts'/>
 var file1 = require("./externalModuleRefernceResolutionOrderInImportDeclaration_file1");
 file1.foo();
diff --git a/tests/baselines/reference/externalModuleResolution.js b/tests/baselines/reference/externalModuleResolution.js
index 1ef5be538831e..1e437ea1eb0a0 100644
--- a/tests/baselines/reference/externalModuleResolution.js
+++ b/tests/baselines/reference/externalModuleResolution.js
@@ -25,6 +25,6 @@ var M2;
 module.exports = M2;
 //// [consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = require("./foo");
 x.Y; // .ts should be picked
diff --git a/tests/baselines/reference/externalModuleResolution2.js b/tests/baselines/reference/externalModuleResolution2.js
index 2c3c9facff18c..eb6b81a2ad27c 100644
--- a/tests/baselines/reference/externalModuleResolution2.js
+++ b/tests/baselines/reference/externalModuleResolution2.js
@@ -26,6 +26,6 @@ var M2;
 module.exports = M2;
 //// [consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = require("./foo");
 x.X; // .ts should be picked
diff --git a/tests/baselines/reference/externalModuleWithoutCompilerFlag1.js b/tests/baselines/reference/externalModuleWithoutCompilerFlag1.js
index 972b4b3b2eab2..b50d4f1e49ed9 100644
--- a/tests/baselines/reference/externalModuleWithoutCompilerFlag1.js
+++ b/tests/baselines/reference/externalModuleWithoutCompilerFlag1.js
@@ -5,4 +5,4 @@
 
 //// [externalModuleWithoutCompilerFlag1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/fatarrowfunctionsErrors.js b/tests/baselines/reference/fatarrowfunctionsErrors.js
index 0f318f1aa84ad..a3e848e90921c 100644
--- a/tests/baselines/reference/fatarrowfunctionsErrors.js
+++ b/tests/baselines/reference/fatarrowfunctionsErrors.js
@@ -20,7 +20,7 @@ foo(function () {
     }
     return 0;
 });
-foo((1), { "return": 0 });
+foo((1), { return: 0 });
 foo(function (x) { return x; });
 foo(function (x) {
     if (x === void 0) { x = 0; }
diff --git a/tests/baselines/reference/fieldAndGetterWithSameName.errors.txt b/tests/baselines/reference/fieldAndGetterWithSameName.errors.txt
index e78ccce2b8378..4c8fa1a492f55 100644
--- a/tests/baselines/reference/fieldAndGetterWithSameName.errors.txt
+++ b/tests/baselines/reference/fieldAndGetterWithSameName.errors.txt
@@ -1,16 +1,13 @@
 tests/cases/compiler/fieldAndGetterWithSameName.ts(2,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/compiler/fieldAndGetterWithSameName.ts(3,7): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/fieldAndGetterWithSameName.ts(3,7): error TS2300: Duplicate identifier 'x'.
 
 
-==== tests/cases/compiler/fieldAndGetterWithSameName.ts (3 errors) ====
+==== tests/cases/compiler/fieldAndGetterWithSameName.ts (2 errors) ====
     export class C {
         x: number;
         ~
 !!! error TS2300: Duplicate identifier 'x'.
       get x(): number { return 1; }
           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-          ~
 !!! error TS2300: Duplicate identifier 'x'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/fieldAndGetterWithSameName.js b/tests/baselines/reference/fieldAndGetterWithSameName.js
index 673a0372f054d..78f55c6d9af54 100644
--- a/tests/baselines/reference/fieldAndGetterWithSameName.js
+++ b/tests/baselines/reference/fieldAndGetterWithSameName.js
@@ -7,7 +7,7 @@ export class C {
 //// [fieldAndGetterWithSameName.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C = (function () {
         function C() {
         }
diff --git a/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.js b/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.js
index 9b48439ad5608..64822d46a2dc8 100644
--- a/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.js
+++ b/tests/baselines/reference/filesEmittingIntoSameOutputWithOutOption.js
@@ -12,7 +12,7 @@ function foo() {
 //// [a.js]
 define("a", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c = (function () {
         function c() {
         }
diff --git a/tests/baselines/reference/functionAndImportNameConflict.js b/tests/baselines/reference/functionAndImportNameConflict.js
index 2bc6d91b2c3e6..3961491b32b84 100644
--- a/tests/baselines/reference/functionAndImportNameConflict.js
+++ b/tests/baselines/reference/functionAndImportNameConflict.js
@@ -11,13 +11,13 @@ export function f() {
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function f() {
 }
 exports.f = f;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function f() {
 }
 exports.f = f;
diff --git a/tests/baselines/reference/functionAndPropertyNameConflict.errors.txt b/tests/baselines/reference/functionAndPropertyNameConflict.errors.txt
index a976048d0e3a4..efaf84b6d0a3e 100644
--- a/tests/baselines/reference/functionAndPropertyNameConflict.errors.txt
+++ b/tests/baselines/reference/functionAndPropertyNameConflict.errors.txt
@@ -1,17 +1,14 @@
 tests/cases/compiler/functionAndPropertyNameConflict.ts(2,12): error TS2300: Duplicate identifier 'aaaaa'.
-tests/cases/compiler/functionAndPropertyNameConflict.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/functionAndPropertyNameConflict.ts(3,16): error TS2300: Duplicate identifier 'aaaaa'.
 
 
-==== tests/cases/compiler/functionAndPropertyNameConflict.ts (3 errors) ====
+==== tests/cases/compiler/functionAndPropertyNameConflict.ts (2 errors) ====
     class C65 {
         public aaaaa() { }
                ~~~~~
 !!! error TS2300: Duplicate identifier 'aaaaa'.
         public get aaaaa() {
                    ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~~~
 !!! error TS2300: Duplicate identifier 'aaaaa'.
             return 1;
         }
diff --git a/tests/baselines/reference/functionLikeInParameterInitializer.js b/tests/baselines/reference/functionLikeInParameterInitializer.js
index 9bf71aff1eab7..2920245ea67e0 100644
--- a/tests/baselines/reference/functionLikeInParameterInitializer.js
+++ b/tests/baselines/reference/functionLikeInParameterInitializer.js
@@ -21,7 +21,7 @@ export function baz3(func = class { x = foo }) {
 
 //// [functionLikeInParameterInitializer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // error
 function bar(func) {
     if (func === void 0) { func = function () { return foo; }; }
diff --git a/tests/baselines/reference/genericArrayExtenstions.js b/tests/baselines/reference/genericArrayExtenstions.js
index 87a7fba25c114..df0e287c7d2f0 100644
--- a/tests/baselines/reference/genericArrayExtenstions.js
+++ b/tests/baselines/reference/genericArrayExtenstions.js
@@ -7,4 +7,4 @@ concat(...items: T[]): T[];
 
 //// [genericArrayExtenstions.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/genericClassesInModule2.js b/tests/baselines/reference/genericClassesInModule2.js
index 738fa996cf785..4f9f4c40a5931 100644
--- a/tests/baselines/reference/genericClassesInModule2.js
+++ b/tests/baselines/reference/genericClassesInModule2.js
@@ -23,7 +23,7 @@ export class B<T2> {
 //// [genericClassesInModule2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A(callback) {
             this.callback = callback;
diff --git a/tests/baselines/reference/genericGetter.errors.txt b/tests/baselines/reference/genericGetter.errors.txt
index 3a8edb602e0ff..4cdaf754fd2fc 100644
--- a/tests/baselines/reference/genericGetter.errors.txt
+++ b/tests/baselines/reference/genericGetter.errors.txt
@@ -1,13 +1,10 @@
-tests/cases/compiler/genericGetter.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/genericGetter.ts(9,5): error TS2322: Type 'number' is not assignable to type 'string'.
 
 
-==== tests/cases/compiler/genericGetter.ts (2 errors) ====
+==== tests/cases/compiler/genericGetter.ts (1 errors) ====
     class C<T> {
         data: T;
         get x(): T {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return this.data;
         }
     }
diff --git a/tests/baselines/reference/genericGetter2.errors.txt b/tests/baselines/reference/genericGetter2.errors.txt
index 586ae56f60628..eff53006b9c62 100644
--- a/tests/baselines/reference/genericGetter2.errors.txt
+++ b/tests/baselines/reference/genericGetter2.errors.txt
@@ -1,15 +1,12 @@
-tests/cases/compiler/genericGetter2.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/genericGetter2.ts(5,14): error TS2314: Generic type 'A<T>' requires 1 type argument(s).
 
 
-==== tests/cases/compiler/genericGetter2.ts (2 errors) ====
+==== tests/cases/compiler/genericGetter2.ts (1 errors) ====
     class A<T> { }
     
     class C<T> {
         data: A<T>;
         get x(): A {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                  ~
 !!! error TS2314: Generic type 'A<T>' requires 1 type argument(s).
             return this.data;
diff --git a/tests/baselines/reference/genericGetter3.errors.txt b/tests/baselines/reference/genericGetter3.errors.txt
index 24b44af28eea1..c67dd40f10e78 100644
--- a/tests/baselines/reference/genericGetter3.errors.txt
+++ b/tests/baselines/reference/genericGetter3.errors.txt
@@ -1,15 +1,12 @@
-tests/cases/compiler/genericGetter3.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/genericGetter3.ts(11,5): error TS2322: Type 'A<number>' is not assignable to type 'string'.
 
 
-==== tests/cases/compiler/genericGetter3.ts (2 errors) ====
+==== tests/cases/compiler/genericGetter3.ts (1 errors) ====
     class A<T> { }
     
     class C<T> {
         data: A<T>;
         get x(): A<T> {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return this.data;
         }
     }
diff --git a/tests/baselines/reference/genericInterfaceFunctionTypeParameter.js b/tests/baselines/reference/genericInterfaceFunctionTypeParameter.js
index 83b100f48370d..9afb89f3797ed 100644
--- a/tests/baselines/reference/genericInterfaceFunctionTypeParameter.js
+++ b/tests/baselines/reference/genericInterfaceFunctionTypeParameter.js
@@ -10,7 +10,7 @@ export function foo<A>(fn: (ifoo: IFoo<A>) => void) {
 //// [genericInterfaceFunctionTypeParameter.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo(fn) {
         foo(fn); // Invocation is necessary to repro (!)
     }
diff --git a/tests/baselines/reference/genericMemberFunction.js b/tests/baselines/reference/genericMemberFunction.js
index 61a9298eb7f85..1e8cba6498f3e 100644
--- a/tests/baselines/reference/genericMemberFunction.js
+++ b/tests/baselines/reference/genericMemberFunction.js
@@ -25,7 +25,7 @@ export class BuildResult<A, B, C>{
 //// [genericMemberFunction.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var BuildError = (function () {
         function BuildError() {
         }
diff --git a/tests/baselines/reference/genericRecursiveImplicitConstructorErrors1.js b/tests/baselines/reference/genericRecursiveImplicitConstructorErrors1.js
index 49debc2ca8450..3b5595bb91e73 100644
--- a/tests/baselines/reference/genericRecursiveImplicitConstructorErrors1.js
+++ b/tests/baselines/reference/genericRecursiveImplicitConstructorErrors1.js
@@ -16,5 +16,5 @@ export declare module TypeScript {
 //// [genericRecursiveImplicitConstructorErrors1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/genericReturnTypeFromGetter1.errors.txt b/tests/baselines/reference/genericReturnTypeFromGetter1.errors.txt
index 6f5f68064a6a6..2e39ce620c118 100644
--- a/tests/baselines/reference/genericReturnTypeFromGetter1.errors.txt
+++ b/tests/baselines/reference/genericReturnTypeFromGetter1.errors.txt
@@ -1,8 +1,7 @@
 tests/cases/compiler/genericReturnTypeFromGetter1.ts(5,18): error TS2314: Generic type 'A<T>' requires 1 type argument(s).
-tests/cases/compiler/genericReturnTypeFromGetter1.ts(6,7): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/genericReturnTypeFromGetter1.ts (2 errors) ====
+==== tests/cases/compiler/genericReturnTypeFromGetter1.ts (1 errors) ====
     export interface A<T> {
        new (dbSet: DbSet<T>): T;
     }
@@ -11,7 +10,5 @@ tests/cases/compiler/genericReturnTypeFromGetter1.ts(6,7): error TS1056: Accesso
                      ~
 !!! error TS2314: Generic type 'A<T>' requires 1 type argument(s).
       get entityType() { return this._entityType; }  // used to ICE without return type annotation
-          ~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/genericReturnTypeFromGetter1.js b/tests/baselines/reference/genericReturnTypeFromGetter1.js
index 728d81dd147bc..8c75065a8c147 100644
--- a/tests/baselines/reference/genericReturnTypeFromGetter1.js
+++ b/tests/baselines/reference/genericReturnTypeFromGetter1.js
@@ -11,7 +11,7 @@ export class DbSet<T> {
 //// [genericReturnTypeFromGetter1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var DbSet = (function () {
         function DbSet() {
         }
diff --git a/tests/baselines/reference/genericTypeWithMultipleBases1.js b/tests/baselines/reference/genericTypeWithMultipleBases1.js
index a958516dfa034..6ef71ea6c6728 100644
--- a/tests/baselines/reference/genericTypeWithMultipleBases1.js
+++ b/tests/baselines/reference/genericTypeWithMultipleBases1.js
@@ -21,7 +21,7 @@ x.m2();
 
 //// [genericTypeWithMultipleBases1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 x.p1;
 x.m1();
diff --git a/tests/baselines/reference/genericTypeWithMultipleBases2.js b/tests/baselines/reference/genericTypeWithMultipleBases2.js
index 43651ec8278ae..98f40c142671b 100644
--- a/tests/baselines/reference/genericTypeWithMultipleBases2.js
+++ b/tests/baselines/reference/genericTypeWithMultipleBases2.js
@@ -21,7 +21,7 @@ x.m2();
 //// [genericTypeWithMultipleBases2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x;
     x.p1;
     x.m1();
diff --git a/tests/baselines/reference/genericWithIndexerOfTypeParameterType2.js b/tests/baselines/reference/genericWithIndexerOfTypeParameterType2.js
index 3f5e3dcfe8e6e..3048cfd537445 100644
--- a/tests/baselines/reference/genericWithIndexerOfTypeParameterType2.js
+++ b/tests/baselines/reference/genericWithIndexerOfTypeParameterType2.js
@@ -27,7 +27,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Collection = (function () {
         function Collection() {
         }
diff --git a/tests/baselines/reference/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.errors.txt b/tests/baselines/reference/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.errors.txt
index c25aca342caa5..a346e58db749a 100644
--- a/tests/baselines/reference/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.errors.txt
+++ b/tests/baselines/reference/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.errors.txt
@@ -4,10 +4,9 @@ tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts(2,
 tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts(2,34): error TS2304: Cannot find name '_'.
 tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts(4,16): error TS2300: Duplicate identifier '_'.
 tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts(15,15): error TS2300: Duplicate identifier '_'.
-tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts(21,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts (7 errors) ====
+==== tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts (6 errors) ====
     declare function _<T>(value: Array<T>): _<T>;
                      ~
 !!! error TS2300: Duplicate identifier '_'.
@@ -41,8 +40,6 @@ tests/cases/compiler/getAccessorWithImpliedReturnTypeAndFunctionClassMerge.ts(21
     module MyModule { 
         export class MyClass {
             public get myGetter() {
-                       ~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                 var obj:any = {};
                 
                 return obj;
diff --git a/tests/baselines/reference/getAndSetAsMemberNames.errors.txt b/tests/baselines/reference/getAndSetAsMemberNames.errors.txt
deleted file mode 100644
index a83c4ba118c3a..0000000000000
--- a/tests/baselines/reference/getAndSetAsMemberNames.errors.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-tests/cases/compiler/getAndSetAsMemberNames.ts(19,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/getAndSetAsMemberNames.ts (1 errors) ====
-    class C1 {
-        set: boolean;
-        get = 1;
-    }
-    class C2 {
-        set;
-    }
-    class C3 {
-        set (x) {
-            return x + 1;
-        }
-    }
-    class C4 {
-        get: boolean = true;
-    }
-    class C5 {
-        public set: () => boolean = function () { return true; };
-        get (): boolean { return true; }
-        set t(x) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/getAndSetAsMemberNames.symbols b/tests/baselines/reference/getAndSetAsMemberNames.symbols
new file mode 100644
index 0000000000000..b5f6f74e1cfde
--- /dev/null
+++ b/tests/baselines/reference/getAndSetAsMemberNames.symbols
@@ -0,0 +1,47 @@
+=== tests/cases/compiler/getAndSetAsMemberNames.ts ===
+class C1 {
+>C1 : Symbol(C1, Decl(getAndSetAsMemberNames.ts, 0, 0))
+
+    set: boolean;
+>set : Symbol(C1.set, Decl(getAndSetAsMemberNames.ts, 0, 10))
+
+    get = 1;
+>get : Symbol(C1.get, Decl(getAndSetAsMemberNames.ts, 1, 17))
+}
+class C2 {
+>C2 : Symbol(C2, Decl(getAndSetAsMemberNames.ts, 3, 1))
+
+    set;
+>set : Symbol(C2.set, Decl(getAndSetAsMemberNames.ts, 4, 10))
+}
+class C3 {
+>C3 : Symbol(C3, Decl(getAndSetAsMemberNames.ts, 6, 1))
+
+    set (x) {
+>set : Symbol(C3.set, Decl(getAndSetAsMemberNames.ts, 7, 10))
+>x : Symbol(x, Decl(getAndSetAsMemberNames.ts, 8, 9))
+
+        return x + 1;
+>x : Symbol(x, Decl(getAndSetAsMemberNames.ts, 8, 9))
+    }
+}
+class C4 {
+>C4 : Symbol(C4, Decl(getAndSetAsMemberNames.ts, 11, 1))
+
+    get: boolean = true;
+>get : Symbol(C4.get, Decl(getAndSetAsMemberNames.ts, 12, 10))
+}
+class C5 {
+>C5 : Symbol(C5, Decl(getAndSetAsMemberNames.ts, 14, 1))
+
+    public set: () => boolean = function () { return true; };
+>set : Symbol(C5.set, Decl(getAndSetAsMemberNames.ts, 15, 10))
+
+    get (): boolean { return true; }
+>get : Symbol(C5.get, Decl(getAndSetAsMemberNames.ts, 16, 61))
+
+    set t(x) { }
+>t : Symbol(C5.t, Decl(getAndSetAsMemberNames.ts, 17, 36))
+>x : Symbol(x, Decl(getAndSetAsMemberNames.ts, 18, 10))
+}
+
diff --git a/tests/baselines/reference/getAndSetAsMemberNames.types b/tests/baselines/reference/getAndSetAsMemberNames.types
new file mode 100644
index 0000000000000..00c3db97b8ce9
--- /dev/null
+++ b/tests/baselines/reference/getAndSetAsMemberNames.types
@@ -0,0 +1,54 @@
+=== tests/cases/compiler/getAndSetAsMemberNames.ts ===
+class C1 {
+>C1 : C1
+
+    set: boolean;
+>set : boolean
+
+    get = 1;
+>get : number
+>1 : 1
+}
+class C2 {
+>C2 : C2
+
+    set;
+>set : any
+}
+class C3 {
+>C3 : C3
+
+    set (x) {
+>set : (x: any) => any
+>x : any
+
+        return x + 1;
+>x + 1 : any
+>x : any
+>1 : 1
+    }
+}
+class C4 {
+>C4 : C4
+
+    get: boolean = true;
+>get : boolean
+>true : true
+}
+class C5 {
+>C5 : C5
+
+    public set: () => boolean = function () { return true; };
+>set : () => boolean
+>function () { return true; } : () => true
+>true : true
+
+    get (): boolean { return true; }
+>get : () => boolean
+>true : true
+
+    set t(x) { }
+>t : any
+>x : any
+}
+
diff --git a/tests/baselines/reference/getAndSetNotIdenticalType.errors.txt b/tests/baselines/reference/getAndSetNotIdenticalType.errors.txt
index a16cbfe7b37a5..2b54929e850c1 100644
--- a/tests/baselines/reference/getAndSetNotIdenticalType.errors.txt
+++ b/tests/baselines/reference/getAndSetNotIdenticalType.errors.txt
@@ -1,21 +1,15 @@
-tests/cases/compiler/getAndSetNotIdenticalType.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/getAndSetNotIdenticalType.ts(2,9): error TS2380: 'get' and 'set' accessor must have the same type.
-tests/cases/compiler/getAndSetNotIdenticalType.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/getAndSetNotIdenticalType.ts(5,9): error TS2380: 'get' and 'set' accessor must have the same type.
 
 
-==== tests/cases/compiler/getAndSetNotIdenticalType.ts (4 errors) ====
+==== tests/cases/compiler/getAndSetNotIdenticalType.ts (2 errors) ====
     class C {
         get x(): number {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2380: 'get' and 'set' accessor must have the same type.
             return 1;
         }
         set x(v: string) { }
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2380: 'get' and 'set' accessor must have the same type.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/getAndSetNotIdenticalType2.errors.txt b/tests/baselines/reference/getAndSetNotIdenticalType2.errors.txt
index c9fae8cc89c4a..354f86d1c843d 100644
--- a/tests/baselines/reference/getAndSetNotIdenticalType2.errors.txt
+++ b/tests/baselines/reference/getAndSetNotIdenticalType2.errors.txt
@@ -1,27 +1,21 @@
-tests/cases/compiler/getAndSetNotIdenticalType2.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/getAndSetNotIdenticalType2.ts(5,9): error TS2380: 'get' and 'set' accessor must have the same type.
-tests/cases/compiler/getAndSetNotIdenticalType2.ts(8,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/getAndSetNotIdenticalType2.ts(8,9): error TS2380: 'get' and 'set' accessor must have the same type.
 tests/cases/compiler/getAndSetNotIdenticalType2.ts(9,9): error TS2322: Type 'A<string>' is not assignable to type 'A<T>'.
   Type 'string' is not assignable to type 'T'.
 
 
-==== tests/cases/compiler/getAndSetNotIdenticalType2.ts (5 errors) ====
+==== tests/cases/compiler/getAndSetNotIdenticalType2.ts (3 errors) ====
     class A<T> { foo: T; }
     
     class C<T> {
         data: A<T>;
         get x(): A<T> {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2380: 'get' and 'set' accessor must have the same type.
             return this.data;
         }
         set x(v: A<string>) {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2380: 'get' and 'set' accessor must have the same type.
             this.data = v;
             ~~~~~~~~~
diff --git a/tests/baselines/reference/getAndSetNotIdenticalType3.errors.txt b/tests/baselines/reference/getAndSetNotIdenticalType3.errors.txt
index 3fb17d65a400b..6618e0e4cc72e 100644
--- a/tests/baselines/reference/getAndSetNotIdenticalType3.errors.txt
+++ b/tests/baselines/reference/getAndSetNotIdenticalType3.errors.txt
@@ -1,27 +1,21 @@
-tests/cases/compiler/getAndSetNotIdenticalType3.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/getAndSetNotIdenticalType3.ts(5,9): error TS2380: 'get' and 'set' accessor must have the same type.
-tests/cases/compiler/getAndSetNotIdenticalType3.ts(8,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/getAndSetNotIdenticalType3.ts(8,9): error TS2380: 'get' and 'set' accessor must have the same type.
 tests/cases/compiler/getAndSetNotIdenticalType3.ts(9,9): error TS2322: Type 'A<string>' is not assignable to type 'A<number>'.
   Type 'string' is not assignable to type 'number'.
 
 
-==== tests/cases/compiler/getAndSetNotIdenticalType3.ts (5 errors) ====
+==== tests/cases/compiler/getAndSetNotIdenticalType3.ts (3 errors) ====
     class A<T> { foo: T; }
     
     class C<T> {
         data: A<number>;
         get x(): A<number> {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2380: 'get' and 'set' accessor must have the same type.
             return this.data;
         }
         set x(v: A<string>) {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2380: 'get' and 'set' accessor must have the same type.
             this.data = v;
             ~~~~~~~~~
diff --git a/tests/baselines/reference/getsetReturnTypes.errors.txt b/tests/baselines/reference/getsetReturnTypes.errors.txt
deleted file mode 100644
index 2a69548c7aa7f..0000000000000
--- a/tests/baselines/reference/getsetReturnTypes.errors.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-tests/cases/compiler/getsetReturnTypes.ts(3,7): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/getsetReturnTypes.ts (1 errors) ====
-    function makePoint(x: number) { 
-     return { 
-      get x() { return x; } 
-          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-     } 
-    }; 
-    var x = makePoint(2).x;
-    var y: number = makePoint(2).x;
\ No newline at end of file
diff --git a/tests/baselines/reference/getsetReturnTypes.symbols b/tests/baselines/reference/getsetReturnTypes.symbols
new file mode 100644
index 0000000000000..1a6e3d2dfac93
--- /dev/null
+++ b/tests/baselines/reference/getsetReturnTypes.symbols
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/getsetReturnTypes.ts ===
+function makePoint(x: number) { 
+>makePoint : Symbol(makePoint, Decl(getsetReturnTypes.ts, 0, 0))
+>x : Symbol(x, Decl(getsetReturnTypes.ts, 0, 19))
+
+ return { 
+  get x() { return x; } 
+>x : Symbol(x, Decl(getsetReturnTypes.ts, 1, 9))
+>x : Symbol(x, Decl(getsetReturnTypes.ts, 0, 19))
+ } 
+}; 
+var x = makePoint(2).x;
+>x : Symbol(x, Decl(getsetReturnTypes.ts, 5, 3))
+>makePoint(2).x : Symbol(x, Decl(getsetReturnTypes.ts, 1, 9))
+>makePoint : Symbol(makePoint, Decl(getsetReturnTypes.ts, 0, 0))
+>x : Symbol(x, Decl(getsetReturnTypes.ts, 1, 9))
+
+var y: number = makePoint(2).x;
+>y : Symbol(y, Decl(getsetReturnTypes.ts, 6, 3))
+>makePoint(2).x : Symbol(x, Decl(getsetReturnTypes.ts, 1, 9))
+>makePoint : Symbol(makePoint, Decl(getsetReturnTypes.ts, 0, 0))
+>x : Symbol(x, Decl(getsetReturnTypes.ts, 1, 9))
+
diff --git a/tests/baselines/reference/getsetReturnTypes.types b/tests/baselines/reference/getsetReturnTypes.types
new file mode 100644
index 0000000000000..ed08361ebe1ad
--- /dev/null
+++ b/tests/baselines/reference/getsetReturnTypes.types
@@ -0,0 +1,29 @@
+=== tests/cases/compiler/getsetReturnTypes.ts ===
+function makePoint(x: number) { 
+>makePoint : (x: number) => { readonly x: number; }
+>x : number
+
+ return { 
+>{   get x() { return x; }  } : { readonly x: number; }
+
+  get x() { return x; } 
+>x : number
+>x : number
+ } 
+}; 
+var x = makePoint(2).x;
+>x : number
+>makePoint(2).x : number
+>makePoint(2) : { readonly x: number; }
+>makePoint : (x: number) => { readonly x: number; }
+>2 : 2
+>x : number
+
+var y: number = makePoint(2).x;
+>y : number
+>makePoint(2).x : number
+>makePoint(2) : { readonly x: number; }
+>makePoint : (x: number) => { readonly x: number; }
+>2 : 2
+>x : number
+
diff --git a/tests/baselines/reference/getterMissingReturnError.errors.txt b/tests/baselines/reference/getterMissingReturnError.errors.txt
index e504de07ef423..2497ec857c74a 100644
--- a/tests/baselines/reference/getterMissingReturnError.errors.txt
+++ b/tests/baselines/reference/getterMissingReturnError.errors.txt
@@ -1,13 +1,10 @@
-tests/cases/compiler/getterMissingReturnError.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/getterMissingReturnError.ts(2,16): error TS2378: A 'get' accessor must return a value.
 
 
-==== tests/cases/compiler/getterMissingReturnError.ts (2 errors) ====
+==== tests/cases/compiler/getterMissingReturnError.ts (1 errors) ====
     class test {
         public get p2(){
                    ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~
 !!! error TS2378: A 'get' accessor must return a value.
     
         }
diff --git a/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.errors.txt b/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.errors.txt
deleted file mode 100644
index 563f30a201ccd..0000000000000
--- a/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.errors.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-tests/cases/compiler/getterThatThrowsShouldNotNeedReturn.ts(2,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/getterThatThrowsShouldNotNeedReturn.ts (1 errors) ====
-    class Greeter {
-     public get greet(): string {
-                ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-      throw ''; // should not raise an error
-     }
-     public greeting(): string {
-      throw ''; // should not raise an error
-     }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.symbols b/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.symbols
new file mode 100644
index 0000000000000..1ad6c08a520d0
--- /dev/null
+++ b/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.symbols
@@ -0,0 +1,16 @@
+=== tests/cases/compiler/getterThatThrowsShouldNotNeedReturn.ts ===
+class Greeter {
+>Greeter : Symbol(Greeter, Decl(getterThatThrowsShouldNotNeedReturn.ts, 0, 0))
+
+ public get greet(): string {
+>greet : Symbol(Greeter.greet, Decl(getterThatThrowsShouldNotNeedReturn.ts, 0, 15))
+
+  throw ''; // should not raise an error
+ }
+ public greeting(): string {
+>greeting : Symbol(Greeter.greeting, Decl(getterThatThrowsShouldNotNeedReturn.ts, 3, 2))
+
+  throw ''; // should not raise an error
+ }
+}
+
diff --git a/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.types b/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.types
new file mode 100644
index 0000000000000..24ee06529233b
--- /dev/null
+++ b/tests/baselines/reference/getterThatThrowsShouldNotNeedReturn.types
@@ -0,0 +1,18 @@
+=== tests/cases/compiler/getterThatThrowsShouldNotNeedReturn.ts ===
+class Greeter {
+>Greeter : Greeter
+
+ public get greet(): string {
+>greet : string
+
+  throw ''; // should not raise an error
+>'' : ""
+ }
+ public greeting(): string {
+>greeting : () => string
+
+  throw ''; // should not raise an error
+>'' : ""
+ }
+}
+
diff --git a/tests/baselines/reference/gettersAndSetters.errors.txt b/tests/baselines/reference/gettersAndSetters.errors.txt
index a4cc4b585e2b4..f21164c3ac0d1 100644
--- a/tests/baselines/reference/gettersAndSetters.errors.txt
+++ b/tests/baselines/reference/gettersAndSetters.errors.txt
@@ -1,14 +1,8 @@
-tests/cases/compiler/gettersAndSetters.ts(7,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSetters.ts(8,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSetters.ts(10,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSetters.ts(11,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/gettersAndSetters.ts(25,13): error TS2339: Property 'Baz' does not exist on type 'C'.
 tests/cases/compiler/gettersAndSetters.ts(26,3): error TS2339: Property 'Baz' does not exist on type 'C'.
-tests/cases/compiler/gettersAndSetters.ts(29,30): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSetters.ts(29,53): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/gettersAndSetters.ts (8 errors) ====
+==== tests/cases/compiler/gettersAndSetters.ts (2 errors) ====
     // classes
     class C {
         public fooBack = "";
@@ -16,18 +10,10 @@ tests/cases/compiler/gettersAndSetters.ts(29,53): error TS1056: Accessors are on
         public bazBack = "";
         
         public get Foo() { return this.fooBack;} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         public set Foo(foo:string) {this.fooBack = foo;} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         static get Bar() {return C.barBack;} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         static set Bar(bar:string) {C.barBack = bar;} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         public get = function() {} // ok
         public set = function() {} // ok
@@ -50,10 +36,6 @@ tests/cases/compiler/gettersAndSetters.ts(29,53): error TS1056: Accessors are on
     
     // The Foo accessors' return and param types should be contextually typed to the Foo field
     var o : {Foo:number;} = {get Foo() {return 0;}, set Foo(val:number){val}}; // o
-                                 ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
     var ofg = o.Foo;
     o.Foo = 0;
diff --git a/tests/baselines/reference/gettersAndSettersAccessibility.errors.txt b/tests/baselines/reference/gettersAndSettersAccessibility.errors.txt
index faccaab8fdfc2..270f03f5df75a 100644
--- a/tests/baselines/reference/gettersAndSettersAccessibility.errors.txt
+++ b/tests/baselines/reference/gettersAndSettersAccessibility.errors.txt
@@ -1,20 +1,14 @@
-tests/cases/compiler/gettersAndSettersAccessibility.ts(2,14): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/gettersAndSettersAccessibility.ts(2,14): error TS2379: Getter and setter accessors do not agree in visibility.
-tests/cases/compiler/gettersAndSettersAccessibility.ts(3,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/gettersAndSettersAccessibility.ts(3,13): error TS2379: Getter and setter accessors do not agree in visibility.
 
 
-==== tests/cases/compiler/gettersAndSettersAccessibility.ts (4 errors) ====
+==== tests/cases/compiler/gettersAndSettersAccessibility.ts (2 errors) ====
     class C99 {
     	private get Baz():number { return 0; }
     	            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    	            ~~~
 !!! error TS2379: Getter and setter accessors do not agree in visibility.
     	public set Baz(n:number) {} // error - accessors do not agree in visibility
     	           ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    	           ~~~
 !!! error TS2379: Getter and setter accessors do not agree in visibility.
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/gettersAndSettersErrors.errors.txt b/tests/baselines/reference/gettersAndSettersErrors.errors.txt
index a3be786cb264b..415e5593a26fc 100644
--- a/tests/baselines/reference/gettersAndSettersErrors.errors.txt
+++ b/tests/baselines/reference/gettersAndSettersErrors.errors.txt
@@ -1,23 +1,15 @@
-tests/cases/compiler/gettersAndSettersErrors.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersErrors.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/gettersAndSettersErrors.ts(5,12): error TS2300: Duplicate identifier 'Foo'.
 tests/cases/compiler/gettersAndSettersErrors.ts(5,12): error TS2403: Subsequent variable declarations must have the same type.  Variable 'Foo' must be of type 'string', but here has type 'number'.
-tests/cases/compiler/gettersAndSettersErrors.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersErrors.ts(7,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersErrors.ts(11,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/gettersAndSettersErrors.ts(6,16): error TS1054: A 'get' accessor cannot have parameters.
+tests/cases/compiler/gettersAndSettersErrors.ts(7,16): error TS1095: A 'set' accessor cannot have a return type annotation.
 tests/cases/compiler/gettersAndSettersErrors.ts(11,17): error TS2379: Getter and setter accessors do not agree in visibility.
-tests/cases/compiler/gettersAndSettersErrors.ts(12,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/gettersAndSettersErrors.ts(12,16): error TS2379: Getter and setter accessors do not agree in visibility.
 
 
-==== tests/cases/compiler/gettersAndSettersErrors.ts (10 errors) ====
+==== tests/cases/compiler/gettersAndSettersErrors.ts (6 errors) ====
     class C {
         public get Foo() { return "foo";} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         public set Foo(foo:string) {} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         public Foo = 0; // error - duplicate identifier Foo - confirmed
                ~~~
@@ -26,22 +18,18 @@ tests/cases/compiler/gettersAndSettersErrors.ts(12,16): error TS2379: Getter and
 !!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'Foo' must be of type 'string', but here has type 'number'.
         public get Goo(v:string):string {return null;} // error - getters must not have a parameter
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1054: A 'get' accessor cannot have parameters.
         public set Goo(v:string):string {} // error - setters must not specify a return type
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1095: A 'set' accessor cannot have a return type annotation.
     }
     
     class E {
         private get Baz():number { return 0; }
                     ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                    ~~~
 !!! error TS2379: Getter and setter accessors do not agree in visibility.
         public set Baz(n:number) {} // error - accessors do not agree in visibility
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2379: Getter and setter accessors do not agree in visibility.
     }
     
diff --git a/tests/baselines/reference/gettersAndSettersTypesAgree.errors.txt b/tests/baselines/reference/gettersAndSettersTypesAgree.errors.txt
deleted file mode 100644
index 7412b56e576de..0000000000000
--- a/tests/baselines/reference/gettersAndSettersTypesAgree.errors.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(5,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(9,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(9,37): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(10,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersTypesAgree.ts(10,37): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/gettersAndSettersTypesAgree.ts (8 errors) ====
-    class C {
-        public get Foo() { return "foo";} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public set Foo(foo) {} // ok - type inferred from getter return statement
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        public get Bar() { return "foo";} // ok
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public set Bar(bar:string) {} // ok - type must be declared
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    var o1 = {get Foo(){return 0;}, set Foo(val){}}; // ok - types agree (inference)
-                  ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var o2 = {get Foo(){return 0;}, set Foo(val:number){}}; // ok - types agree
-                  ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/gettersAndSettersTypesAgree.symbols b/tests/baselines/reference/gettersAndSettersTypesAgree.symbols
new file mode 100644
index 0000000000000..a992e8d1f5b8e
--- /dev/null
+++ b/tests/baselines/reference/gettersAndSettersTypesAgree.symbols
@@ -0,0 +1,31 @@
+=== tests/cases/compiler/gettersAndSettersTypesAgree.ts ===
+class C {
+>C : Symbol(C, Decl(gettersAndSettersTypesAgree.ts, 0, 0))
+
+    public get Foo() { return "foo";} // ok
+>Foo : Symbol(C.Foo, Decl(gettersAndSettersTypesAgree.ts, 0, 9), Decl(gettersAndSettersTypesAgree.ts, 1, 37))
+
+    public set Foo(foo) {} // ok - type inferred from getter return statement
+>Foo : Symbol(C.Foo, Decl(gettersAndSettersTypesAgree.ts, 0, 9), Decl(gettersAndSettersTypesAgree.ts, 1, 37))
+>foo : Symbol(foo, Decl(gettersAndSettersTypesAgree.ts, 2, 19))
+
+    public get Bar() { return "foo";} // ok
+>Bar : Symbol(C.Bar, Decl(gettersAndSettersTypesAgree.ts, 2, 26), Decl(gettersAndSettersTypesAgree.ts, 4, 37))
+
+    public set Bar(bar:string) {} // ok - type must be declared
+>Bar : Symbol(C.Bar, Decl(gettersAndSettersTypesAgree.ts, 2, 26), Decl(gettersAndSettersTypesAgree.ts, 4, 37))
+>bar : Symbol(bar, Decl(gettersAndSettersTypesAgree.ts, 5, 19))
+}
+
+var o1 = {get Foo(){return 0;}, set Foo(val){}}; // ok - types agree (inference)
+>o1 : Symbol(o1, Decl(gettersAndSettersTypesAgree.ts, 8, 3))
+>Foo : Symbol(Foo, Decl(gettersAndSettersTypesAgree.ts, 8, 10), Decl(gettersAndSettersTypesAgree.ts, 8, 31))
+>Foo : Symbol(Foo, Decl(gettersAndSettersTypesAgree.ts, 8, 10), Decl(gettersAndSettersTypesAgree.ts, 8, 31))
+>val : Symbol(val, Decl(gettersAndSettersTypesAgree.ts, 8, 40))
+
+var o2 = {get Foo(){return 0;}, set Foo(val:number){}}; // ok - types agree
+>o2 : Symbol(o2, Decl(gettersAndSettersTypesAgree.ts, 9, 3))
+>Foo : Symbol(Foo, Decl(gettersAndSettersTypesAgree.ts, 9, 10), Decl(gettersAndSettersTypesAgree.ts, 9, 31))
+>Foo : Symbol(Foo, Decl(gettersAndSettersTypesAgree.ts, 9, 10), Decl(gettersAndSettersTypesAgree.ts, 9, 31))
+>val : Symbol(val, Decl(gettersAndSettersTypesAgree.ts, 9, 40))
+
diff --git a/tests/baselines/reference/gettersAndSettersTypesAgree.types b/tests/baselines/reference/gettersAndSettersTypesAgree.types
new file mode 100644
index 0000000000000..1752ff7a628e1
--- /dev/null
+++ b/tests/baselines/reference/gettersAndSettersTypesAgree.types
@@ -0,0 +1,37 @@
+=== tests/cases/compiler/gettersAndSettersTypesAgree.ts ===
+class C {
+>C : C
+
+    public get Foo() { return "foo";} // ok
+>Foo : string
+>"foo" : "foo"
+
+    public set Foo(foo) {} // ok - type inferred from getter return statement
+>Foo : string
+>foo : string
+
+    public get Bar() { return "foo";} // ok
+>Bar : string
+>"foo" : "foo"
+
+    public set Bar(bar:string) {} // ok - type must be declared
+>Bar : string
+>bar : string
+}
+
+var o1 = {get Foo(){return 0;}, set Foo(val){}}; // ok - types agree (inference)
+>o1 : { Foo: number; }
+>{get Foo(){return 0;}, set Foo(val){}} : { Foo: number; }
+>Foo : number
+>0 : 0
+>Foo : number
+>val : number
+
+var o2 = {get Foo(){return 0;}, set Foo(val:number){}}; // ok - types agree
+>o2 : { Foo: number; }
+>{get Foo(){return 0;}, set Foo(val:number){}} : { Foo: number; }
+>Foo : number
+>0 : 0
+>Foo : number
+>val : number
+
diff --git a/tests/baselines/reference/giant.errors.txt b/tests/baselines/reference/giant.errors.txt
index 809ae03635824..4c5f6e7b72a58 100644
--- a/tests/baselines/reference/giant.errors.txt
+++ b/tests/baselines/reference/giant.errors.txt
@@ -1,44 +1,44 @@
 tests/cases/compiler/giant.ts(22,12): error TS2300: Duplicate identifier 'pgF'.
-tests/cases/compiler/giant.ts(23,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(23,16): error TS2300: Duplicate identifier 'pgF'.
+tests/cases/compiler/giant.ts(23,20): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(24,12): error TS2300: Duplicate identifier 'psF'.
-tests/cases/compiler/giant.ts(25,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(25,16): error TS2300: Duplicate identifier 'psF'.
+tests/cases/compiler/giant.ts(25,29): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(26,13): error TS2300: Duplicate identifier 'rgF'.
-tests/cases/compiler/giant.ts(27,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(27,17): error TS2300: Duplicate identifier 'rgF'.
+tests/cases/compiler/giant.ts(27,21): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(28,13): error TS2300: Duplicate identifier 'rsF'.
-tests/cases/compiler/giant.ts(29,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(29,17): error TS2300: Duplicate identifier 'rsF'.
+tests/cases/compiler/giant.ts(29,30): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(32,12): error TS2300: Duplicate identifier 'tsF'.
-tests/cases/compiler/giant.ts(33,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(33,16): error TS2300: Duplicate identifier 'tsF'.
+tests/cases/compiler/giant.ts(33,29): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(34,12): error TS2300: Duplicate identifier 'tgF'.
-tests/cases/compiler/giant.ts(35,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(35,16): error TS2300: Duplicate identifier 'tgF'.
+tests/cases/compiler/giant.ts(35,20): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(60,5): error TS1169: A computed property name in an interface must directly refer to a built-in symbol.
 tests/cases/compiler/giant.ts(60,6): error TS2304: Cannot find name 'p'.
 tests/cases/compiler/giant.ts(61,5): error TS1021: An index signature must have a type annotation.
 tests/cases/compiler/giant.ts(62,6): error TS1096: An index signature must have exactly one parameter.
 tests/cases/compiler/giant.ts(75,5): error TS2386: Overload signatures must all be optional or required.
 tests/cases/compiler/giant.ts(86,16): error TS2300: Duplicate identifier 'pgF'.
-tests/cases/compiler/giant.ts(87,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(87,20): error TS2300: Duplicate identifier 'pgF'.
+tests/cases/compiler/giant.ts(87,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(88,16): error TS2300: Duplicate identifier 'psF'.
-tests/cases/compiler/giant.ts(89,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(89,20): error TS2300: Duplicate identifier 'psF'.
+tests/cases/compiler/giant.ts(89,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(90,17): error TS2300: Duplicate identifier 'rgF'.
-tests/cases/compiler/giant.ts(91,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(91,21): error TS2300: Duplicate identifier 'rgF'.
+tests/cases/compiler/giant.ts(91,25): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(92,17): error TS2300: Duplicate identifier 'rsF'.
-tests/cases/compiler/giant.ts(93,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(93,21): error TS2300: Duplicate identifier 'rsF'.
+tests/cases/compiler/giant.ts(93,34): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(96,16): error TS2300: Duplicate identifier 'tsF'.
-tests/cases/compiler/giant.ts(97,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(97,20): error TS2300: Duplicate identifier 'tsF'.
+tests/cases/compiler/giant.ts(97,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(98,16): error TS2300: Duplicate identifier 'tgF'.
-tests/cases/compiler/giant.ts(99,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(99,20): error TS2300: Duplicate identifier 'tgF'.
+tests/cases/compiler/giant.ts(99,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(124,9): error TS1169: A computed property name in an interface must directly refer to a built-in symbol.
 tests/cases/compiler/giant.ts(124,10): error TS2304: Cannot find name 'p'.
 tests/cases/compiler/giant.ts(125,9): error TS1021: An index signature must have a type annotation.
@@ -46,23 +46,23 @@ tests/cases/compiler/giant.ts(126,10): error TS1096: An index signature must hav
 tests/cases/compiler/giant.ts(139,9): error TS2386: Overload signatures must all be optional or required.
 tests/cases/compiler/giant.ts(153,39): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(165,16): error TS2300: Duplicate identifier 'pgF'.
-tests/cases/compiler/giant.ts(166,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(166,20): error TS2300: Duplicate identifier 'pgF'.
+tests/cases/compiler/giant.ts(166,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(167,16): error TS2300: Duplicate identifier 'psF'.
-tests/cases/compiler/giant.ts(168,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(168,20): error TS2300: Duplicate identifier 'psF'.
+tests/cases/compiler/giant.ts(168,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(169,17): error TS2300: Duplicate identifier 'rgF'.
-tests/cases/compiler/giant.ts(170,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(170,21): error TS2300: Duplicate identifier 'rgF'.
+tests/cases/compiler/giant.ts(170,25): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(171,17): error TS2300: Duplicate identifier 'rsF'.
-tests/cases/compiler/giant.ts(172,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(172,21): error TS2300: Duplicate identifier 'rsF'.
+tests/cases/compiler/giant.ts(172,34): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(175,16): error TS2300: Duplicate identifier 'tsF'.
-tests/cases/compiler/giant.ts(176,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(176,20): error TS2300: Duplicate identifier 'tsF'.
+tests/cases/compiler/giant.ts(176,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(177,16): error TS2300: Duplicate identifier 'tgF'.
-tests/cases/compiler/giant.ts(178,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(178,20): error TS2300: Duplicate identifier 'tgF'.
+tests/cases/compiler/giant.ts(178,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(203,9): error TS1169: A computed property name in an interface must directly refer to a built-in symbol.
 tests/cases/compiler/giant.ts(203,10): error TS2304: Cannot find name 'p'.
 tests/cases/compiler/giant.ts(204,9): error TS1021: An index signature must have a type annotation.
@@ -75,73 +75,73 @@ tests/cases/compiler/giant.ts(242,21): error TS1183: An implementation cannot be
 tests/cases/compiler/giant.ts(243,22): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(244,16): error TS2300: Duplicate identifier 'pgF'.
 tests/cases/compiler/giant.ts(244,22): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(245,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(245,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(245,20): error TS2300: Duplicate identifier 'pgF'.
 tests/cases/compiler/giant.ts(246,16): error TS2300: Duplicate identifier 'psF'.
 tests/cases/compiler/giant.ts(246,31): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(247,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(247,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(247,20): error TS2300: Duplicate identifier 'psF'.
 tests/cases/compiler/giant.ts(248,17): error TS2300: Duplicate identifier 'rgF'.
 tests/cases/compiler/giant.ts(248,23): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(249,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(249,21): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(249,21): error TS2300: Duplicate identifier 'rgF'.
 tests/cases/compiler/giant.ts(250,17): error TS2300: Duplicate identifier 'rsF'.
 tests/cases/compiler/giant.ts(250,32): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(251,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(251,21): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(251,21): error TS2300: Duplicate identifier 'rsF'.
 tests/cases/compiler/giant.ts(253,21): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(254,16): error TS2300: Duplicate identifier 'tsF'.
 tests/cases/compiler/giant.ts(254,31): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(255,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(255,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(255,20): error TS2300: Duplicate identifier 'tsF'.
 tests/cases/compiler/giant.ts(256,16): error TS2300: Duplicate identifier 'tgF'.
 tests/cases/compiler/giant.ts(256,22): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(257,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(257,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(257,20): error TS2300: Duplicate identifier 'tgF'.
 tests/cases/compiler/giant.ts(261,22): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(261,25): error TS1036: Statements are not allowed in ambient contexts.
 tests/cases/compiler/giant.ts(266,30): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(280,12): error TS2300: Duplicate identifier 'pgF'.
-tests/cases/compiler/giant.ts(281,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(281,16): error TS2300: Duplicate identifier 'pgF'.
+tests/cases/compiler/giant.ts(281,20): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(282,12): error TS2300: Duplicate identifier 'psF'.
-tests/cases/compiler/giant.ts(283,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(283,16): error TS2300: Duplicate identifier 'psF'.
+tests/cases/compiler/giant.ts(283,29): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(284,13): error TS2300: Duplicate identifier 'rgF'.
-tests/cases/compiler/giant.ts(285,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(285,17): error TS2300: Duplicate identifier 'rgF'.
+tests/cases/compiler/giant.ts(285,21): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(286,13): error TS2300: Duplicate identifier 'rsF'.
-tests/cases/compiler/giant.ts(287,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(287,17): error TS2300: Duplicate identifier 'rsF'.
+tests/cases/compiler/giant.ts(287,30): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(290,12): error TS2300: Duplicate identifier 'tsF'.
-tests/cases/compiler/giant.ts(291,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(291,16): error TS2300: Duplicate identifier 'tsF'.
+tests/cases/compiler/giant.ts(291,29): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(292,12): error TS2300: Duplicate identifier 'tgF'.
-tests/cases/compiler/giant.ts(293,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(293,16): error TS2300: Duplicate identifier 'tgF'.
+tests/cases/compiler/giant.ts(293,20): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(318,5): error TS1169: A computed property name in an interface must directly refer to a built-in symbol.
 tests/cases/compiler/giant.ts(318,6): error TS2304: Cannot find name 'p'.
 tests/cases/compiler/giant.ts(319,5): error TS1021: An index signature must have a type annotation.
 tests/cases/compiler/giant.ts(320,6): error TS1096: An index signature must have exactly one parameter.
 tests/cases/compiler/giant.ts(333,5): error TS2386: Overload signatures must all be optional or required.
 tests/cases/compiler/giant.ts(344,16): error TS2300: Duplicate identifier 'pgF'.
-tests/cases/compiler/giant.ts(345,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(345,20): error TS2300: Duplicate identifier 'pgF'.
+tests/cases/compiler/giant.ts(345,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(346,16): error TS2300: Duplicate identifier 'psF'.
-tests/cases/compiler/giant.ts(347,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(347,20): error TS2300: Duplicate identifier 'psF'.
+tests/cases/compiler/giant.ts(347,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(348,17): error TS2300: Duplicate identifier 'rgF'.
-tests/cases/compiler/giant.ts(349,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(349,21): error TS2300: Duplicate identifier 'rgF'.
+tests/cases/compiler/giant.ts(349,25): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(350,17): error TS2300: Duplicate identifier 'rsF'.
-tests/cases/compiler/giant.ts(351,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(351,21): error TS2300: Duplicate identifier 'rsF'.
+tests/cases/compiler/giant.ts(351,34): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(354,16): error TS2300: Duplicate identifier 'tsF'.
-tests/cases/compiler/giant.ts(355,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(355,20): error TS2300: Duplicate identifier 'tsF'.
+tests/cases/compiler/giant.ts(355,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(356,16): error TS2300: Duplicate identifier 'tgF'.
-tests/cases/compiler/giant.ts(357,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(357,20): error TS2300: Duplicate identifier 'tgF'.
+tests/cases/compiler/giant.ts(357,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(382,9): error TS1169: A computed property name in an interface must directly refer to a built-in symbol.
 tests/cases/compiler/giant.ts(382,10): error TS2304: Cannot find name 'p'.
 tests/cases/compiler/giant.ts(383,9): error TS1021: An index signature must have a type annotation.
@@ -149,23 +149,23 @@ tests/cases/compiler/giant.ts(384,10): error TS1096: An index signature must hav
 tests/cases/compiler/giant.ts(397,9): error TS2386: Overload signatures must all be optional or required.
 tests/cases/compiler/giant.ts(411,39): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(423,16): error TS2300: Duplicate identifier 'pgF'.
-tests/cases/compiler/giant.ts(424,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(424,20): error TS2300: Duplicate identifier 'pgF'.
+tests/cases/compiler/giant.ts(424,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(425,16): error TS2300: Duplicate identifier 'psF'.
-tests/cases/compiler/giant.ts(426,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(426,20): error TS2300: Duplicate identifier 'psF'.
+tests/cases/compiler/giant.ts(426,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(427,17): error TS2300: Duplicate identifier 'rgF'.
-tests/cases/compiler/giant.ts(428,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(428,21): error TS2300: Duplicate identifier 'rgF'.
+tests/cases/compiler/giant.ts(428,25): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(429,17): error TS2300: Duplicate identifier 'rsF'.
-tests/cases/compiler/giant.ts(430,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(430,21): error TS2300: Duplicate identifier 'rsF'.
+tests/cases/compiler/giant.ts(430,34): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(433,16): error TS2300: Duplicate identifier 'tsF'.
-tests/cases/compiler/giant.ts(434,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(434,20): error TS2300: Duplicate identifier 'tsF'.
+tests/cases/compiler/giant.ts(434,33): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(435,16): error TS2300: Duplicate identifier 'tgF'.
-tests/cases/compiler/giant.ts(436,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/giant.ts(436,20): error TS2300: Duplicate identifier 'tgF'.
+tests/cases/compiler/giant.ts(436,24): error TS1005: '{' expected.
 tests/cases/compiler/giant.ts(461,9): error TS1169: A computed property name in an interface must directly refer to a built-in symbol.
 tests/cases/compiler/giant.ts(461,10): error TS2304: Cannot find name 'p'.
 tests/cases/compiler/giant.ts(462,9): error TS1021: An index signature must have a type annotation.
@@ -178,28 +178,28 @@ tests/cases/compiler/giant.ts(500,21): error TS1183: An implementation cannot be
 tests/cases/compiler/giant.ts(501,22): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(502,16): error TS2300: Duplicate identifier 'pgF'.
 tests/cases/compiler/giant.ts(502,22): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(503,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(503,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(503,20): error TS2300: Duplicate identifier 'pgF'.
 tests/cases/compiler/giant.ts(504,16): error TS2300: Duplicate identifier 'psF'.
 tests/cases/compiler/giant.ts(504,31): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(505,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(505,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(505,20): error TS2300: Duplicate identifier 'psF'.
 tests/cases/compiler/giant.ts(506,17): error TS2300: Duplicate identifier 'rgF'.
 tests/cases/compiler/giant.ts(506,23): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(507,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(507,21): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(507,21): error TS2300: Duplicate identifier 'rgF'.
 tests/cases/compiler/giant.ts(508,17): error TS2300: Duplicate identifier 'rsF'.
 tests/cases/compiler/giant.ts(508,32): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(509,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(509,21): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(509,21): error TS2300: Duplicate identifier 'rsF'.
 tests/cases/compiler/giant.ts(511,21): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(512,16): error TS2300: Duplicate identifier 'tsF'.
 tests/cases/compiler/giant.ts(512,31): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(513,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(513,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(513,20): error TS2300: Duplicate identifier 'tsF'.
 tests/cases/compiler/giant.ts(514,16): error TS2300: Duplicate identifier 'tgF'.
 tests/cases/compiler/giant.ts(514,22): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(515,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(515,20): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(515,20): error TS2300: Duplicate identifier 'tgF'.
 tests/cases/compiler/giant.ts(519,22): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(519,25): error TS1036: Statements are not allowed in ambient contexts.
@@ -210,28 +210,28 @@ tests/cases/compiler/giant.ts(536,17): error TS1183: An implementation cannot be
 tests/cases/compiler/giant.ts(537,18): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(538,12): error TS2300: Duplicate identifier 'pgF'.
 tests/cases/compiler/giant.ts(538,18): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(539,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(539,16): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(539,16): error TS2300: Duplicate identifier 'pgF'.
 tests/cases/compiler/giant.ts(540,12): error TS2300: Duplicate identifier 'psF'.
 tests/cases/compiler/giant.ts(540,27): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(541,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(541,16): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(541,16): error TS2300: Duplicate identifier 'psF'.
 tests/cases/compiler/giant.ts(542,13): error TS2300: Duplicate identifier 'rgF'.
 tests/cases/compiler/giant.ts(542,19): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(543,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(543,17): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(543,17): error TS2300: Duplicate identifier 'rgF'.
 tests/cases/compiler/giant.ts(544,13): error TS2300: Duplicate identifier 'rsF'.
 tests/cases/compiler/giant.ts(544,28): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(545,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(545,17): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(545,17): error TS2300: Duplicate identifier 'rsF'.
 tests/cases/compiler/giant.ts(547,17): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(548,12): error TS2300: Duplicate identifier 'tsF'.
 tests/cases/compiler/giant.ts(548,27): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(549,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(549,16): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(549,16): error TS2300: Duplicate identifier 'tsF'.
 tests/cases/compiler/giant.ts(550,12): error TS2300: Duplicate identifier 'tgF'.
 tests/cases/compiler/giant.ts(550,18): error TS1183: An implementation cannot be declared in ambient contexts.
-tests/cases/compiler/giant.ts(551,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/giant.ts(551,16): error TS1086: An accessor cannot be declared in an ambient context.
 tests/cases/compiler/giant.ts(551,16): error TS2300: Duplicate identifier 'tgF'.
 tests/cases/compiler/giant.ts(555,18): error TS1183: An implementation cannot be declared in ambient contexts.
 tests/cases/compiler/giant.ts(555,21): error TS1036: Statements are not allowed in ambient contexts.
@@ -292,33 +292,33 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'pgF'.
         public get pgF()
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
+                       ~
+!!! error TS1005: '{' expected.
         public psF(param:any) { }
                ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
         public set psF(param:any)
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
+                                ~
+!!! error TS1005: '{' expected.
         private rgF() { }
                 ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
         private get rgF()
                     ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                    ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
+                        ~
+!!! error TS1005: '{' expected.
         private rsF(param:any) { }
                 ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
         private set rsF(param:any)
                     ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                    ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
+                                 ~
+!!! error TS1005: '{' expected.
         static tV;
         static tF() { }
         static tsF(param:any) { }
@@ -326,17 +326,17 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'tsF'.
         static set tsF(param:any)
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
+                                ~
+!!! error TS1005: '{' expected.
         static tgF() { }
                ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
         static get tgF()
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
+                       ~
+!!! error TS1005: '{' expected.
     }
     interface I {
         //Call Signature
@@ -402,33 +402,33 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'pgF'.
             public get pgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
+                           ~
+!!! error TS1005: '{' expected.
             public psF(param:any) { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
             public set psF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
+                                    ~
+!!! error TS1005: '{' expected.
             private rgF() { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
             private get rgF()
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
+                            ~
+!!! error TS1005: '{' expected.
             private rsF(param:any) { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
             private set rsF(param:any)
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
+                                     ~
+!!! error TS1005: '{' expected.
             static tV;
             static tF() { }
             static tsF(param:any) { }
@@ -436,17 +436,17 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'tsF'.
             static set tsF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
+                                    ~
+!!! error TS1005: '{' expected.
             static tgF() { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
             static get tgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
+                           ~
+!!! error TS1005: '{' expected.
         }
         interface I {
             //Call Signature
@@ -529,33 +529,33 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'pgF'.
             public get pgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
+                           ~
+!!! error TS1005: '{' expected.
             public psF(param:any) { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
             public set psF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
+                                    ~
+!!! error TS1005: '{' expected.
             private rgF() { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
             private get rgF()
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
+                            ~
+!!! error TS1005: '{' expected.
             private rsF(param:any) { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
             private set rsF(param:any)
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
+                                     ~
+!!! error TS1005: '{' expected.
             static tV;
             static tF() { }
             static tsF(param:any) { }
@@ -563,17 +563,17 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'tsF'.
             static set tsF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
+                                    ~
+!!! error TS1005: '{' expected.
             static tgF() { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
             static get tgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
+                           ~
+!!! error TS1005: '{' expected.
         }
         export interface eI {
             //Call Signature
@@ -666,7 +666,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             public get pgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
             public psF(param:any) { }
@@ -676,7 +676,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             public set psF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
             private rgF() { }
@@ -686,7 +686,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             private get rgF()
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                         ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
             private rsF(param:any) { }
@@ -696,7 +696,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             private set rsF(param:any)
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                         ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
             static tV;
@@ -710,7 +710,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             static set tsF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
             static tgF() { }
@@ -720,7 +720,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             static get tgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
         }
@@ -756,33 +756,33 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'pgF'.
         public get pgF()
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
+                       ~
+!!! error TS1005: '{' expected.
         public psF(param:any) { }
                ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
         public set psF(param:any)
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
+                                ~
+!!! error TS1005: '{' expected.
         private rgF() { }
                 ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
         private get rgF()
                     ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                    ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
+                        ~
+!!! error TS1005: '{' expected.
         private rsF(param:any) { }
                 ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
         private set rsF(param:any)
                     ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                    ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
+                                 ~
+!!! error TS1005: '{' expected.
         static tV;
         static tF() { }
         static tsF(param:any) { }
@@ -790,17 +790,17 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'tsF'.
         static set tsF(param:any)
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
+                                ~
+!!! error TS1005: '{' expected.
         static tgF() { }
                ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
         static get tgF()
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
+                       ~
+!!! error TS1005: '{' expected.
     }
     export interface eI {
         //Call Signature
@@ -866,33 +866,33 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'pgF'.
             public get pgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
+                           ~
+!!! error TS1005: '{' expected.
             public psF(param:any) { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
             public set psF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
+                                    ~
+!!! error TS1005: '{' expected.
             private rgF() { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
             private get rgF()
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
+                            ~
+!!! error TS1005: '{' expected.
             private rsF(param:any) { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
             private set rsF(param:any)
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
+                                     ~
+!!! error TS1005: '{' expected.
             static tV;
             static tF() { }
             static tsF(param:any) { }
@@ -900,17 +900,17 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'tsF'.
             static set tsF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
+                                    ~
+!!! error TS1005: '{' expected.
             static tgF() { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
             static get tgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
+                           ~
+!!! error TS1005: '{' expected.
         }
         interface I {
             //Call Signature
@@ -993,33 +993,33 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'pgF'.
             public get pgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
+                           ~
+!!! error TS1005: '{' expected.
             public psF(param:any) { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
             public set psF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
+                                    ~
+!!! error TS1005: '{' expected.
             private rgF() { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
             private get rgF()
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
+                            ~
+!!! error TS1005: '{' expected.
             private rsF(param:any) { }
                     ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
             private set rsF(param:any)
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                        ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
+                                     ~
+!!! error TS1005: '{' expected.
             static tV;
             static tF() { }
             static tsF(param:any) { }
@@ -1027,17 +1027,17 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS2300: Duplicate identifier 'tsF'.
             static set tsF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
+                                    ~
+!!! error TS1005: '{' expected.
             static tgF() { }
                    ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
             static get tgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                       ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
+                           ~
+!!! error TS1005: '{' expected.
         }
         export interface eI {
             //Call Signature
@@ -1130,7 +1130,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             public get pgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
             public psF(param:any) { }
@@ -1140,7 +1140,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             public set psF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
             private rgF() { }
@@ -1150,7 +1150,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             private get rgF()
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                         ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
             private rsF(param:any) { }
@@ -1160,7 +1160,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             private set rsF(param:any)
                         ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                         ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
             static tV;
@@ -1174,7 +1174,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             static set tsF(param:any)
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
             static tgF() { }
@@ -1184,7 +1184,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
             static get tgF()
                        ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                        ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
         }
@@ -1230,7 +1230,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
         public get pgF()
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                    ~~~
 !!! error TS2300: Duplicate identifier 'pgF'.
         public psF(param:any) { }
@@ -1240,7 +1240,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
         public set psF(param:any)
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                    ~~~
 !!! error TS2300: Duplicate identifier 'psF'.
         private rgF() { }
@@ -1250,7 +1250,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
         private get rgF()
                     ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                     ~~~
 !!! error TS2300: Duplicate identifier 'rgF'.
         private rsF(param:any) { }
@@ -1260,7 +1260,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
         private set rsF(param:any)
                     ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                     ~~~
 !!! error TS2300: Duplicate identifier 'rsF'.
         static tV;
@@ -1274,7 +1274,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
         static set tsF(param:any)
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                    ~~~
 !!! error TS2300: Duplicate identifier 'tsF'.
         static tgF() { }
@@ -1284,7 +1284,7 @@ tests/cases/compiler/giant.ts(675,30): error TS1183: An implementation cannot be
 !!! error TS1183: An implementation cannot be declared in ambient contexts.
         static get tgF()
                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1086: An accessor cannot be declared in an ambient context.
                    ~~~
 !!! error TS2300: Duplicate identifier 'tgF'.
     }
diff --git a/tests/baselines/reference/giant.js b/tests/baselines/reference/giant.js
index 71f78eeac53d8..f9e4819a746f9 100644
--- a/tests/baselines/reference/giant.js
+++ b/tests/baselines/reference/giant.js
@@ -683,7 +683,7 @@ export declare module eaM {
 //// [giant.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     /*
         Prefixes
         p -> public
diff --git a/tests/baselines/reference/globalAugmentationModuleResolution.js b/tests/baselines/reference/globalAugmentationModuleResolution.js
index fae150bb709be..31b1ad42c4f03 100644
--- a/tests/baselines/reference/globalAugmentationModuleResolution.js
+++ b/tests/baselines/reference/globalAugmentationModuleResolution.js
@@ -7,4 +7,4 @@ declare global {
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/illegalSuperCallsInConstructor.errors.txt b/tests/baselines/reference/illegalSuperCallsInConstructor.errors.txt
index 1d3d2e7c2754c..fe84bb8c91d1a 100644
--- a/tests/baselines/reference/illegalSuperCallsInConstructor.errors.txt
+++ b/tests/baselines/reference/illegalSuperCallsInConstructor.errors.txt
@@ -2,13 +2,11 @@ tests/cases/compiler/illegalSuperCallsInConstructor.ts(6,5): error TS2377: Const
 tests/cases/compiler/illegalSuperCallsInConstructor.ts(7,24): error TS2337: Super calls are not permitted outside constructors or in nested functions inside constructors.
 tests/cases/compiler/illegalSuperCallsInConstructor.ts(8,26): error TS2337: Super calls are not permitted outside constructors or in nested functions inside constructors.
 tests/cases/compiler/illegalSuperCallsInConstructor.ts(9,32): error TS2337: Super calls are not permitted outside constructors or in nested functions inside constructors.
-tests/cases/compiler/illegalSuperCallsInConstructor.ts(11,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/illegalSuperCallsInConstructor.ts(12,17): error TS2337: Super calls are not permitted outside constructors or in nested functions inside constructors.
-tests/cases/compiler/illegalSuperCallsInConstructor.ts(15,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/illegalSuperCallsInConstructor.ts(16,17): error TS2337: Super calls are not permitted outside constructors or in nested functions inside constructors.
 
 
-==== tests/cases/compiler/illegalSuperCallsInConstructor.ts (8 errors) ====
+==== tests/cases/compiler/illegalSuperCallsInConstructor.ts (6 errors) ====
     class Base {
         x: string;
     }
@@ -32,8 +30,6 @@ tests/cases/compiler/illegalSuperCallsInConstructor.ts(16,17): error TS2337: Sup
     ~~~~~~~~~~~~~~~~~~
                 get foo() {
     ~~~~~~~~~~~~~~~~~~~~~~~
-                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                     super();
     ~~~~~~~~~~~~~~~~~~~~~~~~
                     ~~~~~
@@ -44,8 +40,6 @@ tests/cases/compiler/illegalSuperCallsInConstructor.ts(16,17): error TS2337: Sup
     ~~~~~~~~~~~~~~
                 set foo(v: number) {
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-                    ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                     super();
     ~~~~~~~~~~~~~~~~~~~~~~~~
                     ~~~~~
diff --git a/tests/baselines/reference/implicitAnyCastedValue.errors.txt b/tests/baselines/reference/implicitAnyCastedValue.errors.txt
index 773fb2ed94e7a..c6d2ca2d269b4 100644
--- a/tests/baselines/reference/implicitAnyCastedValue.errors.txt
+++ b/tests/baselines/reference/implicitAnyCastedValue.errors.txt
@@ -1,15 +1,12 @@
 tests/cases/compiler/implicitAnyCastedValue.ts(10,5): error TS7008: Member 'bar' implicitly has an 'any' type.
 tests/cases/compiler/implicitAnyCastedValue.ts(11,5): error TS7008: Member 'foo' implicitly has an 'any' type.
-tests/cases/compiler/implicitAnyCastedValue.ts(12,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/implicitAnyCastedValue.ts(26,5): error TS7008: Member 'getValue' implicitly has an 'any' type.
-tests/cases/compiler/implicitAnyCastedValue.ts(28,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/implicitAnyCastedValue.ts(32,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/implicitAnyCastedValue.ts(41,10): error TS7010: 'notCastedNull', which lacks return-type annotation, implicitly has an 'any' return type.
 tests/cases/compiler/implicitAnyCastedValue.ts(53,24): error TS7006: Parameter 'x' implicitly has an 'any' type.
 tests/cases/compiler/implicitAnyCastedValue.ts(62,24): error TS7006: Parameter 'x' implicitly has an 'any' type.
 
 
-==== tests/cases/compiler/implicitAnyCastedValue.ts (9 errors) ====
+==== tests/cases/compiler/implicitAnyCastedValue.ts (6 errors) ====
     var x = function () {
         return <any>0;  // this should not be an error
     }
@@ -26,8 +23,6 @@ tests/cases/compiler/implicitAnyCastedValue.ts(62,24): error TS7006: Parameter '
         ~~~~~~~~~~~~~~~~
 !!! error TS7008: Member 'foo' implicitly has an 'any' type.
         public get tempVar() {
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return <any>0;  // this should not be an error
         }
     
@@ -46,14 +41,10 @@ tests/cases/compiler/implicitAnyCastedValue.ts(62,24): error TS7006: Parameter '
 !!! error TS7008: Member 'getValue' implicitly has an 'any' type.
     
         public get castedGet() {
-                   ~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return <any>this.getValue;  // this should not be an error
         }
     
         public get notCastedGet() {
-                   ~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return this.getValue;  // this should not be an error
         }
     }
diff --git a/tests/baselines/reference/implicitAnyGetAndSetAccessorWithAnyReturnType.errors.txt b/tests/baselines/reference/implicitAnyGetAndSetAccessorWithAnyReturnType.errors.txt
index 1e2de97aae068..92e58e0bce428 100644
--- a/tests/baselines/reference/implicitAnyGetAndSetAccessorWithAnyReturnType.errors.txt
+++ b/tests/baselines/reference/implicitAnyGetAndSetAccessorWithAnyReturnType.errors.txt
@@ -1,29 +1,21 @@
 tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(3,5): error TS7008: Member 'getAndSet' implicitly has an 'any' type.
-tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(4,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(9,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(15,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(15,16): error TS7032: Property 'haveOnlySet' implicitly has type 'any', because its set accessor lacks a parameter type annotation.
 tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(15,28): error TS7006: Parameter 'newXValue' implicitly has an 'any' type.
-tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(20,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(20,16): error TS7010: 'haveOnlyGet', which lacks return-type annotation, implicitly has an 'any' return type.
 
 
-==== tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts (8 errors) ====
+==== tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts (4 errors) ====
     // these should be errors
     class GetAndSet {
         getAndSet = null;             // error at "getAndSet"
         ~~~~~~~~~~~~~~~~~
 !!! error TS7008: Member 'getAndSet' implicitly has an 'any' type.
         public get haveGetAndSet() {  // this should not be an error
-                   ~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return this.getAndSet;
         }
         
         // this shouldn't be an error
         public set haveGetAndSet(value) {  // error at "value"
-                   ~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             this.getAndSet = value;
         }
     }
@@ -31,8 +23,6 @@ tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(20,16): er
     class SetterOnly {
         public set haveOnlySet(newXValue) {  // error at "haveOnlySet, newXValue"
                    ~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~~~~~~~~~
 !!! error TS7032: Property 'haveOnlySet' implicitly has type 'any', because its set accessor lacks a parameter type annotation.
                                ~~~~~~~~~
 !!! error TS7006: Parameter 'newXValue' implicitly has an 'any' type.
@@ -42,8 +32,6 @@ tests/cases/compiler/implicitAnyGetAndSetAccessorWithAnyReturnType.ts(20,16): er
     class GetterOnly {
         public get haveOnlyGet() {  // error at "haveOnlyGet"
                    ~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~~~~~~~~~
 !!! error TS7010: 'haveOnlyGet', which lacks return-type annotation, implicitly has an 'any' return type.
             return null;
         }
diff --git a/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.js b/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.js
index 60bea32e305fa..639d95cfea41e 100644
--- a/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.js
+++ b/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.js
@@ -16,7 +16,7 @@ module m_private {
 
 //// [importAliasAnExternalModuleInsideAnInternalModule_file0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m;
 (function (m) {
     function foo() { }
@@ -24,7 +24,7 @@ var m;
 })(m = exports.m || (exports.m = {}));
 //// [importAliasAnExternalModuleInsideAnInternalModule_file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var r = require("./importAliasAnExternalModuleInsideAnInternalModule_file0");
 var m_private;
 (function (m_private) {
diff --git a/tests/baselines/reference/importAsBaseClass.js b/tests/baselines/reference/importAsBaseClass.js
index 725390825c605..887cbd82c0f61 100644
--- a/tests/baselines/reference/importAsBaseClass.js
+++ b/tests/baselines/reference/importAsBaseClass.js
@@ -12,7 +12,7 @@ class Hello extends Greeter { }
 
 //// [importAsBaseClass_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Greeter = (function () {
     function Greeter() {
     }
@@ -32,7 +32,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Greeter = require("./importAsBaseClass_0");
 var Hello = (function (_super) {
     __extends(Hello, _super);
diff --git a/tests/baselines/reference/importDecl.js b/tests/baselines/reference/importDecl.js
index 1e5e5d0ec719e..dfea0be0aa946 100644
--- a/tests/baselines/reference/importDecl.js
+++ b/tests/baselines/reference/importDecl.js
@@ -83,7 +83,7 @@ export var useMultiImport_m4_f4 = multiImport_m4.foo();
 
 //// [importDecl_require.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
@@ -94,7 +94,7 @@ function foo() { return null; }
 exports.foo = foo;
 //// [importDecl_require1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
@@ -106,7 +106,7 @@ function foo() { return null; }
 exports.foo = foo;
 //// [importDecl_require2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
@@ -117,7 +117,7 @@ function foo() { return null; }
 exports.foo = foo;
 //// [importDecl_require3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
@@ -128,12 +128,12 @@ function foo() { return null; }
 exports.foo = foo;
 //// [importDecl_require4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo2() { return null; }
 exports.foo2 = foo2;
 //// [importDecl_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='importDecl_require.ts'/>
 ///<reference path='importDecl_require1.ts'/>
 ///<reference path='importDecl_require2.ts'/>
diff --git a/tests/baselines/reference/importDeclRefereingExternalModuleWithNoResolve.js b/tests/baselines/reference/importDeclRefereingExternalModuleWithNoResolve.js
index 1aadcb875f08b..e2fe46cad4ccd 100644
--- a/tests/baselines/reference/importDeclRefereingExternalModuleWithNoResolve.js
+++ b/tests/baselines/reference/importDeclRefereingExternalModuleWithNoResolve.js
@@ -7,4 +7,4 @@ declare module "m1" {
 
 //// [importDeclRefereingExternalModuleWithNoResolve.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/importDeclWithClassModifiers.js b/tests/baselines/reference/importDeclWithClassModifiers.js
index 00e5dae1f9593..f5769f7c722cd 100644
--- a/tests/baselines/reference/importDeclWithClassModifiers.js
+++ b/tests/baselines/reference/importDeclWithClassModifiers.js
@@ -12,7 +12,7 @@ var b: a;
 //// [importDeclWithClassModifiers.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = x.c;
     exports.b = x.c;
     exports.c = x.c;
diff --git a/tests/baselines/reference/importDeclWithDeclareModifier.js b/tests/baselines/reference/importDeclWithDeclareModifier.js
index e7929ac27fc29..ed5b2ff5710b6 100644
--- a/tests/baselines/reference/importDeclWithDeclareModifier.js
+++ b/tests/baselines/reference/importDeclWithDeclareModifier.js
@@ -9,6 +9,6 @@ var b: a;
 
 //// [importDeclWithDeclareModifier.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = x.c;
 var b;
diff --git a/tests/baselines/reference/importDeclWithExportModifier.js b/tests/baselines/reference/importDeclWithExportModifier.js
index 26076c2630eff..f7c21a83212bb 100644
--- a/tests/baselines/reference/importDeclWithExportModifier.js
+++ b/tests/baselines/reference/importDeclWithExportModifier.js
@@ -10,7 +10,7 @@ var b: a;
 //// [importDeclWithExportModifier.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a = x.c;
     var b;
 });
diff --git a/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.js b/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.js
index ce5069c335edd..491f5c92ccb52 100644
--- a/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.js
+++ b/tests/baselines/reference/importDeclWithExportModifierAndExportAssignment.js
@@ -8,5 +8,5 @@ export = x;
 
 //// [importDeclWithExportModifierAndExportAssignment.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = x.c;
diff --git a/tests/baselines/reference/importDeclarationUsedAsTypeQuery.js b/tests/baselines/reference/importDeclarationUsedAsTypeQuery.js
index cce30fd8b85e6..318eab2f7d61b 100644
--- a/tests/baselines/reference/importDeclarationUsedAsTypeQuery.js
+++ b/tests/baselines/reference/importDeclarationUsedAsTypeQuery.js
@@ -13,7 +13,7 @@ export var x: typeof a;
 
 //// [importDeclarationUsedAsTypeQuery_require.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
@@ -22,7 +22,7 @@ var B = (function () {
 exports.B = B;
 //// [importDeclarationUsedAsTypeQuery_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 
 
 //// [importDeclarationUsedAsTypeQuery_require.d.ts]
diff --git a/tests/baselines/reference/importImportOnlyModule.js b/tests/baselines/reference/importImportOnlyModule.js
index 0c6f0540354c8..fc3ebc3263520 100644
--- a/tests/baselines/reference/importImportOnlyModule.js
+++ b/tests/baselines/reference/importImportOnlyModule.js
@@ -18,7 +18,7 @@ var x = foo; // Cause a runtime dependency
 //// [foo_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C1 = (function () {
         function C1() {
             this.m1 = 42;
@@ -31,12 +31,12 @@ define(["require", "exports"], function (require, exports) {
 //// [foo_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var answer = 42; // No exports
 });
 //// [foo_2.js]
 define(["require", "exports", "./foo_1"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x = foo; // Cause a runtime dependency
 });
diff --git a/tests/baselines/reference/importInsideModule.js b/tests/baselines/reference/importInsideModule.js
index da492a7103d92..7b4c2358961c8 100644
--- a/tests/baselines/reference/importInsideModule.js
+++ b/tests/baselines/reference/importInsideModule.js
@@ -11,7 +11,7 @@ export module myModule {
 
 //// [importInsideModule_file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var myModule;
 (function (myModule) {
     var a = foo.x;
diff --git a/tests/baselines/reference/importNonExternalModule.js b/tests/baselines/reference/importNonExternalModule.js
index 0340bcd35cb3e..a79371922ac59 100644
--- a/tests/baselines/reference/importNonExternalModule.js
+++ b/tests/baselines/reference/importNonExternalModule.js
@@ -21,7 +21,7 @@ var foo;
 //// [foo_1.js]
 define(["require", "exports", "./foo_0"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // Import should fail.  foo_0 not an external module
     if (foo.answer === 42) {
     }
diff --git a/tests/baselines/reference/importNonStringLiteral.js b/tests/baselines/reference/importNonStringLiteral.js
index eb76621f7c06e..259e0b22f28e4 100644
--- a/tests/baselines/reference/importNonStringLiteral.js
+++ b/tests/baselines/reference/importNonStringLiteral.js
@@ -5,5 +5,5 @@ import foo = require(x); // invalid
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = "filename";
diff --git a/tests/baselines/reference/importTsBeforeDTs.js b/tests/baselines/reference/importTsBeforeDTs.js
index 40213ce99687d..8550b78159420 100644
--- a/tests/baselines/reference/importTsBeforeDTs.js
+++ b/tests/baselines/reference/importTsBeforeDTs.js
@@ -15,11 +15,11 @@ var z2 = foo.y + 10; // Should resolve
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.y = 42;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./foo_0");
 var z1 = foo.x + 10; // Should error, as .ts preferred over .d.ts
 var z2 = foo.y + 10; // Should resolve
diff --git a/tests/baselines/reference/importUsedInExtendsList1.js b/tests/baselines/reference/importUsedInExtendsList1.js
index 15bf907ddd5b1..a2db377011eea 100644
--- a/tests/baselines/reference/importUsedInExtendsList1.js
+++ b/tests/baselines/reference/importUsedInExtendsList1.js
@@ -13,7 +13,7 @@ var r: string = s.foo;
 
 //// [importUsedInExtendsList1_require.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Super = (function () {
     function Super() {
     }
@@ -32,7 +32,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='importUsedInExtendsList1_require.ts'/>
 var foo = require("./importUsedInExtendsList1_require");
 var Sub = (function (_super) {
diff --git a/tests/baselines/reference/importWithTrailingSlash.js b/tests/baselines/reference/importWithTrailingSlash.js
index 9df01dcee66fd..9204fbdd5132a 100644
--- a/tests/baselines/reference/importWithTrailingSlash.js
+++ b/tests/baselines/reference/importWithTrailingSlash.js
@@ -21,23 +21,23 @@ aIndex.aIndex;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = { a: 0 };
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = { a: 0 };
 //// [index.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = { aIndex: 0 };
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = { aIndex: 0 };
 //// [test.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var _1 = require(".");
 var _2 = require("./");
-_1["default"].a;
-_2["default"].aIndex;
+_1.default.a;
+_2.default.aIndex;
 //// [test.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var __1 = require("..");
 var _1 = require("../");
-__1["default"].a;
-_1["default"].aIndex;
+__1.default.a;
+_1.default.aIndex;
diff --git a/tests/baselines/reference/importWithTrailingSlash_noResolve.js b/tests/baselines/reference/importWithTrailingSlash_noResolve.js
index 20afebedc2b1b..8c821cc7c198a 100644
--- a/tests/baselines/reference/importWithTrailingSlash_noResolve.js
+++ b/tests/baselines/reference/importWithTrailingSlash_noResolve.js
@@ -4,4 +4,4 @@ import foo from "./foo/";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/import_reference-exported-alias.js b/tests/baselines/reference/import_reference-exported-alias.js
index b3d607a6943a6..d1fc6db5a9d37 100644
--- a/tests/baselines/reference/import_reference-exported-alias.js
+++ b/tests/baselines/reference/import_reference-exported-alias.js
@@ -45,7 +45,7 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "file1"], function (require, exports, appJs) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Services = appJs.Services;
     var UserServices = Services.UserServices;
     var x = new UserServices().getUserName();
diff --git a/tests/baselines/reference/import_reference-to-type-alias.js b/tests/baselines/reference/import_reference-to-type-alias.js
index c6771d47bae30..1bd187c4706bf 100644
--- a/tests/baselines/reference/import_reference-to-type-alias.js
+++ b/tests/baselines/reference/import_reference-to-type-alias.js
@@ -20,7 +20,7 @@ var x = new Services.UserServices().getUserName();
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var App;
     (function (App) {
         var Services;
@@ -40,7 +40,7 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "file1"], function (require, exports, appJs) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Services = appJs.App.Services;
     var x = new Services.UserServices().getUserName();
 });
diff --git a/tests/baselines/reference/import_unneeded-require-when-referenecing-aliased-type-throug-array.js b/tests/baselines/reference/import_unneeded-require-when-referenecing-aliased-type-throug-array.js
index 1cd0376ddedf1..09abbb09683ba 100644
--- a/tests/baselines/reference/import_unneeded-require-when-referenecing-aliased-type-throug-array.js
+++ b/tests/baselines/reference/import_unneeded-require-when-referenecing-aliased-type-throug-array.js
@@ -19,7 +19,7 @@ var p = testData[0].name;
 //// [a.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var testData;
     var p = testData[0].name;
 });
diff --git a/tests/baselines/reference/import_var-referencing-an-imported-module-alias.js b/tests/baselines/reference/import_var-referencing-an-imported-module-alias.js
index 9e99e9c75ebf0..b07a33ed10ff9 100644
--- a/tests/baselines/reference/import_var-referencing-an-imported-module-alias.js
+++ b/tests/baselines/reference/import_var-referencing-an-imported-module-alias.js
@@ -12,7 +12,7 @@ var v = new hostVar.Host();
 //// [host.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Host = (function () {
         function Host() {
         }
@@ -23,7 +23,7 @@ define(["require", "exports"], function (require, exports) {
 //// [consumer.js]
 define(["require", "exports", "host"], function (require, exports, host) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var hostVar = host;
     var v = new hostVar.Host();
 });
diff --git a/tests/baselines/reference/importedAliasesInTypePositions.js b/tests/baselines/reference/importedAliasesInTypePositions.js
index b82ac22f4ede4..60b7fd17362bd 100644
--- a/tests/baselines/reference/importedAliasesInTypePositions.js
+++ b/tests/baselines/reference/importedAliasesInTypePositions.js
@@ -21,7 +21,7 @@ export module ImportingModule {
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var elaborate;
     (function (elaborate) {
         var nested;
@@ -46,7 +46,7 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var ImportingModule;
     (function (ImportingModule) {
         var UsesReferredType = (function () {
diff --git a/tests/baselines/reference/importedModuleClassNameClash.js b/tests/baselines/reference/importedModuleClassNameClash.js
index 5f4f9677dcd6c..f0e6faa45b97b 100644
--- a/tests/baselines/reference/importedModuleClassNameClash.js
+++ b/tests/baselines/reference/importedModuleClassNameClash.js
@@ -9,7 +9,7 @@ class foo { }
 //// [importedModuleClassNameClash.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var foo = (function () {
         function foo() {
         }
diff --git a/tests/baselines/reference/importsImplicitlyReadonly.js b/tests/baselines/reference/importsImplicitlyReadonly.js
index 724b8c14e5322..a78e39cab8475 100644
--- a/tests/baselines/reference/importsImplicitlyReadonly.js
+++ b/tests/baselines/reference/importsImplicitlyReadonly.js
@@ -22,13 +22,13 @@ a3.y = 1;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 var y = 1;
 exports.y = y;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a_1 = require("./a");
 var a1 = require("./a");
 var a2 = require("./a");
diff --git a/tests/baselines/reference/indexedAccessRelation.js b/tests/baselines/reference/indexedAccessRelation.js
index 10384c9eacd28..4514286c3b664 100644
--- a/tests/baselines/reference/indexedAccessRelation.js
+++ b/tests/baselines/reference/indexedAccessRelation.js
@@ -32,7 +32,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Component = (function () {
     function Component() {
     }
diff --git a/tests/baselines/reference/indexedAccessTypeConstraints.js b/tests/baselines/reference/indexedAccessTypeConstraints.js
index 075e93dfa2353..8a0c6dc983baf 100644
--- a/tests/baselines/reference/indexedAccessTypeConstraints.js
+++ b/tests/baselines/reference/indexedAccessTypeConstraints.js
@@ -48,7 +48,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Parent = (function () {
     function Parent() {
     }
diff --git a/tests/baselines/reference/inferSetterParamType.errors.txt b/tests/baselines/reference/inferSetterParamType.errors.txt
index 7b28c52d48b1b..bd499ce89f949 100644
--- a/tests/baselines/reference/inferSetterParamType.errors.txt
+++ b/tests/baselines/reference/inferSetterParamType.errors.txt
@@ -1,36 +1,24 @@
-tests/cases/compiler/inferSetterParamType.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inferSetterParamType.ts(6,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inferSetterParamType.ts(12,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/inferSetterParamType.ts(13,9): error TS2322: Type '0' is not assignable to type 'string'.
-tests/cases/compiler/inferSetterParamType.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/inferSetterParamType.ts (5 errors) ====
+==== tests/cases/compiler/inferSetterParamType.ts (1 errors) ====
     class Foo {
     
         get bar() {
-            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 0;
         }
         set bar(n) { // should not be an error - infer number
-            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         }
     }
     
     class Foo2 {
     
         get bar() {
-            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 0; // should be an error - can't coerce infered return type to match setter annotated type
             ~~~~~~~~~
 !!! error TS2322: Type '0' is not assignable to type 'string'.
         }
         set bar(n:string) {
-            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         }
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/infinitelyExpandingOverloads.errors.txt b/tests/baselines/reference/infinitelyExpandingOverloads.errors.txt
deleted file mode 100644
index fc3c49477fb62..0000000000000
--- a/tests/baselines/reference/infinitelyExpandingOverloads.errors.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-tests/cases/compiler/infinitelyExpandingOverloads.ts(23,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/infinitelyExpandingOverloads.ts (1 errors) ====
-    interface KnockoutSubscription2<T> {
-        target: KnockoutObservableBase2<T>;
-    }
-    interface KnockoutObservableBase2<T> {
-        subscribe(callback: (newValue: T) => void, target?: any, topic?: string): KnockoutSubscription2<T>;
-    }
-    interface ValidationPlacement2<TValue> {
-        initialize(validatable: Validatable2<TValue>): void;
-    }
-    interface Validatable2<TValue> {
-        validators: KnockoutObservableBase2<Validator2<TValue>>;
-    }
-    class Validator2<TValue> {
-        private _subscription: KnockoutSubscription2<TValue>;
-    }
-    class ViewModel<TValue> {
-        public validationPlacements: Array<ValidationPlacement2<TValue>> = new Array<ValidationPlacement2<TValue>>();
-    }
-    class Widget<TValue> {
-        constructor(viewModelType: new () => ViewModel<TValue>); // Shouldnt error on this overload
-        constructor(viewModelType: new () => ViewModel<TValue>) {
-        }
-        public get options(): ViewModel<TValue> {
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return null;
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/infinitelyExpandingOverloads.symbols b/tests/baselines/reference/infinitelyExpandingOverloads.symbols
new file mode 100644
index 0000000000000..760595d78724f
--- /dev/null
+++ b/tests/baselines/reference/infinitelyExpandingOverloads.symbols
@@ -0,0 +1,88 @@
+=== tests/cases/compiler/infinitelyExpandingOverloads.ts ===
+interface KnockoutSubscription2<T> {
+>KnockoutSubscription2 : Symbol(KnockoutSubscription2, Decl(infinitelyExpandingOverloads.ts, 0, 0))
+>T : Symbol(T, Decl(infinitelyExpandingOverloads.ts, 0, 32))
+
+    target: KnockoutObservableBase2<T>;
+>target : Symbol(KnockoutSubscription2.target, Decl(infinitelyExpandingOverloads.ts, 0, 36))
+>KnockoutObservableBase2 : Symbol(KnockoutObservableBase2, Decl(infinitelyExpandingOverloads.ts, 2, 1))
+>T : Symbol(T, Decl(infinitelyExpandingOverloads.ts, 0, 32))
+}
+interface KnockoutObservableBase2<T> {
+>KnockoutObservableBase2 : Symbol(KnockoutObservableBase2, Decl(infinitelyExpandingOverloads.ts, 2, 1))
+>T : Symbol(T, Decl(infinitelyExpandingOverloads.ts, 3, 34))
+
+    subscribe(callback: (newValue: T) => void, target?: any, topic?: string): KnockoutSubscription2<T>;
+>subscribe : Symbol(KnockoutObservableBase2.subscribe, Decl(infinitelyExpandingOverloads.ts, 3, 38))
+>callback : Symbol(callback, Decl(infinitelyExpandingOverloads.ts, 4, 14))
+>newValue : Symbol(newValue, Decl(infinitelyExpandingOverloads.ts, 4, 25))
+>T : Symbol(T, Decl(infinitelyExpandingOverloads.ts, 3, 34))
+>target : Symbol(target, Decl(infinitelyExpandingOverloads.ts, 4, 46))
+>topic : Symbol(topic, Decl(infinitelyExpandingOverloads.ts, 4, 60))
+>KnockoutSubscription2 : Symbol(KnockoutSubscription2, Decl(infinitelyExpandingOverloads.ts, 0, 0))
+>T : Symbol(T, Decl(infinitelyExpandingOverloads.ts, 3, 34))
+}
+interface ValidationPlacement2<TValue> {
+>ValidationPlacement2 : Symbol(ValidationPlacement2, Decl(infinitelyExpandingOverloads.ts, 5, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 6, 31))
+
+    initialize(validatable: Validatable2<TValue>): void;
+>initialize : Symbol(ValidationPlacement2.initialize, Decl(infinitelyExpandingOverloads.ts, 6, 40))
+>validatable : Symbol(validatable, Decl(infinitelyExpandingOverloads.ts, 7, 15))
+>Validatable2 : Symbol(Validatable2, Decl(infinitelyExpandingOverloads.ts, 8, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 6, 31))
+}
+interface Validatable2<TValue> {
+>Validatable2 : Symbol(Validatable2, Decl(infinitelyExpandingOverloads.ts, 8, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 9, 23))
+
+    validators: KnockoutObservableBase2<Validator2<TValue>>;
+>validators : Symbol(Validatable2.validators, Decl(infinitelyExpandingOverloads.ts, 9, 32))
+>KnockoutObservableBase2 : Symbol(KnockoutObservableBase2, Decl(infinitelyExpandingOverloads.ts, 2, 1))
+>Validator2 : Symbol(Validator2, Decl(infinitelyExpandingOverloads.ts, 11, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 9, 23))
+}
+class Validator2<TValue> {
+>Validator2 : Symbol(Validator2, Decl(infinitelyExpandingOverloads.ts, 11, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 12, 17))
+
+    private _subscription: KnockoutSubscription2<TValue>;
+>_subscription : Symbol(Validator2._subscription, Decl(infinitelyExpandingOverloads.ts, 12, 26))
+>KnockoutSubscription2 : Symbol(KnockoutSubscription2, Decl(infinitelyExpandingOverloads.ts, 0, 0))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 12, 17))
+}
+class ViewModel<TValue> {
+>ViewModel : Symbol(ViewModel, Decl(infinitelyExpandingOverloads.ts, 14, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 15, 16))
+
+    public validationPlacements: Array<ValidationPlacement2<TValue>> = new Array<ValidationPlacement2<TValue>>();
+>validationPlacements : Symbol(ViewModel.validationPlacements, Decl(infinitelyExpandingOverloads.ts, 15, 25))
+>Array : Symbol(Array, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>ValidationPlacement2 : Symbol(ValidationPlacement2, Decl(infinitelyExpandingOverloads.ts, 5, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 15, 16))
+>Array : Symbol(Array, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>ValidationPlacement2 : Symbol(ValidationPlacement2, Decl(infinitelyExpandingOverloads.ts, 5, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 15, 16))
+}
+class Widget<TValue> {
+>Widget : Symbol(Widget, Decl(infinitelyExpandingOverloads.ts, 17, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 18, 13))
+
+    constructor(viewModelType: new () => ViewModel<TValue>); // Shouldnt error on this overload
+>viewModelType : Symbol(viewModelType, Decl(infinitelyExpandingOverloads.ts, 19, 16))
+>ViewModel : Symbol(ViewModel, Decl(infinitelyExpandingOverloads.ts, 14, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 18, 13))
+
+    constructor(viewModelType: new () => ViewModel<TValue>) {
+>viewModelType : Symbol(viewModelType, Decl(infinitelyExpandingOverloads.ts, 20, 16))
+>ViewModel : Symbol(ViewModel, Decl(infinitelyExpandingOverloads.ts, 14, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 18, 13))
+    }
+    public get options(): ViewModel<TValue> {
+>options : Symbol(Widget.options, Decl(infinitelyExpandingOverloads.ts, 21, 5))
+>ViewModel : Symbol(ViewModel, Decl(infinitelyExpandingOverloads.ts, 14, 1))
+>TValue : Symbol(TValue, Decl(infinitelyExpandingOverloads.ts, 18, 13))
+
+        return null;
+    }
+}
diff --git a/tests/baselines/reference/infinitelyExpandingOverloads.types b/tests/baselines/reference/infinitelyExpandingOverloads.types
new file mode 100644
index 0000000000000..b8e0706c13ade
--- /dev/null
+++ b/tests/baselines/reference/infinitelyExpandingOverloads.types
@@ -0,0 +1,90 @@
+=== tests/cases/compiler/infinitelyExpandingOverloads.ts ===
+interface KnockoutSubscription2<T> {
+>KnockoutSubscription2 : KnockoutSubscription2<T>
+>T : T
+
+    target: KnockoutObservableBase2<T>;
+>target : KnockoutObservableBase2<T>
+>KnockoutObservableBase2 : KnockoutObservableBase2<T>
+>T : T
+}
+interface KnockoutObservableBase2<T> {
+>KnockoutObservableBase2 : KnockoutObservableBase2<T>
+>T : T
+
+    subscribe(callback: (newValue: T) => void, target?: any, topic?: string): KnockoutSubscription2<T>;
+>subscribe : (callback: (newValue: T) => void, target?: any, topic?: string) => KnockoutSubscription2<T>
+>callback : (newValue: T) => void
+>newValue : T
+>T : T
+>target : any
+>topic : string
+>KnockoutSubscription2 : KnockoutSubscription2<T>
+>T : T
+}
+interface ValidationPlacement2<TValue> {
+>ValidationPlacement2 : ValidationPlacement2<TValue>
+>TValue : TValue
+
+    initialize(validatable: Validatable2<TValue>): void;
+>initialize : (validatable: Validatable2<TValue>) => void
+>validatable : Validatable2<TValue>
+>Validatable2 : Validatable2<TValue>
+>TValue : TValue
+}
+interface Validatable2<TValue> {
+>Validatable2 : Validatable2<TValue>
+>TValue : TValue
+
+    validators: KnockoutObservableBase2<Validator2<TValue>>;
+>validators : KnockoutObservableBase2<Validator2<TValue>>
+>KnockoutObservableBase2 : KnockoutObservableBase2<T>
+>Validator2 : Validator2<TValue>
+>TValue : TValue
+}
+class Validator2<TValue> {
+>Validator2 : Validator2<TValue>
+>TValue : TValue
+
+    private _subscription: KnockoutSubscription2<TValue>;
+>_subscription : KnockoutSubscription2<TValue>
+>KnockoutSubscription2 : KnockoutSubscription2<T>
+>TValue : TValue
+}
+class ViewModel<TValue> {
+>ViewModel : ViewModel<TValue>
+>TValue : TValue
+
+    public validationPlacements: Array<ValidationPlacement2<TValue>> = new Array<ValidationPlacement2<TValue>>();
+>validationPlacements : ValidationPlacement2<TValue>[]
+>Array : T[]
+>ValidationPlacement2 : ValidationPlacement2<TValue>
+>TValue : TValue
+>new Array<ValidationPlacement2<TValue>>() : ValidationPlacement2<TValue>[]
+>Array : ArrayConstructor
+>ValidationPlacement2 : ValidationPlacement2<TValue>
+>TValue : TValue
+}
+class Widget<TValue> {
+>Widget : Widget<TValue>
+>TValue : TValue
+
+    constructor(viewModelType: new () => ViewModel<TValue>); // Shouldnt error on this overload
+>viewModelType : new () => ViewModel<TValue>
+>ViewModel : ViewModel<TValue>
+>TValue : TValue
+
+    constructor(viewModelType: new () => ViewModel<TValue>) {
+>viewModelType : new () => ViewModel<TValue>
+>ViewModel : ViewModel<TValue>
+>TValue : TValue
+    }
+    public get options(): ViewModel<TValue> {
+>options : ViewModel<TValue>
+>ViewModel : ViewModel<TValue>
+>TValue : TValue
+
+        return null;
+>null : null
+    }
+}
diff --git a/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.errors.txt b/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.errors.txt
deleted file mode 100644
index f729e230ca2e4..0000000000000
--- a/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.errors.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(11,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts(14,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts (4 errors) ====
-    class a {
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return "20";
-        }
-        set x(aValue: string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        }
-    }
-    
-    class b extends a {
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return "20";
-        }
-        set x(aValue: string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.symbols b/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.symbols
new file mode 100644
index 0000000000000..5d3cca30196c5
--- /dev/null
+++ b/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.symbols
@@ -0,0 +1,31 @@
+=== tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts ===
+class a {
+>a : Symbol(a, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 0, 0))
+
+    get x() {
+>x : Symbol(a.x, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 0, 9), Decl(inheritanceMemberAccessorOverridingAccessor.ts, 3, 5))
+
+        return "20";
+    }
+    set x(aValue: string) {
+>x : Symbol(a.x, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 0, 9), Decl(inheritanceMemberAccessorOverridingAccessor.ts, 3, 5))
+>aValue : Symbol(aValue, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 4, 10))
+
+    }
+}
+
+class b extends a {
+>b : Symbol(b, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 7, 1))
+>a : Symbol(a, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 0, 0))
+
+    get x() {
+>x : Symbol(b.x, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 9, 19), Decl(inheritanceMemberAccessorOverridingAccessor.ts, 12, 5))
+
+        return "20";
+    }
+    set x(aValue: string) {
+>x : Symbol(b.x, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 9, 19), Decl(inheritanceMemberAccessorOverridingAccessor.ts, 12, 5))
+>aValue : Symbol(aValue, Decl(inheritanceMemberAccessorOverridingAccessor.ts, 13, 10))
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.types b/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.types
new file mode 100644
index 0000000000000..d5f7d43378700
--- /dev/null
+++ b/tests/baselines/reference/inheritanceMemberAccessorOverridingAccessor.types
@@ -0,0 +1,33 @@
+=== tests/cases/compiler/inheritanceMemberAccessorOverridingAccessor.ts ===
+class a {
+>a : a
+
+    get x() {
+>x : string
+
+        return "20";
+>"20" : "20"
+    }
+    set x(aValue: string) {
+>x : string
+>aValue : string
+
+    }
+}
+
+class b extends a {
+>b : b
+>a : a
+
+    get x() {
+>x : string
+
+        return "20";
+>"20" : "20"
+    }
+    set x(aValue: string) {
+>x : string
+>aValue : string
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceMemberAccessorOverridingMethod.errors.txt b/tests/baselines/reference/inheritanceMemberAccessorOverridingMethod.errors.txt
index 6fde83e08b03c..92fe22800f464 100644
--- a/tests/baselines/reference/inheritanceMemberAccessorOverridingMethod.errors.txt
+++ b/tests/baselines/reference/inheritanceMemberAccessorOverridingMethod.errors.txt
@@ -1,12 +1,10 @@
 tests/cases/compiler/inheritanceMemberAccessorOverridingMethod.ts(7,7): error TS2415: Class 'b' incorrectly extends base class 'a'.
   Types of property 'x' are incompatible.
     Type 'string' is not assignable to type '() => string'.
-tests/cases/compiler/inheritanceMemberAccessorOverridingMethod.ts(8,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/inheritanceMemberAccessorOverridingMethod.ts(8,9): error TS2423: Class 'a' defines instance member function 'x', but extended class 'b' defines it as instance member accessor.
-tests/cases/compiler/inheritanceMemberAccessorOverridingMethod.ts(11,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/inheritanceMemberAccessorOverridingMethod.ts (4 errors) ====
+==== tests/cases/compiler/inheritanceMemberAccessorOverridingMethod.ts (2 errors) ====
     class a {
         x() {
             return "20";
@@ -20,14 +18,10 @@ tests/cases/compiler/inheritanceMemberAccessorOverridingMethod.ts(11,9): error T
 !!! error TS2415:     Type 'string' is not assignable to type '() => string'.
         get x() {
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2423: Class 'a' defines instance member function 'x', but extended class 'b' defines it as instance member accessor.
             return "20";
         }
         set x(aValue: string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         }
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.errors.txt b/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.errors.txt
deleted file mode 100644
index 98b9d349d64fe..0000000000000
--- a/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.errors.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-tests/cases/compiler/inheritanceMemberAccessorOverridingProperty.ts(6,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceMemberAccessorOverridingProperty.ts(9,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/inheritanceMemberAccessorOverridingProperty.ts (2 errors) ====
-    class a {
-        x: string;
-    }
-    
-    class b extends a {
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return "20";
-        }
-        set x(aValue: string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.symbols b/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.symbols
new file mode 100644
index 0000000000000..f732a335e1dd5
--- /dev/null
+++ b/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.symbols
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/inheritanceMemberAccessorOverridingProperty.ts ===
+class a {
+>a : Symbol(a, Decl(inheritanceMemberAccessorOverridingProperty.ts, 0, 0))
+
+    x: string;
+>x : Symbol(a.x, Decl(inheritanceMemberAccessorOverridingProperty.ts, 0, 9))
+}
+
+class b extends a {
+>b : Symbol(b, Decl(inheritanceMemberAccessorOverridingProperty.ts, 2, 1))
+>a : Symbol(a, Decl(inheritanceMemberAccessorOverridingProperty.ts, 0, 0))
+
+    get x() {
+>x : Symbol(b.x, Decl(inheritanceMemberAccessorOverridingProperty.ts, 4, 19), Decl(inheritanceMemberAccessorOverridingProperty.ts, 7, 5))
+
+        return "20";
+    }
+    set x(aValue: string) {
+>x : Symbol(b.x, Decl(inheritanceMemberAccessorOverridingProperty.ts, 4, 19), Decl(inheritanceMemberAccessorOverridingProperty.ts, 7, 5))
+>aValue : Symbol(aValue, Decl(inheritanceMemberAccessorOverridingProperty.ts, 8, 10))
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.types b/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.types
new file mode 100644
index 0000000000000..e3ccbdd94f308
--- /dev/null
+++ b/tests/baselines/reference/inheritanceMemberAccessorOverridingProperty.types
@@ -0,0 +1,24 @@
+=== tests/cases/compiler/inheritanceMemberAccessorOverridingProperty.ts ===
+class a {
+>a : a
+
+    x: string;
+>x : string
+}
+
+class b extends a {
+>b : b
+>a : a
+
+    get x() {
+>x : string
+
+        return "20";
+>"20" : "20"
+    }
+    set x(aValue: string) {
+>x : string
+>aValue : string
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceMemberFuncOverridingAccessor.errors.txt b/tests/baselines/reference/inheritanceMemberFuncOverridingAccessor.errors.txt
index 283e7ce3f1849..f95595958f00e 100644
--- a/tests/baselines/reference/inheritanceMemberFuncOverridingAccessor.errors.txt
+++ b/tests/baselines/reference/inheritanceMemberFuncOverridingAccessor.errors.txt
@@ -1,21 +1,15 @@
-tests/cases/compiler/inheritanceMemberFuncOverridingAccessor.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceMemberFuncOverridingAccessor.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/inheritanceMemberFuncOverridingAccessor.ts(10,7): error TS2415: Class 'b' incorrectly extends base class 'a'.
   Types of property 'x' are incompatible.
     Type '() => string' is not assignable to type 'string'.
 tests/cases/compiler/inheritanceMemberFuncOverridingAccessor.ts(11,5): error TS2426: Class 'a' defines instance member accessor 'x', but extended class 'b' defines it as instance member function.
 
 
-==== tests/cases/compiler/inheritanceMemberFuncOverridingAccessor.ts (4 errors) ====
+==== tests/cases/compiler/inheritanceMemberFuncOverridingAccessor.ts (2 errors) ====
     class a {
         get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return "20";
         }
         set x(aValue: string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         }
     }
diff --git a/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.errors.txt b/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.errors.txt
deleted file mode 100644
index ec8ec05a8aeb5..0000000000000
--- a/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.errors.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-tests/cases/compiler/inheritanceMemberPropertyOverridingAccessor.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceMemberPropertyOverridingAccessor.ts(6,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/inheritanceMemberPropertyOverridingAccessor.ts (2 errors) ====
-    class a {
-        private __x: () => string;
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return this.__x;
-        }
-        set x(aValue: () => string) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            this.__x = aValue;
-        }
-    }
-    
-    class b extends a {
-        x: () => string;
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.symbols b/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.symbols
new file mode 100644
index 0000000000000..d3949e7efc589
--- /dev/null
+++ b/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.symbols
@@ -0,0 +1,34 @@
+=== tests/cases/compiler/inheritanceMemberPropertyOverridingAccessor.ts ===
+class a {
+>a : Symbol(a, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 0))
+
+    private __x: () => string;
+>__x : Symbol(a.__x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 9))
+
+    get x() {
+>x : Symbol(a.x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 1, 30), Decl(inheritanceMemberPropertyOverridingAccessor.ts, 4, 5))
+
+        return this.__x;
+>this.__x : Symbol(a.__x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 9))
+>this : Symbol(a, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 0))
+>__x : Symbol(a.__x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 9))
+    }
+    set x(aValue: () => string) {
+>x : Symbol(a.x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 1, 30), Decl(inheritanceMemberPropertyOverridingAccessor.ts, 4, 5))
+>aValue : Symbol(aValue, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 5, 10))
+
+        this.__x = aValue;
+>this.__x : Symbol(a.__x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 9))
+>this : Symbol(a, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 0))
+>__x : Symbol(a.__x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 9))
+>aValue : Symbol(aValue, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 5, 10))
+    }
+}
+
+class b extends a {
+>b : Symbol(b, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 8, 1))
+>a : Symbol(a, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 0, 0))
+
+    x: () => string;
+>x : Symbol(b.x, Decl(inheritanceMemberPropertyOverridingAccessor.ts, 10, 19))
+}
diff --git a/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.types b/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.types
new file mode 100644
index 0000000000000..b843799a8cb08
--- /dev/null
+++ b/tests/baselines/reference/inheritanceMemberPropertyOverridingAccessor.types
@@ -0,0 +1,35 @@
+=== tests/cases/compiler/inheritanceMemberPropertyOverridingAccessor.ts ===
+class a {
+>a : a
+
+    private __x: () => string;
+>__x : () => string
+
+    get x() {
+>x : () => string
+
+        return this.__x;
+>this.__x : () => string
+>this : this
+>__x : () => string
+    }
+    set x(aValue: () => string) {
+>x : () => string
+>aValue : () => string
+
+        this.__x = aValue;
+>this.__x = aValue : () => string
+>this.__x : () => string
+>this : this
+>__x : () => string
+>aValue : () => string
+    }
+}
+
+class b extends a {
+>b : b
+>a : a
+
+    x: () => string;
+>x : () => string
+}
diff --git a/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.errors.txt b/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.errors.txt
deleted file mode 100644
index ae6a19c4530c8..0000000000000
--- a/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.errors.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-tests/cases/compiler/inheritanceStaticAccessorOverridingAccessor.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceStaticAccessorOverridingAccessor.ts(5,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceStaticAccessorOverridingAccessor.ts(11,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceStaticAccessorOverridingAccessor.ts(14,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/inheritanceStaticAccessorOverridingAccessor.ts (4 errors) ====
-    class a {
-        static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return "20";
-        }
-        static set x(aValue: string) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        }
-    }
-    
-    class b extends a {
-        static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return "20";
-        }
-        static set x(aValue: string) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.symbols b/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.symbols
new file mode 100644
index 0000000000000..e5e97389b4622
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.symbols
@@ -0,0 +1,31 @@
+=== tests/cases/compiler/inheritanceStaticAccessorOverridingAccessor.ts ===
+class a {
+>a : Symbol(a, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 0, 0))
+
+    static get x() {
+>x : Symbol(a.x, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 0, 9), Decl(inheritanceStaticAccessorOverridingAccessor.ts, 3, 5))
+
+        return "20";
+    }
+    static set x(aValue: string) {
+>x : Symbol(a.x, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 0, 9), Decl(inheritanceStaticAccessorOverridingAccessor.ts, 3, 5))
+>aValue : Symbol(aValue, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 4, 17))
+
+    }
+}
+
+class b extends a {
+>b : Symbol(b, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 7, 1))
+>a : Symbol(a, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 0, 0))
+
+    static get x() {
+>x : Symbol(b.x, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 9, 19), Decl(inheritanceStaticAccessorOverridingAccessor.ts, 12, 5))
+
+        return "20";
+    }
+    static set x(aValue: string) {
+>x : Symbol(b.x, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 9, 19), Decl(inheritanceStaticAccessorOverridingAccessor.ts, 12, 5))
+>aValue : Symbol(aValue, Decl(inheritanceStaticAccessorOverridingAccessor.ts, 13, 17))
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.types b/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.types
new file mode 100644
index 0000000000000..e484eb0932e00
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticAccessorOverridingAccessor.types
@@ -0,0 +1,33 @@
+=== tests/cases/compiler/inheritanceStaticAccessorOverridingAccessor.ts ===
+class a {
+>a : a
+
+    static get x() {
+>x : string
+
+        return "20";
+>"20" : "20"
+    }
+    static set x(aValue: string) {
+>x : string
+>aValue : string
+
+    }
+}
+
+class b extends a {
+>b : b
+>a : a
+
+    static get x() {
+>x : string
+
+        return "20";
+>"20" : "20"
+    }
+    static set x(aValue: string) {
+>x : string
+>aValue : string
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceStaticAccessorOverridingMethod.errors.txt b/tests/baselines/reference/inheritanceStaticAccessorOverridingMethod.errors.txt
index 38b1ed61facfa..04459972b8be9 100644
--- a/tests/baselines/reference/inheritanceStaticAccessorOverridingMethod.errors.txt
+++ b/tests/baselines/reference/inheritanceStaticAccessorOverridingMethod.errors.txt
@@ -1,11 +1,9 @@
 tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts(7,7): error TS2417: Class static side 'typeof b' incorrectly extends base class static side 'typeof a'.
   Types of property 'x' are incompatible.
     Type 'string' is not assignable to type '() => string'.
-tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts(8,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts(11,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts (3 errors) ====
+==== tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts (1 errors) ====
     class a {
         static x() {
             return "20";
@@ -18,13 +16,9 @@ tests/cases/compiler/inheritanceStaticAccessorOverridingMethod.ts(11,16): error
 !!! error TS2417:   Types of property 'x' are incompatible.
 !!! error TS2417:     Type 'string' is not assignable to type '() => string'.
         static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return "20";
         }
         static set x(aValue: string) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         }
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.errors.txt b/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.errors.txt
deleted file mode 100644
index cdcbaa101e701..0000000000000
--- a/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.errors.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-tests/cases/compiler/inheritanceStaticAccessorOverridingProperty.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceStaticAccessorOverridingProperty.ts(9,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/inheritanceStaticAccessorOverridingProperty.ts (2 errors) ====
-    class a {
-        static x: string;
-    }
-    
-    class b extends a {
-        static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return "20";
-        }
-        static set x(aValue: string) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.symbols b/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.symbols
new file mode 100644
index 0000000000000..09c5fbe9e72f7
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.symbols
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/inheritanceStaticAccessorOverridingProperty.ts ===
+class a {
+>a : Symbol(a, Decl(inheritanceStaticAccessorOverridingProperty.ts, 0, 0))
+
+    static x: string;
+>x : Symbol(a.x, Decl(inheritanceStaticAccessorOverridingProperty.ts, 0, 9))
+}
+
+class b extends a {
+>b : Symbol(b, Decl(inheritanceStaticAccessorOverridingProperty.ts, 2, 1))
+>a : Symbol(a, Decl(inheritanceStaticAccessorOverridingProperty.ts, 0, 0))
+
+    static get x() {
+>x : Symbol(b.x, Decl(inheritanceStaticAccessorOverridingProperty.ts, 4, 19), Decl(inheritanceStaticAccessorOverridingProperty.ts, 7, 5))
+
+        return "20";
+    }
+    static set x(aValue: string) {
+>x : Symbol(b.x, Decl(inheritanceStaticAccessorOverridingProperty.ts, 4, 19), Decl(inheritanceStaticAccessorOverridingProperty.ts, 7, 5))
+>aValue : Symbol(aValue, Decl(inheritanceStaticAccessorOverridingProperty.ts, 8, 17))
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.types b/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.types
new file mode 100644
index 0000000000000..f1d4c07bbee66
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticAccessorOverridingProperty.types
@@ -0,0 +1,24 @@
+=== tests/cases/compiler/inheritanceStaticAccessorOverridingProperty.ts ===
+class a {
+>a : a
+
+    static x: string;
+>x : string
+}
+
+class b extends a {
+>b : b
+>a : a
+
+    static get x() {
+>x : string
+
+        return "20";
+>"20" : "20"
+    }
+    static set x(aValue: string) {
+>x : string
+>aValue : string
+
+    }
+}
diff --git a/tests/baselines/reference/inheritanceStaticFuncOverridingAccessor.errors.txt b/tests/baselines/reference/inheritanceStaticFuncOverridingAccessor.errors.txt
index cfe05da8ea49e..467899c0de472 100644
--- a/tests/baselines/reference/inheritanceStaticFuncOverridingAccessor.errors.txt
+++ b/tests/baselines/reference/inheritanceStaticFuncOverridingAccessor.errors.txt
@@ -1,20 +1,14 @@
-tests/cases/compiler/inheritanceStaticFuncOverridingAccessor.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceStaticFuncOverridingAccessor.ts(5,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/inheritanceStaticFuncOverridingAccessor.ts(10,7): error TS2417: Class static side 'typeof b' incorrectly extends base class static side 'typeof a'.
   Types of property 'x' are incompatible.
     Type '() => string' is not assignable to type 'string'.
 
 
-==== tests/cases/compiler/inheritanceStaticFuncOverridingAccessor.ts (3 errors) ====
+==== tests/cases/compiler/inheritanceStaticFuncOverridingAccessor.ts (1 errors) ====
     class a {
         static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return "20";
         }
         static set x(aValue: string) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         }
     }
diff --git a/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.errors.txt b/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.errors.txt
deleted file mode 100644
index 1fa828f30c4f8..0000000000000
--- a/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.errors.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-tests/cases/compiler/inheritanceStaticFuncOverridingAccessorOfFuncType.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/inheritanceStaticFuncOverridingAccessorOfFuncType.ts (1 errors) ====
-    class a {
-        static get x(): () => string {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return null;
-        }
-    }
-    
-    class b extends a {
-        static x() {
-            return "20";
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.symbols b/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.symbols
new file mode 100644
index 0000000000000..4494110ca3e9a
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.symbols
@@ -0,0 +1,21 @@
+=== tests/cases/compiler/inheritanceStaticFuncOverridingAccessorOfFuncType.ts ===
+class a {
+>a : Symbol(a, Decl(inheritanceStaticFuncOverridingAccessorOfFuncType.ts, 0, 0))
+
+    static get x(): () => string {
+>x : Symbol(a.x, Decl(inheritanceStaticFuncOverridingAccessorOfFuncType.ts, 0, 9))
+
+        return null;
+    }
+}
+
+class b extends a {
+>b : Symbol(b, Decl(inheritanceStaticFuncOverridingAccessorOfFuncType.ts, 4, 1))
+>a : Symbol(a, Decl(inheritanceStaticFuncOverridingAccessorOfFuncType.ts, 0, 0))
+
+    static x() {
+>x : Symbol(b.x, Decl(inheritanceStaticFuncOverridingAccessorOfFuncType.ts, 6, 19))
+
+        return "20";
+    }
+}
diff --git a/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.types b/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.types
new file mode 100644
index 0000000000000..a1119d1193f6f
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticFuncOverridingAccessorOfFuncType.types
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/inheritanceStaticFuncOverridingAccessorOfFuncType.ts ===
+class a {
+>a : a
+
+    static get x(): () => string {
+>x : () => string
+
+        return null;
+>null : null
+    }
+}
+
+class b extends a {
+>b : b
+>a : a
+
+    static x() {
+>x : () => string
+
+        return "20";
+>"20" : "20"
+    }
+}
diff --git a/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.errors.txt b/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.errors.txt
deleted file mode 100644
index 08aab5b1158c5..0000000000000
--- a/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.errors.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-tests/cases/compiler/inheritanceStaticPropertyOverridingAccessor.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/inheritanceStaticPropertyOverridingAccessor.ts(5,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/inheritanceStaticPropertyOverridingAccessor.ts (2 errors) ====
-    class a {
-        static get x(): () => string {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return null;;
-        }
-        static set x(aValue: () => string) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        }
-    }
-    
-    class b extends a {
-        static x: () => string;
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.symbols b/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.symbols
new file mode 100644
index 0000000000000..519077b311da3
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.symbols
@@ -0,0 +1,22 @@
+=== tests/cases/compiler/inheritanceStaticPropertyOverridingAccessor.ts ===
+class a {
+>a : Symbol(a, Decl(inheritanceStaticPropertyOverridingAccessor.ts, 0, 0))
+
+    static get x(): () => string {
+>x : Symbol(a.x, Decl(inheritanceStaticPropertyOverridingAccessor.ts, 0, 9), Decl(inheritanceStaticPropertyOverridingAccessor.ts, 3, 5))
+
+        return null;;
+    }
+    static set x(aValue: () => string) {
+>x : Symbol(a.x, Decl(inheritanceStaticPropertyOverridingAccessor.ts, 0, 9), Decl(inheritanceStaticPropertyOverridingAccessor.ts, 3, 5))
+>aValue : Symbol(aValue, Decl(inheritanceStaticPropertyOverridingAccessor.ts, 4, 17))
+    }
+}
+
+class b extends a {
+>b : Symbol(b, Decl(inheritanceStaticPropertyOverridingAccessor.ts, 6, 1))
+>a : Symbol(a, Decl(inheritanceStaticPropertyOverridingAccessor.ts, 0, 0))
+
+    static x: () => string;
+>x : Symbol(b.x, Decl(inheritanceStaticPropertyOverridingAccessor.ts, 8, 19))
+}
diff --git a/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.types b/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.types
new file mode 100644
index 0000000000000..3bce5e7250c87
--- /dev/null
+++ b/tests/baselines/reference/inheritanceStaticPropertyOverridingAccessor.types
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/inheritanceStaticPropertyOverridingAccessor.ts ===
+class a {
+>a : a
+
+    static get x(): () => string {
+>x : () => string
+
+        return null;;
+>null : null
+    }
+    static set x(aValue: () => string) {
+>x : () => string
+>aValue : () => string
+    }
+}
+
+class b extends a {
+>b : b
+>a : a
+
+    static x: () => string;
+>x : () => string
+}
diff --git a/tests/baselines/reference/instanceOfInExternalModules.js b/tests/baselines/reference/instanceOfInExternalModules.js
index 293be662a4d74..d5fd52f13c1ce 100644
--- a/tests/baselines/reference/instanceOfInExternalModules.js
+++ b/tests/baselines/reference/instanceOfInExternalModules.js
@@ -14,7 +14,7 @@ function IsFoo(value: any): boolean {
 //// [instanceOfInExternalModules_require.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = (function () {
         function Foo() {
         }
@@ -25,7 +25,7 @@ define(["require", "exports"], function (require, exports) {
 //// [instanceOfInExternalModules_1.js]
 define(["require", "exports", "instanceOfInExternalModules_require"], function (require, exports, Bar) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function IsFoo(value) {
         return value instanceof Bar.Foo;
     }
diff --git a/tests/baselines/reference/instancePropertiesInheritedIntoClassType.errors.txt b/tests/baselines/reference/instancePropertiesInheritedIntoClassType.errors.txt
index 21aaa938093e1..99ba96c825236 100644
--- a/tests/baselines/reference/instancePropertiesInheritedIntoClassType.errors.txt
+++ b/tests/baselines/reference/instancePropertiesInheritedIntoClassType.errors.txt
@@ -1,23 +1,15 @@
-tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts(4,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts(7,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts(19,14): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'Number' has no compatible call signatures.
-tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts(26,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts(29,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts(41,14): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
 
 
-==== tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts (6 errors) ====
+==== tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIntoClassType.ts (2 errors) ====
     module NonGeneric {
         class C {
             x: string;
             get y() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                 return 1;
             }
             set y(v) { }
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             fn() { return this; }
             constructor(public a: number, private b: number) { }
         }
@@ -39,13 +31,9 @@ tests/cases/conformance/classes/members/classTypes/instancePropertiesInheritedIn
         class C<T, U> {
             x: T;
             get y() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                 return null;
             }
             set y(v: U) { }
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             fn() { return this; }
             constructor(public a: T, private b: U) { }
         }
diff --git a/tests/baselines/reference/instancePropertyInClassType.errors.txt b/tests/baselines/reference/instancePropertyInClassType.errors.txt
index bb0047880cbd8..5fd2da807055b 100644
--- a/tests/baselines/reference/instancePropertyInClassType.errors.txt
+++ b/tests/baselines/reference/instancePropertyInClassType.errors.txt
@@ -1,23 +1,15 @@
-tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts(4,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts(7,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts(17,14): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'Number' has no compatible call signatures.
-tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts(24,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts(27,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts(37,14): error TS2349: Cannot invoke an expression whose type lacks a call signature. Type 'String' has no compatible call signatures.
 
 
-==== tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts (6 errors) ====
+==== tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.ts (2 errors) ====
     module NonGeneric {
         class C {
             x: string;
             get y() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                 return 1;
             }
             set y(v) { }
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             fn() { return this; }
             constructor(public a: number, private b: number) { }
         }
@@ -37,13 +29,9 @@ tests/cases/conformance/classes/members/classTypes/instancePropertyInClassType.t
         class C<T,U> {
             x: T;
             get y() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                 return null;
             }
             set y(v: U) { }
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             fn() { return this; }
             constructor(public a: T, private b: U) { }
         }
diff --git a/tests/baselines/reference/interfaceContextualType.js b/tests/baselines/reference/interfaceContextualType.js
index ec50272592509..7b7dc3b776dc7 100644
--- a/tests/baselines/reference/interfaceContextualType.js
+++ b/tests/baselines/reference/interfaceContextualType.js
@@ -23,7 +23,7 @@ class Bug {
 
 //// [interfaceContextualType.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Bug = (function () {
     function Bug() {
     }
diff --git a/tests/baselines/reference/interfaceDeclaration3.js b/tests/baselines/reference/interfaceDeclaration3.js
index 41f12dbac05b1..ca1a01de1b46f 100644
--- a/tests/baselines/reference/interfaceDeclaration3.js
+++ b/tests/baselines/reference/interfaceDeclaration3.js
@@ -58,7 +58,7 @@ interface I2 extends I1 { item:string; }
 //// [interfaceDeclaration3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var M1;
     (function (M1) {
         var C1 = (function () {
diff --git a/tests/baselines/reference/interfaceDeclaration5.js b/tests/baselines/reference/interfaceDeclaration5.js
index 318e8903c36f0..1875c80562c94 100644
--- a/tests/baselines/reference/interfaceDeclaration5.js
+++ b/tests/baselines/reference/interfaceDeclaration5.js
@@ -6,7 +6,7 @@ export class C1 { }
 //// [interfaceDeclaration5.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C1 = (function () {
         function C1() {
         }
diff --git a/tests/baselines/reference/interfaceExtendingClass.errors.txt b/tests/baselines/reference/interfaceExtendingClass.errors.txt
deleted file mode 100644
index 66a75a1c998ce..0000000000000
--- a/tests/baselines/reference/interfaceExtendingClass.errors.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass.ts(4,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass.ts (1 errors) ====
-    class Foo {
-        x: string;
-        y() { }
-        get Z() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return 1;
-        }
-        [x: string]: Object;
-    }
-    
-    interface I extends Foo {
-    }
-    
-    var i: I;
-    var r1 = i.x;
-    var r2 = i.y();
-    var r3 = i.Z;
-    
-    var f: Foo = i;
-    i = f;
\ No newline at end of file
diff --git a/tests/baselines/reference/interfaceExtendingClass.symbols b/tests/baselines/reference/interfaceExtendingClass.symbols
new file mode 100644
index 0000000000000..2adff6a9a0355
--- /dev/null
+++ b/tests/baselines/reference/interfaceExtendingClass.symbols
@@ -0,0 +1,56 @@
+=== tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass.ts ===
+class Foo {
+>Foo : Symbol(Foo, Decl(interfaceExtendingClass.ts, 0, 0))
+
+    x: string;
+>x : Symbol(Foo.x, Decl(interfaceExtendingClass.ts, 0, 11))
+
+    y() { }
+>y : Symbol(Foo.y, Decl(interfaceExtendingClass.ts, 1, 14))
+
+    get Z() {
+>Z : Symbol(Foo.Z, Decl(interfaceExtendingClass.ts, 2, 11))
+
+        return 1;
+    }
+    [x: string]: Object;
+>x : Symbol(x, Decl(interfaceExtendingClass.ts, 6, 5))
+>Object : Symbol(Object, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+}
+
+interface I extends Foo {
+>I : Symbol(I, Decl(interfaceExtendingClass.ts, 7, 1))
+>Foo : Symbol(Foo, Decl(interfaceExtendingClass.ts, 0, 0))
+}
+
+var i: I;
+>i : Symbol(i, Decl(interfaceExtendingClass.ts, 12, 3))
+>I : Symbol(I, Decl(interfaceExtendingClass.ts, 7, 1))
+
+var r1 = i.x;
+>r1 : Symbol(r1, Decl(interfaceExtendingClass.ts, 13, 3))
+>i.x : Symbol(Foo.x, Decl(interfaceExtendingClass.ts, 0, 11))
+>i : Symbol(i, Decl(interfaceExtendingClass.ts, 12, 3))
+>x : Symbol(Foo.x, Decl(interfaceExtendingClass.ts, 0, 11))
+
+var r2 = i.y();
+>r2 : Symbol(r2, Decl(interfaceExtendingClass.ts, 14, 3))
+>i.y : Symbol(Foo.y, Decl(interfaceExtendingClass.ts, 1, 14))
+>i : Symbol(i, Decl(interfaceExtendingClass.ts, 12, 3))
+>y : Symbol(Foo.y, Decl(interfaceExtendingClass.ts, 1, 14))
+
+var r3 = i.Z;
+>r3 : Symbol(r3, Decl(interfaceExtendingClass.ts, 15, 3))
+>i.Z : Symbol(Foo.Z, Decl(interfaceExtendingClass.ts, 2, 11))
+>i : Symbol(i, Decl(interfaceExtendingClass.ts, 12, 3))
+>Z : Symbol(Foo.Z, Decl(interfaceExtendingClass.ts, 2, 11))
+
+var f: Foo = i;
+>f : Symbol(f, Decl(interfaceExtendingClass.ts, 17, 3))
+>Foo : Symbol(Foo, Decl(interfaceExtendingClass.ts, 0, 0))
+>i : Symbol(i, Decl(interfaceExtendingClass.ts, 12, 3))
+
+i = f;
+>i : Symbol(i, Decl(interfaceExtendingClass.ts, 12, 3))
+>f : Symbol(f, Decl(interfaceExtendingClass.ts, 17, 3))
+
diff --git a/tests/baselines/reference/interfaceExtendingClass.types b/tests/baselines/reference/interfaceExtendingClass.types
new file mode 100644
index 0000000000000..db7e920265d9c
--- /dev/null
+++ b/tests/baselines/reference/interfaceExtendingClass.types
@@ -0,0 +1,59 @@
+=== tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass.ts ===
+class Foo {
+>Foo : Foo
+
+    x: string;
+>x : string
+
+    y() { }
+>y : () => void
+
+    get Z() {
+>Z : number
+
+        return 1;
+>1 : 1
+    }
+    [x: string]: Object;
+>x : string
+>Object : Object
+}
+
+interface I extends Foo {
+>I : I
+>Foo : Foo
+}
+
+var i: I;
+>i : I
+>I : I
+
+var r1 = i.x;
+>r1 : string
+>i.x : string
+>i : I
+>x : string
+
+var r2 = i.y();
+>r2 : void
+>i.y() : void
+>i.y : () => void
+>i : I
+>y : () => void
+
+var r3 = i.Z;
+>r3 : number
+>i.Z : number
+>i : I
+>Z : number
+
+var f: Foo = i;
+>f : Foo
+>Foo : Foo
+>i : I
+
+i = f;
+>i = f : Foo
+>i : I
+>f : Foo
+
diff --git a/tests/baselines/reference/interfaceImplementation5.errors.txt b/tests/baselines/reference/interfaceImplementation5.errors.txt
deleted file mode 100644
index 882d851612183..0000000000000
--- a/tests/baselines/reference/interfaceImplementation5.errors.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-tests/cases/compiler/interfaceImplementation5.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/interfaceImplementation5.ts(10,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/interfaceImplementation5.ts(14,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/interfaceImplementation5.ts(15,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/interfaceImplementation5.ts(19,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/interfaceImplementation5.ts(23,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/interfaceImplementation5.ts(27,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/interfaceImplementation5.ts(28,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/interfaceImplementation5.ts (8 errors) ====
-    interface I1 {
-        getset1:number;
-    }
-    
-    class C1 implements I1 {
-        public get getset1(){return 1;}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    class C2 implements I1 {
-        public set getset1(baz:number){}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    class C3 implements I1 {
-        public get getset1(){return 1;}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public set getset1(baz:number){}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    class C4 implements I1 {
-        public get getset1(){var x:any; return x;}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    class C5 implements I1 {
-        public set getset1(baz:any){}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    class C6 implements I1 {
-        public set getset1(baz:any){}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        public get getset1(){var x:any; return x;}
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/interfaceImplementation5.symbols b/tests/baselines/reference/interfaceImplementation5.symbols
new file mode 100644
index 0000000000000..8d2663a896bb2
--- /dev/null
+++ b/tests/baselines/reference/interfaceImplementation5.symbols
@@ -0,0 +1,71 @@
+=== tests/cases/compiler/interfaceImplementation5.ts ===
+interface I1 {
+>I1 : Symbol(I1, Decl(interfaceImplementation5.ts, 0, 0))
+
+    getset1:number;
+>getset1 : Symbol(I1.getset1, Decl(interfaceImplementation5.ts, 0, 14))
+}
+
+class C1 implements I1 {
+>C1 : Symbol(C1, Decl(interfaceImplementation5.ts, 2, 1))
+>I1 : Symbol(I1, Decl(interfaceImplementation5.ts, 0, 0))
+
+    public get getset1(){return 1;}
+>getset1 : Symbol(C1.getset1, Decl(interfaceImplementation5.ts, 4, 24))
+}
+
+class C2 implements I1 {
+>C2 : Symbol(C2, Decl(interfaceImplementation5.ts, 6, 1))
+>I1 : Symbol(I1, Decl(interfaceImplementation5.ts, 0, 0))
+
+    public set getset1(baz:number){}
+>getset1 : Symbol(C2.getset1, Decl(interfaceImplementation5.ts, 8, 24))
+>baz : Symbol(baz, Decl(interfaceImplementation5.ts, 9, 23))
+}
+
+class C3 implements I1 {
+>C3 : Symbol(C3, Decl(interfaceImplementation5.ts, 10, 1))
+>I1 : Symbol(I1, Decl(interfaceImplementation5.ts, 0, 0))
+
+    public get getset1(){return 1;}
+>getset1 : Symbol(C3.getset1, Decl(interfaceImplementation5.ts, 12, 24), Decl(interfaceImplementation5.ts, 13, 35))
+
+    public set getset1(baz:number){}
+>getset1 : Symbol(C3.getset1, Decl(interfaceImplementation5.ts, 12, 24), Decl(interfaceImplementation5.ts, 13, 35))
+>baz : Symbol(baz, Decl(interfaceImplementation5.ts, 14, 23))
+}
+
+class C4 implements I1 {
+>C4 : Symbol(C4, Decl(interfaceImplementation5.ts, 15, 1))
+>I1 : Symbol(I1, Decl(interfaceImplementation5.ts, 0, 0))
+
+    public get getset1(){var x:any; return x;}
+>getset1 : Symbol(C4.getset1, Decl(interfaceImplementation5.ts, 17, 24))
+>x : Symbol(x, Decl(interfaceImplementation5.ts, 18, 28))
+>x : Symbol(x, Decl(interfaceImplementation5.ts, 18, 28))
+}
+
+class C5 implements I1 {
+>C5 : Symbol(C5, Decl(interfaceImplementation5.ts, 19, 1))
+>I1 : Symbol(I1, Decl(interfaceImplementation5.ts, 0, 0))
+
+    public set getset1(baz:any){}
+>getset1 : Symbol(C5.getset1, Decl(interfaceImplementation5.ts, 21, 24))
+>baz : Symbol(baz, Decl(interfaceImplementation5.ts, 22, 23))
+}
+
+class C6 implements I1 {
+>C6 : Symbol(C6, Decl(interfaceImplementation5.ts, 23, 1))
+>I1 : Symbol(I1, Decl(interfaceImplementation5.ts, 0, 0))
+
+    public set getset1(baz:any){}
+>getset1 : Symbol(C6.getset1, Decl(interfaceImplementation5.ts, 25, 24), Decl(interfaceImplementation5.ts, 26, 33))
+>baz : Symbol(baz, Decl(interfaceImplementation5.ts, 26, 23))
+
+    public get getset1(){var x:any; return x;}
+>getset1 : Symbol(C6.getset1, Decl(interfaceImplementation5.ts, 25, 24), Decl(interfaceImplementation5.ts, 26, 33))
+>x : Symbol(x, Decl(interfaceImplementation5.ts, 27, 28))
+>x : Symbol(x, Decl(interfaceImplementation5.ts, 27, 28))
+}
+
+
diff --git a/tests/baselines/reference/interfaceImplementation5.types b/tests/baselines/reference/interfaceImplementation5.types
new file mode 100644
index 0000000000000..292e0f7a474b5
--- /dev/null
+++ b/tests/baselines/reference/interfaceImplementation5.types
@@ -0,0 +1,73 @@
+=== tests/cases/compiler/interfaceImplementation5.ts ===
+interface I1 {
+>I1 : I1
+
+    getset1:number;
+>getset1 : number
+}
+
+class C1 implements I1 {
+>C1 : C1
+>I1 : I1
+
+    public get getset1(){return 1;}
+>getset1 : number
+>1 : 1
+}
+
+class C2 implements I1 {
+>C2 : C2
+>I1 : I1
+
+    public set getset1(baz:number){}
+>getset1 : number
+>baz : number
+}
+
+class C3 implements I1 {
+>C3 : C3
+>I1 : I1
+
+    public get getset1(){return 1;}
+>getset1 : number
+>1 : 1
+
+    public set getset1(baz:number){}
+>getset1 : number
+>baz : number
+}
+
+class C4 implements I1 {
+>C4 : C4
+>I1 : I1
+
+    public get getset1(){var x:any; return x;}
+>getset1 : any
+>x : any
+>x : any
+}
+
+class C5 implements I1 {
+>C5 : C5
+>I1 : I1
+
+    public set getset1(baz:any){}
+>getset1 : any
+>baz : any
+}
+
+class C6 implements I1 {
+>C6 : C6
+>I1 : I1
+
+    public set getset1(baz:any){}
+>getset1 : any
+>baz : any
+
+    public get getset1(){var x:any; return x;}
+>getset1 : any
+>x : any
+>x : any
+}
+
+
diff --git a/tests/baselines/reference/interfaceImplementation6.js b/tests/baselines/reference/interfaceImplementation6.js
index 0bc759f6cda86..5401664e92d51 100644
--- a/tests/baselines/reference/interfaceImplementation6.js
+++ b/tests/baselines/reference/interfaceImplementation6.js
@@ -27,7 +27,7 @@ export class Test {
 //// [interfaceImplementation6.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C1 = (function () {
         function C1() {
         }
diff --git a/tests/baselines/reference/internalAliasClassInsideLocalModuleWithExport.js b/tests/baselines/reference/internalAliasClassInsideLocalModuleWithExport.js
index 0b333ac1830a1..89bca20f659b1 100644
--- a/tests/baselines/reference/internalAliasClassInsideLocalModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasClassInsideLocalModuleWithExport.js
@@ -19,7 +19,7 @@ export var d = new m2.m3.c();
 
 //// [internalAliasClassInsideLocalModuleWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 (function (x) {
     var c = (function () {
diff --git a/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExport.js b/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExport.js
index cf2eb41662b56..3166032445b49 100644
--- a/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExport.js
@@ -17,7 +17,7 @@ export module m2 {
 
 //// [internalAliasClassInsideLocalModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 (function (x) {
     var c = (function () {
diff --git a/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExportAccessError.js b/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExportAccessError.js
index 1de7fe25407fb..f8e580d39fe5a 100644
--- a/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExportAccessError.js
+++ b/tests/baselines/reference/internalAliasClassInsideLocalModuleWithoutExportAccessError.js
@@ -19,7 +19,7 @@ export var d = new m2.m3.c();
 
 //// [internalAliasClassInsideLocalModuleWithoutExportAccessError.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 (function (x) {
     var c = (function () {
diff --git a/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithExport.js b/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithExport.js
index e224b40c9f320..f8bc96a95f0b7 100644
--- a/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithExport.js
@@ -13,7 +13,7 @@ var cReturnVal = cProp.foo(10);
 
 //// [internalAliasClassInsideTopLevelModuleWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 (function (x) {
     var c = (function () {
diff --git a/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithoutExport.js b/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithoutExport.js
index 16f53fe3e8b0e..c35a65ac69b6e 100644
--- a/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasClassInsideTopLevelModuleWithoutExport.js
@@ -13,7 +13,7 @@ var cReturnVal = cProp.foo(10);
 
 //// [internalAliasClassInsideTopLevelModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 (function (x) {
     var c = (function () {
diff --git a/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithExport.js b/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithExport.js
index c387fa6e2c415..613775d8dcde3 100644
--- a/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithExport.js
@@ -15,7 +15,7 @@ export module c {
 
 //// [internalAliasEnumInsideLocalModuleWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     var weekend;
diff --git a/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExport.js b/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExport.js
index 717652283cf96..ae3252c4b960d 100644
--- a/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExport.js
@@ -15,7 +15,7 @@ export module c {
 
 //// [internalAliasEnumInsideLocalModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     var weekend;
diff --git a/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExportAccessError.js b/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExportAccessError.js
index a84ebf0b9aded..1b4f376cb55db 100644
--- a/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExportAccessError.js
+++ b/tests/baselines/reference/internalAliasEnumInsideLocalModuleWithoutExportAccessError.js
@@ -16,7 +16,7 @@ var happyFriday = c.b.Friday;
 
 //// [internalAliasEnumInsideLocalModuleWithoutExportAccessError.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     var weekend;
diff --git a/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithExport.js b/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithExport.js
index ad07b9bd33f1c..1d0bca3854f17 100644
--- a/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithExport.js
@@ -14,7 +14,7 @@ export var bVal: b = b.Sunday;
 //// [internalAliasEnumInsideTopLevelModuleWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         var weekend;
diff --git a/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithoutExport.js b/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithoutExport.js
index 6b5f5b17a26de..701b94167c56e 100644
--- a/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasEnumInsideTopLevelModuleWithoutExport.js
@@ -14,7 +14,7 @@ export var bVal: b = b.Sunday;
 //// [internalAliasEnumInsideTopLevelModuleWithoutExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         var weekend;
diff --git a/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithExport.js b/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithExport.js
index 95bb936bc75e2..c9f309b4bfef5 100644
--- a/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithExport.js
@@ -14,7 +14,7 @@ export module c {
 
 //// [internalAliasFunctionInsideLocalModuleWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     function foo(x) {
diff --git a/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExport.js b/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExport.js
index 50de6b470ee4c..f31373983db0e 100644
--- a/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExport.js
@@ -14,7 +14,7 @@ export module c {
 
 //// [internalAliasFunctionInsideLocalModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     function foo(x) {
diff --git a/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExportAccessError.js b/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExportAccessError.js
index 543e9952f235a..f86fa09c18435 100644
--- a/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExportAccessError.js
+++ b/tests/baselines/reference/internalAliasFunctionInsideLocalModuleWithoutExportAccessError.js
@@ -14,7 +14,7 @@ var d = c.b(11);
 
 //// [internalAliasFunctionInsideLocalModuleWithoutExportAccessError.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     function foo(x) {
diff --git a/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithExport.js b/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithExport.js
index 267045b625d5d..8416fae0724f6 100644
--- a/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithExport.js
@@ -13,7 +13,7 @@ export var bVal2 = b;
 //// [internalAliasFunctionInsideTopLevelModuleWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         function foo(x) {
diff --git a/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithoutExport.js b/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithoutExport.js
index bb3b0e244d2fa..2cf4eff0795b8 100644
--- a/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasFunctionInsideTopLevelModuleWithoutExport.js
@@ -12,7 +12,7 @@ export var bVal2 = b;
 
 //// [internalAliasFunctionInsideTopLevelModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     function foo(x) {
diff --git a/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithExport.js b/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithExport.js
index 85335a0fb7f65..de96d66645531 100644
--- a/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithExport.js
@@ -14,7 +14,7 @@ export module c {
 //// [internalAliasInitializedModuleInsideLocalModuleWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         var b;
diff --git a/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExport.js b/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExport.js
index c39e6cfd16848..0a42955d9633e 100644
--- a/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExport.js
@@ -13,7 +13,7 @@ export module c {
 
 //// [internalAliasInitializedModuleInsideLocalModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     var b;
diff --git a/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExportAccessError.js b/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExportAccessError.js
index 6e66118f5b934..3e0e84dac0594 100644
--- a/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExportAccessError.js
+++ b/tests/baselines/reference/internalAliasInitializedModuleInsideLocalModuleWithoutExportAccessError.js
@@ -15,7 +15,7 @@ export var d = new c.b.c();
 
 //// [internalAliasInitializedModuleInsideLocalModuleWithoutExportAccessError.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     var b;
diff --git a/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithExport.js b/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithExport.js
index 86d9f88cee372..ec4e764c6020a 100644
--- a/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithExport.js
@@ -11,7 +11,7 @@ export var x: b.c = new b.c();
 
 //// [internalAliasInitializedModuleInsideTopLevelModuleWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     var b;
diff --git a/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithoutExport.js b/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithoutExport.js
index 79185fed2284a..9b044844c1253 100644
--- a/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasInitializedModuleInsideTopLevelModuleWithoutExport.js
@@ -12,7 +12,7 @@ export var x: b.c = new b.c();
 //// [internalAliasInitializedModuleInsideTopLevelModuleWithoutExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         var b;
diff --git a/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithExport.js b/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithExport.js
index bd50cd8bbc2ec..299d7104ab64a 100644
--- a/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithExport.js
@@ -13,7 +13,7 @@ export module c {
 //// [internalAliasInterfaceInsideLocalModuleWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c;
     (function (c) {
     })(c = exports.c || (exports.c = {}));
diff --git a/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExport.js b/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExport.js
index f7b08e6c170aa..9729867cfbe78 100644
--- a/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExport.js
@@ -13,7 +13,7 @@ export module c {
 //// [internalAliasInterfaceInsideLocalModuleWithoutExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c;
     (function (c) {
     })(c = exports.c || (exports.c = {}));
diff --git a/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExportAccessError.js b/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExportAccessError.js
index 19163ff1f66ab..67cef602ef96a 100644
--- a/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExportAccessError.js
+++ b/tests/baselines/reference/internalAliasInterfaceInsideLocalModuleWithoutExportAccessError.js
@@ -14,7 +14,7 @@ var x: c.b;
 //// [internalAliasInterfaceInsideLocalModuleWithoutExportAccessError.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c;
     (function (c) {
     })(c = exports.c || (exports.c = {}));
diff --git a/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithExport.js b/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithExport.js
index 4434670366c56..5adb22cac7424 100644
--- a/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithExport.js
@@ -10,7 +10,7 @@ export var x: b;
 
 //// [internalAliasInterfaceInsideTopLevelModuleWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 
 
 //// [internalAliasInterfaceInsideTopLevelModuleWithExport.d.ts]
diff --git a/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithoutExport.js b/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithoutExport.js
index 5645c76ed2ad5..cffa98b69f506 100644
--- a/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasInterfaceInsideTopLevelModuleWithoutExport.js
@@ -11,7 +11,7 @@ export var x: b;
 //// [internalAliasInterfaceInsideTopLevelModuleWithoutExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithExport.js b/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithExport.js
index 7ca966e90b206..c9f0eee107bdd 100644
--- a/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithExport.js
@@ -15,7 +15,7 @@ export module c {
 
 //// [internalAliasUninitializedModuleInsideLocalModuleWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var c;
 (function (c) {
     c.x.foo();
diff --git a/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExport.js b/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExport.js
index 22793f8aef5ae..d28711ac89968 100644
--- a/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExport.js
@@ -15,7 +15,7 @@ export module c {
 
 //// [internalAliasUninitializedModuleInsideLocalModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var c;
 (function (c) {
     c.x.foo();
diff --git a/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExportAccessError.js b/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExportAccessError.js
index a6b4f83de8e34..72ff6216004de 100644
--- a/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExportAccessError.js
+++ b/tests/baselines/reference/internalAliasUninitializedModuleInsideLocalModuleWithoutExportAccessError.js
@@ -19,7 +19,7 @@ export var z: c.b.I;
 //// [internalAliasUninitializedModuleInsideLocalModuleWithoutExportAccessError.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c;
     (function (c) {
         c.x.foo();
diff --git a/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithExport.js b/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithExport.js
index eccbd9a45bd58..229edcb30d518 100644
--- a/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithExport.js
@@ -15,7 +15,7 @@ x.foo();
 //// [internalAliasUninitializedModuleInsideTopLevelModuleWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x.foo();
 });
 
diff --git a/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithoutExport.js b/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithoutExport.js
index 27de6bbfd9837..560ac45207b69 100644
--- a/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasUninitializedModuleInsideTopLevelModuleWithoutExport.js
@@ -14,7 +14,7 @@ x.foo();
 
 //// [internalAliasUninitializedModuleInsideTopLevelModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x.foo();
 
 
diff --git a/tests/baselines/reference/internalAliasVarInsideLocalModuleWithExport.js b/tests/baselines/reference/internalAliasVarInsideLocalModuleWithExport.js
index 34f044721c49e..96cf6c0388561 100644
--- a/tests/baselines/reference/internalAliasVarInsideLocalModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasVarInsideLocalModuleWithExport.js
@@ -12,7 +12,7 @@ export module c {
 //// [internalAliasVarInsideLocalModuleWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         a.x = 10;
diff --git a/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExport.js b/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExport.js
index 161dc0bf97368..3a9613ffbcd2d 100644
--- a/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExport.js
@@ -12,7 +12,7 @@ export module c {
 //// [internalAliasVarInsideLocalModuleWithoutExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         a.x = 10;
diff --git a/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExportAccessError.js b/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExportAccessError.js
index a0192fc9daaf2..d0bd347fb3fd3 100644
--- a/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExportAccessError.js
+++ b/tests/baselines/reference/internalAliasVarInsideLocalModuleWithoutExportAccessError.js
@@ -12,7 +12,7 @@ export var z = c.b;
 
 //// [internalAliasVarInsideLocalModuleWithoutExportAccessError.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     a.x = 10;
diff --git a/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithExport.js b/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithExport.js
index d27b4e3188da2..673e6dad893e9 100644
--- a/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithExport.js
+++ b/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithExport.js
@@ -11,7 +11,7 @@ export var bVal = b;
 //// [internalAliasVarInsideTopLevelModuleWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     (function (a) {
         a.x = 10;
diff --git a/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithoutExport.js b/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithoutExport.js
index 65c9204ed3c1e..fb135f0668988 100644
--- a/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithoutExport.js
+++ b/tests/baselines/reference/internalAliasVarInsideTopLevelModuleWithoutExport.js
@@ -10,7 +10,7 @@ export var bVal = b;
 
 //// [internalAliasVarInsideTopLevelModuleWithoutExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a;
 (function (a) {
     a.x = 10;
diff --git a/tests/baselines/reference/intersectionTypeInference1.js b/tests/baselines/reference/intersectionTypeInference1.js
index e13f8edf0cffd..91a262d6c7c0e 100644
--- a/tests/baselines/reference/intersectionTypeInference1.js
+++ b/tests/baselines/reference/intersectionTypeInference1.js
@@ -11,7 +11,7 @@ export const Form3 = brokenFunction(parameterFn)({store: "hello"})
 //// [intersectionTypeInference1.js]
 "use strict";
 // Repro from #8801
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function alert(s) { }
 var parameterFn = function (props) { return alert(props.store); };
 var brokenFunction = function (f) { return function (o) { return o; }; };
diff --git a/tests/baselines/reference/invalidSyntaxNamespaceImportWithAMD.js b/tests/baselines/reference/invalidSyntaxNamespaceImportWithAMD.js
index b2adf37b5020f..b988ba51140fd 100644
--- a/tests/baselines/reference/invalidSyntaxNamespaceImportWithAMD.js
+++ b/tests/baselines/reference/invalidSyntaxNamespaceImportWithAMD.js
@@ -9,7 +9,7 @@ import * from Zero from "./0"
 //// [0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C = (function () {
         function C() {
         }
@@ -20,7 +20,7 @@ define(["require", "exports"], function (require, exports) {
 //// [1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     from;
     "./0";
 });
diff --git a/tests/baselines/reference/invalidSyntaxNamespaceImportWithCommonjs.js b/tests/baselines/reference/invalidSyntaxNamespaceImportWithCommonjs.js
index b1ab6fc6aa393..8f2071332dcc0 100644
--- a/tests/baselines/reference/invalidSyntaxNamespaceImportWithCommonjs.js
+++ b/tests/baselines/reference/invalidSyntaxNamespaceImportWithCommonjs.js
@@ -8,7 +8,7 @@ import * from Zero from "./0"
 
 //// [0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
@@ -17,7 +17,7 @@ var C = (function () {
 exports.C = C;
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var from = require();
 from;
 "./0";
diff --git a/tests/baselines/reference/isLiteral1.errors.txt b/tests/baselines/reference/isLiteral1.errors.txt
new file mode 100644
index 0000000000000..b967a4d0b4b27
--- /dev/null
+++ b/tests/baselines/reference/isLiteral1.errors.txt
@@ -0,0 +1,7 @@
+tests/cases/compiler/isLiteral1.ts(1,17): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2343'.
+
+
+==== tests/cases/compiler/isLiteral1.ts (1 errors) ====
+    var x: number = 02343;
+                    ~~~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2343'.
\ No newline at end of file
diff --git a/tests/baselines/reference/isLiteral2.errors.txt b/tests/baselines/reference/isLiteral2.errors.txt
new file mode 100644
index 0000000000000..dbf9a60bffdb9
--- /dev/null
+++ b/tests/baselines/reference/isLiteral2.errors.txt
@@ -0,0 +1,7 @@
+tests/cases/compiler/isLiteral2.ts(1,17): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2343'.
+
+
+==== tests/cases/compiler/isLiteral2.ts (1 errors) ====
+    var x: number = 02343
+                    ~~~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o2343'.
\ No newline at end of file
diff --git a/tests/baselines/reference/isolatedModulesSpecifiedModule.js b/tests/baselines/reference/isolatedModulesSpecifiedModule.js
index 895c47e250490..a06e826955f51 100644
--- a/tests/baselines/reference/isolatedModulesSpecifiedModule.js
+++ b/tests/baselines/reference/isolatedModulesSpecifiedModule.js
@@ -3,4 +3,4 @@ export var x;
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/isolatedModulesUnspecifiedModule.js b/tests/baselines/reference/isolatedModulesUnspecifiedModule.js
index 895c47e250490..a06e826955f51 100644
--- a/tests/baselines/reference/isolatedModulesUnspecifiedModule.js
+++ b/tests/baselines/reference/isolatedModulesUnspecifiedModule.js
@@ -3,4 +3,4 @@ export var x;
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.js b/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.js
index acc590418e980..d42a53bec83c2 100644
--- a/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.js
+++ b/tests/baselines/reference/jsFileCompilationRestParamJsDocFunction.js
@@ -25,7 +25,7 @@ export default apply;
 //// [apply.js]
 define("_apply", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     /**
      * A faster alternative to `Function#apply`, this function invokes `func`
      * with the `this` binding of `thisArg` and the arguments of `args`.
@@ -46,5 +46,5 @@ define("_apply", ["require", "exports"], function (require, exports) {
         }
         return func.apply(thisArg, args);
     }
-    exports["default"] = apply;
+    exports.default = apply;
 });
diff --git a/tests/baselines/reference/jsxImportInAttribute.js b/tests/baselines/reference/jsxImportInAttribute.js
index b249d88a6c2b4..f41787501976d 100644
--- a/tests/baselines/reference/jsxImportInAttribute.js
+++ b/tests/baselines/reference/jsxImportInAttribute.js
@@ -15,8 +15,8 @@ let x = Test; // emit test_1.default
 
 //// [consumer.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="component.d.ts" />
 var Test_1 = require("Test");
-var x = Test_1["default"]; // emit test_1.default
-<anything attr={Test_1["default"]}/>; // ?
+var x = Test_1.default; // emit test_1.default
+<anything attr={Test_1.default}/>; // ?
diff --git a/tests/baselines/reference/jsxViaImport.2.js b/tests/baselines/reference/jsxViaImport.2.js
index 813df2de93812..587851258c141 100644
--- a/tests/baselines/reference/jsxViaImport.2.js
+++ b/tests/baselines/reference/jsxViaImport.2.js
@@ -34,7 +34,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="component.d.ts" />
 var BaseComponent_1 = require("BaseComponent");
 var TestComponent = (function (_super) {
diff --git a/tests/baselines/reference/jsxViaImport.js b/tests/baselines/reference/jsxViaImport.js
index cfbbb9eb456ce..d3c8e4661417c 100644
--- a/tests/baselines/reference/jsxViaImport.js
+++ b/tests/baselines/reference/jsxViaImport.js
@@ -34,7 +34,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="component.d.ts" />
 var BaseComponent = require("BaseComponent");
 var TestComponent = (function (_super) {
diff --git a/tests/baselines/reference/keepImportsInDts1.js b/tests/baselines/reference/keepImportsInDts1.js
index e58702de2293a..a727eb8051a54 100644
--- a/tests/baselines/reference/keepImportsInDts1.js
+++ b/tests/baselines/reference/keepImportsInDts1.js
@@ -8,7 +8,7 @@ import "test"
 //// [main.js]
 define(["require", "exports", "test"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/keepImportsInDts2.js b/tests/baselines/reference/keepImportsInDts2.js
index 6e659f489dafb..89919c4fd6086 100644
--- a/tests/baselines/reference/keepImportsInDts2.js
+++ b/tests/baselines/reference/keepImportsInDts2.js
@@ -8,12 +8,12 @@ import "./folder/test"
 //// [test.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [main.js]
 define(["require", "exports", "./folder/test"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/keepImportsInDts3.js b/tests/baselines/reference/keepImportsInDts3.js
index 6589c675eaa40..5306b31735818 100644
--- a/tests/baselines/reference/keepImportsInDts3.js
+++ b/tests/baselines/reference/keepImportsInDts3.js
@@ -8,11 +8,11 @@ import "test"
 //// [outputfile.js]
 define("test", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 define("app/main", ["require", "exports", "test"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/keepImportsInDts4.js b/tests/baselines/reference/keepImportsInDts4.js
index 41c07e836684e..72ea29ac684df 100644
--- a/tests/baselines/reference/keepImportsInDts4.js
+++ b/tests/baselines/reference/keepImportsInDts4.js
@@ -8,11 +8,11 @@ import "./folder/test"
 //// [outputfile.js]
 define("folder/test", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 define("main", ["require", "exports", "folder/test"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/keywordField.js b/tests/baselines/reference/keywordField.js
index a146cffade84f..581d5afa14a38 100644
--- a/tests/baselines/reference/keywordField.js
+++ b/tests/baselines/reference/keywordField.js
@@ -12,7 +12,7 @@ var q = a["if"];
 
 //// [keywordField.js]
 var obj = {};
-obj["if"] = 1;
-var a = { "if": "test" };
-var n = a["if"];
+obj.if = 1;
+var a = { if: "test" };
+var n = a.if;
 var q = a["if"];
diff --git a/tests/baselines/reference/keywordInJsxIdentifier.js b/tests/baselines/reference/keywordInJsxIdentifier.js
index f88fe4dff877b..969bf49e8491f 100644
--- a/tests/baselines/reference/keywordInJsxIdentifier.js
+++ b/tests/baselines/reference/keywordInJsxIdentifier.js
@@ -8,6 +8,6 @@ declare var React: any;
 
 //// [keywordInJsxIdentifier.js]
 React.createElement("foo", { "class-id": true });
-React.createElement("foo", { "class": true });
+React.createElement("foo", { class: true });
 React.createElement("foo", { "class-id": "1" });
-React.createElement("foo", { "class": "1" });
+React.createElement("foo", { class: "1" });
diff --git a/tests/baselines/reference/localAliasExportAssignment.js b/tests/baselines/reference/localAliasExportAssignment.js
index f198c0f9ea777..d17e2ddd8437a 100644
--- a/tests/baselines/reference/localAliasExportAssignment.js
+++ b/tests/baselines/reference/localAliasExportAssignment.js
@@ -22,7 +22,7 @@ var server;
 module.exports = server;
 //// [localAliasExportAssignment_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='localAliasExportAssignment_0.ts'/>
 var connect = require("./localAliasExportAssignment_0");
 connect();
diff --git a/tests/baselines/reference/mapOnTupleTypes01.js b/tests/baselines/reference/mapOnTupleTypes01.js
index 565988bfd73f6..6df6ad3098d80 100644
--- a/tests/baselines/reference/mapOnTupleTypes01.js
+++ b/tests/baselines/reference/mapOnTupleTypes01.js
@@ -43,7 +43,7 @@ export let h = numNumNumNumNum.map(n => n * n);
 
 //// [mapOnTupleTypes01.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.mapOnLooseArrayLiteral = [1, 2, 3, 4].map(function (n) { return n * n; });
 // Length 1
 var numTuple = [1];
diff --git a/tests/baselines/reference/mapOnTupleTypes02.js b/tests/baselines/reference/mapOnTupleTypes02.js
index 2fd4daab16bf5..2520f6e01f3fb 100644
--- a/tests/baselines/reference/mapOnTupleTypes02.js
+++ b/tests/baselines/reference/mapOnTupleTypes02.js
@@ -7,7 +7,7 @@ export function increment(point: Point) {
 
 //// [mapOnTupleTypes02.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function increment(point) {
     return point.map(function (d) { return d + 1; });
 }
diff --git a/tests/baselines/reference/memberAccessMustUseModuleInstances.js b/tests/baselines/reference/memberAccessMustUseModuleInstances.js
index 2ba05b016bee2..29e0bfc4fff42 100644
--- a/tests/baselines/reference/memberAccessMustUseModuleInstances.js
+++ b/tests/baselines/reference/memberAccessMustUseModuleInstances.js
@@ -17,7 +17,7 @@ WinJS.Promise.timeout(10);
 //// [memberAccessMustUseModuleInstances_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Promise = (function () {
         function Promise() {
         }
@@ -31,6 +31,6 @@ define(["require", "exports"], function (require, exports) {
 //// [memberAccessMustUseModuleInstances_1.js]
 define(["require", "exports", "memberAccessMustUseModuleInstances_0"], function (require, exports, WinJS) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     WinJS.Promise.timeout(10);
 });
diff --git a/tests/baselines/reference/mergeWithImportedNamespace.js b/tests/baselines/reference/mergeWithImportedNamespace.js
index ec2eb4a1087cb..9d9e11dabc316 100644
--- a/tests/baselines/reference/mergeWithImportedNamespace.js
+++ b/tests/baselines/reference/mergeWithImportedNamespace.js
@@ -12,11 +12,11 @@ export namespace N {
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var N;
 (function (N) {
     N.x = 1;
 })(N = exports.N || (exports.N = {}));
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/mergeWithImportedType.js b/tests/baselines/reference/mergeWithImportedType.js
index efa95d7763064..1360ee0c5ea84 100644
--- a/tests/baselines/reference/mergeWithImportedType.js
+++ b/tests/baselines/reference/mergeWithImportedType.js
@@ -10,11 +10,11 @@ export type E = E;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var E;
 (function (E) {
     E[E["X"] = 0] = "X";
 })(E = exports.E || (exports.E = {}));
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/mergedDeclarations6.js b/tests/baselines/reference/mergedDeclarations6.js
index 2b492b569c250..f8be1486ef2cf 100644
--- a/tests/baselines/reference/mergedDeclarations6.js
+++ b/tests/baselines/reference/mergedDeclarations6.js
@@ -25,7 +25,7 @@ export class B extends A {
 //// [a.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -49,7 +49,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 define(["require", "exports", "./a"], function (require, exports, a_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function (_super) {
         __extends(B, _super);
         function B() {
diff --git a/tests/baselines/reference/mergedDeclarations7.js b/tests/baselines/reference/mergedDeclarations7.js
index 8fa3f2d0731f5..340f03189bbaa 100644
--- a/tests/baselines/reference/mergedDeclarations7.js
+++ b/tests/baselines/reference/mergedDeclarations7.js
@@ -24,6 +24,6 @@ let p: Passport = passport.use();
 
 //// [test.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var passport = require("passport");
 var p = passport.use();
diff --git a/tests/baselines/reference/mergedModuleDeclarationCodeGen.js b/tests/baselines/reference/mergedModuleDeclarationCodeGen.js
index 8d5f55b68017f..aea117787b2aa 100644
--- a/tests/baselines/reference/mergedModuleDeclarationCodeGen.js
+++ b/tests/baselines/reference/mergedModuleDeclarationCodeGen.js
@@ -17,7 +17,7 @@ export module X {
 
 //// [mergedModuleDeclarationCodeGen.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var X;
 (function (X) {
     var Y;
diff --git a/tests/baselines/reference/metadataOfStringLiteral.js b/tests/baselines/reference/metadataOfStringLiteral.js
index 676914681cb91..c45071114e09d 100644
--- a/tests/baselines/reference/metadataOfStringLiteral.js
+++ b/tests/baselines/reference/metadataOfStringLiteral.js
@@ -25,4 +25,4 @@ var Foo = (function () {
 __decorate([
     PropDeco,
     __metadata("design:type", String)
-], Foo.prototype, "foo");
+], Foo.prototype, "foo", void 0);
diff --git a/tests/baselines/reference/metadataOfUnion.js b/tests/baselines/reference/metadataOfUnion.js
index 9a88481c80a9e..d450855b38ec2 100644
--- a/tests/baselines/reference/metadataOfUnion.js
+++ b/tests/baselines/reference/metadataOfUnion.js
@@ -60,15 +60,15 @@ var B = (function () {
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "x");
+], B.prototype, "x", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Boolean)
-], B.prototype, "y");
+], B.prototype, "y", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "z");
+], B.prototype, "z", void 0);
 var E;
 (function (E) {
     E[E["A"] = 0] = "A";
@@ -84,16 +84,16 @@ var D = (function () {
 __decorate([
     PropDeco,
     __metadata("design:type", Number)
-], D.prototype, "a");
+], D.prototype, "a", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Number)
-], D.prototype, "b");
+], D.prototype, "b", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Number)
-], D.prototype, "c");
+], D.prototype, "c", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Number)
-], D.prototype, "d");
+], D.prototype, "d", void 0);
diff --git a/tests/baselines/reference/metadataOfUnionWithNull.js b/tests/baselines/reference/metadataOfUnionWithNull.js
index 0c834be96876f..0fe2849efcbc7 100644
--- a/tests/baselines/reference/metadataOfUnionWithNull.js
+++ b/tests/baselines/reference/metadataOfUnionWithNull.js
@@ -66,48 +66,48 @@ var B = (function () {
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "x");
+], B.prototype, "x", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "y");
+], B.prototype, "y", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "z");
+], B.prototype, "z", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", void 0)
-], B.prototype, "a");
+], B.prototype, "a", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", void 0)
-], B.prototype, "b");
+], B.prototype, "b", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", void 0)
-], B.prototype, "c");
+], B.prototype, "c", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "d");
+], B.prototype, "d", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "e");
+], B.prototype, "e", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "f");
+], B.prototype, "f", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "g");
+], B.prototype, "g", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "h");
+], B.prototype, "h", void 0);
 __decorate([
     PropDeco,
     __metadata("design:type", Object)
-], B.prototype, "j");
+], B.prototype, "j", void 0);
diff --git a/tests/baselines/reference/missingFunctionImplementation.js b/tests/baselines/reference/missingFunctionImplementation.js
index 5ca505dff85ba..aead5c832dd26 100644
--- a/tests/baselines/reference/missingFunctionImplementation.js
+++ b/tests/baselines/reference/missingFunctionImplementation.js
@@ -81,7 +81,7 @@ namespace N12 {
 
 //// [missingFunctionImplementation.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C1 = (function () {
     function C1() {
     }
diff --git a/tests/baselines/reference/missingFunctionImplementation2.js b/tests/baselines/reference/missingFunctionImplementation2.js
index dde60611657c0..4c554e23c8549 100644
--- a/tests/baselines/reference/missingFunctionImplementation2.js
+++ b/tests/baselines/reference/missingFunctionImplementation2.js
@@ -11,7 +11,7 @@ export function f(a?, b?);
 
 //// [missingFunctionImplementation2_a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [missingFunctionImplementation2_b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/missingSemicolonInModuleSpecifier.js b/tests/baselines/reference/missingSemicolonInModuleSpecifier.js
index 889f2b800be14..0c7eb385d6855 100644
--- a/tests/baselines/reference/missingSemicolonInModuleSpecifier.js
+++ b/tests/baselines/reference/missingSemicolonInModuleSpecifier.js
@@ -9,9 +9,9 @@ import {x} from "./a"
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 (function () { return 1; }());
diff --git a/tests/baselines/reference/moduleAliasAsFunctionArgument.js b/tests/baselines/reference/moduleAliasAsFunctionArgument.js
index 16eb962a863ce..a5298113be7d1 100644
--- a/tests/baselines/reference/moduleAliasAsFunctionArgument.js
+++ b/tests/baselines/reference/moduleAliasAsFunctionArgument.js
@@ -17,12 +17,12 @@ fn(a); // Error: property 'x' is missing from 'a'
 //// [moduleAliasAsFunctionArgument_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [moduleAliasAsFunctionArgument_1.js]
 define(["require", "exports", "moduleAliasAsFunctionArgument_0"], function (require, exports, a) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function fn(arg) {
     }
     a.x; // OK
diff --git a/tests/baselines/reference/moduleAugmentationCollidingNamesInAugmentation1.js b/tests/baselines/reference/moduleAugmentationCollidingNamesInAugmentation1.js
index 949a30efc8fca..7e3f296b3d330 100644
--- a/tests/baselines/reference/moduleAugmentationCollidingNamesInAugmentation1.js
+++ b/tests/baselines/reference/moduleAugmentationCollidingNamesInAugmentation1.js
@@ -35,24 +35,24 @@ let x: Observable<number>;
 //// [observable.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [map1.js]
 define(["require", "exports", "./observable"], function (require, exports, observable_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     observable_1.Observable.prototype.map = function () { };
 });
 //// [map2.js]
 define(["require", "exports", "./observable"], function (require, exports, observable_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     observable_1.Observable.prototype.map = function () { };
 });
 //// [main.js]
 define(["require", "exports", "./map1", "./map2"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x;
 });
 
diff --git a/tests/baselines/reference/moduleAugmentationDeclarationEmit1.js b/tests/baselines/reference/moduleAugmentationDeclarationEmit1.js
index 818c49c9edf8f..e51246dc2f482 100644
--- a/tests/baselines/reference/moduleAugmentationDeclarationEmit1.js
+++ b/tests/baselines/reference/moduleAugmentationDeclarationEmit1.js
@@ -33,19 +33,19 @@ let y = x.map(x => x + 1);
 
 //// [observable.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Observable;
 (function (Observable) {
     var someValue;
 })(Observable = exports.Observable || (exports.Observable = {}));
 //// [map.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("./observable");
 observable_1.Observable.prototype.map = function () { };
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./map");
 var x;
 var y = x.map(function (x) { return x + 1; });
diff --git a/tests/baselines/reference/moduleAugmentationDeclarationEmit2.js b/tests/baselines/reference/moduleAugmentationDeclarationEmit2.js
index 1dca750a6148f..299af98a14c74 100644
--- a/tests/baselines/reference/moduleAugmentationDeclarationEmit2.js
+++ b/tests/baselines/reference/moduleAugmentationDeclarationEmit2.js
@@ -35,18 +35,18 @@ let z2 = Observable.someAnotherValue.toLowerCase();
 
 //// [observable.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Observable;
 (function (Observable) {
 })(Observable = exports.Observable || (exports.Observable = {}));
 //// [map.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("./observable");
 observable_1.Observable.prototype.map = function () { };
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("./observable");
 require("./map");
 var x;
diff --git a/tests/baselines/reference/moduleAugmentationDisallowedExtensions.js b/tests/baselines/reference/moduleAugmentationDisallowedExtensions.js
index 02e2fb313c470..0cde0df355ef8 100644
--- a/tests/baselines/reference/moduleAugmentationDisallowedExtensions.js
+++ b/tests/baselines/reference/moduleAugmentationDisallowedExtensions.js
@@ -47,24 +47,24 @@ import "./x";
 
 //// [x0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.a = 1;
 //// [x.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var N1;
 (function (N1) {
     N1.x = 1;
 })(N1 || (N1 = {}));
 //// [observable.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 //// [test.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.b = 1;
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./x");
diff --git a/tests/baselines/reference/moduleAugmentationExtendAmbientModule1.js b/tests/baselines/reference/moduleAugmentationExtendAmbientModule1.js
index 1ef8a7cd15414..8876ef2ae6d8e 100644
--- a/tests/baselines/reference/moduleAugmentationExtendAmbientModule1.js
+++ b/tests/baselines/reference/moduleAugmentationExtendAmbientModule1.js
@@ -34,12 +34,12 @@ let y = x.map(x => x + 1);
 
 //// [map.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("observable");
 observable_1.Observable.prototype.map = function () { };
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./map");
 var x;
 var y = x.map(function (x) { return x + 1; });
diff --git a/tests/baselines/reference/moduleAugmentationExtendAmbientModule2.js b/tests/baselines/reference/moduleAugmentationExtendAmbientModule2.js
index 23e61952e30be..5ba3986c1fe09 100644
--- a/tests/baselines/reference/moduleAugmentationExtendAmbientModule2.js
+++ b/tests/baselines/reference/moduleAugmentationExtendAmbientModule2.js
@@ -36,12 +36,12 @@ let z2 = Observable.someAnotherValue.toLowerCase();
 
 //// [map.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("observable");
 observable_1.Observable.prototype.map = function () { };
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="observable.d.ts"/>
 var observable_1 = require("observable");
 require("./map");
diff --git a/tests/baselines/reference/moduleAugmentationExtendFileModule1.js b/tests/baselines/reference/moduleAugmentationExtendFileModule1.js
index 85b30f4d0027f..a71bbb969e9ed 100644
--- a/tests/baselines/reference/moduleAugmentationExtendFileModule1.js
+++ b/tests/baselines/reference/moduleAugmentationExtendFileModule1.js
@@ -33,19 +33,19 @@ let y = x.map(x => x + 1);
 
 //// [observable.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Observable;
 (function (Observable) {
     var someValue;
 })(Observable = exports.Observable || (exports.Observable = {}));
 //// [map.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("./observable");
 observable_1.Observable.prototype.map = function () { };
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./map");
 var x;
 var y = x.map(function (x) { return x + 1; });
diff --git a/tests/baselines/reference/moduleAugmentationExtendFileModule2.js b/tests/baselines/reference/moduleAugmentationExtendFileModule2.js
index 4c67c63d1bb78..fdc35d98d5328 100644
--- a/tests/baselines/reference/moduleAugmentationExtendFileModule2.js
+++ b/tests/baselines/reference/moduleAugmentationExtendFileModule2.js
@@ -35,18 +35,18 @@ let z2 = Observable.someAnotherValue.toLowerCase();
 
 //// [observable.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Observable;
 (function (Observable) {
 })(Observable = exports.Observable || (exports.Observable = {}));
 //// [map.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("./observable");
 observable_1.Observable.prototype.map = function () { };
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("./observable");
 require("./map");
 var x;
diff --git a/tests/baselines/reference/moduleAugmentationGlobal1.js b/tests/baselines/reference/moduleAugmentationGlobal1.js
index ae4042768e800..39e381bbb125b 100644
--- a/tests/baselines/reference/moduleAugmentationGlobal1.js
+++ b/tests/baselines/reference/moduleAugmentationGlobal1.js
@@ -19,7 +19,7 @@ let y = x.getA().x;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -28,7 +28,7 @@ var A = (function () {
 exports.A = A;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = [1];
 var y = x.getA().x;
 
diff --git a/tests/baselines/reference/moduleAugmentationGlobal2.js b/tests/baselines/reference/moduleAugmentationGlobal2.js
index 28f6d3babf048..0959a595ee321 100644
--- a/tests/baselines/reference/moduleAugmentationGlobal2.js
+++ b/tests/baselines/reference/moduleAugmentationGlobal2.js
@@ -18,7 +18,7 @@ let y = x.getCountAsString().toLowerCase();
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -28,7 +28,7 @@ exports.A = A;
 ;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = [1];
 var y = x.getCountAsString().toLowerCase();
 
diff --git a/tests/baselines/reference/moduleAugmentationGlobal3.js b/tests/baselines/reference/moduleAugmentationGlobal3.js
index d744d3017b905..a35fc5c74300a 100644
--- a/tests/baselines/reference/moduleAugmentationGlobal3.js
+++ b/tests/baselines/reference/moduleAugmentationGlobal3.js
@@ -21,7 +21,7 @@ let y = x.getCountAsString().toLowerCase();
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -31,10 +31,10 @@ exports.A = A;
 ;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f2");
 var x = [1];
 var y = x.getCountAsString().toLowerCase();
diff --git a/tests/baselines/reference/moduleAugmentationGlobal4.js b/tests/baselines/reference/moduleAugmentationGlobal4.js
index a47e4c6673a2e..927516da9622a 100644
--- a/tests/baselines/reference/moduleAugmentationGlobal4.js
+++ b/tests/baselines/reference/moduleAugmentationGlobal4.js
@@ -18,13 +18,13 @@ import "./f2";
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f1");
 require("./f2");
 
diff --git a/tests/baselines/reference/moduleAugmentationGlobal5.js b/tests/baselines/reference/moduleAugmentationGlobal5.js
index 55433fcf6d6b9..f865fba81fe07 100644
--- a/tests/baselines/reference/moduleAugmentationGlobal5.js
+++ b/tests/baselines/reference/moduleAugmentationGlobal5.js
@@ -22,7 +22,7 @@ import "B";
 
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="f1.d.ts"/>
 /// <reference path="f2.d.ts"/>
 require("A");
diff --git a/tests/baselines/reference/moduleAugmentationImportsAndExports1.js b/tests/baselines/reference/moduleAugmentationImportsAndExports1.js
index 27d69dd181c7d..abb6eb59c36f1 100644
--- a/tests/baselines/reference/moduleAugmentationImportsAndExports1.js
+++ b/tests/baselines/reference/moduleAugmentationImportsAndExports1.js
@@ -28,7 +28,7 @@ let b = a.foo().n;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -37,7 +37,7 @@ var A = (function () {
 exports.A = A;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
@@ -46,12 +46,12 @@ var B = (function () {
 exports.B = B;
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f1_1 = require("./f1");
 f1_1.A.prototype.foo = function () { return undefined; };
 //// [f4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f3");
 var a;
 var b = a.foo().n;
diff --git a/tests/baselines/reference/moduleAugmentationImportsAndExports2.js b/tests/baselines/reference/moduleAugmentationImportsAndExports2.js
index 32d7950574df1..6563fc0d8b363 100644
--- a/tests/baselines/reference/moduleAugmentationImportsAndExports2.js
+++ b/tests/baselines/reference/moduleAugmentationImportsAndExports2.js
@@ -40,7 +40,7 @@ let b = a.foo().n;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -49,7 +49,7 @@ var A = (function () {
 exports.A = A;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
@@ -58,12 +58,12 @@ var B = (function () {
 exports.B = B;
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f1_1 = require("./f1");
 f1_1.A.prototype.foo = function () { return undefined; };
 //// [f4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f3");
 var a;
 var b = a.foo().n;
diff --git a/tests/baselines/reference/moduleAugmentationImportsAndExports3.js b/tests/baselines/reference/moduleAugmentationImportsAndExports3.js
index 12bcffd00f698..8f8f4aa579fdc 100644
--- a/tests/baselines/reference/moduleAugmentationImportsAndExports3.js
+++ b/tests/baselines/reference/moduleAugmentationImportsAndExports3.js
@@ -38,7 +38,7 @@ let b = a.foo().n;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -47,7 +47,7 @@ var A = (function () {
 exports.A = A;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
@@ -56,12 +56,12 @@ var B = (function () {
 exports.B = B;
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f1_1 = require("./f1");
 f1_1.A.prototype.foo = function () { return undefined; };
 //// [f4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f3");
 var a;
 var b = a.foo().n;
diff --git a/tests/baselines/reference/moduleAugmentationImportsAndExports4.js b/tests/baselines/reference/moduleAugmentationImportsAndExports4.js
index 041c2c71d093a..a92ac21e9bd83 100644
--- a/tests/baselines/reference/moduleAugmentationImportsAndExports4.js
+++ b/tests/baselines/reference/moduleAugmentationImportsAndExports4.js
@@ -40,7 +40,7 @@ let d = a.baz().b;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -49,7 +49,7 @@ var A = (function () {
 exports.A = A;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
@@ -58,12 +58,12 @@ var B = (function () {
 exports.B = B;
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f1_1 = require("./f1");
 f1_1.A.prototype.foo = function () { return undefined; };
 //// [f4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f3");
 var a;
 var b = a.foo().n;
diff --git a/tests/baselines/reference/moduleAugmentationImportsAndExports5.js b/tests/baselines/reference/moduleAugmentationImportsAndExports5.js
index 25a3702db6414..1dbe4ea7359b7 100644
--- a/tests/baselines/reference/moduleAugmentationImportsAndExports5.js
+++ b/tests/baselines/reference/moduleAugmentationImportsAndExports5.js
@@ -40,7 +40,7 @@ let d = a.baz().b;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -49,7 +49,7 @@ var A = (function () {
 exports.A = A;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
@@ -58,12 +58,12 @@ var B = (function () {
 exports.B = B;
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f1_1 = require("./f1");
 f1_1.A.prototype.foo = function () { return undefined; };
 //// [f4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f3");
 var a;
 var b = a.foo().n;
diff --git a/tests/baselines/reference/moduleAugmentationImportsAndExports6.js b/tests/baselines/reference/moduleAugmentationImportsAndExports6.js
index 3796d70f2d325..37de04062a053 100644
--- a/tests/baselines/reference/moduleAugmentationImportsAndExports6.js
+++ b/tests/baselines/reference/moduleAugmentationImportsAndExports6.js
@@ -40,7 +40,7 @@ let d = a.baz().b;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
@@ -49,7 +49,7 @@ var A = (function () {
 exports.A = A;
 //// [f2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
@@ -58,12 +58,12 @@ var B = (function () {
 exports.B = B;
 //// [f3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f1_1 = require("./f1");
 f1_1.A.prototype.foo = function () { return undefined; };
 //// [f4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./f3");
 var a;
 var b = a.foo().n;
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule1.js b/tests/baselines/reference/moduleAugmentationInAmbientModule1.js
index 7bd3c93496c3a..b58843ef00356 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule1.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule1.js
@@ -29,7 +29,7 @@ x.foo().x;
 //// [main.js]
 "use strict";
 /// <reference path="O.d.ts" />
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 x.foo().x;
 
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule2.js b/tests/baselines/reference/moduleAugmentationInAmbientModule2.js
index f3d276309ef27..681bc959e511f 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule2.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule2.js
@@ -30,7 +30,7 @@ x.foo().x;
 //// [main.js]
 "use strict";
 /// <reference path="O.d.ts" />
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("Map");
 var x;
 x.foo().x;
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule3.js b/tests/baselines/reference/moduleAugmentationInAmbientModule3.js
index 3cedfd66d5deb..fe0e99f1d74cf 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule3.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule3.js
@@ -40,7 +40,7 @@ x.foo2().x2;
 //// [main.js]
 "use strict";
 /// <reference path="O.d.ts" />
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("Map");
 var x;
 x.foo().x;
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule4.js b/tests/baselines/reference/moduleAugmentationInAmbientModule4.js
index ab4ff1bc79f11..5abd8b988fa94 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule4.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule4.js
@@ -43,7 +43,7 @@ x.foo2().x2;
 "use strict";
 /// <reference path="O.d.ts" />
 /// <reference path="O2.d.ts" />
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("Map");
 var x;
 x.foo().x;
diff --git a/tests/baselines/reference/moduleAugmentationInAmbientModule5.js b/tests/baselines/reference/moduleAugmentationInAmbientModule5.js
index 4f99c79fa18e8..0c47c33bcfb36 100644
--- a/tests/baselines/reference/moduleAugmentationInAmbientModule5.js
+++ b/tests/baselines/reference/moduleAugmentationInAmbientModule5.js
@@ -24,7 +24,7 @@ let y = x.getA().x;
 
 //// [f.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="array.d.ts"/>
 require("array");
 var x = [1];
diff --git a/tests/baselines/reference/moduleAugmentationInDependency.js b/tests/baselines/reference/moduleAugmentationInDependency.js
index 31c82ad18e881..1b4243beca70f 100644
--- a/tests/baselines/reference/moduleAugmentationInDependency.js
+++ b/tests/baselines/reference/moduleAugmentationInDependency.js
@@ -10,5 +10,5 @@ import "A"
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("A");
diff --git a/tests/baselines/reference/moduleAugmentationInDependency2.js b/tests/baselines/reference/moduleAugmentationInDependency2.js
index e7a964650bd8e..f1d72fd5f133b 100644
--- a/tests/baselines/reference/moduleAugmentationInDependency2.js
+++ b/tests/baselines/reference/moduleAugmentationInDependency2.js
@@ -10,8 +10,8 @@ import "A"
 
 //// [index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("A");
diff --git a/tests/baselines/reference/moduleAugmentationNoNewNames.js b/tests/baselines/reference/moduleAugmentationNoNewNames.js
index 0887377bc5895..939fa2ca85d3a 100644
--- a/tests/baselines/reference/moduleAugmentationNoNewNames.js
+++ b/tests/baselines/reference/moduleAugmentationNoNewNames.js
@@ -29,15 +29,15 @@ let y = x.map(x => x + 1);
 
 //// [observable.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [map.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var observable_1 = require("./observable");
 observable_1.Observable.prototype.map = function () { };
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("./map");
 var x;
 var y = x.map(function (x) { return x + 1; });
diff --git a/tests/baselines/reference/moduleAugmentationsImports1.js b/tests/baselines/reference/moduleAugmentationsImports1.js
index 9e40067c2fe36..8ddba3fa544cf 100644
--- a/tests/baselines/reference/moduleAugmentationsImports1.js
+++ b/tests/baselines/reference/moduleAugmentationsImports1.js
@@ -44,7 +44,7 @@ let c = a.getCls().y.toLowerCase();
 //// [f.js]
 define("a", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -54,7 +54,7 @@ define("a", ["require", "exports"], function (require, exports) {
 });
 define("b", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function () {
         function B() {
         }
@@ -65,13 +65,13 @@ define("b", ["require", "exports"], function (require, exports) {
 /// <reference path="c.d.ts"/>
 define("d", ["require", "exports", "a"], function (require, exports, a_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     a_1.A.prototype.getB = function () { return undefined; };
     a_1.A.prototype.getCls = function () { return undefined; };
 });
 define("main", ["require", "exports", "d"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = a.getB().x.toFixed();
     var c = a.getCls().y.toLowerCase();
diff --git a/tests/baselines/reference/moduleAugmentationsImports2.js b/tests/baselines/reference/moduleAugmentationsImports2.js
index 5955cd10e59ed..ea09de6312fa1 100644
--- a/tests/baselines/reference/moduleAugmentationsImports2.js
+++ b/tests/baselines/reference/moduleAugmentationsImports2.js
@@ -49,7 +49,7 @@ let c = a.getCls().y.toLowerCase();
 //// [f.js]
 define("a", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -59,7 +59,7 @@ define("a", ["require", "exports"], function (require, exports) {
 });
 define("b", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function () {
         function B() {
         }
@@ -70,17 +70,17 @@ define("b", ["require", "exports"], function (require, exports) {
 /// <reference path="c.d.ts"/>
 define("d", ["require", "exports", "a"], function (require, exports, a_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     a_1.A.prototype.getB = function () { return undefined; };
 });
 define("e", ["require", "exports", "a"], function (require, exports, a_2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     a_2.A.prototype.getCls = function () { return undefined; };
 });
 define("main", ["require", "exports", "d", "e"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = a.getB().x.toFixed();
     var c = a.getCls().y.toLowerCase();
diff --git a/tests/baselines/reference/moduleAugmentationsImports3.js b/tests/baselines/reference/moduleAugmentationsImports3.js
index 20ff1b25271aa..4bb17dfdcbab9 100644
--- a/tests/baselines/reference/moduleAugmentationsImports3.js
+++ b/tests/baselines/reference/moduleAugmentationsImports3.js
@@ -48,7 +48,7 @@ let c = a.getCls().y.toLowerCase();
 //// [f.js]
 define("a", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -58,7 +58,7 @@ define("a", ["require", "exports"], function (require, exports) {
 });
 define("b", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function () {
         function B() {
         }
@@ -68,12 +68,12 @@ define("b", ["require", "exports"], function (require, exports) {
 });
 define("e", ["require", "exports", "a"], function (require, exports, a_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     a_1.A.prototype.getCls = function () { return undefined; };
 });
 define("main", ["require", "exports", "D", "e"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = a.getB().x.toFixed();
     var c = a.getCls().y.toLowerCase();
diff --git a/tests/baselines/reference/moduleAugmentationsImports4.js b/tests/baselines/reference/moduleAugmentationsImports4.js
index ee66546983d9b..b0de18a4675d1 100644
--- a/tests/baselines/reference/moduleAugmentationsImports4.js
+++ b/tests/baselines/reference/moduleAugmentationsImports4.js
@@ -49,7 +49,7 @@ let c = a.getCls().y.toLowerCase();
 //// [f.js]
 define("a", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -59,7 +59,7 @@ define("a", ["require", "exports"], function (require, exports) {
 });
 define("b", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function () {
         function B() {
         }
@@ -69,7 +69,7 @@ define("b", ["require", "exports"], function (require, exports) {
 });
 define("main", ["require", "exports", "D", "E"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a;
     var b = a.getB().x.toFixed();
     var c = a.getCls().y.toLowerCase();
diff --git a/tests/baselines/reference/moduleCodeGenTest5.js b/tests/baselines/reference/moduleCodeGenTest5.js
index ee6fd2ab3176b..cc8fbefcb5a27 100644
--- a/tests/baselines/reference/moduleCodeGenTest5.js
+++ b/tests/baselines/reference/moduleCodeGenTest5.js
@@ -23,7 +23,7 @@ var v = E2.B;
 
 //// [moduleCodeGenTest5.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 0;
 var y = 0;
 function f1() { }
diff --git a/tests/baselines/reference/moduleCodegenTest4.js b/tests/baselines/reference/moduleCodegenTest4.js
index f877ad74bc36a..f2f26d24568be 100644
--- a/tests/baselines/reference/moduleCodegenTest4.js
+++ b/tests/baselines/reference/moduleCodegenTest4.js
@@ -6,7 +6,7 @@ void 0;
 
 //// [moduleCodegenTest4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Baz;
 (function (Baz) {
     Baz.x = "hello";
diff --git a/tests/baselines/reference/moduleDuplicateIdentifiers.js b/tests/baselines/reference/moduleDuplicateIdentifiers.js
index a2a099fca1d56..6ba3c44e87679 100644
--- a/tests/baselines/reference/moduleDuplicateIdentifiers.js
+++ b/tests/baselines/reference/moduleDuplicateIdentifiers.js
@@ -42,7 +42,7 @@ export enum Utensils { // Shouldn't error
 
 //// [moduleDuplicateIdentifiers.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.Foo = 2;
 exports.Foo = 42; // Should error
 var FooBar;
diff --git a/tests/baselines/reference/moduleExports1.js b/tests/baselines/reference/moduleExports1.js
index 66c746c5f5189..cdce97f43c962 100644
--- a/tests/baselines/reference/moduleExports1.js
+++ b/tests/baselines/reference/moduleExports1.js
@@ -16,7 +16,7 @@ if (!module.exports) module.exports = "";
 //// [moduleExports1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var TypeScript;
     (function (TypeScript) {
         var Strasse;
diff --git a/tests/baselines/reference/moduleImportedForTypeArgumentPosition.js b/tests/baselines/reference/moduleImportedForTypeArgumentPosition.js
index 2ed22cfa4f0e3..3f881edfefa87 100644
--- a/tests/baselines/reference/moduleImportedForTypeArgumentPosition.js
+++ b/tests/baselines/reference/moduleImportedForTypeArgumentPosition.js
@@ -14,7 +14,7 @@ class Test1 extends C1<M2.M2C> {
 //// [moduleImportedForTypeArgumentPosition_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [moduleImportedForTypeArgumentPosition_1.js]
 var __extends = (this && this.__extends) || (function () {
@@ -29,7 +29,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C1 = (function () {
         function C1() {
         }
diff --git a/tests/baselines/reference/moduleInTypePosition1.js b/tests/baselines/reference/moduleInTypePosition1.js
index 7408db5c29111..66759cee50777 100644
--- a/tests/baselines/reference/moduleInTypePosition1.js
+++ b/tests/baselines/reference/moduleInTypePosition1.js
@@ -13,7 +13,7 @@ var x = (w1: WinJS) => { };
 
 //// [moduleInTypePosition1_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Promise = (function () {
     function Promise() {
     }
@@ -22,5 +22,5 @@ var Promise = (function () {
 exports.Promise = Promise;
 //// [moduleInTypePosition1_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = function (w1) { };
diff --git a/tests/baselines/reference/moduleMergeConstructor.js b/tests/baselines/reference/moduleMergeConstructor.js
index 5ecaf8365d880..9ae429ec40dab 100644
--- a/tests/baselines/reference/moduleMergeConstructor.js
+++ b/tests/baselines/reference/moduleMergeConstructor.js
@@ -29,7 +29,7 @@ class Test {
 //// [index.js]
 define(["require", "exports", "foo"], function (require, exports, foo) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Test = (function () {
         function Test() {
             this.bar = new foo.Foo();
diff --git a/tests/baselines/reference/moduleNoneErrors.js b/tests/baselines/reference/moduleNoneErrors.js
index 7be89f236be00..93a2521a2878f 100644
--- a/tests/baselines/reference/moduleNoneErrors.js
+++ b/tests/baselines/reference/moduleNoneErrors.js
@@ -6,7 +6,7 @@ export class Foo {
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = (function () {
     function Foo() {
     }
diff --git a/tests/baselines/reference/modulePrologueAMD.js b/tests/baselines/reference/modulePrologueAMD.js
index b38e5d95f2c53..20181c24dc114 100644
--- a/tests/baselines/reference/modulePrologueAMD.js
+++ b/tests/baselines/reference/modulePrologueAMD.js
@@ -6,7 +6,7 @@ export class Foo {}
 //// [modulePrologueAMD.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = (function () {
         function Foo() {
         }
diff --git a/tests/baselines/reference/modulePrologueCommonjs.js b/tests/baselines/reference/modulePrologueCommonjs.js
index 4f465a2ae2f19..344010e5fa851 100644
--- a/tests/baselines/reference/modulePrologueCommonjs.js
+++ b/tests/baselines/reference/modulePrologueCommonjs.js
@@ -5,7 +5,7 @@ export class Foo {}
 
 //// [modulePrologueCommonjs.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = (function () {
     function Foo() {
     }
diff --git a/tests/baselines/reference/modulePrologueUmd.js b/tests/baselines/reference/modulePrologueUmd.js
index c9b8c331bcf14..44815d296de0a 100644
--- a/tests/baselines/reference/modulePrologueUmd.js
+++ b/tests/baselines/reference/modulePrologueUmd.js
@@ -14,7 +14,7 @@ export class Foo {}
     }
 })(function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = (function () {
         function Foo() {
         }
diff --git a/tests/baselines/reference/moduleResolutionNoResolve.js b/tests/baselines/reference/moduleResolutionNoResolve.js
index d1b5315903cda..0e6b206a824df 100644
--- a/tests/baselines/reference/moduleResolutionNoResolve.js
+++ b/tests/baselines/reference/moduleResolutionNoResolve.js
@@ -9,8 +9,8 @@ export var c = '';
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.c = '';
diff --git a/tests/baselines/reference/moduleResolutionNoTs.js b/tests/baselines/reference/moduleResolutionNoTs.js
index 33f692396fac6..5d2cb57e849a8 100644
--- a/tests/baselines/reference/moduleResolutionNoTs.js
+++ b/tests/baselines/reference/moduleResolutionNoTs.js
@@ -23,12 +23,12 @@ import z2 from "./z";
 
 //// [x.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = 0;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = 0;
 //// [y.jsx]
 "use strict";
-exports.__esModule = true;
-exports["default"] = 0;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = 0;
 //// [user.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions.js b/tests/baselines/reference/moduleResolutionWithExtensions.js
index c1e0310e99523..38592660c39e9 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions.js
@@ -26,16 +26,16 @@ import j from "./jquery.js"
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = 0;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = 0;
 // No extension: '.ts' added 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // '.js' extension: stripped and replaced with '.ts' 
 //// [d.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [jquery_user_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions_notSupported.js b/tests/baselines/reference/moduleResolutionWithExtensions_notSupported.js
index eb6057f969303..8069f52d83d6d 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions_notSupported.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions_notSupported.js
@@ -14,4 +14,4 @@ import js from "./js";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions_notSupported2.js b/tests/baselines/reference/moduleResolutionWithExtensions_notSupported2.js
index a11d43d56dfe3..dd21c612c58f5 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions_notSupported2.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions_notSupported2.js
@@ -10,4 +10,4 @@ import jsx from "./jsx";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions_notSupported3.js b/tests/baselines/reference/moduleResolutionWithExtensions_notSupported3.js
index ca0fa6ca402c9..92b4fe18d1d90 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions_notSupported3.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions_notSupported3.js
@@ -10,4 +10,4 @@ import jsx from "./jsx";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions_preferTs.js b/tests/baselines/reference/moduleResolutionWithExtensions_preferTs.js
index b02d23302ae76..0fa2b26ead849 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions_preferTs.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions_preferTs.js
@@ -11,8 +11,8 @@ import b from "./b";
 
 //// [index.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = 0;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = 0;
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions_unexpected.js b/tests/baselines/reference/moduleResolutionWithExtensions_unexpected.js
index 7d67bde6509b9..32f60532acc82 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions_unexpected.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions_unexpected.js
@@ -14,5 +14,5 @@ import "normalize.css";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("normalize.css");
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions_unexpected2.js b/tests/baselines/reference/moduleResolutionWithExtensions_unexpected2.js
index 0a04d8a9077d6..a9cb92ee08bdc 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions_unexpected2.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions_unexpected2.js
@@ -14,5 +14,5 @@ import "foo";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require("foo");
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions_withAmbientPresent.js b/tests/baselines/reference/moduleResolutionWithExtensions_withAmbientPresent.js
index 3563f7db251ad..fe554a0aebdb1 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions_withAmbientPresent.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions_withAmbientPresent.js
@@ -16,4 +16,4 @@ import { x } from "js";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks.js b/tests/baselines/reference/moduleResolutionWithSymlinks.js
index b483f356252be..1504ebae68574 100644
--- a/tests/baselines/reference/moduleResolutionWithSymlinks.js
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks.js
@@ -43,7 +43,7 @@ tsc app.ts # Should write to library-a/index.js, library-b/index.js, and app.js
 "use strict";
 // When symlinked files are in node_modules, they are resolved with realpath;
 // so a linked file does not create a duplicate SourceFile of the real one.
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var MyClass = (function () {
     function MyClass() {
     }
@@ -52,12 +52,12 @@ var MyClass = (function () {
 exports.MyClass = MyClass;
 //// [/src/library-b/index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var library_a_1 = require("library-a");
 exports.MyClass2 = library_a_1.MyClass;
 //// [/src/app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 var y;
 x = y;
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js b/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js
index bf51b7e3bca3e..f23f8dc70664a 100644
--- a/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks_notInNodeModules.js
@@ -18,18 +18,18 @@ x + x2;
 // When symlinked files are not in node_modules, realpath is not used.
 // A symlink file acts like the real thing. So, 2 symlinks act like 2 different files.
 // See GH#10364. 
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 0;
 //// [/src/bin/shared2/abc.js]
 "use strict";
 // When symlinked files are not in node_modules, realpath is not used.
 // A symlink file acts like the real thing. So, 2 symlinks act like 2 different files.
 // See GH#10364. 
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 0;
 //// [/src/bin/app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var abc_1 = require("./shared/abc");
 var abc_2 = require("./shared2/abc");
 abc_1.x + abc_2.x;
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js b/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js
index 0049ad48f91eb..42209d7ebccb1 100644
--- a/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks_withOutDir.js
@@ -22,7 +22,7 @@ y = x;
 //// [/src/bin/library-a/index.js]
 "use strict";
 // Same as moduleResolutionWithSymlinks.ts, but with outDir
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var MyClass = (function () {
     function MyClass() {
     }
@@ -31,12 +31,12 @@ var MyClass = (function () {
 exports.MyClass = MyClass;
 //// [/src/bin/library-b/index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var library_a_1 = require("library-a");
 exports.MyClass2 = library_a_1.MyClass;
 //// [/src/bin/app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 var y;
 x = y;
diff --git a/tests/baselines/reference/moduleSameValueDuplicateExportedBindings1.js b/tests/baselines/reference/moduleSameValueDuplicateExportedBindings1.js
index c4d451ba9f9d3..b8500ce35592e 100644
--- a/tests/baselines/reference/moduleSameValueDuplicateExportedBindings1.js
+++ b/tests/baselines/reference/moduleSameValueDuplicateExportedBindings1.js
@@ -12,20 +12,20 @@ export var foo = 42;
 
 //// [c.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.foo = 42;
 //// [b.js]
 "use strict";
 function __export(m) {
     for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
 }
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 __export(require("./c"));
 //// [a.js]
 "use strict";
 function __export(m) {
     for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
 }
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 __export(require("./b"));
 __export(require("./c"));
diff --git a/tests/baselines/reference/moduleSameValueDuplicateExportedBindings2.js b/tests/baselines/reference/moduleSameValueDuplicateExportedBindings2.js
index d1f6dc7abc7cf..dbc8010a951e1 100644
--- a/tests/baselines/reference/moduleSameValueDuplicateExportedBindings2.js
+++ b/tests/baselines/reference/moduleSameValueDuplicateExportedBindings2.js
@@ -15,7 +15,7 @@ export enum Animals {
 
 //// [c.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Animals;
 (function (Animals) {
     Animals[Animals["Cat"] = 0] = "Cat";
@@ -24,7 +24,7 @@ var Animals;
 ;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var c_1 = require("./c");
 exports.Animals = c_1.Animals;
 //// [a.js]
@@ -32,6 +32,6 @@ exports.Animals = c_1.Animals;
 function __export(m) {
     for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];
 }
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 __export(require("./b"));
 __export(require("./c"));
diff --git a/tests/baselines/reference/moduleScoping.js b/tests/baselines/reference/moduleScoping.js
index 601d7e41fcde0..131dcbb9d29a8 100644
--- a/tests/baselines/reference/moduleScoping.js
+++ b/tests/baselines/reference/moduleScoping.js
@@ -29,12 +29,12 @@ var v2 = 42; // Global scope
 var v4 = function () { return 5; };
 //// [file3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.v3 = true;
 var v2 = [1, 2, 3]; // Module scope. Should not appear in global scope
 //// [file4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file3 = require("./file3");
 var t1 = v1;
 var t2 = v2;
diff --git a/tests/baselines/reference/multiImportExport.js b/tests/baselines/reference/multiImportExport.js
index 07e353cb301b2..a7edfcf1789d3 100644
--- a/tests/baselines/reference/multiImportExport.js
+++ b/tests/baselines/reference/multiImportExport.js
@@ -44,11 +44,11 @@ var Math = {
 module.exports = Math;
 //// [Drawing.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.Math = require("./Math/Math");
 //// [consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Drawing = require("./Drawing");
 var addr = new Drawing.Math.Adder();
 
diff --git a/tests/baselines/reference/multipleExportDefault1.js b/tests/baselines/reference/multipleExportDefault1.js
index 8375c2f9e6f3e..1c0b9a116d459 100644
--- a/tests/baselines/reference/multipleExportDefault1.js
+++ b/tests/baselines/reference/multipleExportDefault1.js
@@ -10,10 +10,10 @@ export default {
 
 //// [multipleExportDefault1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function Foo() {
 }
-exports["default"] = Foo;
-exports["default"] = {
+exports.default = Foo;
+exports.default = {
     uhoh: "another default"
 };
diff --git a/tests/baselines/reference/multipleExportDefault2.js b/tests/baselines/reference/multipleExportDefault2.js
index 0c06385f9af46..591ec52e8d3f0 100644
--- a/tests/baselines/reference/multipleExportDefault2.js
+++ b/tests/baselines/reference/multipleExportDefault2.js
@@ -9,9 +9,9 @@ export default function Foo() { }
 
 //// [multipleExportDefault2.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = {
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = {
     uhoh: "another default"
 };
 function Foo() { }
-exports["default"] = Foo;
+exports.default = Foo;
diff --git a/tests/baselines/reference/multipleExportDefault3.js b/tests/baselines/reference/multipleExportDefault3.js
index 1091af16301ec..0ee80afa0fd00 100644
--- a/tests/baselines/reference/multipleExportDefault3.js
+++ b/tests/baselines/reference/multipleExportDefault3.js
@@ -9,8 +9,8 @@ export default class C { }
 
 //// [multipleExportDefault3.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = {
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = {
     uhoh: "another default"
 };
 var C = (function () {
@@ -18,4 +18,4 @@ var C = (function () {
     }
     return C;
 }());
-exports["default"] = C;
+exports.default = C;
diff --git a/tests/baselines/reference/multipleExportDefault4.js b/tests/baselines/reference/multipleExportDefault4.js
index b3e0ef3e87069..9f20ca303e810 100644
--- a/tests/baselines/reference/multipleExportDefault4.js
+++ b/tests/baselines/reference/multipleExportDefault4.js
@@ -7,13 +7,13 @@ export default {
 
 //// [multipleExportDefault4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
     return C;
 }());
-exports["default"] = C;
-exports["default"] = {
+exports.default = C;
+exports.default = {
     uhoh: "another default"
 };
diff --git a/tests/baselines/reference/multipleExportDefault5.js b/tests/baselines/reference/multipleExportDefault5.js
index a5032e45244c8..715943c128601 100644
--- a/tests/baselines/reference/multipleExportDefault5.js
+++ b/tests/baselines/reference/multipleExportDefault5.js
@@ -4,12 +4,12 @@ export default class C {}
 
 //// [multipleExportDefault5.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function bar() { }
-exports["default"] = bar;
+exports.default = bar;
 var C = (function () {
     function C() {
     }
     return C;
 }());
-exports["default"] = C;
+exports.default = C;
diff --git a/tests/baselines/reference/multipleExportDefault6.js b/tests/baselines/reference/multipleExportDefault6.js
index aa372e4d4105c..9fcd61a6ef394 100644
--- a/tests/baselines/reference/multipleExportDefault6.js
+++ b/tests/baselines/reference/multipleExportDefault6.js
@@ -9,10 +9,10 @@ export default {
 
 //// [multipleExportDefault6.js]
 "use strict";
-exports.__esModule = true;
-exports["default"] = {
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.default = {
     lol: 1
 };
-exports["default"] = {
+exports.default = {
     lol: 2
 };
diff --git a/tests/baselines/reference/multipleExports.js b/tests/baselines/reference/multipleExports.js
index 284b24ef4f9e0..fea958d853d2e 100644
--- a/tests/baselines/reference/multipleExports.js
+++ b/tests/baselines/reference/multipleExports.js
@@ -13,7 +13,7 @@ export module M {
 
 //// [multipleExports.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var M;
 (function (M) {
     M.v = 0;
diff --git a/tests/baselines/reference/nameDelimitedBySlashes.js b/tests/baselines/reference/nameDelimitedBySlashes.js
index 149b6a0d59f8d..fcf9a02e6e454 100644
--- a/tests/baselines/reference/nameDelimitedBySlashes.js
+++ b/tests/baselines/reference/nameDelimitedBySlashes.js
@@ -10,10 +10,10 @@ var x = foo.foo + 42;
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.foo = 42;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./test/foo_0");
 var x = foo.foo + 42;
diff --git a/tests/baselines/reference/nameWithFileExtension.js b/tests/baselines/reference/nameWithFileExtension.js
index 3c1cf8dce663d..48a9bff208d1b 100644
--- a/tests/baselines/reference/nameWithFileExtension.js
+++ b/tests/baselines/reference/nameWithFileExtension.js
@@ -10,10 +10,10 @@ var x = foo.foo + 42;
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.foo = 42;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./foo_0.js");
 var x = foo.foo + 42;
diff --git a/tests/baselines/reference/nameWithRelativePaths.js b/tests/baselines/reference/nameWithRelativePaths.js
index d070638417bdd..d89189a26f651 100644
--- a/tests/baselines/reference/nameWithRelativePaths.js
+++ b/tests/baselines/reference/nameWithRelativePaths.js
@@ -25,25 +25,25 @@ if(foo2.M2.x){
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.foo = 42;
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function f() {
     return 42;
 }
 exports.f = f;
 //// [foo_2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var M2;
 (function (M2) {
     M2.x = true;
 })(M2 = exports.M2 || (exports.M2 = {}));
 //// [foo_3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo0 = require("../foo_0");
 var foo1 = require("./test/foo_1");
 var foo2 = require("./.././test/foo_2");
diff --git a/tests/baselines/reference/narrowingConstrainedTypeParameter.js b/tests/baselines/reference/narrowingConstrainedTypeParameter.js
index a29468388516a..8293bd8d71ca3 100644
--- a/tests/baselines/reference/narrowingConstrainedTypeParameter.js
+++ b/tests/baselines/reference/narrowingConstrainedTypeParameter.js
@@ -19,7 +19,7 @@ export function speak<TPet extends Pet>(pet: TPet, voice: (pet: TPet) => string)
 //// [narrowingConstrainedTypeParameter.js]
 "use strict";
 // Repro from #10811
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function isPet(pet) {
     return typeof pet.name === "string";
 }
diff --git a/tests/baselines/reference/nestedClassDeclaration.js b/tests/baselines/reference/nestedClassDeclaration.js
index cc300ec75a31c..04e2f6348efb6 100644
--- a/tests/baselines/reference/nestedClassDeclaration.js
+++ b/tests/baselines/reference/nestedClassDeclaration.js
@@ -38,5 +38,5 @@ function foo() {
     }());
 }
 var x = {
-    "class": C4
+    class: C4
 }, _a = void 0;
diff --git a/tests/baselines/reference/newOperator.errors.txt b/tests/baselines/reference/newOperator.errors.txt
index ae96023a60b76..484454b10a03f 100644
--- a/tests/baselines/reference/newOperator.errors.txt
+++ b/tests/baselines/reference/newOperator.errors.txt
@@ -8,11 +8,10 @@ tests/cases/compiler/newOperator.ts(21,1): error TS2693: 'string' only refers to
 tests/cases/compiler/newOperator.ts(22,1): error TS1150: 'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead.
 tests/cases/compiler/newOperator.ts(28,13): error TS2304: Cannot find name 'q'.
 tests/cases/compiler/newOperator.ts(31,10): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
-tests/cases/compiler/newOperator.ts(44,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/newOperator.ts(45,23): error TS1150: 'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead.
 
 
-==== tests/cases/compiler/newOperator.ts (12 errors) ====
+==== tests/cases/compiler/newOperator.ts (11 errors) ====
     interface ifc { }
     // Attempting to 'new' an interface yields poor error
     var i = new ifc();
@@ -78,8 +77,6 @@ tests/cases/compiler/newOperator.ts(45,23): error TS1150: 'new T[]' cannot be us
     
     class S {
         public get xs(): M.T[] {
-                   ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return new M.T[];
                           ~~
 !!! error TS1150: 'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead.
diff --git a/tests/baselines/reference/newWithSpread.errors.txt b/tests/baselines/reference/newWithSpread.errors.txt
deleted file mode 100644
index e91a6757ead3e..0000000000000
--- a/tests/baselines/reference/newWithSpread.errors.txt
+++ /dev/null
@@ -1,177 +0,0 @@
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(36,13): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(37,13): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(40,8): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(41,13): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(45,13): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(46,13): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(50,15): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(51,15): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(55,17): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(56,17): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(60,18): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(61,18): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(65,22): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(66,22): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(70,13): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(71,13): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(75,20): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(76,20): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(80,22): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(81,22): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(85,23): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(86,23): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(90,27): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(91,27): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(95,23): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/functionCalls/newWithSpread.ts(96,23): error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/expressions/functionCalls/newWithSpread.ts (26 errors) ====
-    function f(x: number, y: number, ...z: string[]) {
-    }
-    
-    function f2(...x: string[]) {
-    }
-    
-    interface A {
-        f: {
-            new (x: number, y: number, ...z: string[]);
-        }
-    }
-    
-    class B {
-        constructor(x: number, y: number, ...z: string[]) {}
-    }
-    
-    interface C {
-        "a-b": typeof B;
-    }
-    
-    interface D {
-        1: typeof B;
-    }
-    
-    var a: string[];
-    var b: A;
-    var c: C;
-    var d: A[];
-    var e: { [key: string]: A };
-    var g: C[];
-    var h: { [key: string]: C };
-    var i: C[][];
-    
-    // Basic expression
-    new f(1, 2, "string");
-    new f(1, 2, ...a);
-                ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new f(1, 2, ...a, "string");
-                ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Multiple spreads arguments
-    new f2(...a, ...a);
-           ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new f(1 ,2, ...a, ...a);
-                ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Call expression
-    new f(1, 2, "string")();
-    new f(1, 2, ...a)();
-                ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new f(1, 2, ...a, "string")();
-                ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Property access expression
-    new b.f(1, 2, "string");
-    new b.f(1, 2, ...a);
-                  ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new b.f(1, 2, ...a, "string"); 
-                  ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Parenthesised expression
-    new (b.f)(1, 2, "string");
-    new (b.f)(1, 2, ...a);
-                    ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new (b.f)(1, 2, ...a, "string"); 
-                    ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Element access expression
-    new d[1].f(1, 2, "string");
-    new d[1].f(1, 2, ...a);
-                     ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new d[1].f(1, 2, ...a, "string");
-                     ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Element access expression with a punctuated key
-    new e["a-b"].f(1, 2, "string");
-    new e["a-b"].f(1, 2, ...a);
-                         ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new e["a-b"].f(1, 2, ...a, "string");
-                         ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Basic expression
-    new B(1, 2, "string");
-    new B(1, 2, ...a);
-                ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new B(1, 2, ...a, "string");
-                ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Property access expression
-    new c["a-b"](1, 2, "string");
-    new c["a-b"](1, 2, ...a);
-                       ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new c["a-b"](1, 2, ...a, "string");
-                       ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Parenthesised expression
-    new (c["a-b"])(1, 2, "string");
-    new (c["a-b"])(1, 2, ...a);
-                         ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new (c["a-b"])(1, 2, ...a, "string");
-                         ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Element access expression
-    new g[1]["a-b"](1, 2, "string");
-    new g[1]["a-b"](1, 2, ...a);
-                          ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new g[1]["a-b"](1, 2, ...a, "string");
-                          ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Element access expression with a punctuated key
-    new h["a-b"]["a-b"](1, 2, "string");
-    new h["a-b"]["a-b"](1, 2, ...a);
-                              ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new h["a-b"]["a-b"](1, 2, ...a, "string");
-                              ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    
-    // Element access expression with a number
-    new i["a-b"][1](1, 2, "string");
-    new i["a-b"][1](1, 2, ...a);
-                          ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
-    new i["a-b"][1](1, 2, ...a, "string");
-                          ~~~~
-!!! error TS2472: Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/newWithSpread.symbols b/tests/baselines/reference/newWithSpread.symbols
new file mode 100644
index 0000000000000..564d49912c2a6
--- /dev/null
+++ b/tests/baselines/reference/newWithSpread.symbols
@@ -0,0 +1,273 @@
+=== tests/cases/conformance/expressions/functionCalls/newWithSpread.ts ===
+function f(x: number, y: number, ...z: string[]) {
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+>x : Symbol(x, Decl(newWithSpread.ts, 0, 11))
+>y : Symbol(y, Decl(newWithSpread.ts, 0, 21))
+>z : Symbol(z, Decl(newWithSpread.ts, 0, 32))
+}
+
+function f2(...x: string[]) {
+>f2 : Symbol(f2, Decl(newWithSpread.ts, 1, 1))
+>x : Symbol(x, Decl(newWithSpread.ts, 3, 12))
+}
+
+interface A {
+>A : Symbol(A, Decl(newWithSpread.ts, 4, 1))
+
+    f: {
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+
+        new (x: number, y: number, ...z: string[]);
+>x : Symbol(x, Decl(newWithSpread.ts, 8, 13))
+>y : Symbol(y, Decl(newWithSpread.ts, 8, 23))
+>z : Symbol(z, Decl(newWithSpread.ts, 8, 34))
+    }
+}
+
+class B {
+>B : Symbol(B, Decl(newWithSpread.ts, 10, 1))
+
+    constructor(x: number, y: number, ...z: string[]) {}
+>x : Symbol(x, Decl(newWithSpread.ts, 13, 16))
+>y : Symbol(y, Decl(newWithSpread.ts, 13, 26))
+>z : Symbol(z, Decl(newWithSpread.ts, 13, 37))
+}
+
+interface C {
+>C : Symbol(C, Decl(newWithSpread.ts, 14, 1))
+
+    "a-b": typeof B;
+>B : Symbol(B, Decl(newWithSpread.ts, 10, 1))
+}
+
+interface D {
+>D : Symbol(D, Decl(newWithSpread.ts, 18, 1))
+
+    1: typeof B;
+>B : Symbol(B, Decl(newWithSpread.ts, 10, 1))
+}
+
+var a: string[];
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+var b: A;
+>b : Symbol(b, Decl(newWithSpread.ts, 25, 3))
+>A : Symbol(A, Decl(newWithSpread.ts, 4, 1))
+
+var c: C;
+>c : Symbol(c, Decl(newWithSpread.ts, 26, 3))
+>C : Symbol(C, Decl(newWithSpread.ts, 14, 1))
+
+var d: A[];
+>d : Symbol(d, Decl(newWithSpread.ts, 27, 3))
+>A : Symbol(A, Decl(newWithSpread.ts, 4, 1))
+
+var e: { [key: string]: A };
+>e : Symbol(e, Decl(newWithSpread.ts, 28, 3))
+>key : Symbol(key, Decl(newWithSpread.ts, 28, 10))
+>A : Symbol(A, Decl(newWithSpread.ts, 4, 1))
+
+var g: C[];
+>g : Symbol(g, Decl(newWithSpread.ts, 29, 3))
+>C : Symbol(C, Decl(newWithSpread.ts, 14, 1))
+
+var h: { [key: string]: C };
+>h : Symbol(h, Decl(newWithSpread.ts, 30, 3))
+>key : Symbol(key, Decl(newWithSpread.ts, 30, 10))
+>C : Symbol(C, Decl(newWithSpread.ts, 14, 1))
+
+var i: C[][];
+>i : Symbol(i, Decl(newWithSpread.ts, 31, 3))
+>C : Symbol(C, Decl(newWithSpread.ts, 14, 1))
+
+// Basic expression
+new f(1, 2, "string");
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+
+new f(1, 2, ...a);
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new f(1, 2, ...a, "string");
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Multiple spreads arguments
+new f2(...a, ...a);
+>f2 : Symbol(f2, Decl(newWithSpread.ts, 1, 1))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new f(1 ,2, ...a, ...a);
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Call expression
+new f(1, 2, "string")();
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+
+new f(1, 2, ...a)();
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new f(1, 2, ...a, "string")();
+>f : Symbol(f, Decl(newWithSpread.ts, 0, 0))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Property access expression
+new b.f(1, 2, "string");
+>b.f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>b : Symbol(b, Decl(newWithSpread.ts, 25, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+
+new b.f(1, 2, ...a);
+>b.f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>b : Symbol(b, Decl(newWithSpread.ts, 25, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new b.f(1, 2, ...a, "string"); 
+>b.f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>b : Symbol(b, Decl(newWithSpread.ts, 25, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Parenthesised expression
+new (b.f)(1, 2, "string");
+>b.f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>b : Symbol(b, Decl(newWithSpread.ts, 25, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+
+new (b.f)(1, 2, ...a);
+>b.f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>b : Symbol(b, Decl(newWithSpread.ts, 25, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new (b.f)(1, 2, ...a, "string"); 
+>b.f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>b : Symbol(b, Decl(newWithSpread.ts, 25, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Element access expression
+new d[1].f(1, 2, "string");
+>d[1].f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>d : Symbol(d, Decl(newWithSpread.ts, 27, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+
+new d[1].f(1, 2, ...a);
+>d[1].f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>d : Symbol(d, Decl(newWithSpread.ts, 27, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new d[1].f(1, 2, ...a, "string");
+>d[1].f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>d : Symbol(d, Decl(newWithSpread.ts, 27, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Element access expression with a punctuated key
+new e["a-b"].f(1, 2, "string");
+>e["a-b"].f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>e : Symbol(e, Decl(newWithSpread.ts, 28, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+
+new e["a-b"].f(1, 2, ...a);
+>e["a-b"].f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>e : Symbol(e, Decl(newWithSpread.ts, 28, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new e["a-b"].f(1, 2, ...a, "string");
+>e["a-b"].f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>e : Symbol(e, Decl(newWithSpread.ts, 28, 3))
+>f : Symbol(A.f, Decl(newWithSpread.ts, 6, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Basic expression
+new B(1, 2, "string");
+>B : Symbol(B, Decl(newWithSpread.ts, 10, 1))
+
+new B(1, 2, ...a);
+>B : Symbol(B, Decl(newWithSpread.ts, 10, 1))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new B(1, 2, ...a, "string");
+>B : Symbol(B, Decl(newWithSpread.ts, 10, 1))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Property access expression
+new c["a-b"](1, 2, "string");
+>c : Symbol(c, Decl(newWithSpread.ts, 26, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+
+new c["a-b"](1, 2, ...a);
+>c : Symbol(c, Decl(newWithSpread.ts, 26, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new c["a-b"](1, 2, ...a, "string");
+>c : Symbol(c, Decl(newWithSpread.ts, 26, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Parenthesised expression
+new (c["a-b"])(1, 2, "string");
+>c : Symbol(c, Decl(newWithSpread.ts, 26, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+
+new (c["a-b"])(1, 2, ...a);
+>c : Symbol(c, Decl(newWithSpread.ts, 26, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new (c["a-b"])(1, 2, ...a, "string");
+>c : Symbol(c, Decl(newWithSpread.ts, 26, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Element access expression
+new g[1]["a-b"](1, 2, "string");
+>g : Symbol(g, Decl(newWithSpread.ts, 29, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+
+new g[1]["a-b"](1, 2, ...a);
+>g : Symbol(g, Decl(newWithSpread.ts, 29, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new g[1]["a-b"](1, 2, ...a, "string");
+>g : Symbol(g, Decl(newWithSpread.ts, 29, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Element access expression with a punctuated key
+new h["a-b"]["a-b"](1, 2, "string");
+>h : Symbol(h, Decl(newWithSpread.ts, 30, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+
+new h["a-b"]["a-b"](1, 2, ...a);
+>h : Symbol(h, Decl(newWithSpread.ts, 30, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new h["a-b"]["a-b"](1, 2, ...a, "string");
+>h : Symbol(h, Decl(newWithSpread.ts, 30, 3))
+>"a-b" : Symbol(C["a-b"], Decl(newWithSpread.ts, 16, 13))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+// Element access expression with a number
+new i["a-b"][1](1, 2, "string");
+>i : Symbol(i, Decl(newWithSpread.ts, 31, 3))
+
+new i["a-b"][1](1, 2, ...a);
+>i : Symbol(i, Decl(newWithSpread.ts, 31, 3))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
+new i["a-b"][1](1, 2, ...a, "string");
+>i : Symbol(i, Decl(newWithSpread.ts, 31, 3))
+>a : Symbol(a, Decl(newWithSpread.ts, 24, 3))
+
diff --git a/tests/baselines/reference/newWithSpread.types b/tests/baselines/reference/newWithSpread.types
new file mode 100644
index 0000000000000..67cc63e6281b1
--- /dev/null
+++ b/tests/baselines/reference/newWithSpread.types
@@ -0,0 +1,494 @@
+=== tests/cases/conformance/expressions/functionCalls/newWithSpread.ts ===
+function f(x: number, y: number, ...z: string[]) {
+>f : (x: number, y: number, ...z: string[]) => void
+>x : number
+>y : number
+>z : string[]
+}
+
+function f2(...x: string[]) {
+>f2 : (...x: string[]) => void
+>x : string[]
+}
+
+interface A {
+>A : A
+
+    f: {
+>f : new (x: number, y: number, ...z: string[]) => any
+
+        new (x: number, y: number, ...z: string[]);
+>x : number
+>y : number
+>z : string[]
+    }
+}
+
+class B {
+>B : B
+
+    constructor(x: number, y: number, ...z: string[]) {}
+>x : number
+>y : number
+>z : string[]
+}
+
+interface C {
+>C : C
+
+    "a-b": typeof B;
+>B : typeof B
+}
+
+interface D {
+>D : D
+
+    1: typeof B;
+>B : typeof B
+}
+
+var a: string[];
+>a : string[]
+
+var b: A;
+>b : A
+>A : A
+
+var c: C;
+>c : C
+>C : C
+
+var d: A[];
+>d : A[]
+>A : A
+
+var e: { [key: string]: A };
+>e : { [key: string]: A; }
+>key : string
+>A : A
+
+var g: C[];
+>g : C[]
+>C : C
+
+var h: { [key: string]: C };
+>h : { [key: string]: C; }
+>key : string
+>C : C
+
+var i: C[][];
+>i : C[][]
+>C : C
+
+// Basic expression
+new f(1, 2, "string");
+>new f(1, 2, "string") : any
+>f : (x: number, y: number, ...z: string[]) => void
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new f(1, 2, ...a);
+>new f(1, 2, ...a) : any
+>f : (x: number, y: number, ...z: string[]) => void
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new f(1, 2, ...a, "string");
+>new f(1, 2, ...a, "string") : any
+>f : (x: number, y: number, ...z: string[]) => void
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Multiple spreads arguments
+new f2(...a, ...a);
+>new f2(...a, ...a) : any
+>f2 : (...x: string[]) => void
+>...a : string
+>a : string[]
+>...a : string
+>a : string[]
+
+new f(1 ,2, ...a, ...a);
+>new f(1 ,2, ...a, ...a) : any
+>f : (x: number, y: number, ...z: string[]) => void
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>...a : string
+>a : string[]
+
+// Call expression
+new f(1, 2, "string")();
+>new f(1, 2, "string")() : any
+>new f(1, 2, "string") : any
+>f : (x: number, y: number, ...z: string[]) => void
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new f(1, 2, ...a)();
+>new f(1, 2, ...a)() : any
+>new f(1, 2, ...a) : any
+>f : (x: number, y: number, ...z: string[]) => void
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new f(1, 2, ...a, "string")();
+>new f(1, 2, ...a, "string")() : any
+>new f(1, 2, ...a, "string") : any
+>f : (x: number, y: number, ...z: string[]) => void
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Property access expression
+new b.f(1, 2, "string");
+>new b.f(1, 2, "string") : any
+>b.f : new (x: number, y: number, ...z: string[]) => any
+>b : A
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new b.f(1, 2, ...a);
+>new b.f(1, 2, ...a) : any
+>b.f : new (x: number, y: number, ...z: string[]) => any
+>b : A
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new b.f(1, 2, ...a, "string"); 
+>new b.f(1, 2, ...a, "string") : any
+>b.f : new (x: number, y: number, ...z: string[]) => any
+>b : A
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Parenthesised expression
+new (b.f)(1, 2, "string");
+>new (b.f)(1, 2, "string") : any
+>(b.f) : new (x: number, y: number, ...z: string[]) => any
+>b.f : new (x: number, y: number, ...z: string[]) => any
+>b : A
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new (b.f)(1, 2, ...a);
+>new (b.f)(1, 2, ...a) : any
+>(b.f) : new (x: number, y: number, ...z: string[]) => any
+>b.f : new (x: number, y: number, ...z: string[]) => any
+>b : A
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new (b.f)(1, 2, ...a, "string"); 
+>new (b.f)(1, 2, ...a, "string") : any
+>(b.f) : new (x: number, y: number, ...z: string[]) => any
+>b.f : new (x: number, y: number, ...z: string[]) => any
+>b : A
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Element access expression
+new d[1].f(1, 2, "string");
+>new d[1].f(1, 2, "string") : any
+>d[1].f : new (x: number, y: number, ...z: string[]) => any
+>d[1] : A
+>d : A[]
+>1 : 1
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new d[1].f(1, 2, ...a);
+>new d[1].f(1, 2, ...a) : any
+>d[1].f : new (x: number, y: number, ...z: string[]) => any
+>d[1] : A
+>d : A[]
+>1 : 1
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new d[1].f(1, 2, ...a, "string");
+>new d[1].f(1, 2, ...a, "string") : any
+>d[1].f : new (x: number, y: number, ...z: string[]) => any
+>d[1] : A
+>d : A[]
+>1 : 1
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Element access expression with a punctuated key
+new e["a-b"].f(1, 2, "string");
+>new e["a-b"].f(1, 2, "string") : any
+>e["a-b"].f : new (x: number, y: number, ...z: string[]) => any
+>e["a-b"] : A
+>e : { [key: string]: A; }
+>"a-b" : "a-b"
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new e["a-b"].f(1, 2, ...a);
+>new e["a-b"].f(1, 2, ...a) : any
+>e["a-b"].f : new (x: number, y: number, ...z: string[]) => any
+>e["a-b"] : A
+>e : { [key: string]: A; }
+>"a-b" : "a-b"
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new e["a-b"].f(1, 2, ...a, "string");
+>new e["a-b"].f(1, 2, ...a, "string") : any
+>e["a-b"].f : new (x: number, y: number, ...z: string[]) => any
+>e["a-b"] : A
+>e : { [key: string]: A; }
+>"a-b" : "a-b"
+>f : new (x: number, y: number, ...z: string[]) => any
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Basic expression
+new B(1, 2, "string");
+>new B(1, 2, "string") : B
+>B : typeof B
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new B(1, 2, ...a);
+>new B(1, 2, ...a) : B
+>B : typeof B
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new B(1, 2, ...a, "string");
+>new B(1, 2, ...a, "string") : B
+>B : typeof B
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Property access expression
+new c["a-b"](1, 2, "string");
+>new c["a-b"](1, 2, "string") : B
+>c["a-b"] : typeof B
+>c : C
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new c["a-b"](1, 2, ...a);
+>new c["a-b"](1, 2, ...a) : B
+>c["a-b"] : typeof B
+>c : C
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new c["a-b"](1, 2, ...a, "string");
+>new c["a-b"](1, 2, ...a, "string") : B
+>c["a-b"] : typeof B
+>c : C
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Parenthesised expression
+new (c["a-b"])(1, 2, "string");
+>new (c["a-b"])(1, 2, "string") : B
+>(c["a-b"]) : typeof B
+>c["a-b"] : typeof B
+>c : C
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new (c["a-b"])(1, 2, ...a);
+>new (c["a-b"])(1, 2, ...a) : B
+>(c["a-b"]) : typeof B
+>c["a-b"] : typeof B
+>c : C
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new (c["a-b"])(1, 2, ...a, "string");
+>new (c["a-b"])(1, 2, ...a, "string") : B
+>(c["a-b"]) : typeof B
+>c["a-b"] : typeof B
+>c : C
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Element access expression
+new g[1]["a-b"](1, 2, "string");
+>new g[1]["a-b"](1, 2, "string") : B
+>g[1]["a-b"] : typeof B
+>g[1] : C
+>g : C[]
+>1 : 1
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new g[1]["a-b"](1, 2, ...a);
+>new g[1]["a-b"](1, 2, ...a) : B
+>g[1]["a-b"] : typeof B
+>g[1] : C
+>g : C[]
+>1 : 1
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new g[1]["a-b"](1, 2, ...a, "string");
+>new g[1]["a-b"](1, 2, ...a, "string") : B
+>g[1]["a-b"] : typeof B
+>g[1] : C
+>g : C[]
+>1 : 1
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Element access expression with a punctuated key
+new h["a-b"]["a-b"](1, 2, "string");
+>new h["a-b"]["a-b"](1, 2, "string") : B
+>h["a-b"]["a-b"] : typeof B
+>h["a-b"] : C
+>h : { [key: string]: C; }
+>"a-b" : "a-b"
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new h["a-b"]["a-b"](1, 2, ...a);
+>new h["a-b"]["a-b"](1, 2, ...a) : B
+>h["a-b"]["a-b"] : typeof B
+>h["a-b"] : C
+>h : { [key: string]: C; }
+>"a-b" : "a-b"
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new h["a-b"]["a-b"](1, 2, ...a, "string");
+>new h["a-b"]["a-b"](1, 2, ...a, "string") : B
+>h["a-b"]["a-b"] : typeof B
+>h["a-b"] : C
+>h : { [key: string]: C; }
+>"a-b" : "a-b"
+>"a-b" : "a-b"
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
+// Element access expression with a number
+new i["a-b"][1](1, 2, "string");
+>new i["a-b"][1](1, 2, "string") : any
+>i["a-b"][1] : any
+>i["a-b"] : any
+>i : C[][]
+>"a-b" : "a-b"
+>1 : 1
+>1 : 1
+>2 : 2
+>"string" : "string"
+
+new i["a-b"][1](1, 2, ...a);
+>new i["a-b"][1](1, 2, ...a) : any
+>i["a-b"][1] : any
+>i["a-b"] : any
+>i : C[][]
+>"a-b" : "a-b"
+>1 : 1
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+
+new i["a-b"][1](1, 2, ...a, "string");
+>new i["a-b"][1](1, 2, ...a, "string") : any
+>i["a-b"][1] : any
+>i["a-b"] : any
+>i : C[][]
+>"a-b" : "a-b"
+>1 : 1
+>1 : 1
+>2 : 2
+>...a : string
+>a : string[]
+>"string" : "string"
+
diff --git a/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.errors.txt b/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.errors.txt
deleted file mode 100644
index 2d322853cfec3..0000000000000
--- a/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.errors.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-tests/cases/compiler/noCollisionThisExpressionAndLocalVarInAccessors.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/noCollisionThisExpressionAndLocalVarInAccessors.ts(12,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/noCollisionThisExpressionAndLocalVarInAccessors.ts(24,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/noCollisionThisExpressionAndLocalVarInAccessors.ts(34,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/noCollisionThisExpressionAndLocalVarInAccessors.ts (4 errors) ====
-    class class1 {
-        get a(): number {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x2 = {
-                doStuff: (callback) => () => {
-                    var _this = 2;
-                    return callback(_this);
-                }
-            }
-    
-            return 10;
-        }
-        set a(val: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x2 = {
-                doStuff: (callback) => () => {
-                    var _this = 2;
-                    return callback(_this);
-                }
-            }
-    
-        }
-    }
-    
-    class class2 {
-        get a(): number {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var _this = 2;
-            var x2 = {
-                doStuff: (callback) => () => {
-                    return callback(_this);
-                }
-            }
-    
-            return 10;
-        }
-        set a(val: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var _this = 2;
-            var x2 = {
-                doStuff: (callback) => () => {
-                    return callback(_this);
-                }
-            }
-    
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.symbols b/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.symbols
new file mode 100644
index 0000000000000..b534c8cadf41b
--- /dev/null
+++ b/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.symbols
@@ -0,0 +1,94 @@
+=== tests/cases/compiler/noCollisionThisExpressionAndLocalVarInAccessors.ts ===
+class class1 {
+>class1 : Symbol(class1, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 0, 0))
+
+    get a(): number {
+>a : Symbol(class1.a, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 0, 14), Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 10, 5))
+
+        var x2 = {
+>x2 : Symbol(x2, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 2, 11))
+
+            doStuff: (callback) => () => {
+>doStuff : Symbol(doStuff, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 2, 18))
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 3, 22))
+
+                var _this = 2;
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 4, 19))
+
+                return callback(_this);
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 3, 22))
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 4, 19))
+            }
+        }
+
+        return 10;
+    }
+    set a(val: number) {
+>a : Symbol(class1.a, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 0, 14), Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 10, 5))
+>val : Symbol(val, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 11, 10))
+
+        var x2 = {
+>x2 : Symbol(x2, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 12, 11))
+
+            doStuff: (callback) => () => {
+>doStuff : Symbol(doStuff, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 12, 18))
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 13, 22))
+
+                var _this = 2;
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 14, 19))
+
+                return callback(_this);
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 13, 22))
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 14, 19))
+            }
+        }
+
+    }
+}
+
+class class2 {
+>class2 : Symbol(class2, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 20, 1))
+
+    get a(): number {
+>a : Symbol(class2.a, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 22, 14), Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 32, 5))
+
+        var _this = 2;
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 24, 11))
+
+        var x2 = {
+>x2 : Symbol(x2, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 25, 11))
+
+            doStuff: (callback) => () => {
+>doStuff : Symbol(doStuff, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 25, 18))
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 26, 22))
+
+                return callback(_this);
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 26, 22))
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 24, 11))
+            }
+        }
+
+        return 10;
+    }
+    set a(val: number) {
+>a : Symbol(class2.a, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 22, 14), Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 32, 5))
+>val : Symbol(val, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 33, 10))
+
+        var _this = 2;
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 34, 11))
+
+        var x2 = {
+>x2 : Symbol(x2, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 35, 11))
+
+            doStuff: (callback) => () => {
+>doStuff : Symbol(doStuff, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 35, 18))
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 36, 22))
+
+                return callback(_this);
+>callback : Symbol(callback, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 36, 22))
+>_this : Symbol(_this, Decl(noCollisionThisExpressionAndLocalVarInAccessors.ts, 34, 11))
+            }
+        }
+
+    }
+}
diff --git a/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.types b/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.types
new file mode 100644
index 0000000000000..0b394c448b315
--- /dev/null
+++ b/tests/baselines/reference/noCollisionThisExpressionAndLocalVarInAccessors.types
@@ -0,0 +1,116 @@
+=== tests/cases/compiler/noCollisionThisExpressionAndLocalVarInAccessors.ts ===
+class class1 {
+>class1 : class1
+
+    get a(): number {
+>a : number
+
+        var x2 = {
+>x2 : { doStuff: (callback: any) => () => any; }
+>{            doStuff: (callback) => () => {                var _this = 2;                return callback(_this);            }        } : { doStuff: (callback: any) => () => any; }
+
+            doStuff: (callback) => () => {
+>doStuff : (callback: any) => () => any
+>(callback) => () => {                var _this = 2;                return callback(_this);            } : (callback: any) => () => any
+>callback : any
+>() => {                var _this = 2;                return callback(_this);            } : () => any
+
+                var _this = 2;
+>_this : number
+>2 : 2
+
+                return callback(_this);
+>callback(_this) : any
+>callback : any
+>_this : number
+            }
+        }
+
+        return 10;
+>10 : 10
+    }
+    set a(val: number) {
+>a : number
+>val : number
+
+        var x2 = {
+>x2 : { doStuff: (callback: any) => () => any; }
+>{            doStuff: (callback) => () => {                var _this = 2;                return callback(_this);            }        } : { doStuff: (callback: any) => () => any; }
+
+            doStuff: (callback) => () => {
+>doStuff : (callback: any) => () => any
+>(callback) => () => {                var _this = 2;                return callback(_this);            } : (callback: any) => () => any
+>callback : any
+>() => {                var _this = 2;                return callback(_this);            } : () => any
+
+                var _this = 2;
+>_this : number
+>2 : 2
+
+                return callback(_this);
+>callback(_this) : any
+>callback : any
+>_this : number
+            }
+        }
+
+    }
+}
+
+class class2 {
+>class2 : class2
+
+    get a(): number {
+>a : number
+
+        var _this = 2;
+>_this : number
+>2 : 2
+
+        var x2 = {
+>x2 : { doStuff: (callback: any) => () => any; }
+>{            doStuff: (callback) => () => {                return callback(_this);            }        } : { doStuff: (callback: any) => () => any; }
+
+            doStuff: (callback) => () => {
+>doStuff : (callback: any) => () => any
+>(callback) => () => {                return callback(_this);            } : (callback: any) => () => any
+>callback : any
+>() => {                return callback(_this);            } : () => any
+
+                return callback(_this);
+>callback(_this) : any
+>callback : any
+>_this : number
+            }
+        }
+
+        return 10;
+>10 : 10
+    }
+    set a(val: number) {
+>a : number
+>val : number
+
+        var _this = 2;
+>_this : number
+>2 : 2
+
+        var x2 = {
+>x2 : { doStuff: (callback: any) => () => any; }
+>{            doStuff: (callback) => () => {                return callback(_this);            }        } : { doStuff: (callback: any) => () => any; }
+
+            doStuff: (callback) => () => {
+>doStuff : (callback: any) => () => any
+>(callback) => () => {                return callback(_this);            } : (callback: any) => () => any
+>callback : any
+>() => {                return callback(_this);            } : () => any
+
+                return callback(_this);
+>callback(_this) : any
+>callback : any
+>_this : number
+            }
+        }
+
+    }
+}
diff --git a/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile2.js b/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile2.js
index fc778fbda09c7..5d558f540c8bb 100644
--- a/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile2.js
+++ b/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile2.js
@@ -9,5 +9,5 @@ declare var a: number;
 
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.j = "hello"; // error
diff --git a/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile3.js b/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile3.js
index b97e6e306d7b8..db44370ee9c50 100644
--- a/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile3.js
+++ b/tests/baselines/reference/noErrorUsingImportExportModuleAugmentationInDeclarationFile3.js
@@ -10,5 +10,5 @@ export var j = "hello";  // error
 
 //// [1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.j = "hello"; // error
diff --git a/tests/baselines/reference/noImplicitAnyDestructuringInPrivateMethod.js b/tests/baselines/reference/noImplicitAnyDestructuringInPrivateMethod.js
index 63788fd860ffe..adf24860a1c72 100644
--- a/tests/baselines/reference/noImplicitAnyDestructuringInPrivateMethod.js
+++ b/tests/baselines/reference/noImplicitAnyDestructuringInPrivateMethod.js
@@ -13,7 +13,7 @@ export declare class Bar2 {
 
 //// [noImplicitAnyDestructuringInPrivateMethod.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Bar = (function () {
     function Bar() {
     }
diff --git a/tests/baselines/reference/noImplicitUseStrict_amd.js b/tests/baselines/reference/noImplicitUseStrict_amd.js
index b91eb949ef186..80e7b18a71b88 100644
--- a/tests/baselines/reference/noImplicitUseStrict_amd.js
+++ b/tests/baselines/reference/noImplicitUseStrict_amd.js
@@ -3,6 +3,6 @@ export var x = 0;
 
 //// [noImplicitUseStrict_amd.js]
 define(["require", "exports"], function (require, exports) {
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 0;
 });
diff --git a/tests/baselines/reference/noImplicitUseStrict_commonjs.js b/tests/baselines/reference/noImplicitUseStrict_commonjs.js
index 842eae22229c5..00e26b9fae12e 100644
--- a/tests/baselines/reference/noImplicitUseStrict_commonjs.js
+++ b/tests/baselines/reference/noImplicitUseStrict_commonjs.js
@@ -2,5 +2,5 @@
 export var x = 0;
 
 //// [noImplicitUseStrict_commonjs.js]
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 0;
diff --git a/tests/baselines/reference/noImplicitUseStrict_umd.js b/tests/baselines/reference/noImplicitUseStrict_umd.js
index f53d6098298ee..f702e1d33013f 100644
--- a/tests/baselines/reference/noImplicitUseStrict_umd.js
+++ b/tests/baselines/reference/noImplicitUseStrict_umd.js
@@ -11,6 +11,6 @@ export var x = 0;
         define(["require", "exports"], factory);
     }
 })(function (require, exports) {
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 0;
 });
diff --git a/tests/baselines/reference/nodeResolution1.js b/tests/baselines/reference/nodeResolution1.js
index 91f423084d84b..10bdbd9b2aa5f 100644
--- a/tests/baselines/reference/nodeResolution1.js
+++ b/tests/baselines/reference/nodeResolution1.js
@@ -8,8 +8,8 @@ import y = require("./a");
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nodeResolution2.js b/tests/baselines/reference/nodeResolution2.js
index 0d66b012ca76a..842cfc66c1ef8 100644
--- a/tests/baselines/reference/nodeResolution2.js
+++ b/tests/baselines/reference/nodeResolution2.js
@@ -8,4 +8,4 @@ import y = require("a");
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nodeResolution3.js b/tests/baselines/reference/nodeResolution3.js
index 74eeec7057bc4..7dedaf6d4c8b9 100644
--- a/tests/baselines/reference/nodeResolution3.js
+++ b/tests/baselines/reference/nodeResolution3.js
@@ -8,4 +8,4 @@ import y = require("b");
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nodeResolution4.js b/tests/baselines/reference/nodeResolution4.js
index 3285f3b8e20b9..dcfe2e782cc96 100644
--- a/tests/baselines/reference/nodeResolution4.js
+++ b/tests/baselines/reference/nodeResolution4.js
@@ -14,7 +14,7 @@ import y = require("./a");
 var x = 1;
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nodeResolution5.js b/tests/baselines/reference/nodeResolution5.js
index 3dfedea4aab02..109810a436458 100644
--- a/tests/baselines/reference/nodeResolution5.js
+++ b/tests/baselines/reference/nodeResolution5.js
@@ -11,4 +11,4 @@ import y = require("a");
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nodeResolution6.js b/tests/baselines/reference/nodeResolution6.js
index 0610c53edcf4c..3ee4da97624c6 100644
--- a/tests/baselines/reference/nodeResolution6.js
+++ b/tests/baselines/reference/nodeResolution6.js
@@ -14,4 +14,4 @@ import y = require("a");
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nodeResolution7.js b/tests/baselines/reference/nodeResolution7.js
index 118f9cd3994cc..570f6143c9318 100644
--- a/tests/baselines/reference/nodeResolution7.js
+++ b/tests/baselines/reference/nodeResolution7.js
@@ -11,4 +11,4 @@ import y = require("a");
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nodeResolution8.js b/tests/baselines/reference/nodeResolution8.js
index 59a6ee67ec8dc..0e5fbf5225b15 100644
--- a/tests/baselines/reference/nodeResolution8.js
+++ b/tests/baselines/reference/nodeResolution8.js
@@ -13,4 +13,4 @@ import y = require("a");
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/nonMergedOverloads.js b/tests/baselines/reference/nonMergedOverloads.js
index 515792feb7055..fb60c2b78ef7e 100644
--- a/tests/baselines/reference/nonMergedOverloads.js
+++ b/tests/baselines/reference/nonMergedOverloads.js
@@ -7,7 +7,7 @@ export function f() {
 
 //// [nonMergedOverloads.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f = 10;
 function f() {
 }
diff --git a/tests/baselines/reference/nounusedTypeParameterConstraint.js b/tests/baselines/reference/nounusedTypeParameterConstraint.js
index a448315fa70db..e4ca10195d77d 100644
--- a/tests/baselines/reference/nounusedTypeParameterConstraint.js
+++ b/tests/baselines/reference/nounusedTypeParameterConstraint.js
@@ -9,7 +9,7 @@ export type DomainEntityConstructor<TEntity extends IEventSourcedEntity> = { new
 
 //// [bar.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [test.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
index f532bd237559d..9f7982ec28be0 100644
--- a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
+++ b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
@@ -1,18 +1,13 @@
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(18,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(21,5): error TS2412: Property '3.0' of type 'MyNumber' is not assignable to numeric index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(23,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(26,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(36,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(50,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(68,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(79,5): error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
   Object literal may only specify known properties, and 'a' does not exist in type '{ [x: number]: string; }'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(88,9): error TS2304: Cannot find name 'Myn'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(90,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(93,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts (11 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts (6 errors) ====
     // String indexer types constrain the types of named properties in their containing type
     
     interface MyNumber extends Number {
@@ -40,13 +35,9 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
 !!! error TS2412: Property '3.0' of type 'MyNumber' is not assignable to numeric index type 'string'.
     
         get X() { // ok
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return '';
         }
         set X(v) { } // ok
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         foo() { 
             return '';
@@ -57,8 +48,6 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
     
         static foo() { } // ok
         static get X() { // ok
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 1;
         }
     }
@@ -122,13 +111,9 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
 !!! error TS2304: Cannot find name 'Myn'.
     
         get X() { 
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return '';
         },
         set X(v) { }, 
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         foo() { 
             return '';
         }
diff --git a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers01.js b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers01.js
index ec0cae158fc2b..c0de5807e568e 100644
--- a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers01.js
+++ b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers01.js
@@ -2,4 +2,4 @@
 var { while } = { while: 1 }
 
 //// [objectBindingPatternKeywordIdentifiers01.js]
-var  = { "while": 1 }["while"];
+var  = { while: 1 }.while;
diff --git a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers02.js b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers02.js
index 88f5e1b56d87f..a11af94d7757b 100644
--- a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers02.js
+++ b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers02.js
@@ -2,4 +2,4 @@
 var { while: while } = { while: 1 }
 
 //// [objectBindingPatternKeywordIdentifiers02.js]
-var _a = { "while": 1 },  = _a["while"],  = _a["while"];
+var _a = { while: 1 },  = _a.while,  = _a.while;
diff --git a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers03.js b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers03.js
index 6c9a539bb694e..edd017977ae67 100644
--- a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers03.js
+++ b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers03.js
@@ -2,4 +2,4 @@
 var { "while" } = { while: 1 }
 
 //// [objectBindingPatternKeywordIdentifiers03.js]
-var  = { "while": 1 }["while"];
+var  = { while: 1 }["while"];
diff --git a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers04.js b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers04.js
index a93e76c7e9c0c..f10a47179b883 100644
--- a/tests/baselines/reference/objectBindingPatternKeywordIdentifiers04.js
+++ b/tests/baselines/reference/objectBindingPatternKeywordIdentifiers04.js
@@ -2,4 +2,4 @@
 var { "while": while } = { while: 1 }
 
 //// [objectBindingPatternKeywordIdentifiers04.js]
-var _a = { "while": 1 },  = _a["while"],  = _a["while"];
+var _a = { while: 1 },  = _a["while"],  = _a.while;
diff --git a/tests/baselines/reference/objectIndexer.js b/tests/baselines/reference/objectIndexer.js
index c93172951e929..631439390c853 100644
--- a/tests/baselines/reference/objectIndexer.js
+++ b/tests/baselines/reference/objectIndexer.js
@@ -18,7 +18,7 @@ class Emitter {
 //// [objectIndexer.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Emitter = (function () {
         function Emitter() {
             this.listeners = {};
diff --git a/tests/baselines/reference/objectLitPropertyScoping.errors.txt b/tests/baselines/reference/objectLitPropertyScoping.errors.txt
deleted file mode 100644
index 420f8a5f192e0..0000000000000
--- a/tests/baselines/reference/objectLitPropertyScoping.errors.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-tests/cases/compiler/objectLitPropertyScoping.ts(5,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/objectLitPropertyScoping.ts(8,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/objectLitPropertyScoping.ts (2 errors) ====
-    // Should compile, x and y should not be picked up from the properties
-    
-    function makePoint(x: number, y: number) {
-        return {
-            get x() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                return x;
-            },
-            get y() {
-                ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                return y;
-            },
-            dist: function () {
-                return Math.sqrt(x * x + y * y);
-            }
-        }
-    };
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLitPropertyScoping.symbols b/tests/baselines/reference/objectLitPropertyScoping.symbols
new file mode 100644
index 0000000000000..e1686e1dc7dcc
--- /dev/null
+++ b/tests/baselines/reference/objectLitPropertyScoping.symbols
@@ -0,0 +1,37 @@
+=== tests/cases/compiler/objectLitPropertyScoping.ts ===
+// Should compile, x and y should not be picked up from the properties
+
+function makePoint(x: number, y: number) {
+>makePoint : Symbol(makePoint, Decl(objectLitPropertyScoping.ts, 0, 0))
+>x : Symbol(x, Decl(objectLitPropertyScoping.ts, 2, 19))
+>y : Symbol(y, Decl(objectLitPropertyScoping.ts, 2, 29))
+
+    return {
+        get x() {
+>x : Symbol(x, Decl(objectLitPropertyScoping.ts, 3, 12))
+
+            return x;
+>x : Symbol(x, Decl(objectLitPropertyScoping.ts, 2, 19))
+
+        },
+        get y() {
+>y : Symbol(y, Decl(objectLitPropertyScoping.ts, 6, 10))
+
+            return y;
+>y : Symbol(y, Decl(objectLitPropertyScoping.ts, 2, 29))
+
+        },
+        dist: function () {
+>dist : Symbol(dist, Decl(objectLitPropertyScoping.ts, 9, 10))
+
+            return Math.sqrt(x * x + y * y);
+>Math.sqrt : Symbol(Math.sqrt, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>sqrt : Symbol(Math.sqrt, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(objectLitPropertyScoping.ts, 2, 19))
+>x : Symbol(x, Decl(objectLitPropertyScoping.ts, 2, 19))
+>y : Symbol(y, Decl(objectLitPropertyScoping.ts, 2, 29))
+>y : Symbol(y, Decl(objectLitPropertyScoping.ts, 2, 29))
+        }
+    }
+};
diff --git a/tests/baselines/reference/objectLitPropertyScoping.types b/tests/baselines/reference/objectLitPropertyScoping.types
new file mode 100644
index 0000000000000..a0cc4e8960f44
--- /dev/null
+++ b/tests/baselines/reference/objectLitPropertyScoping.types
@@ -0,0 +1,44 @@
+=== tests/cases/compiler/objectLitPropertyScoping.ts ===
+// Should compile, x and y should not be picked up from the properties
+
+function makePoint(x: number, y: number) {
+>makePoint : (x: number, y: number) => { readonly x: number; readonly y: number; dist: () => number; }
+>x : number
+>y : number
+
+    return {
+>{        get x() {            return x;        },        get y() {            return y;        },        dist: function () {            return Math.sqrt(x * x + y * y);        }    } : { readonly x: number; readonly y: number; dist: () => number; }
+
+        get x() {
+>x : number
+
+            return x;
+>x : number
+
+        },
+        get y() {
+>y : number
+
+            return y;
+>y : number
+
+        },
+        dist: function () {
+>dist : () => number
+>function () {            return Math.sqrt(x * x + y * y);        } : () => number
+
+            return Math.sqrt(x * x + y * y);
+>Math.sqrt(x * x + y * y) : number
+>Math.sqrt : (x: number) => number
+>Math : Math
+>sqrt : (x: number) => number
+>x * x + y * y : number
+>x * x : number
+>x : number
+>x : number
+>y * y : number
+>y : number
+>y : number
+        }
+    }
+};
diff --git a/tests/baselines/reference/objectLiteralErrorsES3.errors.txt b/tests/baselines/reference/objectLiteralErrorsES3.errors.txt
deleted file mode 100644
index 99b4f5c4ae01d..0000000000000
--- a/tests/baselines/reference/objectLiteralErrorsES3.errors.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(1,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts(3,40): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts (4 errors) ====
-    var e1 = { get a() { return 4; } };
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var e2 = { set a(n) { } };
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var e3 = { get a() { return ''; }, set a(n) { } };
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralErrorsES3.symbols b/tests/baselines/reference/objectLiteralErrorsES3.symbols
new file mode 100644
index 0000000000000..266758cce4103
--- /dev/null
+++ b/tests/baselines/reference/objectLiteralErrorsES3.symbols
@@ -0,0 +1,17 @@
+=== tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts ===
+var e1 = { get a() { return 4; } };
+>e1 : Symbol(e1, Decl(objectLiteralErrorsES3.ts, 0, 3))
+>a : Symbol(a, Decl(objectLiteralErrorsES3.ts, 0, 10))
+
+var e2 = { set a(n) { } };
+>e2 : Symbol(e2, Decl(objectLiteralErrorsES3.ts, 1, 3))
+>a : Symbol(a, Decl(objectLiteralErrorsES3.ts, 1, 10))
+>n : Symbol(n, Decl(objectLiteralErrorsES3.ts, 1, 17))
+
+var e3 = { get a() { return ''; }, set a(n) { } };
+>e3 : Symbol(e3, Decl(objectLiteralErrorsES3.ts, 2, 3))
+>a : Symbol(a, Decl(objectLiteralErrorsES3.ts, 2, 10), Decl(objectLiteralErrorsES3.ts, 2, 34))
+>a : Symbol(a, Decl(objectLiteralErrorsES3.ts, 2, 10), Decl(objectLiteralErrorsES3.ts, 2, 34))
+>n : Symbol(n, Decl(objectLiteralErrorsES3.ts, 2, 41))
+
+
diff --git a/tests/baselines/reference/objectLiteralErrorsES3.types b/tests/baselines/reference/objectLiteralErrorsES3.types
new file mode 100644
index 0000000000000..c1fd00cf8bf67
--- /dev/null
+++ b/tests/baselines/reference/objectLiteralErrorsES3.types
@@ -0,0 +1,22 @@
+=== tests/cases/conformance/expressions/objectLiterals/objectLiteralErrorsES3.ts ===
+var e1 = { get a() { return 4; } };
+>e1 : { readonly a: number; }
+>{ get a() { return 4; } } : { readonly a: number; }
+>a : number
+>4 : 4
+
+var e2 = { set a(n) { } };
+>e2 : { a: any; }
+>{ set a(n) { } } : { a: any; }
+>a : any
+>n : any
+
+var e3 = { get a() { return ''; }, set a(n) { } };
+>e3 : { a: string; }
+>{ get a() { return ''; }, set a(n) { } } : { a: string; }
+>a : string
+>'' : ""
+>a : string
+>n : string
+
+
diff --git a/tests/baselines/reference/objectLiteralGettersAndSetters.errors.txt b/tests/baselines/reference/objectLiteralGettersAndSetters.errors.txt
deleted file mode 100644
index 1290859fbf9f0..0000000000000
--- a/tests/baselines/reference/objectLiteralGettersAndSetters.errors.txt
+++ /dev/null
@@ -1,188 +0,0 @@
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(2,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(2,50): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(3,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(3,50): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(4,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(4,51): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(5,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(5,49): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(6,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(6,51): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(7,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(7,50): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(18,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(22,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(26,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(30,21): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(35,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(35,62): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(36,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(36,69): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(37,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(37,59): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(38,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(38,60): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(42,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(43,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(50,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(55,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(60,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(64,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(67,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(68,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(76,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts(77,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts (34 errors) ====
-    // Get and set accessor with the same name
-    var sameName1a = { get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } };
-                           ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                     ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameName2a = { get 0.0() { return ''; }, set 0(n) { var p = n; var p: string; } };
-                           ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                     ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameName3a = { get 0x20() { return ''; }, set 3.2e1(n) { var p = n; var p: string; } };
-                           ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                      ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameName4a = { get ''() { return ''; }, set ""(n) { var p = n; var p: string; } };
-                           ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                    ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameName5a = { get '\t'() { return ''; }, set '\t'(n) { var p = n; var p: string; } };
-                           ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                      ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameName6a = { get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } };
-                           ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                     ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-    // PropertyName CallSignature{FunctionBody} is equivalent to PropertyName:function CallSignature{FunctionBody}
-    var callSig1 = { num(n: number) { return '' } };
-    var callSig1: { num: (n: number) => string; };
-    var callSig2 = { num: function (n: number) { return '' } };
-    var callSig2: { num: (n: number) => string; };
-    var callSig3 = { num: (n: number) => '' };
-    var callSig3: { num: (n: number) => string; };
-    
-    // Get accessor only, type of the property is the annotated return type of the get accessor
-    var getter1 = { get x(): string { return undefined; } };
-                        ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var getter1: { readonly x: string; }
-    
-    // Get accessor only, type of the property is the inferred return type of the get accessor
-    var getter2 = { get x() { return ''; } };
-                        ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var getter2: { readonly x: string; }
-    
-    // Set accessor only, type of the property is the param type of the set accessor
-    var setter1 = { set x(n: number) { } };
-                        ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var setter1: { x: number };
-    
-    // Set accessor only, type of the property is Any for an unannotated set accessor
-    var setter2 = { set x(n) { } };
-                        ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var setter2: { x: any };
-    
-    var anyVar: any;
-    // Get and set accessor with matching type annotations
-    var sameType1 = { get x(): string { return undefined; }, set x(n: string) { } };
-                          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                                 ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameType2 = { get x(): Array<number> { return undefined; }, set x(n: number[]) { } };
-                          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                                        ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameType3 = { get x(): any { return undefined; }, set x(n: typeof anyVar) { } };
-                          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                              ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    var sameType4 = { get x(): Date { return undefined; }, set x(n: Date) { } };
-                          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                                                               ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    
-    // Type of unannotated get accessor return type is the type annotation of the set accessor param
-    var setParamType1 = {
-        set n(x: (t: string) => void) { },
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        get n() { return (t) => {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                var p: string;
-                var p = t;
-            }
-        }
-    };
-    var setParamType2 = {
-        get n() { return (t) => {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                var p: string;
-                var p = t;
-            }
-        },
-        set n(x: (t: string) => void) { }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    };
-    
-    // Type of unannotated set accessor parameter is the return type annotation of the get accessor
-    var getParamType1 = {
-        set n(x) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var y = x;
-            var y: string;
-        },
-        get n() { return ''; }
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    };
-    var getParamType2 = {
-        get n() { return ''; },
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        set n(x) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var y = x;
-            var y: string;
-        }
-    };
-    
-    // Type of unannotated accessors is the inferred return type of the get accessor
-    var getParamType3 = {
-        get n() { return ''; },
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        set n(x) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var y = x;
-            var y: string;
-        }
-    };
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralGettersAndSetters.symbols b/tests/baselines/reference/objectLiteralGettersAndSetters.symbols
new file mode 100644
index 0000000000000..5a4250f9c8239
--- /dev/null
+++ b/tests/baselines/reference/objectLiteralGettersAndSetters.symbols
@@ -0,0 +1,256 @@
+=== tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts ===
+// Get and set accessor with the same name
+var sameName1a = { get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } };
+>sameName1a : Symbol(sameName1a, Decl(objectLiteralGettersAndSetters.ts, 1, 3))
+>a : Symbol('a', Decl(objectLiteralGettersAndSetters.ts, 1, 18), Decl(objectLiteralGettersAndSetters.ts, 1, 44))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 1, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 1, 59), Decl(objectLiteralGettersAndSetters.ts, 1, 70))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 1, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 1, 59), Decl(objectLiteralGettersAndSetters.ts, 1, 70))
+
+var sameName2a = { get 0.0() { return ''; }, set 0(n) { var p = n; var p: string; } };
+>sameName2a : Symbol(sameName2a, Decl(objectLiteralGettersAndSetters.ts, 2, 3))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 2, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 2, 59), Decl(objectLiteralGettersAndSetters.ts, 2, 70))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 2, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 2, 59), Decl(objectLiteralGettersAndSetters.ts, 2, 70))
+
+var sameName3a = { get 0x20() { return ''; }, set 3.2e1(n) { var p = n; var p: string; } };
+>sameName3a : Symbol(sameName3a, Decl(objectLiteralGettersAndSetters.ts, 3, 3))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 3, 56))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 3, 64), Decl(objectLiteralGettersAndSetters.ts, 3, 75))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 3, 56))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 3, 64), Decl(objectLiteralGettersAndSetters.ts, 3, 75))
+
+var sameName4a = { get ''() { return ''; }, set ""(n) { var p = n; var p: string; } };
+>sameName4a : Symbol(sameName4a, Decl(objectLiteralGettersAndSetters.ts, 4, 3))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 4, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 4, 59), Decl(objectLiteralGettersAndSetters.ts, 4, 70))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 4, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 4, 59), Decl(objectLiteralGettersAndSetters.ts, 4, 70))
+
+var sameName5a = { get '\t'() { return ''; }, set '\t'(n) { var p = n; var p: string; } };
+>sameName5a : Symbol(sameName5a, Decl(objectLiteralGettersAndSetters.ts, 5, 3))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 5, 55))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 5, 63), Decl(objectLiteralGettersAndSetters.ts, 5, 74))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 5, 55))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 5, 63), Decl(objectLiteralGettersAndSetters.ts, 5, 74))
+
+var sameName6a = { get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } };
+>sameName6a : Symbol(sameName6a, Decl(objectLiteralGettersAndSetters.ts, 6, 3))
+>a : Symbol('a', Decl(objectLiteralGettersAndSetters.ts, 6, 18), Decl(objectLiteralGettersAndSetters.ts, 6, 44))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 6, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 6, 59), Decl(objectLiteralGettersAndSetters.ts, 6, 70))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 6, 51))
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 6, 59), Decl(objectLiteralGettersAndSetters.ts, 6, 70))
+
+// PropertyName CallSignature{FunctionBody} is equivalent to PropertyName:function CallSignature{FunctionBody}
+var callSig1 = { num(n: number) { return '' } };
+>callSig1 : Symbol(callSig1, Decl(objectLiteralGettersAndSetters.ts, 9, 3), Decl(objectLiteralGettersAndSetters.ts, 10, 3))
+>num : Symbol(num, Decl(objectLiteralGettersAndSetters.ts, 9, 16))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 9, 21))
+
+var callSig1: { num: (n: number) => string; };
+>callSig1 : Symbol(callSig1, Decl(objectLiteralGettersAndSetters.ts, 9, 3), Decl(objectLiteralGettersAndSetters.ts, 10, 3))
+>num : Symbol(num, Decl(objectLiteralGettersAndSetters.ts, 10, 15))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 10, 22))
+
+var callSig2 = { num: function (n: number) { return '' } };
+>callSig2 : Symbol(callSig2, Decl(objectLiteralGettersAndSetters.ts, 11, 3), Decl(objectLiteralGettersAndSetters.ts, 12, 3))
+>num : Symbol(num, Decl(objectLiteralGettersAndSetters.ts, 11, 16))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 11, 32))
+
+var callSig2: { num: (n: number) => string; };
+>callSig2 : Symbol(callSig2, Decl(objectLiteralGettersAndSetters.ts, 11, 3), Decl(objectLiteralGettersAndSetters.ts, 12, 3))
+>num : Symbol(num, Decl(objectLiteralGettersAndSetters.ts, 12, 15))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 12, 22))
+
+var callSig3 = { num: (n: number) => '' };
+>callSig3 : Symbol(callSig3, Decl(objectLiteralGettersAndSetters.ts, 13, 3), Decl(objectLiteralGettersAndSetters.ts, 14, 3))
+>num : Symbol(num, Decl(objectLiteralGettersAndSetters.ts, 13, 16))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 13, 23))
+
+var callSig3: { num: (n: number) => string; };
+>callSig3 : Symbol(callSig3, Decl(objectLiteralGettersAndSetters.ts, 13, 3), Decl(objectLiteralGettersAndSetters.ts, 14, 3))
+>num : Symbol(num, Decl(objectLiteralGettersAndSetters.ts, 14, 15))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 14, 22))
+
+// Get accessor only, type of the property is the annotated return type of the get accessor
+var getter1 = { get x(): string { return undefined; } };
+>getter1 : Symbol(getter1, Decl(objectLiteralGettersAndSetters.ts, 17, 3), Decl(objectLiteralGettersAndSetters.ts, 18, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 17, 15))
+>undefined : Symbol(undefined)
+
+var getter1: { readonly x: string; }
+>getter1 : Symbol(getter1, Decl(objectLiteralGettersAndSetters.ts, 17, 3), Decl(objectLiteralGettersAndSetters.ts, 18, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 18, 14))
+
+// Get accessor only, type of the property is the inferred return type of the get accessor
+var getter2 = { get x() { return ''; } };
+>getter2 : Symbol(getter2, Decl(objectLiteralGettersAndSetters.ts, 21, 3), Decl(objectLiteralGettersAndSetters.ts, 22, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 21, 15))
+
+var getter2: { readonly x: string; }
+>getter2 : Symbol(getter2, Decl(objectLiteralGettersAndSetters.ts, 21, 3), Decl(objectLiteralGettersAndSetters.ts, 22, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 22, 14))
+
+// Set accessor only, type of the property is the param type of the set accessor
+var setter1 = { set x(n: number) { } };
+>setter1 : Symbol(setter1, Decl(objectLiteralGettersAndSetters.ts, 25, 3), Decl(objectLiteralGettersAndSetters.ts, 26, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 25, 15))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 25, 22))
+
+var setter1: { x: number };
+>setter1 : Symbol(setter1, Decl(objectLiteralGettersAndSetters.ts, 25, 3), Decl(objectLiteralGettersAndSetters.ts, 26, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 26, 14))
+
+// Set accessor only, type of the property is Any for an unannotated set accessor
+var setter2 = { set x(n) { } };
+>setter2 : Symbol(setter2, Decl(objectLiteralGettersAndSetters.ts, 29, 3), Decl(objectLiteralGettersAndSetters.ts, 30, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 29, 15))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 29, 22))
+
+var setter2: { x: any };
+>setter2 : Symbol(setter2, Decl(objectLiteralGettersAndSetters.ts, 29, 3), Decl(objectLiteralGettersAndSetters.ts, 30, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 30, 14))
+
+var anyVar: any;
+>anyVar : Symbol(anyVar, Decl(objectLiteralGettersAndSetters.ts, 32, 3))
+
+// Get and set accessor with matching type annotations
+var sameType1 = { get x(): string { return undefined; }, set x(n: string) { } };
+>sameType1 : Symbol(sameType1, Decl(objectLiteralGettersAndSetters.ts, 34, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 34, 17), Decl(objectLiteralGettersAndSetters.ts, 34, 56))
+>undefined : Symbol(undefined)
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 34, 17), Decl(objectLiteralGettersAndSetters.ts, 34, 56))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 34, 63))
+
+var sameType2 = { get x(): Array<number> { return undefined; }, set x(n: number[]) { } };
+>sameType2 : Symbol(sameType2, Decl(objectLiteralGettersAndSetters.ts, 35, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 35, 17), Decl(objectLiteralGettersAndSetters.ts, 35, 63))
+>Array : Symbol(Array, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>undefined : Symbol(undefined)
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 35, 17), Decl(objectLiteralGettersAndSetters.ts, 35, 63))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 35, 70))
+
+var sameType3 = { get x(): any { return undefined; }, set x(n: typeof anyVar) { } };
+>sameType3 : Symbol(sameType3, Decl(objectLiteralGettersAndSetters.ts, 36, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 36, 17), Decl(objectLiteralGettersAndSetters.ts, 36, 53))
+>undefined : Symbol(undefined)
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 36, 17), Decl(objectLiteralGettersAndSetters.ts, 36, 53))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 36, 60))
+>anyVar : Symbol(anyVar, Decl(objectLiteralGettersAndSetters.ts, 32, 3))
+
+var sameType4 = { get x(): Date { return undefined; }, set x(n: Date) { } };
+>sameType4 : Symbol(sameType4, Decl(objectLiteralGettersAndSetters.ts, 37, 3))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 37, 17), Decl(objectLiteralGettersAndSetters.ts, 37, 54))
+>Date : Symbol(Date, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>undefined : Symbol(undefined)
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 37, 17), Decl(objectLiteralGettersAndSetters.ts, 37, 54))
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 37, 61))
+>Date : Symbol(Date, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+// Type of unannotated get accessor return type is the type annotation of the set accessor param
+var setParamType1 = {
+>setParamType1 : Symbol(setParamType1, Decl(objectLiteralGettersAndSetters.ts, 40, 3))
+
+    set n(x: (t: string) => void) { },
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 40, 21), Decl(objectLiteralGettersAndSetters.ts, 41, 38))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 41, 10))
+>t : Symbol(t, Decl(objectLiteralGettersAndSetters.ts, 41, 14))
+
+    get n() { return (t) => {
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 40, 21), Decl(objectLiteralGettersAndSetters.ts, 41, 38))
+>t : Symbol(t, Decl(objectLiteralGettersAndSetters.ts, 42, 22))
+
+            var p: string;
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 43, 15), Decl(objectLiteralGettersAndSetters.ts, 44, 15))
+
+            var p = t;
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 43, 15), Decl(objectLiteralGettersAndSetters.ts, 44, 15))
+>t : Symbol(t, Decl(objectLiteralGettersAndSetters.ts, 42, 22))
+        }
+    }
+};
+var setParamType2 = {
+>setParamType2 : Symbol(setParamType2, Decl(objectLiteralGettersAndSetters.ts, 48, 3))
+
+    get n() { return (t) => {
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 48, 21), Decl(objectLiteralGettersAndSetters.ts, 53, 6))
+>t : Symbol(t, Decl(objectLiteralGettersAndSetters.ts, 49, 22))
+
+            var p: string;
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 50, 15), Decl(objectLiteralGettersAndSetters.ts, 51, 15))
+
+            var p = t;
+>p : Symbol(p, Decl(objectLiteralGettersAndSetters.ts, 50, 15), Decl(objectLiteralGettersAndSetters.ts, 51, 15))
+>t : Symbol(t, Decl(objectLiteralGettersAndSetters.ts, 49, 22))
+        }
+    },
+    set n(x: (t: string) => void) { }
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 48, 21), Decl(objectLiteralGettersAndSetters.ts, 53, 6))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 54, 10))
+>t : Symbol(t, Decl(objectLiteralGettersAndSetters.ts, 54, 14))
+
+};
+
+// Type of unannotated set accessor parameter is the return type annotation of the get accessor
+var getParamType1 = {
+>getParamType1 : Symbol(getParamType1, Decl(objectLiteralGettersAndSetters.ts, 58, 3))
+
+    set n(x) {
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 58, 21), Decl(objectLiteralGettersAndSetters.ts, 62, 6))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 59, 10))
+
+        var y = x;
+>y : Symbol(y, Decl(objectLiteralGettersAndSetters.ts, 60, 11), Decl(objectLiteralGettersAndSetters.ts, 61, 11))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 59, 10))
+
+        var y: string;
+>y : Symbol(y, Decl(objectLiteralGettersAndSetters.ts, 60, 11), Decl(objectLiteralGettersAndSetters.ts, 61, 11))
+
+    },
+    get n() { return ''; }
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 58, 21), Decl(objectLiteralGettersAndSetters.ts, 62, 6))
+
+};
+var getParamType2 = {
+>getParamType2 : Symbol(getParamType2, Decl(objectLiteralGettersAndSetters.ts, 65, 3))
+
+    get n() { return ''; },
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 65, 21), Decl(objectLiteralGettersAndSetters.ts, 66, 27))
+
+    set n(x) {
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 65, 21), Decl(objectLiteralGettersAndSetters.ts, 66, 27))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 67, 10))
+
+        var y = x;
+>y : Symbol(y, Decl(objectLiteralGettersAndSetters.ts, 68, 11), Decl(objectLiteralGettersAndSetters.ts, 69, 11))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 67, 10))
+
+        var y: string;
+>y : Symbol(y, Decl(objectLiteralGettersAndSetters.ts, 68, 11), Decl(objectLiteralGettersAndSetters.ts, 69, 11))
+    }
+};
+
+// Type of unannotated accessors is the inferred return type of the get accessor
+var getParamType3 = {
+>getParamType3 : Symbol(getParamType3, Decl(objectLiteralGettersAndSetters.ts, 74, 3))
+
+    get n() { return ''; },
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 74, 21), Decl(objectLiteralGettersAndSetters.ts, 75, 27))
+
+    set n(x) {
+>n : Symbol(n, Decl(objectLiteralGettersAndSetters.ts, 74, 21), Decl(objectLiteralGettersAndSetters.ts, 75, 27))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 76, 10))
+
+        var y = x;
+>y : Symbol(y, Decl(objectLiteralGettersAndSetters.ts, 77, 11), Decl(objectLiteralGettersAndSetters.ts, 78, 11))
+>x : Symbol(x, Decl(objectLiteralGettersAndSetters.ts, 76, 10))
+
+        var y: string;
+>y : Symbol(y, Decl(objectLiteralGettersAndSetters.ts, 77, 11), Decl(objectLiteralGettersAndSetters.ts, 78, 11))
+    }
+};
+
+
diff --git a/tests/baselines/reference/objectLiteralGettersAndSetters.types b/tests/baselines/reference/objectLiteralGettersAndSetters.types
new file mode 100644
index 0000000000000..5302bcdbbf561
--- /dev/null
+++ b/tests/baselines/reference/objectLiteralGettersAndSetters.types
@@ -0,0 +1,295 @@
+=== tests/cases/conformance/expressions/objectLiterals/objectLiteralGettersAndSetters.ts ===
+// Get and set accessor with the same name
+var sameName1a = { get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } };
+>sameName1a : { 'a': string; }
+>{ get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } } : { 'a': string; }
+>'' : ""
+>a : string
+>n : string
+>p : string
+>n : string
+>p : string
+
+var sameName2a = { get 0.0() { return ''; }, set 0(n) { var p = n; var p: string; } };
+>sameName2a : { 0.0: string; }
+>{ get 0.0() { return ''; }, set 0(n) { var p = n; var p: string; } } : { 0.0: string; }
+>'' : ""
+>n : string
+>p : string
+>n : string
+>p : string
+
+var sameName3a = { get 0x20() { return ''; }, set 3.2e1(n) { var p = n; var p: string; } };
+>sameName3a : { 0x20: string; }
+>{ get 0x20() { return ''; }, set 3.2e1(n) { var p = n; var p: string; } } : { 0x20: string; }
+>'' : ""
+>n : string
+>p : string
+>n : string
+>p : string
+
+var sameName4a = { get ''() { return ''; }, set ""(n) { var p = n; var p: string; } };
+>sameName4a : { '': string; }
+>{ get ''() { return ''; }, set ""(n) { var p = n; var p: string; } } : { '': string; }
+>'' : ""
+>n : string
+>p : string
+>n : string
+>p : string
+
+var sameName5a = { get '\t'() { return ''; }, set '\t'(n) { var p = n; var p: string; } };
+>sameName5a : { '\t': string; }
+>{ get '\t'() { return ''; }, set '\t'(n) { var p = n; var p: string; } } : { '\t': string; }
+>'' : ""
+>n : string
+>p : string
+>n : string
+>p : string
+
+var sameName6a = { get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } };
+>sameName6a : { 'a': string; }
+>{ get 'a'() { return ''; }, set a(n) { var p = n; var p: string; } } : { 'a': string; }
+>'' : ""
+>a : string
+>n : string
+>p : string
+>n : string
+>p : string
+
+// PropertyName CallSignature{FunctionBody} is equivalent to PropertyName:function CallSignature{FunctionBody}
+var callSig1 = { num(n: number) { return '' } };
+>callSig1 : { num(n: number): string; }
+>{ num(n: number) { return '' } } : { num(n: number): string; }
+>num : (n: number) => string
+>n : number
+>'' : ""
+
+var callSig1: { num: (n: number) => string; };
+>callSig1 : { num(n: number): string; }
+>num : (n: number) => string
+>n : number
+
+var callSig2 = { num: function (n: number) { return '' } };
+>callSig2 : { num: (n: number) => string; }
+>{ num: function (n: number) { return '' } } : { num: (n: number) => string; }
+>num : (n: number) => string
+>function (n: number) { return '' } : (n: number) => string
+>n : number
+>'' : ""
+
+var callSig2: { num: (n: number) => string; };
+>callSig2 : { num: (n: number) => string; }
+>num : (n: number) => string
+>n : number
+
+var callSig3 = { num: (n: number) => '' };
+>callSig3 : { num: (n: number) => string; }
+>{ num: (n: number) => '' } : { num: (n: number) => string; }
+>num : (n: number) => string
+>(n: number) => '' : (n: number) => string
+>n : number
+>'' : ""
+
+var callSig3: { num: (n: number) => string; };
+>callSig3 : { num: (n: number) => string; }
+>num : (n: number) => string
+>n : number
+
+// Get accessor only, type of the property is the annotated return type of the get accessor
+var getter1 = { get x(): string { return undefined; } };
+>getter1 : { readonly x: string; }
+>{ get x(): string { return undefined; } } : { readonly x: string; }
+>x : string
+>undefined : undefined
+
+var getter1: { readonly x: string; }
+>getter1 : { readonly x: string; }
+>x : string
+
+// Get accessor only, type of the property is the inferred return type of the get accessor
+var getter2 = { get x() { return ''; } };
+>getter2 : { readonly x: string; }
+>{ get x() { return ''; } } : { readonly x: string; }
+>x : string
+>'' : ""
+
+var getter2: { readonly x: string; }
+>getter2 : { readonly x: string; }
+>x : string
+
+// Set accessor only, type of the property is the param type of the set accessor
+var setter1 = { set x(n: number) { } };
+>setter1 : { x: number; }
+>{ set x(n: number) { } } : { x: number; }
+>x : number
+>n : number
+
+var setter1: { x: number };
+>setter1 : { x: number; }
+>x : number
+
+// Set accessor only, type of the property is Any for an unannotated set accessor
+var setter2 = { set x(n) { } };
+>setter2 : { x: any; }
+>{ set x(n) { } } : { x: any; }
+>x : any
+>n : any
+
+var setter2: { x: any };
+>setter2 : { x: any; }
+>x : any
+
+var anyVar: any;
+>anyVar : any
+
+// Get and set accessor with matching type annotations
+var sameType1 = { get x(): string { return undefined; }, set x(n: string) { } };
+>sameType1 : { x: string; }
+>{ get x(): string { return undefined; }, set x(n: string) { } } : { x: string; }
+>x : string
+>undefined : undefined
+>x : string
+>n : string
+
+var sameType2 = { get x(): Array<number> { return undefined; }, set x(n: number[]) { } };
+>sameType2 : { x: number[]; }
+>{ get x(): Array<number> { return undefined; }, set x(n: number[]) { } } : { x: number[]; }
+>x : number[]
+>Array : T[]
+>undefined : undefined
+>x : number[]
+>n : number[]
+
+var sameType3 = { get x(): any { return undefined; }, set x(n: typeof anyVar) { } };
+>sameType3 : { x: any; }
+>{ get x(): any { return undefined; }, set x(n: typeof anyVar) { } } : { x: any; }
+>x : any
+>undefined : undefined
+>x : any
+>n : any
+>anyVar : any
+
+var sameType4 = { get x(): Date { return undefined; }, set x(n: Date) { } };
+>sameType4 : { x: Date; }
+>{ get x(): Date { return undefined; }, set x(n: Date) { } } : { x: Date; }
+>x : Date
+>Date : Date
+>undefined : undefined
+>x : Date
+>n : Date
+>Date : Date
+
+// Type of unannotated get accessor return type is the type annotation of the set accessor param
+var setParamType1 = {
+>setParamType1 : { n: (t: string) => void; }
+>{    set n(x: (t: string) => void) { },    get n() { return (t) => {            var p: string;            var p = t;        }    }} : { n: (t: string) => void; }
+
+    set n(x: (t: string) => void) { },
+>n : (t: string) => void
+>x : (t: string) => void
+>t : string
+
+    get n() { return (t) => {
+>n : (t: string) => void
+>(t) => {            var p: string;            var p = t;        } : (t: string) => void
+>t : string
+
+            var p: string;
+>p : string
+
+            var p = t;
+>p : string
+>t : string
+        }
+    }
+};
+var setParamType2 = {
+>setParamType2 : { n: (t: string) => void; }
+>{    get n() { return (t) => {            var p: string;            var p = t;        }    },    set n(x: (t: string) => void) { }} : { n: (t: string) => void; }
+
+    get n() { return (t) => {
+>n : (t: string) => void
+>(t) => {            var p: string;            var p = t;        } : (t: string) => void
+>t : string
+
+            var p: string;
+>p : string
+
+            var p = t;
+>p : string
+>t : string
+        }
+    },
+    set n(x: (t: string) => void) { }
+>n : (t: string) => void
+>x : (t: string) => void
+>t : string
+
+};
+
+// Type of unannotated set accessor parameter is the return type annotation of the get accessor
+var getParamType1 = {
+>getParamType1 : { n: string; }
+>{    set n(x) {        var y = x;        var y: string;    },    get n() { return ''; }} : { n: string; }
+
+    set n(x) {
+>n : string
+>x : string
+
+        var y = x;
+>y : string
+>x : string
+
+        var y: string;
+>y : string
+
+    },
+    get n() { return ''; }
+>n : string
+>'' : ""
+
+};
+var getParamType2 = {
+>getParamType2 : { n: string; }
+>{    get n() { return ''; },    set n(x) {        var y = x;        var y: string;    }} : { n: string; }
+
+    get n() { return ''; },
+>n : string
+>'' : ""
+
+    set n(x) {
+>n : string
+>x : string
+
+        var y = x;
+>y : string
+>x : string
+
+        var y: string;
+>y : string
+    }
+};
+
+// Type of unannotated accessors is the inferred return type of the get accessor
+var getParamType3 = {
+>getParamType3 : { n: string; }
+>{    get n() { return ''; },    set n(x) {        var y = x;        var y: string;    }} : { n: string; }
+
+    get n() { return ''; },
+>n : string
+>'' : ""
+
+    set n(x) {
+>n : string
+>x : string
+
+        var y = x;
+>y : string
+>x : string
+
+        var y: string;
+>y : string
+    }
+};
+
+
diff --git a/tests/baselines/reference/objectLiteralMemberWithModifiers2.errors.txt b/tests/baselines/reference/objectLiteralMemberWithModifiers2.errors.txt
index 0d1822339b643..1a932b0dddf48 100644
--- a/tests/baselines/reference/objectLiteralMemberWithModifiers2.errors.txt
+++ b/tests/baselines/reference/objectLiteralMemberWithModifiers2.errors.txt
@@ -1,13 +1,10 @@
 tests/cases/compiler/objectLiteralMemberWithModifiers2.ts(1,11): error TS1042: 'public' modifier cannot be used here.
-tests/cases/compiler/objectLiteralMemberWithModifiers2.ts(1,22): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/objectLiteralMemberWithModifiers2.ts(1,22): error TS2378: A 'get' accessor must return a value.
 
 
-==== tests/cases/compiler/objectLiteralMemberWithModifiers2.ts (3 errors) ====
+==== tests/cases/compiler/objectLiteralMemberWithModifiers2.ts (2 errors) ====
     var v = { public get foo() { } }
               ~~~~~~
 !!! error TS1042: 'public' modifier cannot be used here.
                          ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                         ~~~
 !!! error TS2378: A 'get' accessor must return a value.
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.js b/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.js
index 7b9c9f5d32850..b72f0351b9c82 100644
--- a/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.js
+++ b/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.js
@@ -27,15 +27,15 @@ var y = {
     42: ,
     get e() { },
     set f() { },
-    "this": ,
-    "super": ,
-    "var": ,
-    "class": ,
-    "typeof": 
+    this: ,
+    super: ,
+    var: ,
+    class: ,
+    typeof: 
 };
 var x = {
     a: .b,
     a: ["ss"],
     a: [1]
 };
-var v = { "class":  }; // error
+var v = { class:  }; // error
diff --git a/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.errors.txt b/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.errors.txt
deleted file mode 100644
index 1b1426e28b20e..0000000000000
--- a/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.errors.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-tests/cases/compiler/objectLiteralWithGetAccessorInsideFunction.ts(3,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/objectLiteralWithGetAccessorInsideFunction.ts (1 errors) ====
-    function bar() {
-        var x = {
-            get _extraOccluded() {
-                ~~~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                var occluded = 0;
-                return occluded;
-            },
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.symbols b/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.symbols
new file mode 100644
index 0000000000000..77925d5c8053f
--- /dev/null
+++ b/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.symbols
@@ -0,0 +1,19 @@
+=== tests/cases/compiler/objectLiteralWithGetAccessorInsideFunction.ts ===
+function bar() {
+>bar : Symbol(bar, Decl(objectLiteralWithGetAccessorInsideFunction.ts, 0, 0))
+
+    var x = {
+>x : Symbol(x, Decl(objectLiteralWithGetAccessorInsideFunction.ts, 1, 7))
+
+        get _extraOccluded() {
+>_extraOccluded : Symbol(_extraOccluded, Decl(objectLiteralWithGetAccessorInsideFunction.ts, 1, 13))
+
+            var occluded = 0;
+>occluded : Symbol(occluded, Decl(objectLiteralWithGetAccessorInsideFunction.ts, 3, 15))
+
+            return occluded;
+>occluded : Symbol(occluded, Decl(objectLiteralWithGetAccessorInsideFunction.ts, 3, 15))
+
+        },
+    }
+}
diff --git a/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.types b/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.types
new file mode 100644
index 0000000000000..fd229afbbad52
--- /dev/null
+++ b/tests/baselines/reference/objectLiteralWithGetAccessorInsideFunction.types
@@ -0,0 +1,21 @@
+=== tests/cases/compiler/objectLiteralWithGetAccessorInsideFunction.ts ===
+function bar() {
+>bar : () => void
+
+    var x = {
+>x : { readonly _extraOccluded: number; }
+>{        get _extraOccluded() {            var occluded = 0;            return occluded;        },    } : { readonly _extraOccluded: number; }
+
+        get _extraOccluded() {
+>_extraOccluded : number
+
+            var occluded = 0;
+>occluded : number
+>0 : 0
+
+            return occluded;
+>occluded : number
+
+        },
+    }
+}
diff --git a/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.errors.txt b/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.errors.txt
new file mode 100644
index 0000000000000..d357fc6e1cb5b
--- /dev/null
+++ b/tests/baselines/reference/objectTypeWithStringNamedNumericProperty.errors.txt
@@ -0,0 +1,153 @@
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(33,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(34,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(64,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(65,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(94,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(95,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(124,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts(125,13): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+
+
+==== tests/cases/conformance/types/members/objectTypeWithStringNamedNumericProperty.ts (8 errors) ====
+    // string named numeric properties are legal and distinct when indexed by string values
+    // indexed numerically the value is converted to a number
+    // no errors expected below
+    
+    class C {
+        "0.1": void;
+        ".1": Object;
+        "1": number;
+        "1.": string;
+        "1..": boolean;
+        "1.0": Date;
+        "-1.0": RegExp;
+        "-1": Date;
+    }
+    
+    var c: C;
+    var r1 = c['0.1'];
+    var r2 = c['.1'];
+    var r3 = c['1'];
+    var r3 = c[1];
+    var r4 = c['1.'];
+    var r3 = c[1.]; // same as indexing by 1 when done numerically
+    var r5 = c['1..'];
+    var r6 = c['1.0'];
+    var r3 = c[1.0]; // same as indexing by 1 when done numerically
+    // BUG 823822
+    var r7 = i[-1];
+    var r7 = i[-1.0];
+    var r8 = i["-1.0"];
+    var r9 = i["-1"];
+    var r10 = i[0x1]
+    var r11 = i[-0x1]
+    var r12 = i[01]
+                ~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+    var r13 = i[-01]
+                ~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+    
+    interface I {
+        "0.1": void;
+        ".1": Object;
+        "1": number;
+        "1.": string;
+        "1..": boolean;
+        "1.0": Date;
+        "-1.0": RegExp;
+        "-1": Date;
+    }
+    
+    var i: I;
+    var r1 = i['0.1'];
+    var r2 = i['.1'];
+    var r3 = i['1'];
+    var r3 = c[1];
+    var r4 = i['1.'];
+    var r3 = c[1.]; // same as indexing by 1 when done numerically
+    var r5 = i['1..'];
+    var r6 = i['1.0'];
+    var r3 = c[1.0]; // same as indexing by 1 when done numerically
+    // BUG 823822
+    var r7 = i[-1]; 
+    var r7 = i[-1.0]; 
+    var r8 = i["-1.0"];
+    var r9 = i["-1"];
+    var r10 = i[0x1]
+    var r11 = i[-0x1]
+    var r12 = i[01]
+                ~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+    var r13 = i[-01]
+                ~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+    
+    var a: {
+        "0.1": void;
+        ".1": Object;
+        "1": number;
+        "1.": string;
+        "1..": boolean;
+        "1.0": Date;
+        "-1.0": RegExp;
+        "-1": Date;
+    }
+    
+    var r1 = a['0.1'];
+    var r2 = a['.1'];
+    var r3 = a['1'];
+    var r3 = c[1];
+    var r4 = a['1.'];
+    var r3 = c[1.]; // same as indexing by 1 when done numerically
+    var r5 = a['1..'];
+    var r6 = a['1.0'];
+    var r3 = c[1.0]; // same as indexing by 1 when done numerically
+    // BUG 823822
+    var r7 = i[-1];
+    var r7 = i[-1.0];
+    var r8 = i["-1.0"];
+    var r9 = i["-1"];
+    var r10 = i[0x1]
+    var r11 = i[-0x1]
+    var r12 = i[01]
+                ~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+    var r13 = i[-01]
+                ~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+    
+    var b = {
+        "0.1": <void>null,
+        ".1": new Object(),
+        "1": 1,
+        "1.": "",
+        "1..": true,
+        "1.0": new Date(),
+        "-1.0": /123/,
+        "-1": Date
+    };
+    
+    var r1 = b['0.1'];
+    var r2 = b['.1'];
+    var r3 = b['1'];
+    var r3 = c[1];
+    var r4 = b['1.'];
+    var r3 = c[1.]; // same as indexing by 1 when done numerically
+    var r5 = b['1..'];
+    var r6 = b['1.0'];
+    var r3 = c[1.0]; // same as indexing by 1 when done numerically
+    // BUG 823822
+    var r7 = i[-1];
+    var r7 = i[-1.0];
+    var r8 = i["-1.0"];
+    var r9 = i["-1"];
+    var r10 = i[0x1]
+    var r11 = i[-0x1]
+    var r12 = i[01]
+                ~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+    var r13 = i[-01]
+                ~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '-0o1'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js b/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js
index 0a422dbda6f0f..315e079d429bf 100644
--- a/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithConstructSignatures2.js
@@ -91,7 +91,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x) { return ''; } }; // not a construct signature, function called new
+var b = { new: function (x) { return ''; } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js b/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js
index 5fa148b541d45..a61bedfd52f23 100644
--- a/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js
+++ b/tests/baselines/reference/objectTypesIdentityWithConstructSignaturesDifferingParamCounts.js
@@ -91,7 +91,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x) { return ''; } }; // not a construct signature, function called new
+var b = { new: function (x) { return ''; } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js
index 6a66e8bbda3b9..c15c53b9bf80d 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints.js
@@ -92,7 +92,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x) { return ''; } }; // not a construct signature, function called new
+var b = { new: function (x) { return ''; } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js
index e19837a9f7f2c..f8aff596dc9c5 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints2.js
@@ -109,7 +109,7 @@ var D = (function () {
     return D;
 }());
 var a;
-var b = { "new": function (x, y) { return ''; } }; // not a construct signature, function called new
+var b = { new: function (x, y) { return ''; } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js
index 735c5bdc2d69c..141aa86823b27 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByConstraints3.js
@@ -128,7 +128,7 @@ var D = (function () {
     return D;
 }());
 var a;
-var b = { "new": function (x, y) { return ''; } }; // not a construct signature, function called new
+var b = { new: function (x, y) { return ''; } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js
index 6eab84a49ddb4..b651d368f334b 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType.js
@@ -99,7 +99,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x) { return null; } }; // not a construct signature, function called new
+var b = { new: function (x) { return null; } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js
index d927a8e082a22..ff7095c4ea1a1 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingByReturnType2.js
@@ -95,7 +95,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x) { return null; } }; // not a construct signature, function called new
+var b = { new: function (x) { return null; } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterCounts.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterCounts.js
index 512bebb3b0e8d..314eb700c4b19 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterCounts.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterCounts.js
@@ -87,7 +87,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x) { return x; } };
+var b = { new: function (x) { return x; } };
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterNames.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterNames.js
index 80cfcd23ec9c3..182cf8263b779 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterNames.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesDifferingTypeParameterNames.js
@@ -87,7 +87,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x) { return new C(x); } };
+var b = { new: function (x) { return new C(x); } };
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js
index 87cb0b33531e5..5c5dd26c33171 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams.js
@@ -91,7 +91,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x, y) { return new C(x, y); } }; // not a construct signature, function called new
+var b = { new: function (x, y) { return new C(x, y); } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js
index 6b0e91f817ff9..14b2ec3c0ca0a 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams2.js
@@ -91,7 +91,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x, y) { return new C(x, y); } }; // not a construct signature, function called new
+var b = { new: function (x, y) { return new C(x, y); } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js
index 55f2a0217e934..ffc238cacae09 100644
--- a/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js
+++ b/tests/baselines/reference/objectTypesIdentityWithGenericConstructSignaturesOptionalParams3.js
@@ -91,7 +91,7 @@ var C = (function () {
     return C;
 }());
 var a;
-var b = { "new": function (x, y) { return new C(x, y); } }; // not a construct signature, function called new
+var b = { new: function (x, y) { return new C(x, y); } }; // not a construct signature, function called new
 function foo1b(x) { }
 function foo1c(x) { }
 function foo2(x) { }
diff --git a/tests/baselines/reference/octalLiteralInStrictModeES3.errors.txt b/tests/baselines/reference/octalLiteralInStrictModeES3.errors.txt
index a884dbc500565..ce569787913eb 100644
--- a/tests/baselines/reference/octalLiteralInStrictModeES3.errors.txt
+++ b/tests/baselines/reference/octalLiteralInStrictModeES3.errors.txt
@@ -1,8 +1,11 @@
+tests/cases/conformance/parser/ecmascript5/StrictMode/octalLiteralInStrictModeES3.ts(2,1): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'.
 tests/cases/conformance/parser/ecmascript5/StrictMode/octalLiteralInStrictModeES3.ts(2,1): error TS1121: Octal literals are not allowed in strict mode.
 
 
-==== tests/cases/conformance/parser/ecmascript5/StrictMode/octalLiteralInStrictModeES3.ts (1 errors) ====
+==== tests/cases/conformance/parser/ecmascript5/StrictMode/octalLiteralInStrictModeES3.ts (2 errors) ====
     "use strict";
     03;
     ~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o3'.
+    ~~
 !!! error TS1121: Octal literals are not allowed in strict mode.
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalSetterParam.errors.txt b/tests/baselines/reference/optionalSetterParam.errors.txt
index 732351671ce25..1e87132ffa798 100644
--- a/tests/baselines/reference/optionalSetterParam.errors.txt
+++ b/tests/baselines/reference/optionalSetterParam.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/compiler/optionalSetterParam.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/compiler/optionalSetterParam.ts(3,25): error TS1051: A 'set' accessor cannot have an optional parameter.
 
 
 ==== tests/cases/compiler/optionalSetterParam.ts (1 errors) ====
     class foo {
     
         public set bar(param?:any) { }
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+                            ~
+!!! error TS1051: A 'set' accessor cannot have an optional parameter.
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/overloadModifiersMustAgree.js b/tests/baselines/reference/overloadModifiersMustAgree.js
index 783bf854a8424..44b139b30cab2 100644
--- a/tests/baselines/reference/overloadModifiersMustAgree.js
+++ b/tests/baselines/reference/overloadModifiersMustAgree.js
@@ -17,7 +17,7 @@ interface I {
 
 //// [overloadModifiersMustAgree.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var baz = (function () {
     function baz() {
     }
diff --git a/tests/baselines/reference/packageJsonMain.js b/tests/baselines/reference/packageJsonMain.js
index 8a545c490163a..e40316801bf8b 100644
--- a/tests/baselines/reference/packageJsonMain.js
+++ b/tests/baselines/reference/packageJsonMain.js
@@ -27,7 +27,7 @@ foo + bar + baz;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("foo");
 var bar = require("bar");
 var baz = require("baz");
diff --git a/tests/baselines/reference/packageJsonMain_isNonRecursive.js b/tests/baselines/reference/packageJsonMain_isNonRecursive.js
index 61d98c81f112e..db02ba5bd214b 100644
--- a/tests/baselines/reference/packageJsonMain_isNonRecursive.js
+++ b/tests/baselines/reference/packageJsonMain_isNonRecursive.js
@@ -15,4 +15,4 @@ import foo = require("foo");
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/parser0_004152.js b/tests/baselines/reference/parser0_004152.js
index b4443e0413632..6e7700ba5b5c4 100644
--- a/tests/baselines/reference/parser0_004152.js
+++ b/tests/baselines/reference/parser0_004152.js
@@ -6,7 +6,7 @@ export class Game {
 
 //// [parser0_004152.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Game = (function () {
     function Game() {
         this.position = new DisplayPosition([]);
diff --git a/tests/baselines/reference/parser509546.js b/tests/baselines/reference/parser509546.js
index e99d1d1764d67..142fa5914222b 100644
--- a/tests/baselines/reference/parser509546.js
+++ b/tests/baselines/reference/parser509546.js
@@ -6,7 +6,7 @@ export class Logger {
 
 //// [parser509546.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Logger = (function () {
     function Logger() {
     }
diff --git a/tests/baselines/reference/parser509546_1.js b/tests/baselines/reference/parser509546_1.js
index 3fc82755fbf91..23c7e4f076869 100644
--- a/tests/baselines/reference/parser509546_1.js
+++ b/tests/baselines/reference/parser509546_1.js
@@ -6,7 +6,7 @@ export class Logger {
 
 //// [parser509546_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Logger = (function () {
     function Logger() {
     }
diff --git a/tests/baselines/reference/parser509546_2.js b/tests/baselines/reference/parser509546_2.js
index c16f041b2db71..83ef574fe5d25 100644
--- a/tests/baselines/reference/parser509546_2.js
+++ b/tests/baselines/reference/parser509546_2.js
@@ -8,7 +8,7 @@ export class Logger {
 
 //// [parser509546_2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Logger = (function () {
     function Logger() {
     }
diff --git a/tests/baselines/reference/parser618973.js b/tests/baselines/reference/parser618973.js
index bfef06b061f70..e752fdf9ffb50 100644
--- a/tests/baselines/reference/parser618973.js
+++ b/tests/baselines/reference/parser618973.js
@@ -6,7 +6,7 @@ export export class Foo {
 
 //// [parser618973.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = (function () {
     function Foo() {
     }
diff --git a/tests/baselines/reference/parserArgumentList1.js b/tests/baselines/reference/parserArgumentList1.js
index 36c8f61923549..b26dc4fd87c66 100644
--- a/tests/baselines/reference/parserArgumentList1.js
+++ b/tests/baselines/reference/parserArgumentList1.js
@@ -7,7 +7,7 @@ export function removeClass (node:HTMLElement, className:string) {
 
 //// [parserArgumentList1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function removeClass(node, className) {
     node.className = node.className.replace(_classNameRegexp(className), function (everything, leftDelimiter, name, rightDelimiter) {
         return leftDelimiter.length + rightDelimiter.length === 2 ? ' ' : '';
diff --git a/tests/baselines/reference/parserAstSpans1.errors.txt b/tests/baselines/reference/parserAstSpans1.errors.txt
index 648929e974e3e..7eb18222f7fd0 100644
--- a/tests/baselines/reference/parserAstSpans1.errors.txt
+++ b/tests/baselines/reference/parserAstSpans1.errors.txt
@@ -1,14 +1,8 @@
-tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(79,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(85,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(94,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(100,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(111,25): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
-tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(119,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(125,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(217,24): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 
 
-==== tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts (8 errors) ====
+==== tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts (2 errors) ====
     /** i1 is interface with properties*/
     interface i1 {
         /** i1_p1*/
@@ -88,16 +82,12 @@ tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(217,24): error TS2
         }
         /** c2 c2_prop*/
         public get c2_prop() {
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         }
         public c2_nc_p1: number;
         public c2_nc_f1() {
         }
         public get c2_nc_prop() {
-                   ~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         }
         /** c2 p1*/
@@ -107,16 +97,12 @@ tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(217,24): error TS2
         }
         /** c2 prop*/
         public get prop() {
-                   ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         }
         public nc_p1: number;
         public nc_f1() {
         }
         public get nc_prop() {
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         }
         /** c2 constructor*/
@@ -138,16 +124,12 @@ tests/cases/conformance/parser/ecmascript5/parserAstSpans1.ts(217,24): error TS2
         }
         /** c3 prop*/
         public get prop() {
-                   ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         }
         public nc_p1: number;
         public nc_f1() {
         }
         public get nc_prop() {
-                   ~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 10;
         }
     }
diff --git a/tests/baselines/reference/parserClass1.js b/tests/baselines/reference/parserClass1.js
index 7fcbf29f242be..71aaca5dd4b61 100644
--- a/tests/baselines/reference/parserClass1.js
+++ b/tests/baselines/reference/parserClass1.js
@@ -11,7 +11,7 @@
 
 //// [parserClass1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var NullLogger = (function () {
     function NullLogger() {
     }
diff --git a/tests/baselines/reference/parserClass2.js b/tests/baselines/reference/parserClass2.js
index 80c1fd8ff6ae8..e41312cca6929 100644
--- a/tests/baselines/reference/parserClass2.js
+++ b/tests/baselines/reference/parserClass2.js
@@ -7,7 +7,7 @@
 
 //// [parserClass2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var LoggerAdapter = (function () {
     function LoggerAdapter(logger) {
         this.logger = logger;
diff --git a/tests/baselines/reference/parserES3Accessors1.errors.txt b/tests/baselines/reference/parserES3Accessors1.errors.txt
index 9c6dbf0e76f63..53fa24a9e33b2 100644
--- a/tests/baselines/reference/parserES3Accessors1.errors.txt
+++ b/tests/baselines/reference/parserES3Accessors1.errors.txt
@@ -1,12 +1,9 @@
-tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors1.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors1.ts(2,9): error TS2378: A 'get' accessor must return a value.
 
 
-==== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors1.ts (2 errors) ====
+==== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors1.ts (1 errors) ====
     class C {
         get Foo() { }
             ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~~
 !!! error TS2378: A 'get' accessor must return a value.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/parserES3Accessors2.errors.txt b/tests/baselines/reference/parserES3Accessors2.errors.txt
deleted file mode 100644
index 006e31145a6c9..0000000000000
--- a/tests/baselines/reference/parserES3Accessors2.errors.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors2.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors2.ts (1 errors) ====
-    class C {
-        set Foo(a) { }
-            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/parserES3Accessors2.symbols b/tests/baselines/reference/parserES3Accessors2.symbols
new file mode 100644
index 0000000000000..ba0a8aac2e5d6
--- /dev/null
+++ b/tests/baselines/reference/parserES3Accessors2.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors2.ts ===
+class C {
+>C : Symbol(C, Decl(parserES3Accessors2.ts, 0, 0))
+
+    set Foo(a) { }
+>Foo : Symbol(C.Foo, Decl(parserES3Accessors2.ts, 0, 9))
+>a : Symbol(a, Decl(parserES3Accessors2.ts, 1, 12))
+}
diff --git a/tests/baselines/reference/parserES3Accessors2.types b/tests/baselines/reference/parserES3Accessors2.types
new file mode 100644
index 0000000000000..d945a4695376f
--- /dev/null
+++ b/tests/baselines/reference/parserES3Accessors2.types
@@ -0,0 +1,8 @@
+=== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors2.ts ===
+class C {
+>C : C
+
+    set Foo(a) { }
+>Foo : any
+>a : any
+}
diff --git a/tests/baselines/reference/parserES3Accessors3.errors.txt b/tests/baselines/reference/parserES3Accessors3.errors.txt
index 70ab3f2072e08..332ef8c801e8c 100644
--- a/tests/baselines/reference/parserES3Accessors3.errors.txt
+++ b/tests/baselines/reference/parserES3Accessors3.errors.txt
@@ -1,10 +1,7 @@
-tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors3.ts(1,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors3.ts(1,15): error TS2378: A 'get' accessor must return a value.
 
 
-==== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors3.ts (2 errors) ====
+==== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors3.ts (1 errors) ====
     var v = { get Foo() { } };
                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                  ~~~
 !!! error TS2378: A 'get' accessor must return a value.
\ No newline at end of file
diff --git a/tests/baselines/reference/parserES3Accessors4.errors.txt b/tests/baselines/reference/parserES3Accessors4.errors.txt
deleted file mode 100644
index 8ac3df5ddb1da..0000000000000
--- a/tests/baselines/reference/parserES3Accessors4.errors.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors4.ts(1,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors4.ts (1 errors) ====
-    var v = { set Foo(a) { } };
-                  ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/parserES3Accessors4.symbols b/tests/baselines/reference/parserES3Accessors4.symbols
new file mode 100644
index 0000000000000..671207448dfdd
--- /dev/null
+++ b/tests/baselines/reference/parserES3Accessors4.symbols
@@ -0,0 +1,6 @@
+=== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors4.ts ===
+var v = { set Foo(a) { } };
+>v : Symbol(v, Decl(parserES3Accessors4.ts, 0, 3))
+>Foo : Symbol(Foo, Decl(parserES3Accessors4.ts, 0, 9))
+>a : Symbol(a, Decl(parserES3Accessors4.ts, 0, 18))
+
diff --git a/tests/baselines/reference/parserES3Accessors4.types b/tests/baselines/reference/parserES3Accessors4.types
new file mode 100644
index 0000000000000..26e80a150b31a
--- /dev/null
+++ b/tests/baselines/reference/parserES3Accessors4.types
@@ -0,0 +1,7 @@
+=== tests/cases/conformance/parser/ecmascript3/Accessors/parserES3Accessors4.ts ===
+var v = { set Foo(a) { } };
+>v : { Foo: any; }
+>{ set Foo(a) { } } : { Foo: any; }
+>Foo : any
+>a : any
+
diff --git a/tests/baselines/reference/parserEnum1.js b/tests/baselines/reference/parserEnum1.js
index 10f24cc86017d..838f92641d7ac 100644
--- a/tests/baselines/reference/parserEnum1.js
+++ b/tests/baselines/reference/parserEnum1.js
@@ -8,7 +8,7 @@
 
 //// [parserEnum1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var SignatureFlags;
 (function (SignatureFlags) {
     SignatureFlags[SignatureFlags["None"] = 0] = "None";
diff --git a/tests/baselines/reference/parserEnum2.js b/tests/baselines/reference/parserEnum2.js
index b1f28f6c5025a..0b673b1825d42 100644
--- a/tests/baselines/reference/parserEnum2.js
+++ b/tests/baselines/reference/parserEnum2.js
@@ -8,7 +8,7 @@
 
 //// [parserEnum2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var SignatureFlags;
 (function (SignatureFlags) {
     SignatureFlags[SignatureFlags["None"] = 0] = "None";
diff --git a/tests/baselines/reference/parserEnum3.js b/tests/baselines/reference/parserEnum3.js
index 3e5595911285a..8e19fd727046f 100644
--- a/tests/baselines/reference/parserEnum3.js
+++ b/tests/baselines/reference/parserEnum3.js
@@ -4,7 +4,7 @@
 
 //// [parserEnum3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var SignatureFlags;
 (function (SignatureFlags) {
 })(SignatureFlags = exports.SignatureFlags || (exports.SignatureFlags = {}));
diff --git a/tests/baselines/reference/parserEnum4.js b/tests/baselines/reference/parserEnum4.js
index 90919ed8347ed..c80d1ffa73828 100644
--- a/tests/baselines/reference/parserEnum4.js
+++ b/tests/baselines/reference/parserEnum4.js
@@ -5,7 +5,7 @@
 
 //// [parserEnum4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var SignatureFlags;
 (function (SignatureFlags) {
 })(SignatureFlags = exports.SignatureFlags || (exports.SignatureFlags = {}));
diff --git a/tests/baselines/reference/parserErrantSemicolonInClass1.errors.txt b/tests/baselines/reference/parserErrantSemicolonInClass1.errors.txt
index aec80ad934d03..05d93c56f284f 100644
--- a/tests/baselines/reference/parserErrantSemicolonInClass1.errors.txt
+++ b/tests/baselines/reference/parserErrantSemicolonInClass1.errors.txt
@@ -1,10 +1,7 @@
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonInClass1.ts(12,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonInClass1.ts(15,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonInClass1.ts(18,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonInClass1.ts(24,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonInClass1.ts(15,16): error TS1049: A 'set' accessor must have exactly one parameter.
 
 
-==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonInClass1.ts (4 errors) ====
+==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonInClass1.ts (1 errors) ====
     class a {
         //constructor ();
         constructor (n: number);
@@ -17,26 +14,20 @@ tests/cases/conformance/parser/ecmascript5/ErrorRecovery/parserErrantSemicolonIn
     
         public pv;
         public get d() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 30;
         }
         public set d() {
                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
+!!! error TS1049: A 'set' accessor must have exactly one parameter.
         }
     
         public static get p2() {
-                          ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return { x: 30, y: 40 };
         }
     
         private static d2() {
         }
         private static get p3() {
-                           ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return "string";
         }
         private pv3;
diff --git a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral2.js b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral2.js
index c206a30237a5e..6a703759fff75 100644
--- a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral2.js
+++ b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral2.js
@@ -4,4 +4,4 @@ return;
 
 //// [parserErrorRecovery_ObjectLiteral2.js]
 var v = { a: ,
-    "return":  };
+    return:  };
diff --git a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral3.js b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral3.js
index 6cee2b4272519..eecf45fea4fa0 100644
--- a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral3.js
+++ b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral3.js
@@ -4,4 +4,4 @@ return;
 
 //// [parserErrorRecovery_ObjectLiteral3.js]
 var v = { a: ,
-    "return":  };
+    return:  };
diff --git a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral4.js b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral4.js
index 23d17c8047b5c..87a1a31437ef7 100644
--- a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral4.js
+++ b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral4.js
@@ -4,4 +4,4 @@ return;
 
 //// [parserErrorRecovery_ObjectLiteral4.js]
 var v = { a: 1,
-    "return":  };
+    return:  };
diff --git a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral5.js b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral5.js
index 7b83132bf0fb4..97e618946a0e2 100644
--- a/tests/baselines/reference/parserErrorRecovery_ObjectLiteral5.js
+++ b/tests/baselines/reference/parserErrorRecovery_ObjectLiteral5.js
@@ -4,4 +4,4 @@ return;
 
 //// [parserErrorRecovery_ObjectLiteral5.js]
 var v = { a: 1,
-    "return":  };
+    return:  };
diff --git a/tests/baselines/reference/parserExportAsFunctionIdentifier.js b/tests/baselines/reference/parserExportAsFunctionIdentifier.js
index 62429c76855c7..7ed76bb87d945 100644
--- a/tests/baselines/reference/parserExportAsFunctionIdentifier.js
+++ b/tests/baselines/reference/parserExportAsFunctionIdentifier.js
@@ -9,4 +9,4 @@ var x = f.export();
 
 //// [parserExportAsFunctionIdentifier.js]
 var f;
-var x = f["export"]();
+var x = f.export();
diff --git a/tests/baselines/reference/parserInterfaceDeclaration6.js b/tests/baselines/reference/parserInterfaceDeclaration6.js
index cbc734b534c53..ea5dfce7ad342 100644
--- a/tests/baselines/reference/parserInterfaceDeclaration6.js
+++ b/tests/baselines/reference/parserInterfaceDeclaration6.js
@@ -4,4 +4,4 @@ export export interface I {
 
 //// [parserInterfaceDeclaration6.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/parserInterfaceDeclaration7.js b/tests/baselines/reference/parserInterfaceDeclaration7.js
index 0c52f4639ce07..62c1e3cb80d45 100644
--- a/tests/baselines/reference/parserInterfaceDeclaration7.js
+++ b/tests/baselines/reference/parserInterfaceDeclaration7.js
@@ -4,4 +4,4 @@ export interface I {
 
 //// [parserInterfaceDeclaration7.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/parserKeywordsAsIdentifierName1.js b/tests/baselines/reference/parserKeywordsAsIdentifierName1.js
index a717abcc08ba0..c0c8c8443647f 100644
--- a/tests/baselines/reference/parserKeywordsAsIdentifierName1.js
+++ b/tests/baselines/reference/parserKeywordsAsIdentifierName1.js
@@ -8,7 +8,7 @@ var big = {
 
 //// [parserKeywordsAsIdentifierName1.js]
 var big = {
-    "break": 0,
-    "super": 0,
-    "const": 0
+    break: 0,
+    super: 0,
+    const: 0
 };
diff --git a/tests/baselines/reference/parserModifierOnStatementInBlock1.js b/tests/baselines/reference/parserModifierOnStatementInBlock1.js
index 43c1e4bf84588..8cc12f052d0c5 100644
--- a/tests/baselines/reference/parserModifierOnStatementInBlock1.js
+++ b/tests/baselines/reference/parserModifierOnStatementInBlock1.js
@@ -6,7 +6,7 @@ export function foo() {
 
 //// [parserModifierOnStatementInBlock1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() {
     export var x = this;
 }
diff --git a/tests/baselines/reference/parserModifierOnStatementInBlock3.js b/tests/baselines/reference/parserModifierOnStatementInBlock3.js
index 85c3d6da0a4c5..532a15bfd083f 100644
--- a/tests/baselines/reference/parserModifierOnStatementInBlock3.js
+++ b/tests/baselines/reference/parserModifierOnStatementInBlock3.js
@@ -7,7 +7,7 @@ export function foo() {
 
 //// [parserModifierOnStatementInBlock3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() {
     export function bar() {
     }
diff --git a/tests/baselines/reference/parserModule1.js b/tests/baselines/reference/parserModule1.js
index 484c74f721c62..7ee402db9d08e 100644
--- a/tests/baselines/reference/parserModule1.js
+++ b/tests/baselines/reference/parserModule1.js
@@ -33,7 +33,7 @@
 
 //// [parserModule1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var CompilerDiagnostics;
 (function (CompilerDiagnostics) {
     CompilerDiagnostics.debug = false;
diff --git a/tests/baselines/reference/parserReturnStatement4.errors.txt b/tests/baselines/reference/parserReturnStatement4.errors.txt
deleted file mode 100644
index 5ddb8e2e8de18..0000000000000
--- a/tests/baselines/reference/parserReturnStatement4.errors.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-tests/cases/conformance/parser/ecmascript5/Statements/ReturnStatements/parserReturnStatement4.ts(1,15): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/parser/ecmascript5/Statements/ReturnStatements/parserReturnStatement4.ts (1 errors) ====
-    var v = { get foo() { return } };
-                  ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/parserReturnStatement4.symbols b/tests/baselines/reference/parserReturnStatement4.symbols
new file mode 100644
index 0000000000000..0f533c8c4efa0
--- /dev/null
+++ b/tests/baselines/reference/parserReturnStatement4.symbols
@@ -0,0 +1,5 @@
+=== tests/cases/conformance/parser/ecmascript5/Statements/ReturnStatements/parserReturnStatement4.ts ===
+var v = { get foo() { return } };
+>v : Symbol(v, Decl(parserReturnStatement4.ts, 0, 3))
+>foo : Symbol(foo, Decl(parserReturnStatement4.ts, 0, 9))
+
diff --git a/tests/baselines/reference/parserReturnStatement4.types b/tests/baselines/reference/parserReturnStatement4.types
new file mode 100644
index 0000000000000..fdb0346deea39
--- /dev/null
+++ b/tests/baselines/reference/parserReturnStatement4.types
@@ -0,0 +1,6 @@
+=== tests/cases/conformance/parser/ecmascript5/Statements/ReturnStatements/parserReturnStatement4.ts ===
+var v = { get foo() { return } };
+>v : { readonly foo: void; }
+>{ get foo() { return } } : { readonly foo: void; }
+>foo : void
+
diff --git a/tests/baselines/reference/parserShorthandPropertyAssignment2.js b/tests/baselines/reference/parserShorthandPropertyAssignment2.js
index 95d2f32ffad0e..0de0fa3829fc6 100644
--- a/tests/baselines/reference/parserShorthandPropertyAssignment2.js
+++ b/tests/baselines/reference/parserShorthandPropertyAssignment2.js
@@ -2,4 +2,4 @@
 var v = { class };
 
 //// [parserShorthandPropertyAssignment2.js]
-var v = { "class":  };
+var v = { class:  };
diff --git a/tests/baselines/reference/parserSuperExpression3.js b/tests/baselines/reference/parserSuperExpression3.js
index 064353669c80c..f311efcd0f6a8 100644
--- a/tests/baselines/reference/parserSuperExpression3.js
+++ b/tests/baselines/reference/parserSuperExpression3.js
@@ -10,7 +10,7 @@ var C = (function () {
     function C() {
     }
     C.prototype.M = function () {
-        this["super"](0);
+        this.super(0);
     };
     return C;
 }());
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution1_classic.js b/tests/baselines/reference/pathMappingBasedModuleResolution1_classic.js
index e8c026429f164..ef34f4285354f 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution1_classic.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution1_classic.js
@@ -5,6 +5,6 @@ export var x = 1;
 //// [f1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution1_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution1_node.js
index 6439d35aadf48..8bea317f07fe5 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution1_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution1_node.js
@@ -4,5 +4,5 @@ export var x = 1;
 
 //// [f1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution2_classic.js b/tests/baselines/reference/pathMappingBasedModuleResolution2_classic.js
index df5115d536042..3a15ccad8c897 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution2_classic.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution2_classic.js
@@ -4,6 +4,6 @@ export var x = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution2_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution2_node.js
index a0c8d5df7ded6..dadb8e760cdb1 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution2_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution2_node.js
@@ -3,5 +3,5 @@ export var x = 1;
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution3_classic.js b/tests/baselines/reference/pathMappingBasedModuleResolution3_classic.js
index 16ef9260e8d12..1ff2aaf0c91fb 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution3_classic.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution3_classic.js
@@ -21,25 +21,25 @@ export var y = 100;
 //// [file3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [file4.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.y = 100;
 });
 //// [file2.js]
 define(["require", "exports", "./file3", "file4"], function (require, exports, file3_1, file4_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = file3_1.x + file4_1.y;
 });
 //// [file1.js]
 // baseUrl set via command line
 define(["require", "exports", "folder2/file2"], function (require, exports, file2_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     use(file2_1.x.toExponential());
 });
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js
index 969a98dc4cc21..89288848adfb3 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution3_node.js
@@ -20,17 +20,17 @@ export var y: number;
 
 //// [file3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file3_1 = require("./file3"); // found with baseurl
 var file4_1 = require("file4"); // found with fallback
 exports.x = file3_1.x + file4_1.y;
 //// [file1.js]
 "use strict";
 // baseUrl set via command line
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file2_1 = require("folder2/file2");
 use(file2_1.x.toExponential());
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution4_classic.js b/tests/baselines/reference/pathMappingBasedModuleResolution4_classic.js
index 2a8254fb69687..77cddcb0d325c 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution4_classic.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution4_classic.js
@@ -19,24 +19,24 @@ export var y = 100;
 //// [file3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [file4.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.y = 100;
 });
 //// [file2.js]
 define(["require", "exports", "./file3", "file4"], function (require, exports, file3_1, file4_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = file3_1.x + file4_1.y;
 });
 //// [file1.js]
 define(["require", "exports", "folder2/file2"], function (require, exports, file2_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     use(file2_1.x.toExponential());
 });
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution4_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution4_node.js
index ff1a51662b062..07d07c76fb54b 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution4_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution4_node.js
@@ -18,16 +18,16 @@ export var y: number;
 
 //// [file3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file3_1 = require("./file3"); // found with baseurl
 var file4_1 = require("file4"); // found with fallback
 exports.x = file3_1.x + file4_1.y;
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file2_1 = require("folder2/file2");
 use(file2_1.x.toExponential());
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution5_classic.js b/tests/baselines/reference/pathMappingBasedModuleResolution5_classic.js
index 1b9782660d8e9..02d922e1e1345 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution5_classic.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution5_classic.js
@@ -28,31 +28,31 @@ export var z1 = 1;
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
 //// [file2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.y = 1;
 });
 //// [file3.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.z = 1;
 });
 //// [file4.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.z1 = 1;
 });
 //// [file1.js]
 define(["require", "exports", "folder2/file1", "folder3/file2", "components/file3", "file4"], function (require, exports, file1_1, file2_1, file3_1, file4_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     use(file1_1.x.toExponential());
     use(file2_1.y.toExponential());
     use(file3_1.z.toExponential());
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js
index 7d10c4d4a8bb5..509fe4cd8ea48 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution5_node.js
@@ -27,19 +27,19 @@ export var z1 = 1;
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.y = 1;
 //// [file4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.z1 = 1;
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file1_1 = require("folder2/file1");
 var file2_1 = require("folder3/file2");
 var file3_1 = require("components/file3");
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution6_classic.js b/tests/baselines/reference/pathMappingBasedModuleResolution6_classic.js
index 3289efd02095f..a6319187abac1 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution6_classic.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution6_classic.js
@@ -14,12 +14,12 @@ export {x} from "../file2";
 //// [file3.js]
 define(["require", "exports", "../file2"], function (require, exports, file2_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = file2_1.x;
 });
 //// [file1.js]
 define(["require", "exports", "./project/file3"], function (require, exports, file3_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     use(file3_1.x.toExponential());
 });
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution6_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution6_node.js
index 74c0f40758abc..99f319c64dec1 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution6_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution6_node.js
@@ -13,11 +13,11 @@ export {x} from "../file2";
 
 //// [file3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file2_1 = require("../file2");
 exports.x = file2_1.x;
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file3_1 = require("./project/file3");
 use(file3_1.x.toFixed());
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution7_classic.js b/tests/baselines/reference/pathMappingBasedModuleResolution7_classic.js
index 55aca054e8249..a8f165152f284 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution7_classic.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution7_classic.js
@@ -31,18 +31,18 @@ export let y: number;
 //// [module2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [file2.js]
 define(["require", "exports", "module1", "templates/module2", "../file3"], function (require, exports, module1_1, module2_1, file3_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = module1_1.a + module2_1.b + file3_1.x;
 });
 //// [file1.js]
 define(["require", "exports", "./project/file2", "module3"], function (require, exports, file2_1, module3_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     use(file2_1.x.toFixed());
     use(module3_1.y.toFixed());
 });
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution7_node.js b/tests/baselines/reference/pathMappingBasedModuleResolution7_node.js
index 303b98f4d83de..4f1e9101634a5 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution7_node.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution7_node.js
@@ -30,17 +30,17 @@ export let y: number;
 
 //// [module2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var module1_1 = require("module1");
 var module2_1 = require("templates/module2");
 var file3_1 = require("../file3");
 exports.x = module1_1.a + module2_1.b + file3_1.x;
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file2_1 = require("./project/file2");
 var module3_1 = require("module3");
 use(file2_1.x.toFixed());
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension.js b/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension.js
index 3a31b8cd95020..36505cff12779 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension.js
@@ -13,14 +13,14 @@ import { bar } from "bar";
 
 //// [foo.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() { }
 exports.foo = foo;
 //// [bar.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function bar() { }
 exports.bar = bar;
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension_failedLookup.js b/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension_failedLookup.js
index e40fe32f46bfe..2191cabeb5e6a 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension_failedLookup.js
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution_withExtension_failedLookup.js
@@ -4,4 +4,4 @@ import { foo } from "foo";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/prespecializedGenericMembers1.js b/tests/baselines/reference/prespecializedGenericMembers1.js
index f7e41263237d6..2d545bbb68429 100644
--- a/tests/baselines/reference/prespecializedGenericMembers1.js
+++ b/tests/baselines/reference/prespecializedGenericMembers1.js
@@ -22,7 +22,7 @@ var catBag = new CatBag(catThing);
 
 //// [prespecializedGenericMembers1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Cat = (function () {
     function Cat() {
     }
diff --git a/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js b/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js
index 9da4e922f77bf..e86795051bc46 100644
--- a/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js
+++ b/tests/baselines/reference/privacyCannotNameVarTypeDeclFile.js
@@ -101,7 +101,7 @@ var privateVarWithPrivateModulePropertyTypes1 = exporter.createExportedWidget4()
 //// [privacyCannotNameVarTypeDeclFile_GlobalWidgets.js]
 //// [privacyCannotNameVarTypeDeclFile_Widgets.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Widget1 = (function () {
     function Widget1() {
         this.name = 'one';
@@ -129,7 +129,7 @@ var SpecializedWidget;
 })(SpecializedWidget = exports.SpecializedWidget || (exports.SpecializedWidget = {}));
 //// [privacyCannotNameVarTypeDeclFile_exporter.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='privacyCannotNameVarTypeDeclFile_GlobalWidgets.ts'/>
 var Widgets = require("./privacyCannotNameVarTypeDeclFile_Widgets");
 var Widgets1 = require("GlobalWidgets");
@@ -151,7 +151,7 @@ function createExportedWidget4() {
 exports.createExportedWidget4 = createExportedWidget4;
 //// [privacyCannotNameVarTypeDeclFile_consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var exporter = require("./privacyCannotNameVarTypeDeclFile_exporter");
 var publicClassWithWithPrivatePropertyTypes = (function () {
     function publicClassWithWithPrivatePropertyTypes() {
diff --git a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js
index 8ddcc60a8ff19..aa489b948db3f 100644
--- a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js
+++ b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter.js
@@ -18,7 +18,7 @@ module Query {
 
 //// [privacyCheckAnonymousFunctionParameter.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1; // Makes this an external module
 var Query;
 (function (Query) {
diff --git a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js
index f18f47c20c312..01dbb1c2e3979 100644
--- a/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js
+++ b/tests/baselines/reference/privacyCheckAnonymousFunctionParameter2.js
@@ -17,7 +17,7 @@ module Q {
 //// [privacyCheckAnonymousFunctionParameter2.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1; // Makes this an external module 
     var Q;
     (function (Q) {
diff --git a/tests/baselines/reference/privacyCheckCallbackOfInterfaceMethodWithTypeParameter.js b/tests/baselines/reference/privacyCheckCallbackOfInterfaceMethodWithTypeParameter.js
index 98e87342287f6..12e3fff5c46f3 100644
--- a/tests/baselines/reference/privacyCheckCallbackOfInterfaceMethodWithTypeParameter.js
+++ b/tests/baselines/reference/privacyCheckCallbackOfInterfaceMethodWithTypeParameter.js
@@ -10,7 +10,7 @@ export interface B<T> extends A<T> {
 //// [privacyCheckCallbackOfInterfaceMethodWithTypeParameter.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 
 
diff --git a/tests/baselines/reference/privacyCheckExternalModuleExportAssignmentOfGenericClass.js b/tests/baselines/reference/privacyCheckExternalModuleExportAssignmentOfGenericClass.js
index b8e8139675bcd..3995c96de72eb 100644
--- a/tests/baselines/reference/privacyCheckExternalModuleExportAssignmentOfGenericClass.js
+++ b/tests/baselines/reference/privacyCheckExternalModuleExportAssignmentOfGenericClass.js
@@ -24,7 +24,7 @@ var Foo = (function () {
 module.exports = Foo;
 //// [privacyCheckExternalModuleExportAssignmentOfGenericClass_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 
 
 //// [privacyCheckExternalModuleExportAssignmentOfGenericClass_0.d.ts]
diff --git a/tests/baselines/reference/privacyCheckOnTypeParameterReferenceInConstructorParameter.js b/tests/baselines/reference/privacyCheckOnTypeParameterReferenceInConstructorParameter.js
index dc868d86bff76..f5d7b5377ecb7 100644
--- a/tests/baselines/reference/privacyCheckOnTypeParameterReferenceInConstructorParameter.js
+++ b/tests/baselines/reference/privacyCheckOnTypeParameterReferenceInConstructorParameter.js
@@ -13,7 +13,7 @@ export class B<T2> {
 //// [privacyCheckOnTypeParameterReferenceInConstructorParameter.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A(callback) {
             var child = new B(this);
diff --git a/tests/baselines/reference/privacyCheckTypeOfFunction.js b/tests/baselines/reference/privacyCheckTypeOfFunction.js
index 614bcedebe0de..53a99b1f90b06 100644
--- a/tests/baselines/reference/privacyCheckTypeOfFunction.js
+++ b/tests/baselines/reference/privacyCheckTypeOfFunction.js
@@ -7,7 +7,7 @@ export var b = foo;
 
 //// [privacyCheckTypeOfFunction.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() {
 }
 exports.b = foo;
diff --git a/tests/baselines/reference/privacyClass.js b/tests/baselines/reference/privacyClass.js
index 95b12f4e2fa4f..1fb4758be7752 100644
--- a/tests/baselines/reference/privacyClass.js
+++ b/tests/baselines/reference/privacyClass.js
@@ -139,7 +139,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1;
 (function (m1) {
     var m1_c_public = (function () {
diff --git a/tests/baselines/reference/privacyClassExtendsClauseDeclFile.js b/tests/baselines/reference/privacyClassExtendsClauseDeclFile.js
index 857d52e99bf17..a3a0059482030 100644
--- a/tests/baselines/reference/privacyClassExtendsClauseDeclFile.js
+++ b/tests/baselines/reference/privacyClassExtendsClauseDeclFile.js
@@ -108,7 +108,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var publicModule;
 (function (publicModule) {
     var publicClassInPublicModule = (function () {
diff --git a/tests/baselines/reference/privacyClassImplementsClauseDeclFile.js b/tests/baselines/reference/privacyClassImplementsClauseDeclFile.js
index f4d48aae39d63..50bc9d4da35f4 100644
--- a/tests/baselines/reference/privacyClassImplementsClauseDeclFile.js
+++ b/tests/baselines/reference/privacyClassImplementsClauseDeclFile.js
@@ -95,7 +95,7 @@ class publicClassImplementingPublicInterfaceInGlobal implements publicInterfaceI
 
 //// [privacyClassImplementsClauseDeclFile_externalModule.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var publicModule;
 (function (publicModule) {
     var privateClassImplementingPublicInterfaceInModule = (function () {
diff --git a/tests/baselines/reference/privacyFunctionCannotNameParameterTypeDeclFile.js b/tests/baselines/reference/privacyFunctionCannotNameParameterTypeDeclFile.js
index 6b0ea3cafd220..0d73df0bc8c4d 100644
--- a/tests/baselines/reference/privacyFunctionCannotNameParameterTypeDeclFile.js
+++ b/tests/baselines/reference/privacyFunctionCannotNameParameterTypeDeclFile.js
@@ -157,7 +157,7 @@ function privateFunctionWithPrivateModuleParameterTypes1(param= exporter.createE
 //// [privacyFunctionCannotNameParameterTypeDeclFile_GlobalWidgets.js]
 //// [privacyFunctionCannotNameParameterTypeDeclFile_Widgets.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Widget1 = (function () {
     function Widget1() {
         this.name = 'one';
@@ -185,7 +185,7 @@ var SpecializedWidget;
 })(SpecializedWidget = exports.SpecializedWidget || (exports.SpecializedWidget = {}));
 //// [privacyFunctionCannotNameParameterTypeDeclFile_exporter.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='privacyFunctionCannotNameParameterTypeDeclFile_GlobalWidgets.ts'/>
 var Widgets = require("./privacyFunctionCannotNameParameterTypeDeclFile_Widgets");
 var Widgets1 = require("GlobalWidgets");
@@ -207,7 +207,7 @@ function createExportedWidget4() {
 exports.createExportedWidget4 = createExportedWidget4;
 //// [privacyFunctionCannotNameParameterTypeDeclFile_consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var exporter = require("./privacyFunctionCannotNameParameterTypeDeclFile_exporter");
 var publicClassWithWithPrivateParmeterTypes = (function () {
     function publicClassWithWithPrivateParmeterTypes(param, param1, param2) {
diff --git a/tests/baselines/reference/privacyFunctionCannotNameReturnTypeDeclFile.js b/tests/baselines/reference/privacyFunctionCannotNameReturnTypeDeclFile.js
index 61c7e0014db74..45d60edc44342 100644
--- a/tests/baselines/reference/privacyFunctionCannotNameReturnTypeDeclFile.js
+++ b/tests/baselines/reference/privacyFunctionCannotNameReturnTypeDeclFile.js
@@ -164,7 +164,7 @@ function privateFunctionWithPrivateModuleReturnTypes1() {
 //// [privacyFunctionReturnTypeDeclFile_GlobalWidgets.js]
 //// [privacyFunctionReturnTypeDeclFile_Widgets.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Widget1 = (function () {
     function Widget1() {
         this.name = 'one';
@@ -192,7 +192,7 @@ var SpecializedWidget;
 })(SpecializedWidget = exports.SpecializedWidget || (exports.SpecializedWidget = {}));
 //// [privacyFunctionReturnTypeDeclFile_exporter.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='privacyFunctionReturnTypeDeclFile_GlobalWidgets.ts'/>
 var Widgets = require("./privacyFunctionReturnTypeDeclFile_Widgets");
 var Widgets1 = require("GlobalWidgets");
@@ -214,7 +214,7 @@ function createExportedWidget4() {
 exports.createExportedWidget4 = createExportedWidget4;
 //// [privacyFunctionReturnTypeDeclFile_consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var exporter = require("./privacyFunctionReturnTypeDeclFile_exporter");
 var publicClassWithWithPrivateParmeterTypes = (function () {
     function publicClassWithWithPrivateParmeterTypes() {
diff --git a/tests/baselines/reference/privacyFunctionParameterDeclFile.js b/tests/baselines/reference/privacyFunctionParameterDeclFile.js
index db00fb67d8a21..9729712d8ab10 100644
--- a/tests/baselines/reference/privacyFunctionParameterDeclFile.js
+++ b/tests/baselines/reference/privacyFunctionParameterDeclFile.js
@@ -687,7 +687,7 @@ module publicModuleInGlobal {
 
 //// [privacyFunctionParameterDeclFile_externalModule.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyFunctionReturnTypeDeclFile.js b/tests/baselines/reference/privacyFunctionReturnTypeDeclFile.js
index d3136f4310ed3..edea643cbcfe0 100644
--- a/tests/baselines/reference/privacyFunctionReturnTypeDeclFile.js
+++ b/tests/baselines/reference/privacyFunctionReturnTypeDeclFile.js
@@ -1194,7 +1194,7 @@ module publicModuleInGlobal {
 
 //// [privacyFunctionReturnTypeDeclFile_externalModule.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyGloFunc.js b/tests/baselines/reference/privacyGloFunc.js
index 6bc177946809c..0b457687514f9 100644
--- a/tests/baselines/reference/privacyGloFunc.js
+++ b/tests/baselines/reference/privacyGloFunc.js
@@ -533,7 +533,7 @@ export function f12_public(): C5_private { //error
 //// [privacyGloFunc.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m1;
     (function (m1) {
         var C1_public = (function () {
diff --git a/tests/baselines/reference/privacyImport.js b/tests/baselines/reference/privacyImport.js
index 1a3dc9d9b1891..7167a65be5c24 100644
--- a/tests/baselines/reference/privacyImport.js
+++ b/tests/baselines/reference/privacyImport.js
@@ -358,7 +358,7 @@ export module m3 {
 
 //// [privacyImport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1;
 (function (m1) {
     var m1_M1_public;
diff --git a/tests/baselines/reference/privacyImportParseErrors.js b/tests/baselines/reference/privacyImportParseErrors.js
index 5a15a7280ecdf..fe6b357f16509 100644
--- a/tests/baselines/reference/privacyImportParseErrors.js
+++ b/tests/baselines/reference/privacyImportParseErrors.js
@@ -358,7 +358,7 @@ export module m3 {
 
 //// [privacyImportParseErrors.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1;
 (function (m1) {
     var m1_M1_public;
diff --git a/tests/baselines/reference/privacyInterface.js b/tests/baselines/reference/privacyInterface.js
index 360f1683b6a27..e7e1e3ddf1c23 100644
--- a/tests/baselines/reference/privacyInterface.js
+++ b/tests/baselines/reference/privacyInterface.js
@@ -266,7 +266,7 @@ export interface glo_C6_public extends  glo_i_private, glo_i_public {
 
 //// [privacyInterface.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1;
 (function (m1) {
     var C1_public = (function () {
diff --git a/tests/baselines/reference/privacyInterfaceExtendsClauseDeclFile.js b/tests/baselines/reference/privacyInterfaceExtendsClauseDeclFile.js
index cb25b2b5ff93b..23991f27674ca 100644
--- a/tests/baselines/reference/privacyInterfaceExtendsClauseDeclFile.js
+++ b/tests/baselines/reference/privacyInterfaceExtendsClauseDeclFile.js
@@ -95,5 +95,5 @@ interface publicInterfaceImplementingPublicInterfaceInGlobal extends publicInter
 
 //// [privacyInterfaceExtendsClauseDeclFile_externalModule.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [privacyInterfaceExtendsClauseDeclFile_GlobalFile.js]
diff --git a/tests/baselines/reference/privacyLocalInternalReferenceImportWithExport.js b/tests/baselines/reference/privacyLocalInternalReferenceImportWithExport.js
index 408abc049405b..44645b2c5c9ab 100644
--- a/tests/baselines/reference/privacyLocalInternalReferenceImportWithExport.js
+++ b/tests/baselines/reference/privacyLocalInternalReferenceImportWithExport.js
@@ -154,7 +154,7 @@ module import_private {
 
 //// [privacyLocalInternalReferenceImportWithExport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // private elements
 var m_private;
 (function (m_private) {
diff --git a/tests/baselines/reference/privacyLocalInternalReferenceImportWithoutExport.js b/tests/baselines/reference/privacyLocalInternalReferenceImportWithoutExport.js
index 8b158d7cc3d18..ad9a2655bda31 100644
--- a/tests/baselines/reference/privacyLocalInternalReferenceImportWithoutExport.js
+++ b/tests/baselines/reference/privacyLocalInternalReferenceImportWithoutExport.js
@@ -155,7 +155,7 @@ module import_private {
 //// [privacyLocalInternalReferenceImportWithoutExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // private elements
     var m_private;
     (function (m_private) {
diff --git a/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithExport.js b/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithExport.js
index 312d682669c28..622619cf336e4 100644
--- a/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithExport.js
+++ b/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithExport.js
@@ -52,7 +52,7 @@ export var publicUse_im_public_mi_public = new im_public_mi_public.c_private();
 //// [privacyTopLevelAmbientExternalModuleImportWithExport_require3.js]
 //// [privacyTopLevelAmbientExternalModuleImportWithExport_require.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Public elements
 var c_public = (function () {
     function c_public() {
@@ -62,7 +62,7 @@ var c_public = (function () {
 exports.c_public = c_public;
 //// [privacyTopLevelAmbientExternalModuleImportWithExport_require1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var c_public = (function () {
     function c_public() {
     }
@@ -71,7 +71,7 @@ var c_public = (function () {
 exports.c_public = c_public;
 //// [privacyTopLevelAmbientExternalModuleImportWithExport_core.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='privacyTopLevelAmbientExternalModuleImportWithExport_require2.ts'/>
 ///<reference path='privacyTopLevelAmbientExternalModuleImportWithExport_require3.ts'/>
 // Privacy errors - importing private elements
diff --git a/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithoutExport.js b/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithoutExport.js
index de464ddd11a6a..c8f8e75eafe26 100644
--- a/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithoutExport.js
+++ b/tests/baselines/reference/privacyTopLevelAmbientExternalModuleImportWithoutExport.js
@@ -52,7 +52,7 @@ export var publicUse_im_private_mi_public = new im_private_mi_public.c_public();
 //// [privacyTopLevelAmbientExternalModuleImportWithoutExport_require.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // Public elements
     var c_public = (function () {
         function c_public() {
@@ -64,7 +64,7 @@ define(["require", "exports"], function (require, exports) {
 //// [privacyTopLevelAmbientExternalModuleImportWithoutExport_require1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var c_public = (function () {
         function c_public() {
         }
@@ -75,7 +75,7 @@ define(["require", "exports"], function (require, exports) {
 //// [privacyTopLevelAmbientExternalModuleImportWithoutExport_core.js]
 define(["require", "exports", "m", "m2", "privacyTopLevelAmbientExternalModuleImportWithoutExport_require"], function (require, exports, im_private_mi_private, im_private_mu_private, im_private_mi_public) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // Usage of privacy error imports
     var privateUse_im_private_mi_private = new im_private_mi_private.c_private();
     exports.publicUse_im_private_mi_private = new im_private_mi_private.c_private();
diff --git a/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithExport.js b/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithExport.js
index a89d49609e9cc..1a281295bff60 100644
--- a/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithExport.js
+++ b/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithExport.js
@@ -102,7 +102,7 @@ export var publicUse_im_public_mu_public: im_public_mu_public.i;
 //// [privacyTopLevelInternalReferenceImportWithExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // private elements
     var m_private;
     (function (m_private) {
diff --git a/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithoutExport.js b/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithoutExport.js
index 8646cbe6f7583..6b0823f47d688 100644
--- a/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithoutExport.js
+++ b/tests/baselines/reference/privacyTopLevelInternalReferenceImportWithoutExport.js
@@ -102,7 +102,7 @@ export var publicUse_im_private_mu_public: im_private_mu_public.i;
 //// [privacyTopLevelInternalReferenceImportWithoutExport.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // private elements
     var m_private;
     (function (m_private) {
diff --git a/tests/baselines/reference/privacyTypeParameterOfFunction.js b/tests/baselines/reference/privacyTypeParameterOfFunction.js
index 98e0a57d59ea3..274366d2edb23 100644
--- a/tests/baselines/reference/privacyTypeParameterOfFunction.js
+++ b/tests/baselines/reference/privacyTypeParameterOfFunction.js
@@ -134,7 +134,7 @@ function privateFunctionWithPublicTypeParametersWithoutExtends<T>() {
 
 //// [privacyTypeParameterOfFunction.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyTypeParameterOfFunctionDeclFile.js b/tests/baselines/reference/privacyTypeParameterOfFunctionDeclFile.js
index f5fdf6dfff868..46fc5b996d74e 100644
--- a/tests/baselines/reference/privacyTypeParameterOfFunctionDeclFile.js
+++ b/tests/baselines/reference/privacyTypeParameterOfFunctionDeclFile.js
@@ -440,7 +440,7 @@ module privateModule {
 
 //// [privacyTypeParameterOfFunctionDeclFile.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyTypeParametersOfClass.js b/tests/baselines/reference/privacyTypeParametersOfClass.js
index ba1a9bd10e07a..b5b5a1fd20577 100644
--- a/tests/baselines/reference/privacyTypeParametersOfClass.js
+++ b/tests/baselines/reference/privacyTypeParametersOfClass.js
@@ -45,7 +45,7 @@ class privateClassWithPublicTypeParametersWithoutExtends<T> {
 
 //// [privacyTypeParametersOfClass.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyTypeParametersOfClassDeclFile.js b/tests/baselines/reference/privacyTypeParametersOfClassDeclFile.js
index 8e21589de4229..6abaffa823056 100644
--- a/tests/baselines/reference/privacyTypeParametersOfClassDeclFile.js
+++ b/tests/baselines/reference/privacyTypeParametersOfClassDeclFile.js
@@ -156,7 +156,7 @@ module privateModule {
 
 //// [privacyTypeParametersOfClassDeclFile.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyTypeParametersOfInterface.js b/tests/baselines/reference/privacyTypeParametersOfInterface.js
index 0b511a01f06d9..522733eea4e1a 100644
--- a/tests/baselines/reference/privacyTypeParametersOfInterface.js
+++ b/tests/baselines/reference/privacyTypeParametersOfInterface.js
@@ -60,7 +60,7 @@ interface privateInterfaceWithPublicTypeParametersWithoutExtends<T> {
 
 //// [privacyTypeParametersOfInterface.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyTypeParametersOfInterfaceDeclFile.js b/tests/baselines/reference/privacyTypeParametersOfInterfaceDeclFile.js
index f7d107b5855fb..51d5c67d75660 100644
--- a/tests/baselines/reference/privacyTypeParametersOfInterfaceDeclFile.js
+++ b/tests/baselines/reference/privacyTypeParametersOfInterfaceDeclFile.js
@@ -192,7 +192,7 @@ module privateModule {
 
 //// [privacyTypeParametersOfInterfaceDeclFile.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privacyVar.js b/tests/baselines/reference/privacyVar.js
index 4c97d273c3e98..2fe6ec087af1f 100644
--- a/tests/baselines/reference/privacyVar.js
+++ b/tests/baselines/reference/privacyVar.js
@@ -176,7 +176,7 @@ export var glo_v24_public: glo_C2_private = new glo_C2_private(); // error
 
 //// [privacyVar.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1;
 (function (m1) {
     var C1_public = (function () {
diff --git a/tests/baselines/reference/privacyVarDeclFile.js b/tests/baselines/reference/privacyVarDeclFile.js
index b32fac91085d9..454bb68364ea9 100644
--- a/tests/baselines/reference/privacyVarDeclFile.js
+++ b/tests/baselines/reference/privacyVarDeclFile.js
@@ -426,7 +426,7 @@ module publicModuleInGlobal {
 
 //// [privacyVarDeclFile_externalModule.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.errors.txt b/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.errors.txt
deleted file mode 100644
index 594ed3807a1f1..0000000000000
--- a/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.errors.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(5,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(6,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(10,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(11,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(19,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(20,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(24,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts(25,24): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts (8 errors) ====
-    // no errors
-    
-    class C {
-        private x: string;
-        private get y() { return this.x; }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        private set y(x) { this.y = this.x; }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        private foo() { return this.foo; }
-    
-        private static x: string;
-        private static get y() { return this.x; }
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        private static set y(x) { this.y = this.x; }
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        private static foo() { return this.foo; }
-        private static bar() { this.foo(); }
-    }
-    
-    // added level of function nesting
-    class C2 {
-        private x: string;
-        private get y() { () => this.x; return null; }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        private set y(x) { () => { this.y = this.x; } }
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        private foo() { () => this.foo; }
-    
-        private static x: string;
-        private static get y() { () => this.x; return null; }
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        private static set y(x) {
-                           ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            () => { this.y = this.x; }
-         }
-        private static foo() { () => this.foo; }
-        private static bar() { () => this.foo(); }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.symbols b/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.symbols
new file mode 100644
index 0000000000000..17c8e03e9187f
--- /dev/null
+++ b/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.symbols
@@ -0,0 +1,126 @@
+=== tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts ===
+// no errors
+
+class C {
+>C : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+
+    private x: string;
+>x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 2, 9))
+
+    private get y() { return this.x; }
+>y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 3, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 4, 38))
+>this.x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 2, 9))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 2, 9))
+
+    private set y(x) { this.y = this.x; }
+>y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 3, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 4, 38))
+>x : Symbol(x, Decl(privateClassPropertyAccessibleWithinClass.ts, 5, 18))
+>this.y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 3, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 4, 38))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 3, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 4, 38))
+>this.x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 2, 9))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 2, 9))
+
+    private foo() { return this.foo; }
+>foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 5, 41))
+>this.foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 5, 41))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 5, 41))
+
+    private static x: string;
+>x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 6, 38))
+
+    private static get y() { return this.x; }
+>y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 8, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 9, 45))
+>this.x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 6, 38))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 6, 38))
+
+    private static set y(x) { this.y = this.x; }
+>y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 8, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 9, 45))
+>x : Symbol(x, Decl(privateClassPropertyAccessibleWithinClass.ts, 10, 25))
+>this.y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 8, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 9, 45))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>y : Symbol(C.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 8, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 9, 45))
+>this.x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 6, 38))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>x : Symbol(C.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 6, 38))
+
+    private static foo() { return this.foo; }
+>foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 10, 48))
+>this.foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 10, 48))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 10, 48))
+
+    private static bar() { this.foo(); }
+>bar : Symbol(C.bar, Decl(privateClassPropertyAccessibleWithinClass.ts, 11, 45))
+>this.foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 10, 48))
+>this : Symbol(C, Decl(privateClassPropertyAccessibleWithinClass.ts, 0, 0))
+>foo : Symbol(C.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 10, 48))
+}
+
+// added level of function nesting
+class C2 {
+>C2 : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+
+    private x: string;
+>x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 16, 10))
+
+    private get y() { () => this.x; return null; }
+>y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 17, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 18, 50))
+>this.x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 16, 10))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 16, 10))
+
+    private set y(x) { () => { this.y = this.x; } }
+>y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 17, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 18, 50))
+>x : Symbol(x, Decl(privateClassPropertyAccessibleWithinClass.ts, 19, 18))
+>this.y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 17, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 18, 50))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 17, 22), Decl(privateClassPropertyAccessibleWithinClass.ts, 18, 50))
+>this.x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 16, 10))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 16, 10))
+
+    private foo() { () => this.foo; }
+>foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 19, 51))
+>this.foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 19, 51))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 19, 51))
+
+    private static x: string;
+>x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 20, 37))
+
+    private static get y() { () => this.x; return null; }
+>y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 22, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 23, 57))
+>this.x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 20, 37))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 20, 37))
+
+    private static set y(x) {
+>y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 22, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 23, 57))
+>x : Symbol(x, Decl(privateClassPropertyAccessibleWithinClass.ts, 24, 25))
+
+        () => { this.y = this.x; }
+>this.y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 22, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 23, 57))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>y : Symbol(C2.y, Decl(privateClassPropertyAccessibleWithinClass.ts, 22, 29), Decl(privateClassPropertyAccessibleWithinClass.ts, 23, 57))
+>this.x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 20, 37))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>x : Symbol(C2.x, Decl(privateClassPropertyAccessibleWithinClass.ts, 20, 37))
+     }
+    private static foo() { () => this.foo; }
+>foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 26, 6))
+>this.foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 26, 6))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 26, 6))
+
+    private static bar() { () => this.foo(); }
+>bar : Symbol(C2.bar, Decl(privateClassPropertyAccessibleWithinClass.ts, 27, 44))
+>this.foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 26, 6))
+>this : Symbol(C2, Decl(privateClassPropertyAccessibleWithinClass.ts, 13, 1))
+>foo : Symbol(C2.foo, Decl(privateClassPropertyAccessibleWithinClass.ts, 26, 6))
+}
+
diff --git a/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.types b/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.types
new file mode 100644
index 0000000000000..56aedbe253545
--- /dev/null
+++ b/tests/baselines/reference/privateClassPropertyAccessibleWithinClass.types
@@ -0,0 +1,141 @@
+=== tests/cases/conformance/classes/members/accessibility/privateClassPropertyAccessibleWithinClass.ts ===
+// no errors
+
+class C {
+>C : C
+
+    private x: string;
+>x : string
+
+    private get y() { return this.x; }
+>y : string
+>this.x : string
+>this : this
+>x : string
+
+    private set y(x) { this.y = this.x; }
+>y : string
+>x : string
+>this.y = this.x : string
+>this.y : string
+>this : this
+>y : string
+>this.x : string
+>this : this
+>x : string
+
+    private foo() { return this.foo; }
+>foo : () => any
+>this.foo : () => any
+>this : this
+>foo : () => any
+
+    private static x: string;
+>x : string
+
+    private static get y() { return this.x; }
+>y : string
+>this.x : string
+>this : typeof C
+>x : string
+
+    private static set y(x) { this.y = this.x; }
+>y : string
+>x : string
+>this.y = this.x : string
+>this.y : string
+>this : typeof C
+>y : string
+>this.x : string
+>this : typeof C
+>x : string
+
+    private static foo() { return this.foo; }
+>foo : () => typeof C.foo
+>this.foo : () => typeof C.foo
+>this : typeof C
+>foo : () => typeof C.foo
+
+    private static bar() { this.foo(); }
+>bar : () => void
+>this.foo() : () => typeof C.foo
+>this.foo : () => typeof C.foo
+>this : typeof C
+>foo : () => typeof C.foo
+}
+
+// added level of function nesting
+class C2 {
+>C2 : C2
+
+    private x: string;
+>x : string
+
+    private get y() { () => this.x; return null; }
+>y : any
+>() => this.x : () => string
+>this.x : string
+>this : this
+>x : string
+>null : null
+
+    private set y(x) { () => { this.y = this.x; } }
+>y : any
+>x : any
+>() => { this.y = this.x; } : () => void
+>this.y = this.x : string
+>this.y : any
+>this : this
+>y : any
+>this.x : string
+>this : this
+>x : string
+
+    private foo() { () => this.foo; }
+>foo : () => void
+>() => this.foo : () => () => void
+>this.foo : () => void
+>this : this
+>foo : () => void
+
+    private static x: string;
+>x : string
+
+    private static get y() { () => this.x; return null; }
+>y : any
+>() => this.x : () => string
+>this.x : string
+>this : typeof C2
+>x : string
+>null : null
+
+    private static set y(x) {
+>y : any
+>x : any
+
+        () => { this.y = this.x; }
+>() => { this.y = this.x; } : () => void
+>this.y = this.x : string
+>this.y : any
+>this : typeof C2
+>y : any
+>this.x : string
+>this : typeof C2
+>x : string
+     }
+    private static foo() { () => this.foo; }
+>foo : () => void
+>() => this.foo : () => () => void
+>this.foo : () => void
+>this : typeof C2
+>foo : () => void
+
+    private static bar() { () => this.foo(); }
+>bar : () => void
+>() => this.foo() : () => void
+>this.foo() : void
+>this.foo : () => void
+>this : typeof C2
+>foo : () => void
+}
+
diff --git a/tests/baselines/reference/privatePropertyUsingObjectType.js b/tests/baselines/reference/privatePropertyUsingObjectType.js
index 65e2129a5fc9f..48dc840eb11e7 100644
--- a/tests/baselines/reference/privatePropertyUsingObjectType.js
+++ b/tests/baselines/reference/privatePropertyUsingObjectType.js
@@ -12,7 +12,7 @@ export interface IFilterProvider {
 //// [privatePropertyUsingObjectType.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var FilterManager = (function () {
         function FilterManager() {
         }
diff --git a/tests/baselines/reference/project/baseline/amd/decl.js b/tests/baselines/reference/project/baseline/amd/decl.js
index 1e03f7745d259..e56f886ee7101 100644
--- a/tests/baselines/reference/project/baseline/amd/decl.js
+++ b/tests/baselines/reference/project/baseline/amd/decl.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     ;
     function point(x, y) {
         return { x: x, y: y };
diff --git a/tests/baselines/reference/project/baseline/amd/emit.js b/tests/baselines/reference/project/baseline/amd/emit.js
index b4d6d12445bc9..647ea7c6c8ece 100644
--- a/tests/baselines/reference/project/baseline/amd/emit.js
+++ b/tests/baselines/reference/project/baseline/amd/emit.js
@@ -1,5 +1,5 @@
 define(["require", "exports", "./decl"], function (require, exports, g) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var p = g.point(10, 20);
 });
diff --git a/tests/baselines/reference/project/baseline/node/decl.js b/tests/baselines/reference/project/baseline/node/decl.js
index b7047c3f0473f..ecd7de642875d 100644
--- a/tests/baselines/reference/project/baseline/node/decl.js
+++ b/tests/baselines/reference/project/baseline/node/decl.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ;
 function point(x, y) {
     return { x: x, y: y };
diff --git a/tests/baselines/reference/project/baseline/node/emit.js b/tests/baselines/reference/project/baseline/node/emit.js
index 9410f82bc328e..90c9a1547d2fa 100644
--- a/tests/baselines/reference/project/baseline/node/emit.js
+++ b/tests/baselines/reference/project/baseline/node/emit.js
@@ -1,4 +1,4 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var g = require("./decl");
 var p = g.point(10, 20);
diff --git a/tests/baselines/reference/project/baseline2/amd/decl.js b/tests/baselines/reference/project/baseline2/amd/decl.js
index 1e03f7745d259..e56f886ee7101 100644
--- a/tests/baselines/reference/project/baseline2/amd/decl.js
+++ b/tests/baselines/reference/project/baseline2/amd/decl.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     ;
     function point(x, y) {
         return { x: x, y: y };
diff --git a/tests/baselines/reference/project/baseline2/amd/dont_emit.js b/tests/baselines/reference/project/baseline2/amd/dont_emit.js
index 18dae0f6420b3..e93727df1a631 100644
--- a/tests/baselines/reference/project/baseline2/amd/dont_emit.js
+++ b/tests/baselines/reference/project/baseline2/amd/dont_emit.js
@@ -1,5 +1,5 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var p = { x: 10, y: 20 };
 });
diff --git a/tests/baselines/reference/project/baseline2/node/decl.js b/tests/baselines/reference/project/baseline2/node/decl.js
index b7047c3f0473f..ecd7de642875d 100644
--- a/tests/baselines/reference/project/baseline2/node/decl.js
+++ b/tests/baselines/reference/project/baseline2/node/decl.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ;
 function point(x, y) {
     return { x: x, y: y };
diff --git a/tests/baselines/reference/project/baseline2/node/dont_emit.js b/tests/baselines/reference/project/baseline2/node/dont_emit.js
index ce766eee086a3..76446389a37e7 100644
--- a/tests/baselines/reference/project/baseline2/node/dont_emit.js
+++ b/tests/baselines/reference/project/baseline2/node/dont_emit.js
@@ -1,3 +1,3 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var p = { x: 10, y: 20 };
diff --git a/tests/baselines/reference/project/baseline3/amd/nestedModule.js b/tests/baselines/reference/project/baseline3/amd/nestedModule.js
index c4f4e37489dbe..42c02546516a3 100644
--- a/tests/baselines/reference/project/baseline3/amd/nestedModule.js
+++ b/tests/baselines/reference/project/baseline3/amd/nestedModule.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var outer;
     (function (outer) {
         var inner;
diff --git a/tests/baselines/reference/project/baseline3/node/nestedModule.js b/tests/baselines/reference/project/baseline3/node/nestedModule.js
index 345fd8914cc6f..beb22615bf18e 100644
--- a/tests/baselines/reference/project/baseline3/node/nestedModule.js
+++ b/tests/baselines/reference/project/baseline3/node/nestedModule.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var outer;
 (function (outer) {
     var inner;
diff --git a/tests/baselines/reference/project/declarationDir/amd/a.js b/tests/baselines/reference/project/declarationDir/amd/a.js
index 4db463a796620..a1f1c3d9bd0b5 100644
--- a/tests/baselines/reference/project/declarationDir/amd/a.js
+++ b/tests/baselines/reference/project/declarationDir/amd/a.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
diff --git a/tests/baselines/reference/project/declarationDir/amd/subfolder/b.js b/tests/baselines/reference/project/declarationDir/amd/subfolder/b.js
index bdae3c44b0aa1..ca3818a53d729 100644
--- a/tests/baselines/reference/project/declarationDir/amd/subfolder/b.js
+++ b/tests/baselines/reference/project/declarationDir/amd/subfolder/b.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function () {
         function B() {
         }
diff --git a/tests/baselines/reference/project/declarationDir/amd/subfolder/c.js b/tests/baselines/reference/project/declarationDir/amd/subfolder/c.js
index ff657652a4a98..d8b60f0daec58 100644
--- a/tests/baselines/reference/project/declarationDir/amd/subfolder/c.js
+++ b/tests/baselines/reference/project/declarationDir/amd/subfolder/c.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C = (function () {
         function C() {
         }
diff --git a/tests/baselines/reference/project/declarationDir/node/a.js b/tests/baselines/reference/project/declarationDir/node/a.js
index 2139e86c811c4..51f73513ad326 100644
--- a/tests/baselines/reference/project/declarationDir/node/a.js
+++ b/tests/baselines/reference/project/declarationDir/node/a.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
diff --git a/tests/baselines/reference/project/declarationDir/node/subfolder/b.js b/tests/baselines/reference/project/declarationDir/node/subfolder/b.js
index df27fec56d182..9ea046c8ed374 100644
--- a/tests/baselines/reference/project/declarationDir/node/subfolder/b.js
+++ b/tests/baselines/reference/project/declarationDir/node/subfolder/b.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
diff --git a/tests/baselines/reference/project/declarationDir/node/subfolder/c.js b/tests/baselines/reference/project/declarationDir/node/subfolder/c.js
index 385b6df759167..339257769a20a 100644
--- a/tests/baselines/reference/project/declarationDir/node/subfolder/c.js
+++ b/tests/baselines/reference/project/declarationDir/node/subfolder/c.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/project/declarationDir2/amd/out/a.js b/tests/baselines/reference/project/declarationDir2/amd/out/a.js
index 4db463a796620..a1f1c3d9bd0b5 100644
--- a/tests/baselines/reference/project/declarationDir2/amd/out/a.js
+++ b/tests/baselines/reference/project/declarationDir2/amd/out/a.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
diff --git a/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/b.js b/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/b.js
index bdae3c44b0aa1..ca3818a53d729 100644
--- a/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/b.js
+++ b/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/b.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function () {
         function B() {
         }
diff --git a/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/c.js b/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/c.js
index ff657652a4a98..d8b60f0daec58 100644
--- a/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/c.js
+++ b/tests/baselines/reference/project/declarationDir2/amd/out/subfolder/c.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C = (function () {
         function C() {
         }
diff --git a/tests/baselines/reference/project/declarationDir2/node/out/a.js b/tests/baselines/reference/project/declarationDir2/node/out/a.js
index 2139e86c811c4..51f73513ad326 100644
--- a/tests/baselines/reference/project/declarationDir2/node/out/a.js
+++ b/tests/baselines/reference/project/declarationDir2/node/out/a.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var A = (function () {
     function A() {
     }
diff --git a/tests/baselines/reference/project/declarationDir2/node/out/subfolder/b.js b/tests/baselines/reference/project/declarationDir2/node/out/subfolder/b.js
index df27fec56d182..9ea046c8ed374 100644
--- a/tests/baselines/reference/project/declarationDir2/node/out/subfolder/b.js
+++ b/tests/baselines/reference/project/declarationDir2/node/out/subfolder/b.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var B = (function () {
     function B() {
     }
diff --git a/tests/baselines/reference/project/declarationDir2/node/out/subfolder/c.js b/tests/baselines/reference/project/declarationDir2/node/out/subfolder/c.js
index 385b6df759167..339257769a20a 100644
--- a/tests/baselines/reference/project/declarationDir2/node/out/subfolder/c.js
+++ b/tests/baselines/reference/project/declarationDir2/node/out/subfolder/c.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
diff --git a/tests/baselines/reference/project/declarationDir3/amd/out.js b/tests/baselines/reference/project/declarationDir3/amd/out.js
index b90d4415806a6..0fadf1e9e2f67 100644
--- a/tests/baselines/reference/project/declarationDir3/amd/out.js
+++ b/tests/baselines/reference/project/declarationDir3/amd/out.js
@@ -1,6 +1,6 @@
 define("subfolder/b", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var B = (function () {
         function B() {
         }
@@ -10,7 +10,7 @@ define("subfolder/b", ["require", "exports"], function (require, exports) {
 });
 define("a", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -20,7 +20,7 @@ define("a", ["require", "exports"], function (require, exports) {
 });
 define("subfolder/c", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var C = (function () {
         function C() {
         }
diff --git a/tests/baselines/reference/project/declarationsCascadingImports/amd/m4.js b/tests/baselines/reference/project/declarationsCascadingImports/amd/m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsCascadingImports/amd/m4.js
+++ b/tests/baselines/reference/project/declarationsCascadingImports/amd/m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsCascadingImports/node/m4.js b/tests/baselines/reference/project/declarationsCascadingImports/node/m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsCascadingImports/node/m4.js
+++ b/tests/baselines/reference/project/declarationsCascadingImports/node/m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsGlobalImport/amd/glo_m4.js b/tests/baselines/reference/project/declarationsGlobalImport/amd/glo_m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsGlobalImport/amd/glo_m4.js
+++ b/tests/baselines/reference/project/declarationsGlobalImport/amd/glo_m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsGlobalImport/amd/useModule.js b/tests/baselines/reference/project/declarationsGlobalImport/amd/useModule.js
index 1610052986d7e..3b52083e818aa 100644
--- a/tests/baselines/reference/project/declarationsGlobalImport/amd/useModule.js
+++ b/tests/baselines/reference/project/declarationsGlobalImport/amd/useModule.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "glo_m4"], function (require, exports, glo_m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.useGlo_m4_x4 = glo_m4.x;
     exports.useGlo_m4_d4 = glo_m4.d;
     exports.useGlo_m4_f4 = glo_m4.foo();
diff --git a/tests/baselines/reference/project/declarationsGlobalImport/node/glo_m4.js b/tests/baselines/reference/project/declarationsGlobalImport/node/glo_m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsGlobalImport/node/glo_m4.js
+++ b/tests/baselines/reference/project/declarationsGlobalImport/node/glo_m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsGlobalImport/node/useModule.js b/tests/baselines/reference/project/declarationsGlobalImport/node/useModule.js
index b7ddd253b1a93..869f36da817cb 100644
--- a/tests/baselines/reference/project/declarationsGlobalImport/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsGlobalImport/node/useModule.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var glo_m4 = require("glo_m4");
 exports.useGlo_m4_x4 = glo_m4.x;
 exports.useGlo_m4_d4 = glo_m4.d;
diff --git a/tests/baselines/reference/project/declarationsImportedInPrivate/amd/private_m4.js b/tests/baselines/reference/project/declarationsImportedInPrivate/amd/private_m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsImportedInPrivate/amd/private_m4.js
+++ b/tests/baselines/reference/project/declarationsImportedInPrivate/amd/private_m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsImportedInPrivate/amd/useModule.js b/tests/baselines/reference/project/declarationsImportedInPrivate/amd/useModule.js
index 6ecb0c59793af..6fe8dd5553adb 100644
--- a/tests/baselines/reference/project/declarationsImportedInPrivate/amd/useModule.js
+++ b/tests/baselines/reference/project/declarationsImportedInPrivate/amd/useModule.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "private_m4"], function (require, exports, private_m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var usePrivate_m4_m1;
     (function (usePrivate_m4_m1) {
         var x3 = private_m4.x;
diff --git a/tests/baselines/reference/project/declarationsImportedInPrivate/node/private_m4.js b/tests/baselines/reference/project/declarationsImportedInPrivate/node/private_m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsImportedInPrivate/node/private_m4.js
+++ b/tests/baselines/reference/project/declarationsImportedInPrivate/node/private_m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsImportedInPrivate/node/useModule.js b/tests/baselines/reference/project/declarationsImportedInPrivate/node/useModule.js
index 79310d89c02b4..80b2642bf2b86 100644
--- a/tests/baselines/reference/project/declarationsImportedInPrivate/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsImportedInPrivate/node/useModule.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // only used privately no need to emit
 var private_m4 = require("private_m4");
 var usePrivate_m4_m1;
diff --git a/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/fncOnly_m4.js b/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/fncOnly_m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/fncOnly_m4.js
+++ b/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/fncOnly_m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/useModule.js b/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/useModule.js
index c6c57dabc810d..8ea0b3ecaa05d 100644
--- a/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/useModule.js
+++ b/tests/baselines/reference/project/declarationsImportedUseInFunction/amd/useModule.js
@@ -1,5 +1,5 @@
 define(["require", "exports", "fncOnly_m4"], function (require, exports, fncOnly_m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.useFncOnly_m4_f4 = fncOnly_m4.foo();
 });
diff --git a/tests/baselines/reference/project/declarationsImportedUseInFunction/node/fncOnly_m4.js b/tests/baselines/reference/project/declarationsImportedUseInFunction/node/fncOnly_m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsImportedUseInFunction/node/fncOnly_m4.js
+++ b/tests/baselines/reference/project/declarationsImportedUseInFunction/node/fncOnly_m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsImportedUseInFunction/node/useModule.js b/tests/baselines/reference/project/declarationsImportedUseInFunction/node/useModule.js
index 991afa567cffe..c3b0063547a37 100644
--- a/tests/baselines/reference/project/declarationsImportedUseInFunction/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsImportedUseInFunction/node/useModule.js
@@ -1,4 +1,4 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var fncOnly_m4 = require("fncOnly_m4");
 exports.useFncOnly_m4_f4 = fncOnly_m4.foo();
diff --git a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m4.js b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m4.js
+++ b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m5.js b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m5.js
index 1a0305591ccbd..4c8dc0c5bc6ba 100644
--- a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m5.js
+++ b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/m5.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m4"], function (require, exports, m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo2() {
         return new m4.d();
     }
diff --git a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/useModule.js b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/useModule.js
index 6f962bd42e5ed..228e666438f60 100644
--- a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/useModule.js
+++ b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/amd/useModule.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m5"], function (require, exports, m5) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.d = m5.foo2();
     exports.x = m5.foo2;
     function n() {
diff --git a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m4.js b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m4.js
+++ b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js
index db280e7fd8e1b..da452a5dd1492 100644
--- a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js
+++ b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/m5.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m4 = require("m4"); // Emit used
 function foo2() {
     return new m4.d();
diff --git a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/useModule.js b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/useModule.js
index 7cc88b54ff394..15a4a5040b385 100644
--- a/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsIndirectImportShouldResultInError/node/useModule.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Do not emit unused import
 var m5 = require("m5");
 exports.d = m5.foo2();
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/m4.js b/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/m4.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/useModule.js b/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/useModule.js
index 5375f44c01361..5dca5e455091a 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/useModule.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesImport/amd/useModule.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m4", "m4"], function (require, exports, m4, multiImport_m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x4 = m4.x;
     exports.d4 = m4.d;
     exports.f4 = m4.foo();
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesImport/node/m4.js b/tests/baselines/reference/project/declarationsMultipleTimesImport/node/m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesImport/node/m4.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesImport/node/m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js b/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js
index 395cbeee96693..b59db54829079 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesImport/node/useModule.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m4 = require("m4"); // Emit used
 exports.x4 = m4.x;
 exports.d4 = m4.d;
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m4.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m4.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m5.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m5.js
index 1a0305591ccbd..4c8dc0c5bc6ba 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m5.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/m5.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m4"], function (require, exports, m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function foo2() {
         return new m4.d();
     }
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/useModule.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/useModule.js
index b8a22cfdc1f76..99a4aee63a5ae 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/useModule.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/amd/useModule.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m4", "m5"], function (require, exports, m4, m5) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x4 = m4.x;
     exports.d4 = m4.d;
     exports.f4 = m4.foo();
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m4.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m4.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js
index db280e7fd8e1b..da452a5dd1492 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/m5.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m4 = require("m4"); // Emit used
 function foo2() {
     return new m4.d();
diff --git a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js
index 49958bb9814bc..bb9c112c50d65 100644
--- a/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsMultipleTimesMultipleImport/node/useModule.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m4 = require("m4"); // Emit used
 exports.x4 = m4.x;
 exports.d4 = m4.d;
diff --git a/tests/baselines/reference/project/declarationsSimpleImport/amd/m4.js b/tests/baselines/reference/project/declarationsSimpleImport/amd/m4.js
index d1c2d5f4aca40..2ff15b12d6c2e 100644
--- a/tests/baselines/reference/project/declarationsSimpleImport/amd/m4.js
+++ b/tests/baselines/reference/project/declarationsSimpleImport/amd/m4.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var d = (function () {
         function d() {
         }
diff --git a/tests/baselines/reference/project/declarationsSimpleImport/amd/useModule.js b/tests/baselines/reference/project/declarationsSimpleImport/amd/useModule.js
index af5fcb7d87409..c960e57060484 100644
--- a/tests/baselines/reference/project/declarationsSimpleImport/amd/useModule.js
+++ b/tests/baselines/reference/project/declarationsSimpleImport/amd/useModule.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m4"], function (require, exports, m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x4 = m4.x;
     exports.d4 = m4.d;
     exports.f4 = m4.foo();
diff --git a/tests/baselines/reference/project/declarationsSimpleImport/node/m4.js b/tests/baselines/reference/project/declarationsSimpleImport/node/m4.js
index 1c9931a6d1dc8..e6d99b2cb8929 100644
--- a/tests/baselines/reference/project/declarationsSimpleImport/node/m4.js
+++ b/tests/baselines/reference/project/declarationsSimpleImport/node/m4.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var d = (function () {
     function d() {
     }
diff --git a/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js b/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js
index 3a5602a21664d..9241d18705194 100644
--- a/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js
+++ b/tests/baselines/reference/project/declarationsSimpleImport/node/useModule.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m4 = require("m4"); // Emit used
 exports.x4 = m4.x;
 exports.d4 = m4.d;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js
index 7eeee43049b85..d0ae0291de186 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js
index d393dda0c5749..14338d7f52ce1 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index 7eeee43049b85..d0ae0291de186 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index d393dda0c5749..14338d7f52ce1 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index 1c199b7384adb..d921ef46d9232 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index 749fbd732a5b9..45b58d25d902c 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js
index c67e35d1b89b4..1264f15db5dd1 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js
index 1935dadfdb358..32fedae4b7d72 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js
index fa9c56910474d..ca6a7146d22d4 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js
index dabe72d27872a..0d5a5944c4ed2 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js
index d28465d805ea8..51966c80f4315 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/test.js
index 46d82346a3749..2a8e86fcaf9ef 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 1935dadfdb358..32fedae4b7d72 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index fa9c56910474d..ca6a7146d22d4 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index c67e35d1b89b4..1264f15db5dd1 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index d28465d805ea8..51966c80f4315 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index 46d82346a3749..2a8e86fcaf9ef 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index dabe72d27872a..0d5a5944c4ed2 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index 371d873f34591..da0a0adf86cc4 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js
index 1f3b6d7a6dcf5..0ece461e71517 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/test.js
index a112cba6d0e90..c9855609a46d1 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/m1.js
index a6a299a8a7eb0..ab9e4150fb61d 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/test.js
index 94e4facb645a8..8396c5c721fb3 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index 1f3b6d7a6dcf5..0ece461e71517 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index a112cba6d0e90..c9855609a46d1 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index a6a299a8a7eb0..ab9e4150fb61d 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index 94e4facb645a8..8396c5c721fb3 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
index c5e2f0c04bf73..ee61edd6cbbe9 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js
index 8359b4472ee37..204f203ea02ee 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js
index 32cd3e8915e13..21892f5286e7e 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js
index 39f0b1365680c..82fac44c69fc8 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/test.js
index 61925246a0e91..e5f7b56c67149 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 8359b4472ee37..204f203ea02ee 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index 32cd3e8915e13..21892f5286e7e 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index 39f0b1365680c..82fac44c69fc8 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 61925246a0e91..e5f7b56c67149 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 11d40e4d23be7..b25d5f3150785 100644
--- a/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js
index c467f0b8be0aa..5d25d0d40dd21 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js
index d43267b1c9a13..3a69b4a45f68b 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index 9a46a37deb80e..23c6132b6732a 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 727afdc29fd5a..9710fbfc827d3 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index 2a89c0fc929bc..dffac182acb7b 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index 62af54d370044..e627411eb5c8e 100644
--- a/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/mapRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js
index 6cf63b567ba6e..68f7385329e09 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js
index 2a191801c438a..a974e99d36781 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/test.js
index 2dcea15d05055..f1c957da942af 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js
index 28edf7546504a..2d5686dea0284 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js
index 9a8f5b774980b..43565256b4a4e 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/test.js
index 603b29da7fac8..23dce2210c557 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 4090486a73038..7d43827a1747e 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index f637a581e133f..42896312df8a4 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index fa97d15a89a17..8df7c84af5b94 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 8de8d6f84b688..4724fc84bc75d 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index ca070c2062fb7..54aac5b8bcff2 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 6ce6e73202e8e..d6a5c414b74f8 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index e4a7bb40897a2..59916781e2080 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/m1.js
index b890ae8232aa5..7923dc8adb042 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/test.js
index 2cbff5fc156d3..e333213361ea8 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/m1.js
index a0cc81f5af957..a4bc9e338a42f 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/test.js
index 2cce36f74c262..b54b00a127882 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index f5001a6551e1f..93a3130599c94 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index 2fb4fbfd5c382..a2f2c6c179c5a 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 0110f9dce1662..cf0586a078865 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index 4849c53d0c431..2f554b96d6c10 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
index 587721fb87ae8..d4c121ea5ec7f 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js
index b99a41c8c3cc1..08964ddaec9cd 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/test.js
index c4c2a04f642fd..587434f4011e3 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js
index 9574bd33b835a..b39dd8630c704 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/test.js
index 4ac58aea85631..b17345860faf3 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 2885a499091ac..907eef66d429b 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index 0ee63c4207043..e07e16d9f4942 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index fa9502d4d6475..096f875ced4a3 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index cabfd9f98d668..2703437560398 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index d6d1268972139..a87481475bf94 100644
--- a/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/mapRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
index f373c246d4867..245a41b44e1c2 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/node/ref/m2.js
index 9557c3a613c1c..9e5eaef25273b 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index f373c246d4867..245a41b44e1c2 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 9557c3a613c1c..9e5eaef25273b 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index d9f0f5b153109..c470ba4f35e0d 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index cc3f604524fcc..4a9d90b07d746 100644
--- a/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/maprootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
index f6057bf162a8e..ba19ca0d04a0b 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
index 196a531920ba4..b1f3bfee08ea1 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/test.js
index b4a0aa2d25d1d..cbcdc152e6bf7 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/diskFile1.js
index 9324632b44acb..94fc1a8b2ce78 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/ref/m1.js
index f590179583204..9bca5531f7456 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/test.js
index e8734ca6d27b0..bdd46ad19c099 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 196a531920ba4..b1f3bfee08ea1 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index b4a0aa2d25d1d..cbcdc152e6bf7 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index f6057bf162a8e..ba19ca0d04a0b 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index f590179583204..9bca5531f7456 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index e8734ca6d27b0..bdd46ad19c099 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 9324632b44acb..94fc1a8b2ce78 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index 1ea95ed9ba028..50968e5a86da6 100644
--- a/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/m1.js
index fc2d3408b2be8..f507dc7c8347f 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/test.js
index 1e0dea14dc890..d85883ff410fe 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/m1.js
index 8a7e9f1069e62..1e06a8c53db80 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/test.js
index d7e6d6733402b..86185d149d70e 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index fc2d3408b2be8..f507dc7c8347f 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index 1e0dea14dc890..d85883ff410fe 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 8a7e9f1069e62..1e06a8c53db80 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index d7e6d6733402b..86185d149d70e 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
index d19b91956859e..e06752c0f43a9 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
index 5aa59f6dc9259..e74d220d8220f 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/test.js
index d56cdf72bf299..dd8e985418d85 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/ref/m1.js
index b4abab78e9aaf..8672bb2bd4650 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/test.js
index 6bc25238daca8..a6b06e1ef599b 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 5aa59f6dc9259..e74d220d8220f 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index d56cdf72bf299..dd8e985418d85 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index b4abab78e9aaf..8672bb2bd4650 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 6bc25238daca8..a6b06e1ef599b 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 63e58be27dc68..2b05ef8059e38 100644
--- a/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
index f373c246d4867..245a41b44e1c2 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js
index 9557c3a613c1c..9e5eaef25273b 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index f373c246d4867..245a41b44e1c2 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 9557c3a613c1c..9e5eaef25273b 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index d9f0f5b153109..c470ba4f35e0d 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index cc3f604524fcc..4a9d90b07d746 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
index f6057bf162a8e..ba19ca0d04a0b 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
index 196a531920ba4..b1f3bfee08ea1 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/test.js
index b4a0aa2d25d1d..cbcdc152e6bf7 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js
index 9324632b44acb..94fc1a8b2ce78 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js
index f590179583204..9bca5531f7456 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/test.js
index e8734ca6d27b0..bdd46ad19c099 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 196a531920ba4..b1f3bfee08ea1 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index b4a0aa2d25d1d..cbcdc152e6bf7 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index f6057bf162a8e..ba19ca0d04a0b 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index f590179583204..9bca5531f7456 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index e8734ca6d27b0..bdd46ad19c099 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 9324632b44acb..94fc1a8b2ce78 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index 1ea95ed9ba028..50968e5a86da6 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/m1.js
index fc2d3408b2be8..f507dc7c8347f 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/test.js
index 1e0dea14dc890..d85883ff410fe 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/m1.js
index 8a7e9f1069e62..1e06a8c53db80 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/test.js
index d7e6d6733402b..86185d149d70e 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index fc2d3408b2be8..f507dc7c8347f 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index 1e0dea14dc890..d85883ff410fe 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 8a7e9f1069e62..1e06a8c53db80 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index d7e6d6733402b..86185d149d70e 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
index d19b91956859e..e06752c0f43a9 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
index 5aa59f6dc9259..e74d220d8220f 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/test.js
index d56cdf72bf299..dd8e985418d85 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js
index b4abab78e9aaf..8672bb2bd4650 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/test.js
index 6bc25238daca8..a6b06e1ef599b 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 5aa59f6dc9259..e74d220d8220f 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index d56cdf72bf299..dd8e985418d85 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index b4abab78e9aaf..8672bb2bd4650 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 6bc25238daca8..a6b06e1ef599b 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 63e58be27dc68..2b05ef8059e38 100644
--- a/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/maprootUrlsourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/nodeModulesImportHigher/amd/importHigher/root.js b/tests/baselines/reference/project/nodeModulesImportHigher/amd/importHigher/root.js
index 65e3b33be1a80..15d7b1dd43044 100644
--- a/tests/baselines/reference/project/nodeModulesImportHigher/amd/importHigher/root.js
+++ b/tests/baselines/reference/project/nodeModulesImportHigher/amd/importHigher/root.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     m1.f1("test");
     m1.f2.a = 10;
     m1.f2.person.age = "10"; // Error: Should be number (if direct import of m2 made the m3 module visible). 
diff --git a/tests/baselines/reference/project/nodeModulesImportHigher/node/importHigher/root.js b/tests/baselines/reference/project/nodeModulesImportHigher/node/importHigher/root.js
index 4fc36cd0222e6..ae48958106a95 100644
--- a/tests/baselines/reference/project/nodeModulesImportHigher/node/importHigher/root.js
+++ b/tests/baselines/reference/project/nodeModulesImportHigher/node/importHigher/root.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 m1.f1("test");
 m1.f2.a = 10;
diff --git a/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/amd/maxDepthExceeded/built/root.js b/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/amd/maxDepthExceeded/built/root.js
index 493e1b9636e3d..dd162fc2f89f2 100644
--- a/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/amd/maxDepthExceeded/built/root.js
+++ b/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/amd/maxDepthExceeded/built/root.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     m1.f1("test");
     m1.f2.a = "10"; // Error: Should be number
     m1.rel = 42; // Error: Should be boolean
diff --git a/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/node/maxDepthExceeded/built/root.js b/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/node/maxDepthExceeded/built/root.js
index 5137083683789..9597d626ed7c2 100644
--- a/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/node/maxDepthExceeded/built/root.js
+++ b/tests/baselines/reference/project/nodeModulesMaxDepthExceeded/node/maxDepthExceeded/built/root.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 m1.f1("test");
 m1.f2.a = "10"; // Error: Should be number
diff --git a/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/amd/maxDepthIncreased/root.js b/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/amd/maxDepthIncreased/root.js
index 948a6d68b8338..0cc4ffe817ce8 100644
--- a/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/amd/maxDepthIncreased/root.js
+++ b/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/amd/maxDepthIncreased/root.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1", "m4"], function (require, exports, m1, m4) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     m1.f1("test");
     m1.f2.a = 10;
     m1.f2.person.age = "10"; // Should error if loaded the .js files correctly
diff --git a/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/node/maxDepthIncreased/root.js b/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/node/maxDepthIncreased/root.js
index 50feab5d27f86..5c69ac5bc9250 100644
--- a/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/node/maxDepthIncreased/root.js
+++ b/tests/baselines/reference/project/nodeModulesMaxDepthIncreased/node/maxDepthIncreased/root.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 var m4 = require("m4");
 m1.f1("test");
diff --git a/tests/baselines/reference/project/nonRelative/amd/consume.js b/tests/baselines/reference/project/nonRelative/amd/consume.js
index a6bce0ab2c63f..4a0971e868d4d 100644
--- a/tests/baselines/reference/project/nonRelative/amd/consume.js
+++ b/tests/baselines/reference/project/nonRelative/amd/consume.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "decl", "lib/foo/a", "lib/bar/a"], function (require, exports, mod, x, y) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     x.hello();
     y.hello();
     var str = mod.call();
diff --git a/tests/baselines/reference/project/nonRelative/amd/decl.js b/tests/baselines/reference/project/nonRelative/amd/decl.js
index d22c3ced24e55..4c5b37dcd1eab 100644
--- a/tests/baselines/reference/project/nonRelative/amd/decl.js
+++ b/tests/baselines/reference/project/nonRelative/amd/decl.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function call() {
         return "success";
     }
diff --git a/tests/baselines/reference/project/nonRelative/amd/lib/bar/a.js b/tests/baselines/reference/project/nonRelative/amd/lib/bar/a.js
index b92af88609dd4..6c90d9d231dea 100644
--- a/tests/baselines/reference/project/nonRelative/amd/lib/bar/a.js
+++ b/tests/baselines/reference/project/nonRelative/amd/lib/bar/a.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function hello() { }
     exports.hello = hello;
 });
diff --git a/tests/baselines/reference/project/nonRelative/amd/lib/foo/a.js b/tests/baselines/reference/project/nonRelative/amd/lib/foo/a.js
index b92af88609dd4..6c90d9d231dea 100644
--- a/tests/baselines/reference/project/nonRelative/amd/lib/foo/a.js
+++ b/tests/baselines/reference/project/nonRelative/amd/lib/foo/a.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function hello() { }
     exports.hello = hello;
 });
diff --git a/tests/baselines/reference/project/nonRelative/amd/lib/foo/b.js b/tests/baselines/reference/project/nonRelative/amd/lib/foo/b.js
index b92af88609dd4..6c90d9d231dea 100644
--- a/tests/baselines/reference/project/nonRelative/amd/lib/foo/b.js
+++ b/tests/baselines/reference/project/nonRelative/amd/lib/foo/b.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function hello() { }
     exports.hello = hello;
 });
diff --git a/tests/baselines/reference/project/nonRelative/node/consume.js b/tests/baselines/reference/project/nonRelative/node/consume.js
index 51d811bb72ada..8812f79110e77 100644
--- a/tests/baselines/reference/project/nonRelative/node/consume.js
+++ b/tests/baselines/reference/project/nonRelative/node/consume.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var mod = require("decl");
 var x = require("lib/foo/a");
 var y = require("lib/bar/a");
diff --git a/tests/baselines/reference/project/nonRelative/node/decl.js b/tests/baselines/reference/project/nonRelative/node/decl.js
index 7cde1400c608e..f4e8efac9bd8c 100644
--- a/tests/baselines/reference/project/nonRelative/node/decl.js
+++ b/tests/baselines/reference/project/nonRelative/node/decl.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function call() {
     return "success";
 }
diff --git a/tests/baselines/reference/project/nonRelative/node/lib/bar/a.js b/tests/baselines/reference/project/nonRelative/node/lib/bar/a.js
index c83848543b20f..183e73a24a1a1 100644
--- a/tests/baselines/reference/project/nonRelative/node/lib/bar/a.js
+++ b/tests/baselines/reference/project/nonRelative/node/lib/bar/a.js
@@ -1,4 +1,4 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function hello() { }
 exports.hello = hello;
diff --git a/tests/baselines/reference/project/nonRelative/node/lib/foo/a.js b/tests/baselines/reference/project/nonRelative/node/lib/foo/a.js
index c83848543b20f..183e73a24a1a1 100644
--- a/tests/baselines/reference/project/nonRelative/node/lib/foo/a.js
+++ b/tests/baselines/reference/project/nonRelative/node/lib/foo/a.js
@@ -1,4 +1,4 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function hello() { }
 exports.hello = hello;
diff --git a/tests/baselines/reference/project/nonRelative/node/lib/foo/b.js b/tests/baselines/reference/project/nonRelative/node/lib/foo/b.js
index c83848543b20f..183e73a24a1a1 100644
--- a/tests/baselines/reference/project/nonRelative/node/lib/foo/b.js
+++ b/tests/baselines/reference/project/nonRelative/node/lib/foo/b.js
@@ -1,4 +1,4 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function hello() { }
 exports.hello = hello;
diff --git a/tests/baselines/reference/project/outMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/outMixedSubfolderNoOutdir/amd/ref/m2.js
index 257b2bbaa8fc8..3ff4f2092e37a 100644
--- a/tests/baselines/reference/project/outMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/outMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/outMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/outMixedSubfolderNoOutdir/node/ref/m2.js
index 7a90183baf30b..4e54885a80618 100644
--- a/tests/baselines/reference/project/outMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/outMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index 257b2bbaa8fc8..3ff4f2092e37a 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 7a90183baf30b..4e54885a80618 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index ef652b9e92970..b31010492032d 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index ef652b9e92970..b31010492032d 100644
--- a/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/outMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/diskFile0.js b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/diskFile0.js
index 257b2bbaa8fc8..3ff4f2092e37a 100644
--- a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/diskFile0.js
+++ b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/diskFile0.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/ref/m1.js
index b5ccdc63b22ee..0fa6be4fd5dae 100644
--- a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/test.js
index fb9329a59b47e..6d1a128390c70 100644
--- a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/diskFile0.js b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/diskFile0.js
index 7a90183baf30b..4e54885a80618 100644
--- a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/diskFile0.js
+++ b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/diskFile0.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/ref/m1.js
index 52ebad557038b..b6ae4af7b313f 100644
--- a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/test.js
index 18fccdca8bbd2..c67bb6c8f14dd 100644
--- a/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/outModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index b5ccdc63b22ee..0fa6be4fd5dae 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index fb9329a59b47e..6d1a128390c70 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 257b2bbaa8fc8..3ff4f2092e37a 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 52ebad557038b..b6ae4af7b313f 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index 18fccdca8bbd2..c67bb6c8f14dd 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 7a90183baf30b..4e54885a80618 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index adb1b5061b50d..d046a97dc7ff9 100644
--- a/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/outModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/m1.js
index b5ccdc63b22ee..0fa6be4fd5dae 100644
--- a/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/test.js
index c062c0ac6d4a8..333c3b4d87628 100644
--- a/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/outModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/m1.js
index 52ebad557038b..b6ae4af7b313f 100644
--- a/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/test.js
index 2e50e0b798937..d08047d908777 100644
--- a/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/outModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index b5ccdc63b22ee..0fa6be4fd5dae 100644
--- a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index c062c0ac6d4a8..333c3b4d87628 100644
--- a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 52ebad557038b..b6ae4af7b313f 100644
--- a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index 2e50e0b798937..d08047d908777 100644
--- a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/bin/test.js
index 0a1f6b523c998..49a7ee96981e9 100644
--- a/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/outModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/ref/m1.js
index b5ccdc63b22ee..0fa6be4fd5dae 100644
--- a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/test.js
index 0fdf8d91b324b..81c9dcd9fd89c 100644
--- a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/ref/m1.js
index 52ebad557038b..b6ae4af7b313f 100644
--- a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/test.js
index 33f201ce9d5e2..10d4c642989ee 100644
--- a/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/outModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index b5ccdc63b22ee..0fa6be4fd5dae 100644
--- a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index 0fdf8d91b324b..81c9dcd9fd89c 100644
--- a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index 52ebad557038b..b6ae4af7b313f 100644
--- a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 33f201ce9d5e2..10d4c642989ee 100644
--- a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 2ddfb9277a3ad..bea92a7f2653e 100644
--- a/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/outModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index f070fff6f1cb8..39da758ce9cac 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index 3e02cc09fcb7a..4cd82e7ddeb9d 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index b77e0a462a773..4028a44cd30e2 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
index cbe79e3318b88..406c9de1cd354 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 22a9cf7b4d73d..220b429a89a4a 100644
--- a/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootAbsolutePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index f070fff6f1cb8..39da758ce9cac 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index 3e02cc09fcb7a..4cd82e7ddeb9d 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index b77e0a462a773..4028a44cd30e2 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
index cbe79e3318b88..406c9de1cd354 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 22a9cf7b4d73d..220b429a89a4a 100644
--- a/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourceRootRelativePathModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/amd/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/node/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index f070fff6f1cb8..39da758ce9cac 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index 3e02cc09fcb7a..4cd82e7ddeb9d 100644
--- a/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/sourcemapMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/diskFile1.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/diskFile1.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index b77e0a462a773..4028a44cd30e2 100644
--- a/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/bin/test.js
index cbe79e3318b88..406c9de1cd354 100644
--- a/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 22a9cf7b4d73d..220b429a89a4a 100644
--- a/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcemapModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/amd/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderNoOutdir/node/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
index f070fff6f1cb8..39da758ce9cac 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
index 3e02cc09fcb7a..4cd82e7ddeb9d 100644
--- a/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
+++ b/tests/baselines/reference/project/sourcerootUrlMixedSubfolderSpecifyOutputFileAndOutputDirectory/amd/bin/outAndOutDirFile.js
@@ -10,7 +10,7 @@ function m1_f1() {
 }
 define("ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/diskFile1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/diskFile1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
index 90f7f12fcb186..9cb9049b30fc9 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1", "../outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 08855ec797b4d..b0d7bf62675db 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/amd/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
index 43d151f3fd963..b0fc9573dcd51 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 var m2 = require("../outputdir_module_multifolder_ref/m2");
 exports.a1 = 10;
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
index 8ad833cd4eba9..477a6c9173c45 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputDirectory/node/outdir/simple/outputdir_module_multifolder_ref/m2.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m2_a1 = 10;
 var m2_c1 = (function () {
     function m2_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
index b77e0a462a773..4028a44cd30e2 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleMultifolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("outputdir_module_multifolder/ref/m1", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m2_a1 = 10;
     var m2_c1 = (function () {
         function m2_c1() {
@@ -32,7 +32,7 @@ define("outputdir_module_multifolder_ref/m2", ["require", "exports"], function (
 });
 define("outputdir_module_multifolder/test", ["require", "exports", "outputdir_module_multifolder/ref/m1", "outputdir_module_multifolder_ref/m2"], function (require, exports, m1, m2) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
index e5ed53fd0e1a2..1fe1fc0e3f547 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
index 56c8debf9b699..d6f4719f4c2e9 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
index cbe79e3318b88..406c9de1cd354 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSimpleSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/amd/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderNoOutdir/node/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
index 391c6ef6630d8..4ed4d91ad41cb 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/ref/m1.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
index c95451ac730f8..6718e0d789853 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/amd/outdir/simple/test.js
@@ -1,6 +1,6 @@
 define(["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
index 02586d67fcc6d..7dd20b3aa5c85 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/ref/m1.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m1_a1 = 10;
 var m1_c1 = (function () {
     function m1_c1() {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
index 97ca26f319840..f975c00ba542c 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputDirectory/node/outdir/simple/test.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m1 = require("ref/m1");
 exports.a1 = 10;
 var c1 = (function () {
diff --git a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
index 22a9cf7b4d73d..220b429a89a4a 100644
--- a/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
+++ b/tests/baselines/reference/project/sourcerootUrlModuleSubfolderSpecifyOutputFile/amd/bin/test.js
@@ -1,6 +1,6 @@
 define("ref/m1", ["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.m1_a1 = 10;
     var m1_c1 = (function () {
         function m1_c1() {
@@ -16,7 +16,7 @@ define("ref/m1", ["require", "exports"], function (require, exports) {
 });
 define("test", ["require", "exports", "ref/m1"], function (require, exports, m1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.a1 = 10;
     var c1 = (function () {
         function c1() {
diff --git a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/commands.js b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/commands.js
index eb08364649a70..98a3e36463644 100644
--- a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/commands.js
+++ b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/commands.js
@@ -1,4 +1,4 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/fs.js b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/fs.js
index 66facecde7f6b..247a41e634e5a 100644
--- a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/fs.js
+++ b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/fs.js
@@ -1,6 +1,6 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var RM = (function () {
         function RM() {
         }
diff --git a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/server.js b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/server.js
index eb08364649a70..98a3e36463644 100644
--- a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/server.js
+++ b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/amd/server.js
@@ -1,4 +1,4 @@
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/commands.js b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/commands.js
index 64cbe53a86127..ce03781e22194 100644
--- a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/commands.js
+++ b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/commands.js
@@ -1,2 +1,2 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/fs.js b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/fs.js
index 221c232222727..db5607d92b807 100644
--- a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/fs.js
+++ b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/fs.js
@@ -1,5 +1,5 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var RM = (function () {
     function RM() {
     }
diff --git a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/server.js b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/server.js
index 64cbe53a86127..ce03781e22194 100644
--- a/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/server.js
+++ b/tests/baselines/reference/project/visibilityOfTypeUsedAcrossModules/node/server.js
@@ -1,2 +1,2 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/promiseIdentity.js b/tests/baselines/reference/promiseIdentity.js
index 526bae62c0812..a4274cc4c5a4c 100644
--- a/tests/baselines/reference/promiseIdentity.js
+++ b/tests/baselines/reference/promiseIdentity.js
@@ -23,7 +23,7 @@ var y: Promise2<any, string>;
 
 //// [promiseIdentity.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 var x;
 // Ok because T in this particular Promise2 is any, as are all the U and W references.
diff --git a/tests/baselines/reference/promiseIdentity2.js b/tests/baselines/reference/promiseIdentity2.js
index 81beb44d78a74..5d617ccd73b20 100644
--- a/tests/baselines/reference/promiseIdentity2.js
+++ b/tests/baselines/reference/promiseIdentity2.js
@@ -13,7 +13,7 @@ var x: Promise<any, string>;
 
 //// [promiseIdentity2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // error because T is string in the first declaration, and T is boolean in the second
 // Return type and callback return type are ok because T is any in this particular Promise
 var x;
diff --git a/tests/baselines/reference/promiseIdentityWithAny.js b/tests/baselines/reference/promiseIdentityWithAny.js
index 422d00a131272..3b5eb8505ff01 100644
--- a/tests/baselines/reference/promiseIdentityWithAny.js
+++ b/tests/baselines/reference/promiseIdentityWithAny.js
@@ -12,7 +12,7 @@ var x: Promise<string, boolean>;
 
 //// [promiseIdentityWithAny.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Should be ok because signature type parameters get erased to any
 var x;
 var x;
diff --git a/tests/baselines/reference/promiseIdentityWithAny2.js b/tests/baselines/reference/promiseIdentityWithAny2.js
index a26cfd0508448..9ba95603961e9 100644
--- a/tests/baselines/reference/promiseIdentityWithAny2.js
+++ b/tests/baselines/reference/promiseIdentityWithAny2.js
@@ -24,7 +24,7 @@ var y: Promise2<string, boolean>;
 
 //// [promiseIdentityWithAny2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Error because type parameter arity doesn't match
 var x;
 var x;
diff --git a/tests/baselines/reference/promiseIdentityWithConstraints.js b/tests/baselines/reference/promiseIdentityWithConstraints.js
index 5c0549dc99d78..565fb2c6d5be3 100644
--- a/tests/baselines/reference/promiseIdentityWithConstraints.js
+++ b/tests/baselines/reference/promiseIdentityWithConstraints.js
@@ -12,7 +12,7 @@ var x: Promise<string, boolean>;
 
 //// [promiseIdentityWithConstraints.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Error because constraint V doesn't match
 var x;
 var x;
diff --git a/tests/baselines/reference/propertyAccessNumericLiterals.errors.txt b/tests/baselines/reference/propertyAccessNumericLiterals.errors.txt
new file mode 100644
index 0000000000000..d5bffbb1d2798
--- /dev/null
+++ b/tests/baselines/reference/propertyAccessNumericLiterals.errors.txt
@@ -0,0 +1,12 @@
+tests/cases/conformance/expressions/propertyAccess/propertyAccessNumericLiterals.ts(6,1): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o0'.
+
+
+==== tests/cases/conformance/expressions/propertyAccess/propertyAccessNumericLiterals.ts (1 errors) ====
+    0xffffffff.toString();
+    0o01234.toString();
+    0b01101101.toString();
+    1234..toString();
+    1e0.toString();
+    000.toString();
+    ~~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o0'.
\ No newline at end of file
diff --git a/tests/baselines/reference/propertyAndAccessorWithSameName.errors.txt b/tests/baselines/reference/propertyAndAccessorWithSameName.errors.txt
index 620f4dc5940a3..8c01d5840f867 100644
--- a/tests/baselines/reference/propertyAndAccessorWithSameName.errors.txt
+++ b/tests/baselines/reference/propertyAndAccessorWithSameName.errors.txt
@@ -1,25 +1,19 @@
 tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(2,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(3,9): error TS2300: Duplicate identifier 'x'.
 tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(9,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(10,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(10,9): error TS2300: Duplicate identifier 'x'.
 tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(14,13): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(15,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(18,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts(18,9): error TS2300: Duplicate identifier 'x'.
 
 
-==== tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts (11 errors) ====
+==== tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWithSameName.ts (7 errors) ====
     class C {
         x: number;
         ~
 !!! error TS2300: Duplicate identifier 'x'.
         get x() { // error
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'x'.
             return 1;
         }
@@ -31,8 +25,6 @@ tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWi
 !!! error TS2300: Duplicate identifier 'x'.
         set x(v) { } // error
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'x'.
     }
     
@@ -42,14 +34,10 @@ tests/cases/conformance/classes/propertyMemberDeclarations/propertyAndAccessorWi
 !!! error TS2300: Duplicate identifier 'x'.
         get x() { // error
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'x'.
             return 1;
         }
         set x(v) { }
             ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~
 !!! error TS2300: Duplicate identifier 'x'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js b/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js
index 457f929fe623d..09ed2bc41b6f0 100644
--- a/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js
+++ b/tests/baselines/reference/propertyIdentityWithPrivacyMismatch.js
@@ -31,7 +31,7 @@ var y: Foo2;
 //// [propertyIdentityWithPrivacyMismatch_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var x;
     var x; // Should be error (mod1.Foo !== mod2.Foo)
     var Foo1 = (function () {
diff --git a/tests/baselines/reference/protoAsIndexInIndexExpression.js b/tests/baselines/reference/protoAsIndexInIndexExpression.js
index 7805cebbee32d..5f4761cc74d21 100644
--- a/tests/baselines/reference/protoAsIndexInIndexExpression.js
+++ b/tests/baselines/reference/protoAsIndexInIndexExpression.js
@@ -21,7 +21,7 @@ class C {
 
 //// [protoAsIndexInIndexExpression_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [protoAsIndexInIndexExpression_1.js]
 ///<reference path='protoAsIndexInIndexExpression_0.ts'/>
 var EntityPrototype = undefined;
diff --git a/tests/baselines/reference/prototypeOnConstructorFunctions.js b/tests/baselines/reference/prototypeOnConstructorFunctions.js
index de1fec1f7e8ac..d2e5ddde9251f 100644
--- a/tests/baselines/reference/prototypeOnConstructorFunctions.js
+++ b/tests/baselines/reference/prototypeOnConstructorFunctions.js
@@ -12,4 +12,4 @@ i.const.prototype.prop = "yo";
 
 //// [prototypeOnConstructorFunctions.js]
 var i;
-i["const"].prototype.prop = "yo";
+i.const.prototype.prop = "yo";
diff --git a/tests/baselines/reference/quotedAccessorName1.errors.txt b/tests/baselines/reference/quotedAccessorName1.errors.txt
deleted file mode 100644
index 89b2edfd32f51..0000000000000
--- a/tests/baselines/reference/quotedAccessorName1.errors.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-tests/cases/compiler/quotedAccessorName1.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/quotedAccessorName1.ts (1 errors) ====
-    class C {
-        get "foo"() { return 0; }
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/quotedAccessorName1.symbols b/tests/baselines/reference/quotedAccessorName1.symbols
new file mode 100644
index 0000000000000..d7afe8fa3d651
--- /dev/null
+++ b/tests/baselines/reference/quotedAccessorName1.symbols
@@ -0,0 +1,6 @@
+=== tests/cases/compiler/quotedAccessorName1.ts ===
+class C {
+>C : Symbol(C, Decl(quotedAccessorName1.ts, 0, 0))
+
+    get "foo"() { return 0; }
+}
diff --git a/tests/baselines/reference/quotedAccessorName1.types b/tests/baselines/reference/quotedAccessorName1.types
new file mode 100644
index 0000000000000..cbd63c919a6b3
--- /dev/null
+++ b/tests/baselines/reference/quotedAccessorName1.types
@@ -0,0 +1,7 @@
+=== tests/cases/compiler/quotedAccessorName1.ts ===
+class C {
+>C : C
+
+    get "foo"() { return 0; }
+>0 : 0
+}
diff --git a/tests/baselines/reference/quotedAccessorName2.errors.txt b/tests/baselines/reference/quotedAccessorName2.errors.txt
deleted file mode 100644
index 2f74fc528083e..0000000000000
--- a/tests/baselines/reference/quotedAccessorName2.errors.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-tests/cases/compiler/quotedAccessorName2.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/quotedAccessorName2.ts (1 errors) ====
-    class C {
-        static get "foo"() { return 0; }
-                   ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/quotedAccessorName2.symbols b/tests/baselines/reference/quotedAccessorName2.symbols
new file mode 100644
index 0000000000000..5ff7fa26bf574
--- /dev/null
+++ b/tests/baselines/reference/quotedAccessorName2.symbols
@@ -0,0 +1,6 @@
+=== tests/cases/compiler/quotedAccessorName2.ts ===
+class C {
+>C : Symbol(C, Decl(quotedAccessorName2.ts, 0, 0))
+
+    static get "foo"() { return 0; }
+}
diff --git a/tests/baselines/reference/quotedAccessorName2.types b/tests/baselines/reference/quotedAccessorName2.types
new file mode 100644
index 0000000000000..849a986ff1d64
--- /dev/null
+++ b/tests/baselines/reference/quotedAccessorName2.types
@@ -0,0 +1,7 @@
+=== tests/cases/compiler/quotedAccessorName2.ts ===
+class C {
+>C : C
+
+    static get "foo"() { return 0; }
+>0 : 0
+}
diff --git a/tests/baselines/reference/reExportGlobalDeclaration1.js b/tests/baselines/reference/reExportGlobalDeclaration1.js
index 334d20de2144a..00c3bbe3453b5 100644
--- a/tests/baselines/reference/reExportGlobalDeclaration1.js
+++ b/tests/baselines/reference/reExportGlobalDeclaration1.js
@@ -21,4 +21,4 @@ export {b as b2};
 
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/reExportGlobalDeclaration2.js b/tests/baselines/reference/reExportGlobalDeclaration2.js
index 5e58bf4b68ab7..67fe89ac000f4 100644
--- a/tests/baselines/reference/reExportGlobalDeclaration2.js
+++ b/tests/baselines/reference/reExportGlobalDeclaration2.js
@@ -17,4 +17,4 @@ export {I2 as III2};
 
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/reExportGlobalDeclaration3.js b/tests/baselines/reference/reExportGlobalDeclaration3.js
index 0cd5132049d43..c401bcd2efd3d 100644
--- a/tests/baselines/reference/reExportGlobalDeclaration3.js
+++ b/tests/baselines/reference/reExportGlobalDeclaration3.js
@@ -17,4 +17,4 @@ export {NS2 as NNNS2};
 
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/reExportGlobalDeclaration4.js b/tests/baselines/reference/reExportGlobalDeclaration4.js
index d860d20b83c1e..569c0e2c83458 100644
--- a/tests/baselines/reference/reExportGlobalDeclaration4.js
+++ b/tests/baselines/reference/reExportGlobalDeclaration4.js
@@ -17,4 +17,4 @@ export {Cls2 as CCCls2};
 
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/reExportUndefined1.js b/tests/baselines/reference/reExportUndefined1.js
index 3dfacd62df258..1769a5d6a436a 100644
--- a/tests/baselines/reference/reExportUndefined1.js
+++ b/tests/baselines/reference/reExportUndefined1.js
@@ -3,4 +3,4 @@ export { undefined };
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/reExportUndefined2.js b/tests/baselines/reference/reExportUndefined2.js
index 49aacf98e6af8..f4b6f91e020b6 100644
--- a/tests/baselines/reference/reExportUndefined2.js
+++ b/tests/baselines/reference/reExportUndefined2.js
@@ -11,11 +11,11 @@ use(undefined);
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var undefined;
 exports.undefined = undefined;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a_1 = require("./a");
 use(a_1.undefined);
diff --git a/tests/baselines/reference/reactNamespaceImportPresevation.js b/tests/baselines/reference/reactNamespaceImportPresevation.js
index a3e9ac800fee4..5a52664ee1338 100644
--- a/tests/baselines/reference/reactNamespaceImportPresevation.js
+++ b/tests/baselines/reference/reactNamespaceImportPresevation.js
@@ -15,6 +15,6 @@ declare var foo: any;
 
 //// [test.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var myReactLib = require("my-React-Lib"); // should not be elided
 <foo data/>;
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js
index 87ef9fe86710f..7a5d8798c9879 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType1.js
@@ -29,5 +29,5 @@ define(["require", "exports"], function (require, exports) {
 //// [recursiveExportAssignmentAndFindAliasedType1_moduleA.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js
index c38c38ea325c6..17cb34f665880 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType2.js
@@ -33,5 +33,5 @@ define(["require", "exports"], function (require, exports) {
 //// [recursiveExportAssignmentAndFindAliasedType2_moduleA.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js
index 178d8b3b3eed8..7d7c49287eb5d 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType3.js
@@ -37,5 +37,5 @@ define(["require", "exports"], function (require, exports) {
 //// [recursiveExportAssignmentAndFindAliasedType3_moduleA.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js
index 893c4ec990fb1..c1ba34ab2dfc7 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType4.js
@@ -31,5 +31,5 @@ define(["require", "exports"], function (require, exports) {
 //// [recursiveExportAssignmentAndFindAliasedType4_moduleA.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js
index 39cb223d1a0f2..788b958f35274 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType5.js
@@ -40,5 +40,5 @@ define(["require", "exports"], function (require, exports) {
 //// [recursiveExportAssignmentAndFindAliasedType5_moduleA.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js
index d8541df0c2c1a..1508ab3a28ae0 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType6.js
@@ -49,5 +49,5 @@ define(["require", "exports"], function (require, exports) {
 //// [recursiveExportAssignmentAndFindAliasedType6_moduleA.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js
index 01f818d5bb27b..b70a6a3c521cc 100644
--- a/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js
+++ b/tests/baselines/reference/recursiveExportAssignmentAndFindAliasedType7.js
@@ -51,5 +51,5 @@ define(["require", "exports"], function (require, exports) {
 //// [recursiveExportAssignmentAndFindAliasedType7_moduleA.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/recursiveGetterAccess.errors.txt b/tests/baselines/reference/recursiveGetterAccess.errors.txt
deleted file mode 100644
index 160e9280b226a..0000000000000
--- a/tests/baselines/reference/recursiveGetterAccess.errors.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-tests/cases/compiler/recursiveGetterAccess.ts(2,5): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/recursiveGetterAccess.ts (1 errors) ====
-    class MyClass {
-    get testProp() { return this.testProp; }
-        ~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-     
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/recursiveGetterAccess.symbols b/tests/baselines/reference/recursiveGetterAccess.symbols
new file mode 100644
index 0000000000000..fe9b12f0ae2ca
--- /dev/null
+++ b/tests/baselines/reference/recursiveGetterAccess.symbols
@@ -0,0 +1,12 @@
+=== tests/cases/compiler/recursiveGetterAccess.ts ===
+class MyClass {
+>MyClass : Symbol(MyClass, Decl(recursiveGetterAccess.ts, 0, 0))
+
+get testProp() { return this.testProp; }
+>testProp : Symbol(MyClass.testProp, Decl(recursiveGetterAccess.ts, 0, 15))
+>this.testProp : Symbol(MyClass.testProp, Decl(recursiveGetterAccess.ts, 0, 15))
+>this : Symbol(MyClass, Decl(recursiveGetterAccess.ts, 0, 0))
+>testProp : Symbol(MyClass.testProp, Decl(recursiveGetterAccess.ts, 0, 15))
+}
+ 
+
diff --git a/tests/baselines/reference/recursiveGetterAccess.types b/tests/baselines/reference/recursiveGetterAccess.types
new file mode 100644
index 0000000000000..4e8702dffaf3a
--- /dev/null
+++ b/tests/baselines/reference/recursiveGetterAccess.types
@@ -0,0 +1,12 @@
+=== tests/cases/compiler/recursiveGetterAccess.ts ===
+class MyClass {
+>MyClass : MyClass
+
+get testProp() { return this.testProp; }
+>testProp : any
+>this.testProp : any
+>this : this
+>testProp : any
+}
+ 
+
diff --git a/tests/baselines/reference/recursiveInferenceBug.errors.txt b/tests/baselines/reference/recursiveInferenceBug.errors.txt
deleted file mode 100644
index 9e01e36748e7e..0000000000000
--- a/tests/baselines/reference/recursiveInferenceBug.errors.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-tests/cases/compiler/recursiveInferenceBug.ts(9,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/recursiveInferenceBug.ts (1 errors) ====
-    function f(x: number) {
-        var z = f(x);
-        return x;
-    }
-    
-    
-    var zz = {
-        g: () =>{ },
-        get f() { return "abc"; },
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    };
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/recursiveInferenceBug.symbols b/tests/baselines/reference/recursiveInferenceBug.symbols
new file mode 100644
index 0000000000000..4640b4a9ef95e
--- /dev/null
+++ b/tests/baselines/reference/recursiveInferenceBug.symbols
@@ -0,0 +1,26 @@
+=== tests/cases/compiler/recursiveInferenceBug.ts ===
+function f(x: number) {
+>f : Symbol(f, Decl(recursiveInferenceBug.ts, 0, 0))
+>x : Symbol(x, Decl(recursiveInferenceBug.ts, 0, 11))
+
+    var z = f(x);
+>z : Symbol(z, Decl(recursiveInferenceBug.ts, 1, 7))
+>f : Symbol(f, Decl(recursiveInferenceBug.ts, 0, 0))
+>x : Symbol(x, Decl(recursiveInferenceBug.ts, 0, 11))
+
+    return x;
+>x : Symbol(x, Decl(recursiveInferenceBug.ts, 0, 11))
+}
+
+
+var zz = {
+>zz : Symbol(zz, Decl(recursiveInferenceBug.ts, 6, 3))
+
+    g: () =>{ },
+>g : Symbol(g, Decl(recursiveInferenceBug.ts, 6, 10))
+
+    get f() { return "abc"; },
+>f : Symbol(f, Decl(recursiveInferenceBug.ts, 7, 16))
+
+};
+
diff --git a/tests/baselines/reference/recursiveInferenceBug.types b/tests/baselines/reference/recursiveInferenceBug.types
new file mode 100644
index 0000000000000..501ebc1522a1e
--- /dev/null
+++ b/tests/baselines/reference/recursiveInferenceBug.types
@@ -0,0 +1,30 @@
+=== tests/cases/compiler/recursiveInferenceBug.ts ===
+function f(x: number) {
+>f : (x: number) => number
+>x : number
+
+    var z = f(x);
+>z : number
+>f(x) : number
+>f : (x: number) => number
+>x : number
+
+    return x;
+>x : number
+}
+
+
+var zz = {
+>zz : { g: () => void; readonly f: string; }
+>{    g: () =>{ },    get f() { return "abc"; },} : { g: () => void; readonly f: string; }
+
+    g: () =>{ },
+>g : () => void
+>() =>{ } : () => void
+
+    get f() { return "abc"; },
+>f : string
+>"abc" : "abc"
+
+};
+
diff --git a/tests/baselines/reference/recursiveMods.js b/tests/baselines/reference/recursiveMods.js
index f9f48a4a891ce..3ce7075d608ab 100644
--- a/tests/baselines/reference/recursiveMods.js
+++ b/tests/baselines/reference/recursiveMods.js
@@ -25,7 +25,7 @@ export module Foo {
 
 //// [recursiveMods.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo;
 (function (Foo) {
     var C = (function () {
diff --git a/tests/baselines/reference/recursiveSpecializationOfSignatures.errors.txt b/tests/baselines/reference/recursiveSpecializationOfSignatures.errors.txt
deleted file mode 100644
index 2bec20c316a96..0000000000000
--- a/tests/baselines/reference/recursiveSpecializationOfSignatures.errors.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-tests/cases/compiler/recursiveSpecializationOfSignatures.ts(2,5): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/recursiveSpecializationOfSignatures.ts (1 errors) ====
-    class S0<B, A> {
-    set S1(S2: S0<any,any>) {
-        ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    constructor(public S17: S0<any, (S18) => A>) { }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/recursiveSpecializationOfSignatures.symbols b/tests/baselines/reference/recursiveSpecializationOfSignatures.symbols
new file mode 100644
index 0000000000000..95971d31780c8
--- /dev/null
+++ b/tests/baselines/reference/recursiveSpecializationOfSignatures.symbols
@@ -0,0 +1,18 @@
+=== tests/cases/compiler/recursiveSpecializationOfSignatures.ts ===
+class S0<B, A> {
+>S0 : Symbol(S0, Decl(recursiveSpecializationOfSignatures.ts, 0, 0))
+>B : Symbol(B, Decl(recursiveSpecializationOfSignatures.ts, 0, 9))
+>A : Symbol(A, Decl(recursiveSpecializationOfSignatures.ts, 0, 11))
+
+set S1(S2: S0<any,any>) {
+>S1 : Symbol(S0.S1, Decl(recursiveSpecializationOfSignatures.ts, 0, 16))
+>S2 : Symbol(S2, Decl(recursiveSpecializationOfSignatures.ts, 1, 7))
+>S0 : Symbol(S0, Decl(recursiveSpecializationOfSignatures.ts, 0, 0))
+}
+constructor(public S17: S0<any, (S18) => A>) { }
+>S17 : Symbol(S0.S17, Decl(recursiveSpecializationOfSignatures.ts, 3, 12))
+>S0 : Symbol(S0, Decl(recursiveSpecializationOfSignatures.ts, 0, 0))
+>S18 : Symbol(S18, Decl(recursiveSpecializationOfSignatures.ts, 3, 33))
+>A : Symbol(A, Decl(recursiveSpecializationOfSignatures.ts, 0, 11))
+}
+
diff --git a/tests/baselines/reference/recursiveSpecializationOfSignatures.types b/tests/baselines/reference/recursiveSpecializationOfSignatures.types
new file mode 100644
index 0000000000000..7a8a6fe5c58b7
--- /dev/null
+++ b/tests/baselines/reference/recursiveSpecializationOfSignatures.types
@@ -0,0 +1,18 @@
+=== tests/cases/compiler/recursiveSpecializationOfSignatures.ts ===
+class S0<B, A> {
+>S0 : S0<B, A>
+>B : B
+>A : A
+
+set S1(S2: S0<any,any>) {
+>S1 : S0<any, any>
+>S2 : S0<any, any>
+>S0 : S0<B, A>
+}
+constructor(public S17: S0<any, (S18) => A>) { }
+>S17 : S0<any, (S18: any) => A>
+>S0 : S0<B, A>
+>S18 : any
+>A : A
+}
+
diff --git a/tests/baselines/reference/recursiveTypeRelations.js b/tests/baselines/reference/recursiveTypeRelations.js
index d006c9482d833..2c60edee813b1 100644
--- a/tests/baselines/reference/recursiveTypeRelations.js
+++ b/tests/baselines/reference/recursiveTypeRelations.js
@@ -39,7 +39,7 @@ export function css<S extends { [K in keyof S]: string }>(styles: S, ...classNam
 //// [recursiveTypeRelations.js]
 "use strict";
 // Repro from #14896
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Query = (function () {
     function Query() {
     }
diff --git a/tests/baselines/reference/reexportClassDefinition.js b/tests/baselines/reference/reexportClassDefinition.js
index aae728c9e2567..a18f4d0e6d18f 100644
--- a/tests/baselines/reference/reexportClassDefinition.js
+++ b/tests/baselines/reference/reexportClassDefinition.js
@@ -43,7 +43,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo2 = require("./foo2");
 var x = (function (_super) {
     __extends(x, _super);
diff --git a/tests/baselines/reference/relativeNamesInClassicResolution.js b/tests/baselines/reference/relativeNamesInClassicResolution.js
index cb7616243ef4e..f04989770a492 100644
--- a/tests/baselines/reference/relativeNamesInClassicResolution.js
+++ b/tests/baselines/reference/relativeNamesInClassicResolution.js
@@ -9,11 +9,11 @@ export let x = 1;
 //// [a.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [b.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = 1;
 });
diff --git a/tests/baselines/reference/relativePathMustResolve.js b/tests/baselines/reference/relativePathMustResolve.js
index 52e760a0240ea..4cc34627008a0 100644
--- a/tests/baselines/reference/relativePathMustResolve.js
+++ b/tests/baselines/reference/relativePathMustResolve.js
@@ -10,6 +10,6 @@ var z = foo.x + 10;
 
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./test/foo");
 var z = foo.x + 10;
diff --git a/tests/baselines/reference/relativePathToDeclarationFile.js b/tests/baselines/reference/relativePathToDeclarationFile.js
index 58cf090ad86d4..ddc7a2710c8d5 100644
--- a/tests/baselines/reference/relativePathToDeclarationFile.js
+++ b/tests/baselines/reference/relativePathToDeclarationFile.js
@@ -28,7 +28,7 @@ if(foo.M2.x){
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("foo");
 var other = require("./other");
 var relMod = require("./sub/relMod");
diff --git a/tests/baselines/reference/requireAsFunctionInExternalModule.js b/tests/baselines/reference/requireAsFunctionInExternalModule.js
index f4eac77052a0b..ee2bffbd1ee0d 100644
--- a/tests/baselines/reference/requireAsFunctionInExternalModule.js
+++ b/tests/baselines/reference/requireAsFunctionInExternalModule.js
@@ -18,22 +18,22 @@ hello();
 
 //// [c.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function require(a) { }
-exports["default"] = require;
+exports.default = require;
 function has(a) { return true; }
 exports.has = has;
 //// [m.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var c_1 = require("./c");
 function hello() { }
 exports.hello = hello;
 if (c_1.has('ember-debug')) {
-    c_1["default"]('ember-debug');
+    c_1.default('ember-debug');
 }
 //// [m2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m_1 = require("./m");
 m_1.hello();
diff --git a/tests/baselines/reference/requireEmitSemicolon.js b/tests/baselines/reference/requireEmitSemicolon.js
index 667002efeaa67..d46317953c339 100644
--- a/tests/baselines/reference/requireEmitSemicolon.js
+++ b/tests/baselines/reference/requireEmitSemicolon.js
@@ -22,7 +22,7 @@ export module Database {
 //// [requireEmitSemicolon_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Models;
     (function (Models) {
         var Person = (function () {
@@ -36,7 +36,7 @@ define(["require", "exports"], function (require, exports) {
 //// [requireEmitSemicolon_1.js]
 define(["require", "exports", "requireEmitSemicolon_0"], function (require, exports, P) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Database;
     (function (Database) {
         var DB = (function () {
diff --git a/tests/baselines/reference/requireOfAnEmptyFile1.js b/tests/baselines/reference/requireOfAnEmptyFile1.js
index e792d9fa763f5..6eaad4712d1df 100644
--- a/tests/baselines/reference/requireOfAnEmptyFile1.js
+++ b/tests/baselines/reference/requireOfAnEmptyFile1.js
@@ -12,4 +12,4 @@ import fs = require('./requireOfAnEmptyFile1_b');
 //// [requireOfAnEmptyFile1_a.js]
 "use strict";
 //requireOfAnEmptyFile1
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/reservedWords.js b/tests/baselines/reference/reservedWords.js
index 3424c05418175..12fbcae0c651e 100644
--- a/tests/baselines/reference/reservedWords.js
+++ b/tests/baselines/reference/reservedWords.js
@@ -19,16 +19,16 @@ var obj2 = {
 
 //// [reservedWords.js]
 var obj = {
-    "if": 0,
-    "debugger": 2,
-    "break": 3,
-    "function": 4
+    if: 0,
+    debugger: 2,
+    break: 3,
+    function: 4
 };
 //This compiles.
 var obj2 = {
-    "if": 0,
-    "while": 1,
-    "debugger": 2,
-    "break": 3,
-    "function": 4
+    if: 0,
+    while: 1,
+    debugger: 2,
+    break: 3,
+    function: 4
 };
diff --git a/tests/baselines/reference/reservedWords2.js b/tests/baselines/reference/reservedWords2.js
index f172f37d05396..91c740591fd05 100644
--- a/tests/baselines/reference/reservedWords2.js
+++ b/tests/baselines/reference/reservedWords2.js
@@ -15,7 +15,7 @@ enum void {}
 
 //// [reservedWords2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 require();
 while ( = require("dfdf"))
     ;
@@ -28,8 +28,8 @@ function () { }
 throw function () { };
 module;
 void {};
-var _a = { "while": 1, "return": 2 },  = _a["while"],  = _a["return"];
-var _b = { "this": 1, "switch": { "continue": 2 } },  = _b["this"],  = _b["switch"]["continue"];
+var _a = { while: 1, return: 2 },  = _a.while,  = _a.return;
+var _b = { this: 1, switch: { continue: 2 } },  = _b.this,  = _b.switch.continue;
 var _c = void 0;
 debugger;
 if ()
diff --git a/tests/baselines/reference/returnValueInSetter.errors.txt b/tests/baselines/reference/returnValueInSetter.errors.txt
index 4d7b0d185f904..c91e6f489ed85 100644
--- a/tests/baselines/reference/returnValueInSetter.errors.txt
+++ b/tests/baselines/reference/returnValueInSetter.errors.txt
@@ -1,12 +1,9 @@
-tests/cases/compiler/returnValueInSetter.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/returnValueInSetter.ts(3,9): error TS2408: Setters cannot return a value.
 
 
-==== tests/cases/compiler/returnValueInSetter.ts (2 errors) ====
+==== tests/cases/compiler/returnValueInSetter.ts (1 errors) ====
     class f {
         set x(value) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return null; // Should be an error
             ~~~~~~~~~~~~
 !!! error TS2408: Setters cannot return a value.
diff --git a/tests/baselines/reference/reuseInnerModuleMember.js b/tests/baselines/reference/reuseInnerModuleMember.js
index d432daed2a721..bafa91b6a943d 100644
--- a/tests/baselines/reference/reuseInnerModuleMember.js
+++ b/tests/baselines/reference/reuseInnerModuleMember.js
@@ -17,10 +17,10 @@ module bar {
 
 //// [reuseInnerModuleMember_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [reuseInnerModuleMember_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='reuseInnerModuleMember_0.ts'/>
 var bar;
 (function (bar) {
diff --git a/tests/baselines/reference/scannerClass2.js b/tests/baselines/reference/scannerClass2.js
index 339098b481a19..664b50b082cf2 100644
--- a/tests/baselines/reference/scannerClass2.js
+++ b/tests/baselines/reference/scannerClass2.js
@@ -7,7 +7,7 @@
 
 //// [scannerClass2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var LoggerAdapter = (function () {
     function LoggerAdapter(logger) {
         this.logger = logger;
diff --git a/tests/baselines/reference/scannerES3NumericLiteral2.errors.txt b/tests/baselines/reference/scannerES3NumericLiteral2.errors.txt
new file mode 100644
index 0000000000000..4c7345ba8566d
--- /dev/null
+++ b/tests/baselines/reference/scannerES3NumericLiteral2.errors.txt
@@ -0,0 +1,7 @@
+tests/cases/conformance/scanner/ecmascript3/scannerES3NumericLiteral2.ts(1,1): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
+
+
+==== tests/cases/conformance/scanner/ecmascript3/scannerES3NumericLiteral2.ts (1 errors) ====
+    01
+    ~~
+!!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher. Use the syntax '0o1'.
\ No newline at end of file
diff --git a/tests/baselines/reference/scannerEnum1.js b/tests/baselines/reference/scannerEnum1.js
index 75c182206b942..4f06d59757776 100644
--- a/tests/baselines/reference/scannerEnum1.js
+++ b/tests/baselines/reference/scannerEnum1.js
@@ -6,7 +6,7 @@
 
 //// [scannerEnum1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var CodeGenTarget;
 (function (CodeGenTarget) {
     CodeGenTarget[CodeGenTarget["ES3"] = 0] = "ES3";
diff --git a/tests/baselines/reference/scopedPackages.js b/tests/baselines/reference/scopedPackages.js
index 75606d2e1b9e7..c0be6730648c5 100644
--- a/tests/baselines/reference/scopedPackages.js
+++ b/tests/baselines/reference/scopedPackages.js
@@ -17,4 +17,4 @@ import { z } from "@be/bop/e/z";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/scopedPackagesClassic.js b/tests/baselines/reference/scopedPackagesClassic.js
index f42acde230623..9257fc8c7aa30 100644
--- a/tests/baselines/reference/scopedPackagesClassic.js
+++ b/tests/baselines/reference/scopedPackagesClassic.js
@@ -9,4 +9,4 @@ import { x } from "@see/saw";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/setterBeforeGetter.errors.txt b/tests/baselines/reference/setterBeforeGetter.errors.txt
deleted file mode 100644
index 2dbef84d3dd7a..0000000000000
--- a/tests/baselines/reference/setterBeforeGetter.errors.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-tests/cases/compiler/setterBeforeGetter.ts(5,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/setterBeforeGetter.ts(8,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/setterBeforeGetter.ts (2 errors) ====
-    class Foo {
-    
-        private _bar: { a: string; };
-        // should not be an error to order them this way
-        set bar(thing: { a: string; }) {
-            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            this._bar = thing;
-        }
-        get bar(): { a: string; } {
-            ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return this._bar;
-        }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/setterBeforeGetter.symbols b/tests/baselines/reference/setterBeforeGetter.symbols
new file mode 100644
index 0000000000000..d6a227b6f5423
--- /dev/null
+++ b/tests/baselines/reference/setterBeforeGetter.symbols
@@ -0,0 +1,31 @@
+=== tests/cases/compiler/setterBeforeGetter.ts ===
+class Foo {
+>Foo : Symbol(Foo, Decl(setterBeforeGetter.ts, 0, 0))
+
+    private _bar: { a: string; };
+>_bar : Symbol(Foo._bar, Decl(setterBeforeGetter.ts, 0, 11))
+>a : Symbol(a, Decl(setterBeforeGetter.ts, 2, 19))
+
+    // should not be an error to order them this way
+    set bar(thing: { a: string; }) {
+>bar : Symbol(Foo.bar, Decl(setterBeforeGetter.ts, 2, 33), Decl(setterBeforeGetter.ts, 6, 5))
+>thing : Symbol(thing, Decl(setterBeforeGetter.ts, 4, 12))
+>a : Symbol(a, Decl(setterBeforeGetter.ts, 4, 20))
+
+        this._bar = thing;
+>this._bar : Symbol(Foo._bar, Decl(setterBeforeGetter.ts, 0, 11))
+>this : Symbol(Foo, Decl(setterBeforeGetter.ts, 0, 0))
+>_bar : Symbol(Foo._bar, Decl(setterBeforeGetter.ts, 0, 11))
+>thing : Symbol(thing, Decl(setterBeforeGetter.ts, 4, 12))
+    }
+    get bar(): { a: string; } {
+>bar : Symbol(Foo.bar, Decl(setterBeforeGetter.ts, 2, 33), Decl(setterBeforeGetter.ts, 6, 5))
+>a : Symbol(a, Decl(setterBeforeGetter.ts, 7, 16))
+
+        return this._bar;
+>this._bar : Symbol(Foo._bar, Decl(setterBeforeGetter.ts, 0, 11))
+>this : Symbol(Foo, Decl(setterBeforeGetter.ts, 0, 0))
+>_bar : Symbol(Foo._bar, Decl(setterBeforeGetter.ts, 0, 11))
+    }
+}
+
diff --git a/tests/baselines/reference/setterBeforeGetter.types b/tests/baselines/reference/setterBeforeGetter.types
new file mode 100644
index 0000000000000..9b3dd39f1cc91
--- /dev/null
+++ b/tests/baselines/reference/setterBeforeGetter.types
@@ -0,0 +1,32 @@
+=== tests/cases/compiler/setterBeforeGetter.ts ===
+class Foo {
+>Foo : Foo
+
+    private _bar: { a: string; };
+>_bar : { a: string; }
+>a : string
+
+    // should not be an error to order them this way
+    set bar(thing: { a: string; }) {
+>bar : { a: string; }
+>thing : { a: string; }
+>a : string
+
+        this._bar = thing;
+>this._bar = thing : { a: string; }
+>this._bar : { a: string; }
+>this : this
+>_bar : { a: string; }
+>thing : { a: string; }
+    }
+    get bar(): { a: string; } {
+>bar : { a: string; }
+>a : string
+
+        return this._bar;
+>this._bar : { a: string; }
+>this : this
+>_bar : { a: string; }
+    }
+}
+
diff --git a/tests/baselines/reference/setterWithReturn.errors.txt b/tests/baselines/reference/setterWithReturn.errors.txt
index a0f04506a710b..d8a9e79320f1d 100644
--- a/tests/baselines/reference/setterWithReturn.errors.txt
+++ b/tests/baselines/reference/setterWithReturn.errors.txt
@@ -1,14 +1,11 @@
-tests/cases/compiler/setterWithReturn.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/setterWithReturn.ts(4,13): error TS2408: Setters cannot return a value.
 tests/cases/compiler/setterWithReturn.ts(7,13): error TS7027: Unreachable code detected.
 tests/cases/compiler/setterWithReturn.ts(7,13): error TS2408: Setters cannot return a value.
 
 
-==== tests/cases/compiler/setterWithReturn.ts (4 errors) ====
+==== tests/cases/compiler/setterWithReturn.ts (3 errors) ====
     class C234 {
         public set p1(arg1) {
-                   ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             if (true) {
                 return arg1;
                 ~~~~~~~~~~~~
diff --git a/tests/baselines/reference/shebangBeforeReferences.js b/tests/baselines/reference/shebangBeforeReferences.js
index 4ebf692e1d513..641338edcc5d1 100644
--- a/tests/baselines/reference/shebangBeforeReferences.js
+++ b/tests/baselines/reference/shebangBeforeReferences.js
@@ -17,6 +17,6 @@ use(x);
 //// [f.js]
 #!/usr/bin/env node
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var test_1 = require("test");
 use(test_1.x);
diff --git a/tests/baselines/reference/sourceMapValidationImport.js b/tests/baselines/reference/sourceMapValidationImport.js
index 537c3c071350c..593d8ddb43dfe 100644
--- a/tests/baselines/reference/sourceMapValidationImport.js
+++ b/tests/baselines/reference/sourceMapValidationImport.js
@@ -10,7 +10,7 @@ var y = new b();
 
 //// [sourceMapValidationImport.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var m;
 (function (m) {
     var c = (function () {
diff --git a/tests/baselines/reference/sourceMapValidationImport.sourcemap.txt b/tests/baselines/reference/sourceMapValidationImport.sourcemap.txt
index d1fc9b1b72060..e61e7bb887b5f 100644
--- a/tests/baselines/reference/sourceMapValidationImport.sourcemap.txt
+++ b/tests/baselines/reference/sourceMapValidationImport.sourcemap.txt
@@ -9,7 +9,7 @@ emittedFile:tests/cases/compiler/sourceMapValidationImport.js
 sourceFile:sourceMapValidationImport.ts
 -------------------------------------------------------------------
 >>>"use strict";
->>>exports.__esModule = true;
+>>>Object.defineProperty(exports, "__esModule", { value: true });
 >>>var m;
 1 >
 2 >^^^^
diff --git a/tests/baselines/reference/staticGetter1.errors.txt b/tests/baselines/reference/staticGetter1.errors.txt
deleted file mode 100644
index 62b5d9d2fe672..0000000000000
--- a/tests/baselines/reference/staticGetter1.errors.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-tests/cases/compiler/staticGetter1.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/staticGetter1.ts (1 errors) ====
-    // once caused stack overflow
-    class C {
-        static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return this;
-        }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/staticGetter1.symbols b/tests/baselines/reference/staticGetter1.symbols
new file mode 100644
index 0000000000000..c749a5fe1a9fc
--- /dev/null
+++ b/tests/baselines/reference/staticGetter1.symbols
@@ -0,0 +1,13 @@
+=== tests/cases/compiler/staticGetter1.ts ===
+// once caused stack overflow
+class C {
+>C : Symbol(C, Decl(staticGetter1.ts, 0, 0))
+
+    static get x() {
+>x : Symbol(C.x, Decl(staticGetter1.ts, 1, 9))
+
+        return this;
+>this : Symbol(C, Decl(staticGetter1.ts, 0, 0))
+    }
+}
+
diff --git a/tests/baselines/reference/staticGetter1.types b/tests/baselines/reference/staticGetter1.types
new file mode 100644
index 0000000000000..e12e54d5942d8
--- /dev/null
+++ b/tests/baselines/reference/staticGetter1.types
@@ -0,0 +1,13 @@
+=== tests/cases/compiler/staticGetter1.ts ===
+// once caused stack overflow
+class C {
+>C : C
+
+    static get x() {
+>x : typeof C
+
+        return this;
+>this : typeof C
+    }
+}
+
diff --git a/tests/baselines/reference/staticGetterAndSetter.errors.txt b/tests/baselines/reference/staticGetterAndSetter.errors.txt
deleted file mode 100644
index e155d179c3fdf..0000000000000
--- a/tests/baselines/reference/staticGetterAndSetter.errors.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-tests/cases/compiler/staticGetterAndSetter.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/staticGetterAndSetter.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/staticGetterAndSetter.ts (2 errors) ====
-    class Foo {
-        static get Foo():number { return 0; }
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        static set Foo(n: number) {}
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/staticGetterAndSetter.symbols b/tests/baselines/reference/staticGetterAndSetter.symbols
new file mode 100644
index 0000000000000..eb5101fd54cff
--- /dev/null
+++ b/tests/baselines/reference/staticGetterAndSetter.symbols
@@ -0,0 +1,12 @@
+=== tests/cases/compiler/staticGetterAndSetter.ts ===
+class Foo {
+>Foo : Symbol(Foo, Decl(staticGetterAndSetter.ts, 0, 0))
+
+    static get Foo():number { return 0; }
+>Foo : Symbol(Foo.Foo, Decl(staticGetterAndSetter.ts, 0, 11), Decl(staticGetterAndSetter.ts, 1, 41))
+
+    static set Foo(n: number) {}
+>Foo : Symbol(Foo.Foo, Decl(staticGetterAndSetter.ts, 0, 11), Decl(staticGetterAndSetter.ts, 1, 41))
+>n : Symbol(n, Decl(staticGetterAndSetter.ts, 2, 19))
+}
+
diff --git a/tests/baselines/reference/staticGetterAndSetter.types b/tests/baselines/reference/staticGetterAndSetter.types
new file mode 100644
index 0000000000000..d9b19bf1a5c27
--- /dev/null
+++ b/tests/baselines/reference/staticGetterAndSetter.types
@@ -0,0 +1,13 @@
+=== tests/cases/compiler/staticGetterAndSetter.ts ===
+class Foo {
+>Foo : Foo
+
+    static get Foo():number { return 0; }
+>Foo : number
+>0 : 0
+
+    static set Foo(n: number) {}
+>Foo : number
+>n : number
+}
+
diff --git a/tests/baselines/reference/staticInstanceResolution3.js b/tests/baselines/reference/staticInstanceResolution3.js
index 747aa93e63183..6f328d51fc4c1 100644
--- a/tests/baselines/reference/staticInstanceResolution3.js
+++ b/tests/baselines/reference/staticInstanceResolution3.js
@@ -14,7 +14,7 @@ WinJS.Promise.timeout(10);
 
 //// [staticInstanceResolution3_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Promise = (function () {
     function Promise() {
     }
@@ -26,7 +26,7 @@ var Promise = (function () {
 exports.Promise = Promise;
 //// [staticInstanceResolution3_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='staticInstanceResolution3_0.ts'/>
 var WinJS = require("./staticInstanceResolution3_0");
 WinJS.Promise.timeout(10);
diff --git a/tests/baselines/reference/staticInstanceResolution5.js b/tests/baselines/reference/staticInstanceResolution5.js
index 0bbd1cf412f07..670aee6e5c301 100644
--- a/tests/baselines/reference/staticInstanceResolution5.js
+++ b/tests/baselines/reference/staticInstanceResolution5.js
@@ -19,7 +19,7 @@ function z(w3: WinJS) { }
 //// [staticInstanceResolution5_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Promise = (function () {
         function Promise() {
         }
@@ -33,7 +33,7 @@ define(["require", "exports"], function (require, exports) {
 //// [staticInstanceResolution5_1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // these 3 should be errors
     var x = function (w1) { };
     var y = function (w2) { };
diff --git a/tests/baselines/reference/staticMethodWithTypeParameterExtendsClauseDeclFile.js b/tests/baselines/reference/staticMethodWithTypeParameterExtendsClauseDeclFile.js
index b8b5b030bcd87..f8a780b672a48 100644
--- a/tests/baselines/reference/staticMethodWithTypeParameterExtendsClauseDeclFile.js
+++ b/tests/baselines/reference/staticMethodWithTypeParameterExtendsClauseDeclFile.js
@@ -23,7 +23,7 @@ export class publicClassWithWithPrivateTypeParameters {
 
 //// [staticMethodWithTypeParameterExtendsClauseDeclFile.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var privateClass = (function () {
     function privateClass() {
     }
diff --git a/tests/baselines/reference/staticPropertyNotInClassType.errors.txt b/tests/baselines/reference/staticPropertyNotInClassType.errors.txt
index 62f04b5c5fb14..69f839de11e44 100644
--- a/tests/baselines/reference/staticPropertyNotInClassType.errors.txt
+++ b/tests/baselines/reference/staticPropertyNotInClassType.errors.txt
@@ -1,26 +1,18 @@
-tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(4,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(5,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(16,16): error TS2339: Property 'foo' does not exist on type 'C'.
 tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(17,16): error TS2339: Property 'bar' does not exist on type 'C'.
 tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(18,16): error TS2339: Property 'x' does not exist on type 'C'.
-tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(24,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(25,20): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(27,21): error TS2302: Static members cannot reference class type parameters.
 tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(36,16): error TS2339: Property 'foo' does not exist on type 'C<number, string>'.
 tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(37,16): error TS2339: Property 'bar' does not exist on type 'C<number, string>'.
 tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts(38,16): error TS2339: Property 'x' does not exist on type 'C<number, string>'.
 
 
-==== tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts (11 errors) ====
+==== tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.ts (7 errors) ====
     module NonGeneric {
         class C {
             fn() { return this; }
             static get x() { return 1; }
-                       ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             static set x(v) { }
-                       ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             constructor(public a: number, private b: number) { }
             static foo: string; // not reflected in class type
         }
@@ -46,11 +38,7 @@ tests/cases/conformance/classes/members/classTypes/staticPropertyNotInClassType.
         class C<T, U> {
             fn() { return this; }
             static get x() { return 1; }
-                       ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             static set x(v) { }
-                       ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             constructor(public a: T, private b: U) { }
             static foo: T; // not reflected in class type
                         ~
diff --git a/tests/baselines/reference/staticVisibility.errors.txt b/tests/baselines/reference/staticVisibility.errors.txt
index 43691d2744f0e..c3bb70872d9c6 100644
--- a/tests/baselines/reference/staticVisibility.errors.txt
+++ b/tests/baselines/reference/staticVisibility.errors.txt
@@ -2,12 +2,10 @@ tests/cases/compiler/staticVisibility.ts(9,9): error TS2662: Cannot find name 's
 tests/cases/compiler/staticVisibility.ts(12,9): error TS2662: Cannot find name 'b'. Did you mean the static member 'C1.b'?
 tests/cases/compiler/staticVisibility.ts(17,9): error TS2304: Cannot find name 'v'.
 tests/cases/compiler/staticVisibility.ts(18,14): error TS2339: Property 'p' does not exist on type 'typeof C1'.
-tests/cases/compiler/staticVisibility.ts(30,12): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/staticVisibility.ts(32,12): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/staticVisibility.ts(32,29): error TS2304: Cannot find name 'barback'.
 
 
-==== tests/cases/compiler/staticVisibility.ts (7 errors) ====
+==== tests/cases/compiler/staticVisibility.ts (5 errors) ====
     class C1 {
         
         p: any;
@@ -46,12 +44,8 @@ tests/cases/compiler/staticVisibility.ts(32,29): error TS2304: Cannot find name
     
     
     static get Bar() {return "bar";} // ok
-               ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
      
     static set Bar(bar:string) {barback = bar;} // not ok
-               ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                                 ~~~~~~~
 !!! error TS2304: Cannot find name 'barback'.
     
diff --git a/tests/baselines/reference/strictModeReservedWordInImportEqualDeclaration.js b/tests/baselines/reference/strictModeReservedWordInImportEqualDeclaration.js
index 16e8580e727cb..c7676b1de6f57 100644
--- a/tests/baselines/reference/strictModeReservedWordInImportEqualDeclaration.js
+++ b/tests/baselines/reference/strictModeReservedWordInImportEqualDeclaration.js
@@ -4,4 +4,4 @@ import public = require("1");
 
 //// [strictModeReservedWordInImportEqualDeclaration.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt b/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt
index 606cc39afef98..ee6e3fb52c4db 100644
--- a/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt
+++ b/tests/baselines/reference/stringIndexerConstrainsPropertyDeclarations.errors.txt
@@ -4,10 +4,7 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(18,5): error TS2411: Property '2.0' of type 'number' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(20,5): error TS2411: Property '"4.0"' of type 'number' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(21,5): error TS2411: Property 'f' of type 'MyString' is not assignable to string index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(23,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(26,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(28,5): error TS2411: Property 'foo' of type '() => string' is not assignable to string index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(36,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(45,5): error TS2411: Property 'b' of type 'number' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(46,5): error TS2411: Property 'c' of type '() => {}' is not assignable to string index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(48,5): error TS2411: Property '"e"' of type 'number' is not assignable to string index type 'string'.
@@ -25,11 +22,9 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(78,5): error TS2322: Type '{ a: string; b: number; c: () => void; "d": string; "e": number; 1.0: string; 2.0: number; "3.0": string; "4.0": number; f: MyString; X: string; foo(): string; }' is not assignable to type '{ [x: string]: string; }'.
   Property 'b' is incompatible with index signature.
     Type 'number' is not assignable to type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(90,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts(93,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts (27 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerConstrainsPropertyDeclarations.ts (22 errors) ====
     // String indexer types constrain the types of named properties in their containing type
     
     interface MyString extends String {
@@ -65,13 +60,9 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
 !!! error TS2411: Property 'f' of type 'MyString' is not assignable to string index type 'string'.
     
         get X() { // ok
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return '';
         }
         set X(v) { } // ok
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     
         foo() { // error
         ~~~
@@ -84,8 +75,6 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
     
         static foo() { } // ok
         static get X() { // ok
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 1;
         }
     }
@@ -172,13 +161,9 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/stringIndexerCon
         f: <MyString>null, 
     
         get X() { 
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return '';
         },
         set X(v) { }, 
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         foo() { 
             return '';
         }
diff --git a/tests/baselines/reference/super1.js b/tests/baselines/reference/super1.js
index 1ed0edbe0512d..a41ab9e5bcfa4 100644
--- a/tests/baselines/reference/super1.js
+++ b/tests/baselines/reference/super1.js
@@ -102,7 +102,7 @@ var SubSub1 = (function (_super) {
         return _super !== null && _super.apply(this, arguments) || this;
     }
     SubSub1.prototype.bar = function () {
-        return _super.prototype["super"].foo;
+        return _super.prototype.super.foo;
     };
     return SubSub1;
 }(Sub1));
diff --git a/tests/baselines/reference/superCallInNonStaticMethod.errors.txt b/tests/baselines/reference/superCallInNonStaticMethod.errors.txt
deleted file mode 100644
index d92cd22f57ef4..0000000000000
--- a/tests/baselines/reference/superCallInNonStaticMethod.errors.txt
+++ /dev/null
@@ -1,59 +0,0 @@
-tests/cases/compiler/superCallInNonStaticMethod.ts(30,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/superCallInNonStaticMethod.ts(37,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/superCallInNonStaticMethod.ts (2 errors) ====
-    class Doing {
-        public instanceMethod() {
-        }
-    }
-    
-    class Other extends Doing {
-        // in instance method
-        public instanceMethod() {
-            super.instanceMethod();
-        }
-    
-        // in a lambda inside a instance method
-        public lambdaInsideAnInstanceMethod() {
-            () => {
-                super.instanceMethod();
-            }
-        }
-    
-        // in an object literal inside a instance method
-        public objectLiteralInsideAnInstanceMethod() {
-            return {
-                a: () => {
-                    super.instanceMethod();
-                },
-                b: super.instanceMethod()
-            };
-        }
-    
-        // in a getter
-        public get accessor() {
-                   ~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            super.instanceMethod();
-    
-            return 0;
-        }
-    
-        // in a setter
-        public set accessor(value: number) {
-                   ~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            super.instanceMethod();
-        }
-        
-        constructor() {
-            super();
-            super.instanceMethod();
-        }
-        
-        public propertyInitializer = super.instanceMethod();
-        
-        public functionProperty = () => {super.instanceMethod(); };
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/superCallInNonStaticMethod.symbols b/tests/baselines/reference/superCallInNonStaticMethod.symbols
new file mode 100644
index 0000000000000..0d322ec632170
--- /dev/null
+++ b/tests/baselines/reference/superCallInNonStaticMethod.symbols
@@ -0,0 +1,104 @@
+=== tests/cases/compiler/superCallInNonStaticMethod.ts ===
+class Doing {
+>Doing : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+
+    public instanceMethod() {
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+    }
+}
+
+class Other extends Doing {
+>Other : Symbol(Other, Decl(superCallInNonStaticMethod.ts, 3, 1))
+>Doing : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+
+    // in instance method
+    public instanceMethod() {
+>instanceMethod : Symbol(Other.instanceMethod, Decl(superCallInNonStaticMethod.ts, 5, 27))
+
+        super.instanceMethod();
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+    }
+
+    // in a lambda inside a instance method
+    public lambdaInsideAnInstanceMethod() {
+>lambdaInsideAnInstanceMethod : Symbol(Other.lambdaInsideAnInstanceMethod, Decl(superCallInNonStaticMethod.ts, 9, 5))
+
+        () => {
+            super.instanceMethod();
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+        }
+    }
+
+    // in an object literal inside a instance method
+    public objectLiteralInsideAnInstanceMethod() {
+>objectLiteralInsideAnInstanceMethod : Symbol(Other.objectLiteralInsideAnInstanceMethod, Decl(superCallInNonStaticMethod.ts, 16, 5))
+
+        return {
+            a: () => {
+>a : Symbol(a, Decl(superCallInNonStaticMethod.ts, 20, 16))
+
+                super.instanceMethod();
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+
+            },
+            b: super.instanceMethod()
+>b : Symbol(b, Decl(superCallInNonStaticMethod.ts, 23, 14))
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+
+        };
+    }
+
+    // in a getter
+    public get accessor() {
+>accessor : Symbol(Other.accessor, Decl(superCallInNonStaticMethod.ts, 26, 5), Decl(superCallInNonStaticMethod.ts, 33, 5))
+
+        super.instanceMethod();
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+
+        return 0;
+    }
+
+    // in a setter
+    public set accessor(value: number) {
+>accessor : Symbol(Other.accessor, Decl(superCallInNonStaticMethod.ts, 26, 5), Decl(superCallInNonStaticMethod.ts, 33, 5))
+>value : Symbol(value, Decl(superCallInNonStaticMethod.ts, 36, 24))
+
+        super.instanceMethod();
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+    }
+    
+    constructor() {
+        super();
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+
+        super.instanceMethod();
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+    }
+    
+    public propertyInitializer = super.instanceMethod();
+>propertyInitializer : Symbol(Other.propertyInitializer, Decl(superCallInNonStaticMethod.ts, 43, 5))
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+    
+    public functionProperty = () => {super.instanceMethod(); };
+>functionProperty : Symbol(Other.functionProperty, Decl(superCallInNonStaticMethod.ts, 45, 56))
+>super.instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInNonStaticMethod.ts, 0, 0))
+>instanceMethod : Symbol(Doing.instanceMethod, Decl(superCallInNonStaticMethod.ts, 0, 13))
+}
+
diff --git a/tests/baselines/reference/superCallInNonStaticMethod.types b/tests/baselines/reference/superCallInNonStaticMethod.types
new file mode 100644
index 0000000000000..9200140ec3ace
--- /dev/null
+++ b/tests/baselines/reference/superCallInNonStaticMethod.types
@@ -0,0 +1,121 @@
+=== tests/cases/compiler/superCallInNonStaticMethod.ts ===
+class Doing {
+>Doing : Doing
+
+    public instanceMethod() {
+>instanceMethod : () => void
+    }
+}
+
+class Other extends Doing {
+>Other : Other
+>Doing : Doing
+
+    // in instance method
+    public instanceMethod() {
+>instanceMethod : () => void
+
+        super.instanceMethod();
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+    }
+
+    // in a lambda inside a instance method
+    public lambdaInsideAnInstanceMethod() {
+>lambdaInsideAnInstanceMethod : () => void
+
+        () => {
+>() => {            super.instanceMethod();        } : () => void
+
+            super.instanceMethod();
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+        }
+    }
+
+    // in an object literal inside a instance method
+    public objectLiteralInsideAnInstanceMethod() {
+>objectLiteralInsideAnInstanceMethod : () => { a: () => void; b: void; }
+
+        return {
+>{            a: () => {                super.instanceMethod();            },            b: super.instanceMethod()        } : { a: () => void; b: void; }
+
+            a: () => {
+>a : () => void
+>() => {                super.instanceMethod();            } : () => void
+
+                super.instanceMethod();
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+
+            },
+            b: super.instanceMethod()
+>b : void
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+
+        };
+    }
+
+    // in a getter
+    public get accessor() {
+>accessor : number
+
+        super.instanceMethod();
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+
+        return 0;
+>0 : 0
+    }
+
+    // in a setter
+    public set accessor(value: number) {
+>accessor : number
+>value : number
+
+        super.instanceMethod();
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+    }
+    
+    constructor() {
+        super();
+>super() : void
+>super : typeof Doing
+
+        super.instanceMethod();
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+    }
+    
+    public propertyInitializer = super.instanceMethod();
+>propertyInitializer : void
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+    
+    public functionProperty = () => {super.instanceMethod(); };
+>functionProperty : () => void
+>() => {super.instanceMethod(); } : () => void
+>super.instanceMethod() : void
+>super.instanceMethod : () => void
+>super : Doing
+>instanceMethod : () => void
+}
+
diff --git a/tests/baselines/reference/superCallInStaticMethod.errors.txt b/tests/baselines/reference/superCallInStaticMethod.errors.txt
deleted file mode 100644
index 21198aa480dcb..0000000000000
--- a/tests/baselines/reference/superCallInStaticMethod.errors.txt
+++ /dev/null
@@ -1,55 +0,0 @@
-tests/cases/compiler/superCallInStaticMethod.ts(30,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/superCallInStaticMethod.ts(37,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/superCallInStaticMethod.ts (2 errors) ====
-    class Doing {
-        public static staticMethod() {
-        }
-    }
-    
-    class Other extends Doing {
-        // in static method
-        public static staticMethod() {
-            super.staticMethod();
-        }
-    
-        // in a lambda inside a static method
-        public static lambdaInsideAStaticMethod() {
-            () => {
-                super.staticMethod();
-            }
-        }
-    
-        // in an object literal inside a static method
-        public static objectLiteralInsideAStaticMethod() {
-            return {
-                a: () => {
-                    super.staticMethod();
-                },
-                b: super.staticMethod()
-            };
-        }
-    
-        // in a getter
-        public static get staticGetter() {
-                          ~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            super.staticMethod();
-    
-            return 0;
-        }
-    
-        // in a setter
-        public static set staticGetter(value: number) {
-                          ~~~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            super.staticMethod();
-        }
-    
-        // in static method
-        public static initializerInAStaticMethod(a = super.staticMethod()) {
-            super.staticMethod();
-        }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/superCallInStaticMethod.symbols b/tests/baselines/reference/superCallInStaticMethod.symbols
new file mode 100644
index 0000000000000..4cbb2e2187731
--- /dev/null
+++ b/tests/baselines/reference/superCallInStaticMethod.symbols
@@ -0,0 +1,96 @@
+=== tests/cases/compiler/superCallInStaticMethod.ts ===
+class Doing {
+>Doing : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+
+    public static staticMethod() {
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+    }
+}
+
+class Other extends Doing {
+>Other : Symbol(Other, Decl(superCallInStaticMethod.ts, 3, 1))
+>Doing : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+
+    // in static method
+    public static staticMethod() {
+>staticMethod : Symbol(Other.staticMethod, Decl(superCallInStaticMethod.ts, 5, 27))
+
+        super.staticMethod();
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+    }
+
+    // in a lambda inside a static method
+    public static lambdaInsideAStaticMethod() {
+>lambdaInsideAStaticMethod : Symbol(Other.lambdaInsideAStaticMethod, Decl(superCallInStaticMethod.ts, 9, 5))
+
+        () => {
+            super.staticMethod();
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+        }
+    }
+
+    // in an object literal inside a static method
+    public static objectLiteralInsideAStaticMethod() {
+>objectLiteralInsideAStaticMethod : Symbol(Other.objectLiteralInsideAStaticMethod, Decl(superCallInStaticMethod.ts, 16, 5))
+
+        return {
+            a: () => {
+>a : Symbol(a, Decl(superCallInStaticMethod.ts, 20, 16))
+
+                super.staticMethod();
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+
+            },
+            b: super.staticMethod()
+>b : Symbol(b, Decl(superCallInStaticMethod.ts, 23, 14))
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+
+        };
+    }
+
+    // in a getter
+    public static get staticGetter() {
+>staticGetter : Symbol(Other.staticGetter, Decl(superCallInStaticMethod.ts, 26, 5), Decl(superCallInStaticMethod.ts, 33, 5))
+
+        super.staticMethod();
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+
+        return 0;
+    }
+
+    // in a setter
+    public static set staticGetter(value: number) {
+>staticGetter : Symbol(Other.staticGetter, Decl(superCallInStaticMethod.ts, 26, 5), Decl(superCallInStaticMethod.ts, 33, 5))
+>value : Symbol(value, Decl(superCallInStaticMethod.ts, 36, 35))
+
+        super.staticMethod();
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+    }
+
+    // in static method
+    public static initializerInAStaticMethod(a = super.staticMethod()) {
+>initializerInAStaticMethod : Symbol(Other.initializerInAStaticMethod, Decl(superCallInStaticMethod.ts, 38, 5))
+>a : Symbol(a, Decl(superCallInStaticMethod.ts, 41, 45))
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+
+        super.staticMethod();
+>super.staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+>super : Symbol(Doing, Decl(superCallInStaticMethod.ts, 0, 0))
+>staticMethod : Symbol(Doing.staticMethod, Decl(superCallInStaticMethod.ts, 0, 13))
+    }
+}
+
diff --git a/tests/baselines/reference/superCallInStaticMethod.types b/tests/baselines/reference/superCallInStaticMethod.types
new file mode 100644
index 0000000000000..fe14b8c8d91e8
--- /dev/null
+++ b/tests/baselines/reference/superCallInStaticMethod.types
@@ -0,0 +1,110 @@
+=== tests/cases/compiler/superCallInStaticMethod.ts ===
+class Doing {
+>Doing : Doing
+
+    public static staticMethod() {
+>staticMethod : () => void
+    }
+}
+
+class Other extends Doing {
+>Other : Other
+>Doing : Doing
+
+    // in static method
+    public static staticMethod() {
+>staticMethod : () => void
+
+        super.staticMethod();
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+    }
+
+    // in a lambda inside a static method
+    public static lambdaInsideAStaticMethod() {
+>lambdaInsideAStaticMethod : () => void
+
+        () => {
+>() => {            super.staticMethod();        } : () => void
+
+            super.staticMethod();
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+        }
+    }
+
+    // in an object literal inside a static method
+    public static objectLiteralInsideAStaticMethod() {
+>objectLiteralInsideAStaticMethod : () => { a: () => void; b: void; }
+
+        return {
+>{            a: () => {                super.staticMethod();            },            b: super.staticMethod()        } : { a: () => void; b: void; }
+
+            a: () => {
+>a : () => void
+>() => {                super.staticMethod();            } : () => void
+
+                super.staticMethod();
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+
+            },
+            b: super.staticMethod()
+>b : void
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+
+        };
+    }
+
+    // in a getter
+    public static get staticGetter() {
+>staticGetter : number
+
+        super.staticMethod();
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+
+        return 0;
+>0 : 0
+    }
+
+    // in a setter
+    public static set staticGetter(value: number) {
+>staticGetter : number
+>value : number
+
+        super.staticMethod();
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+    }
+
+    // in static method
+    public static initializerInAStaticMethod(a = super.staticMethod()) {
+>initializerInAStaticMethod : (a?: void) => void
+>a : void
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+
+        super.staticMethod();
+>super.staticMethod() : void
+>super.staticMethod : () => void
+>super : typeof Doing
+>staticMethod : () => void
+    }
+}
+
diff --git a/tests/baselines/reference/superPropertyAccess.errors.txt b/tests/baselines/reference/superPropertyAccess.errors.txt
index e1b813453900c..6f1de686726eb 100644
--- a/tests/baselines/reference/superPropertyAccess.errors.txt
+++ b/tests/baselines/reference/superPropertyAccess.errors.txt
@@ -1,5 +1,3 @@
-tests/cases/compiler/superPropertyAccess.ts(7,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/superPropertyAccess.ts(8,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/superPropertyAccess.ts(21,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/compiler/superPropertyAccess.ts(23,15): error TS2341: Property 'p1' is private and only accessible within class 'MyBase'.
 tests/cases/compiler/superPropertyAccess.ts(25,24): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
@@ -8,7 +6,7 @@ tests/cases/compiler/superPropertyAccess.ts(31,15): error TS2340: Only public an
 tests/cases/compiler/superPropertyAccess.ts(33,23): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 
 
-==== tests/cases/compiler/superPropertyAccess.ts (8 errors) ====
+==== tests/cases/compiler/superPropertyAccess.ts (6 errors) ====
     class MyBase {
         m1(a: string) { return a; }
         private p1() { }
@@ -16,11 +14,7 @@ tests/cases/compiler/superPropertyAccess.ts(33,23): error TS2340: Only public an
         d1: number = 42;
         private d2: number = 42;
         get value() {return 0 }
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
         set value(v: number) { }
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
     
     
diff --git a/tests/baselines/reference/superPropertyAccess1.errors.txt b/tests/baselines/reference/superPropertyAccess1.errors.txt
index aed25fd6a92c8..79e7405aaaae7 100644
--- a/tests/baselines/reference/superPropertyAccess1.errors.txt
+++ b/tests/baselines/reference/superPropertyAccess1.errors.txt
@@ -1,16 +1,12 @@
-tests/cases/compiler/superPropertyAccess1.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/superPropertyAccess1.ts(13,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 tests/cases/compiler/superPropertyAccess1.ts(19,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
-tests/cases/compiler/superPropertyAccess1.ts(22,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/superPropertyAccess1.ts(24,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
 
 
-==== tests/cases/compiler/superPropertyAccess1.ts (5 errors) ====
+==== tests/cases/compiler/superPropertyAccess1.ts (3 errors) ====
     class C {
         public foo() { }
         public get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 1;
         }
     
@@ -34,8 +30,6 @@ tests/cases/compiler/superPropertyAccess1.ts(24,15): error TS2340: Only public a
         }
     
         public get y() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             super.bar();
             super.x; // error
                   ~
diff --git a/tests/baselines/reference/superPropertyAccess2.errors.txt b/tests/baselines/reference/superPropertyAccess2.errors.txt
index 2512ad91faec1..54ef546a2efdc 100644
--- a/tests/baselines/reference/superPropertyAccess2.errors.txt
+++ b/tests/baselines/reference/superPropertyAccess2.errors.txt
@@ -1,17 +1,13 @@
-tests/cases/compiler/superPropertyAccess2.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/superPropertyAccess2.ts(13,15): error TS2339: Property 'x' does not exist on type 'typeof C'.
 tests/cases/compiler/superPropertyAccess2.ts(18,15): error TS2339: Property 'bar' does not exist on type 'C'.
 tests/cases/compiler/superPropertyAccess2.ts(19,15): error TS2340: Only public and protected methods of the base class are accessible via the 'super' keyword.
-tests/cases/compiler/superPropertyAccess2.ts(22,23): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/superPropertyAccess2.ts(24,15): error TS2339: Property 'x' does not exist on type 'typeof C'.
 
 
-==== tests/cases/compiler/superPropertyAccess2.ts (6 errors) ====
+==== tests/cases/compiler/superPropertyAccess2.ts (4 errors) ====
     class C {
         public static foo() { }
         public get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 1;
         }
     
@@ -37,8 +33,6 @@ tests/cases/compiler/superPropertyAccess2.ts(24,15): error TS2339: Property 'x'
         }
     
         public static get y() {
-                          ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             super.bar(); // OK
             super.x; // error
                   ~
diff --git a/tests/baselines/reference/super_inside-object-literal-getters-and-setters.errors.txt b/tests/baselines/reference/super_inside-object-literal-getters-and-setters.errors.txt
index 5fe7fa59ff6a9..91b67ce23b2d8 100644
--- a/tests/baselines/reference/super_inside-object-literal-getters-and-setters.errors.txt
+++ b/tests/baselines/reference/super_inside-object-literal-getters-and-setters.errors.txt
@@ -1,26 +1,19 @@
-tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(4,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(5,20): error TS2659: 'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.
-tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(7,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(8,13): error TS2659: 'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.
 tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(11,20): error TS2660: 'super' can only be referenced in members of derived classes or object literal expressions.
-tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(20,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(21,24): error TS2659: 'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.
 
 
-==== tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts (7 errors) ====
+==== tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts (4 errors) ====
     module ObjectLiteral {
         var ThisInObjectLiteral = {
             _foo: '1',
             get foo(): string {
-                ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                 return super._foo;
                        ~~~~~
 !!! error TS2659: 'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.
             },
             set foo(value: string) {
-                ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                 super._foo = value;
                 ~~~~~
 !!! error TS2659: 'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.
@@ -38,8 +31,6 @@ tests/cases/compiler/super_inside-object-literal-getters-and-setters.ts(21,24):
         public testing() {
             var test = {
                 get F() {
-                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                     return super.test();
                            ~~~~~
 !!! error TS2659: 'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.
diff --git a/tests/baselines/reference/systemModule10.js b/tests/baselines/reference/systemModule10.js
index 303e986dcc7e8..c4e343d41d83b 100644
--- a/tests/baselines/reference/systemModule10.js
+++ b/tests/baselines/reference/systemModule10.js
@@ -23,8 +23,8 @@ System.register(["file1", "file2"], function (exports_1, context_1) {
             }
         ],
         execute: function () {
-            exports_1("n", file1_1["default"]);
-            exports_1("n1", file1_1["default"]);
+            exports_1("n", file1_1.default);
+            exports_1("n1", file1_1.default);
             exports_1("x", file1_1.x);
             exports_1("y", file1_1.x);
             exports_1("n2", n2);
diff --git a/tests/baselines/reference/systemModule15.js b/tests/baselines/reference/systemModule15.js
index 0db82701a0174..66f6200d1527e 100644
--- a/tests/baselines/reference/systemModule15.js
+++ b/tests/baselines/reference/systemModule15.js
@@ -68,7 +68,7 @@ System.register(["./file3"], function (exports_1, context_1) {
         ],
         execute: function () {
             exports_1("moduleCStar", moduleCStar);
-            exports_1("moduleC", file3_1["default"]);
+            exports_1("moduleC", file3_1.default);
             exports_1("value", file3_2.value);
         }
     };
diff --git a/tests/baselines/reference/systemModule9.js b/tests/baselines/reference/systemModule9.js
index b83d62f9cf808..abc81ae5ad159 100644
--- a/tests/baselines/reference/systemModule9.js
+++ b/tests/baselines/reference/systemModule9.js
@@ -63,8 +63,8 @@ System.register(["file1", "file2", "file3", "file4", "file5", "file6", "file7"],
             ns.f();
             file2_1.a();
             file2_1.b();
-            file3_1["default"]();
-            file5_1["default"]();
+            file3_1.default();
+            file5_1.default();
             ns2.f();
             ns3.f();
             y = true;
diff --git a/tests/baselines/reference/thisInAccessors.errors.txt b/tests/baselines/reference/thisInAccessors.errors.txt
deleted file mode 100644
index de47da8243416..0000000000000
--- a/tests/baselines/reference/thisInAccessors.errors.txt
+++ /dev/null
@@ -1,51 +0,0 @@
-tests/cases/compiler/thisInAccessors.ts(3,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/thisInAccessors.ts(7,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/thisInAccessors.ts(13,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/thisInAccessors.ts(16,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/thisInAccessors.ts(23,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/thisInAccessors.ts(27,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/thisInAccessors.ts (6 errors) ====
-    // this capture only in getter
-    class GetterOnly {
-        get Value() {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var fn = () => this;
-            return '';
-        }
-        set Value(val) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        }
-    }
-    
-    // this capture only in setter
-    class SetterOnly {
-        get Value() {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return '';
-        }
-        set Value(val) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var fn = () => this;
-        }
-    }
-    
-    // this capture only in both setter and getter
-    class GetterAndSetter {
-        get Value() {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var fn = () => this;
-            return '';
-        }
-        set Value(val) {
-            ~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var fn = () => this;
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/thisInAccessors.symbols b/tests/baselines/reference/thisInAccessors.symbols
new file mode 100644
index 0000000000000..685a5f695e7ae
--- /dev/null
+++ b/tests/baselines/reference/thisInAccessors.symbols
@@ -0,0 +1,61 @@
+=== tests/cases/compiler/thisInAccessors.ts ===
+// this capture only in getter
+class GetterOnly {
+>GetterOnly : Symbol(GetterOnly, Decl(thisInAccessors.ts, 0, 0))
+
+    get Value() {
+>Value : Symbol(GetterOnly.Value, Decl(thisInAccessors.ts, 1, 18), Decl(thisInAccessors.ts, 5, 5))
+
+        var fn = () => this;
+>fn : Symbol(fn, Decl(thisInAccessors.ts, 3, 11))
+>this : Symbol(GetterOnly, Decl(thisInAccessors.ts, 0, 0))
+
+        return '';
+    }
+    set Value(val) {
+>Value : Symbol(GetterOnly.Value, Decl(thisInAccessors.ts, 1, 18), Decl(thisInAccessors.ts, 5, 5))
+>val : Symbol(val, Decl(thisInAccessors.ts, 6, 14))
+    }
+}
+
+// this capture only in setter
+class SetterOnly {
+>SetterOnly : Symbol(SetterOnly, Decl(thisInAccessors.ts, 8, 1))
+
+    get Value() {
+>Value : Symbol(SetterOnly.Value, Decl(thisInAccessors.ts, 11, 18), Decl(thisInAccessors.ts, 14, 5))
+
+        return '';
+    }
+    set Value(val) {
+>Value : Symbol(SetterOnly.Value, Decl(thisInAccessors.ts, 11, 18), Decl(thisInAccessors.ts, 14, 5))
+>val : Symbol(val, Decl(thisInAccessors.ts, 15, 14))
+
+        var fn = () => this;
+>fn : Symbol(fn, Decl(thisInAccessors.ts, 16, 11))
+>this : Symbol(SetterOnly, Decl(thisInAccessors.ts, 8, 1))
+    }
+}
+
+// this capture only in both setter and getter
+class GetterAndSetter {
+>GetterAndSetter : Symbol(GetterAndSetter, Decl(thisInAccessors.ts, 18, 1))
+
+    get Value() {
+>Value : Symbol(GetterAndSetter.Value, Decl(thisInAccessors.ts, 21, 23), Decl(thisInAccessors.ts, 25, 5))
+
+        var fn = () => this;
+>fn : Symbol(fn, Decl(thisInAccessors.ts, 23, 11))
+>this : Symbol(GetterAndSetter, Decl(thisInAccessors.ts, 18, 1))
+
+        return '';
+    }
+    set Value(val) {
+>Value : Symbol(GetterAndSetter.Value, Decl(thisInAccessors.ts, 21, 23), Decl(thisInAccessors.ts, 25, 5))
+>val : Symbol(val, Decl(thisInAccessors.ts, 26, 14))
+
+        var fn = () => this;
+>fn : Symbol(fn, Decl(thisInAccessors.ts, 27, 11))
+>this : Symbol(GetterAndSetter, Decl(thisInAccessors.ts, 18, 1))
+    }
+}
diff --git a/tests/baselines/reference/thisInAccessors.types b/tests/baselines/reference/thisInAccessors.types
new file mode 100644
index 0000000000000..79f8a5c985c0d
--- /dev/null
+++ b/tests/baselines/reference/thisInAccessors.types
@@ -0,0 +1,68 @@
+=== tests/cases/compiler/thisInAccessors.ts ===
+// this capture only in getter
+class GetterOnly {
+>GetterOnly : GetterOnly
+
+    get Value() {
+>Value : string
+
+        var fn = () => this;
+>fn : () => this
+>() => this : () => this
+>this : this
+
+        return '';
+>'' : ""
+    }
+    set Value(val) {
+>Value : string
+>val : string
+    }
+}
+
+// this capture only in setter
+class SetterOnly {
+>SetterOnly : SetterOnly
+
+    get Value() {
+>Value : string
+
+        return '';
+>'' : ""
+    }
+    set Value(val) {
+>Value : string
+>val : string
+
+        var fn = () => this;
+>fn : () => this
+>() => this : () => this
+>this : this
+    }
+}
+
+// this capture only in both setter and getter
+class GetterAndSetter {
+>GetterAndSetter : GetterAndSetter
+
+    get Value() {
+>Value : string
+
+        var fn = () => this;
+>fn : () => this
+>() => this : () => this
+>this : this
+
+        return '';
+>'' : ""
+    }
+    set Value(val) {
+>Value : string
+>val : string
+
+        var fn = () => this;
+>fn : () => this
+>() => this : () => this
+>this : this
+    }
+}
diff --git a/tests/baselines/reference/thisInStatics.errors.txt b/tests/baselines/reference/thisInStatics.errors.txt
deleted file mode 100644
index a8e8edbb76907..0000000000000
--- a/tests/baselines/reference/thisInStatics.errors.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-tests/cases/compiler/thisInStatics.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/thisInStatics.ts (1 errors) ====
-    class C {
-        static f() {
-            var y/*1*/ = this;
-        }
-    
-        static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var y/*2*/ = this;
-            return y;
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/thisInStatics.symbols b/tests/baselines/reference/thisInStatics.symbols
new file mode 100644
index 0000000000000..8cdbc159487dd
--- /dev/null
+++ b/tests/baselines/reference/thisInStatics.symbols
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/thisInStatics.ts ===
+class C {
+>C : Symbol(C, Decl(thisInStatics.ts, 0, 0))
+
+    static f() {
+>f : Symbol(C.f, Decl(thisInStatics.ts, 0, 9))
+
+        var y/*1*/ = this;
+>y : Symbol(y, Decl(thisInStatics.ts, 2, 11))
+>this : Symbol(C, Decl(thisInStatics.ts, 0, 0))
+    }
+
+    static get x() {
+>x : Symbol(C.x, Decl(thisInStatics.ts, 3, 5))
+
+        var y/*2*/ = this;
+>y : Symbol(y, Decl(thisInStatics.ts, 6, 11))
+>this : Symbol(C, Decl(thisInStatics.ts, 0, 0))
+
+        return y;
+>y : Symbol(y, Decl(thisInStatics.ts, 6, 11))
+    }
+}
diff --git a/tests/baselines/reference/thisInStatics.types b/tests/baselines/reference/thisInStatics.types
new file mode 100644
index 0000000000000..2c059c9af23da
--- /dev/null
+++ b/tests/baselines/reference/thisInStatics.types
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/thisInStatics.ts ===
+class C {
+>C : C
+
+    static f() {
+>f : () => void
+
+        var y/*1*/ = this;
+>y : typeof C
+>this : typeof C
+    }
+
+    static get x() {
+>x : typeof C
+
+        var y/*2*/ = this;
+>y : typeof C
+>this : typeof C
+
+        return y;
+>y : typeof C
+    }
+}
diff --git a/tests/baselines/reference/this_inside-object-literal-getters-and-setters.errors.txt b/tests/baselines/reference/this_inside-object-literal-getters-and-setters.errors.txt
deleted file mode 100644
index 456d264a12f9d..0000000000000
--- a/tests/baselines/reference/this_inside-object-literal-getters-and-setters.errors.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-tests/cases/compiler/this_inside-object-literal-getters-and-setters.ts(4,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/this_inside-object-literal-getters-and-setters.ts(7,13): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/this_inside-object-literal-getters-and-setters.ts (2 errors) ====
-    module ObjectLiteral {
-        var ThisInObjectLiteral = {
-            _foo: '1',
-            get foo(): string {
-                ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                return this._foo;
-            },
-            set foo(value: string) {
-                ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                this._foo = value;
-            },
-            test: function () {
-                return this._foo;
-            }
-        }
-    }
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/this_inside-object-literal-getters-and-setters.symbols b/tests/baselines/reference/this_inside-object-literal-getters-and-setters.symbols
new file mode 100644
index 0000000000000..aa05f59389afb
--- /dev/null
+++ b/tests/baselines/reference/this_inside-object-literal-getters-and-setters.symbols
@@ -0,0 +1,32 @@
+=== tests/cases/compiler/this_inside-object-literal-getters-and-setters.ts ===
+module ObjectLiteral {
+>ObjectLiteral : Symbol(ObjectLiteral, Decl(this_inside-object-literal-getters-and-setters.ts, 0, 0))
+
+    var ThisInObjectLiteral = {
+>ThisInObjectLiteral : Symbol(ThisInObjectLiteral, Decl(this_inside-object-literal-getters-and-setters.ts, 1, 7))
+
+        _foo: '1',
+>_foo : Symbol(_foo, Decl(this_inside-object-literal-getters-and-setters.ts, 1, 31))
+
+        get foo(): string {
+>foo : Symbol(foo, Decl(this_inside-object-literal-getters-and-setters.ts, 2, 18), Decl(this_inside-object-literal-getters-and-setters.ts, 5, 10))
+
+            return this._foo;
+        },
+        set foo(value: string) {
+>foo : Symbol(foo, Decl(this_inside-object-literal-getters-and-setters.ts, 2, 18), Decl(this_inside-object-literal-getters-and-setters.ts, 5, 10))
+>value : Symbol(value, Decl(this_inside-object-literal-getters-and-setters.ts, 6, 16))
+
+            this._foo = value;
+>value : Symbol(value, Decl(this_inside-object-literal-getters-and-setters.ts, 6, 16))
+
+        },
+        test: function () {
+>test : Symbol(test, Decl(this_inside-object-literal-getters-and-setters.ts, 8, 10))
+
+            return this._foo;
+        }
+    }
+}
+
+
diff --git a/tests/baselines/reference/this_inside-object-literal-getters-and-setters.types b/tests/baselines/reference/this_inside-object-literal-getters-and-setters.types
new file mode 100644
index 0000000000000..1c1238d770ff0
--- /dev/null
+++ b/tests/baselines/reference/this_inside-object-literal-getters-and-setters.types
@@ -0,0 +1,46 @@
+=== tests/cases/compiler/this_inside-object-literal-getters-and-setters.ts ===
+module ObjectLiteral {
+>ObjectLiteral : typeof ObjectLiteral
+
+    var ThisInObjectLiteral = {
+>ThisInObjectLiteral : { _foo: string; foo: string; test: () => any; }
+>{        _foo: '1',        get foo(): string {            return this._foo;        },        set foo(value: string) {            this._foo = value;        },        test: function () {            return this._foo;        }    } : { _foo: string; foo: string; test: () => any; }
+
+        _foo: '1',
+>_foo : string
+>'1' : "1"
+
+        get foo(): string {
+>foo : string
+
+            return this._foo;
+>this._foo : any
+>this : any
+>_foo : any
+
+        },
+        set foo(value: string) {
+>foo : string
+>value : string
+
+            this._foo = value;
+>this._foo = value : string
+>this._foo : any
+>this : any
+>_foo : any
+>value : string
+
+        },
+        test: function () {
+>test : () => any
+>function () {            return this._foo;        } : () => any
+
+            return this._foo;
+>this._foo : any
+>this : any
+>_foo : any
+        }
+    }
+}
+
+
diff --git a/tests/baselines/reference/topLevelAmbientModule.js b/tests/baselines/reference/topLevelAmbientModule.js
index 3e162170c87a1..bbe5ad74aae27 100644
--- a/tests/baselines/reference/topLevelAmbientModule.js
+++ b/tests/baselines/reference/topLevelAmbientModule.js
@@ -14,7 +14,7 @@ var z = foo.x + 10;
 //// [foo_0.js]
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="foo_0.ts"/>
 var foo = require("foo");
 var z = foo.x + 10;
diff --git a/tests/baselines/reference/topLevelExports.js b/tests/baselines/reference/topLevelExports.js
index 5f58c44d2f262..c293bcf64c854 100644
--- a/tests/baselines/reference/topLevelExports.js
+++ b/tests/baselines/reference/topLevelExports.js
@@ -8,7 +8,7 @@ void log(foo).toString();
 //// [topLevelExports.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.foo = 3;
     function log(n) { return n; }
     void log(exports.foo).toString();
diff --git a/tests/baselines/reference/topLevelFileModule.js b/tests/baselines/reference/topLevelFileModule.js
index 8ff74cc89f48e..278624ed22ac2 100644
--- a/tests/baselines/reference/topLevelFileModule.js
+++ b/tests/baselines/reference/topLevelFileModule.js
@@ -14,10 +14,10 @@ var z = foo.x + fum.y;
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("./vs/foo_0");
 var fum = require("./vs/fum");
 var z = foo.x + fum.y;
diff --git a/tests/baselines/reference/topLevelFileModuleMissing.js b/tests/baselines/reference/topLevelFileModuleMissing.js
index 37d9ac5b1506a..0378ec6cdc4ef 100644
--- a/tests/baselines/reference/topLevelFileModuleMissing.js
+++ b/tests/baselines/reference/topLevelFileModuleMissing.js
@@ -10,6 +10,6 @@ var z = foo.x + 10;
 
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("vs/foo");
 var z = foo.x + 10;
diff --git a/tests/baselines/reference/topLevelLambda4.js b/tests/baselines/reference/topLevelLambda4.js
index 5ccfb91bec7ae..67c15dbb9b4fd 100644
--- a/tests/baselines/reference/topLevelLambda4.js
+++ b/tests/baselines/reference/topLevelLambda4.js
@@ -5,6 +5,6 @@ export var x = () => this.window;
 define(["require", "exports"], function (require, exports) {
     "use strict";
     var _this = this;
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     exports.x = function () { return _this.window; };
 });
diff --git a/tests/baselines/reference/topLevelModuleDeclarationAndFile.js b/tests/baselines/reference/topLevelModuleDeclarationAndFile.js
index 8f4ecb37d3112..0d221cb723adb 100644
--- a/tests/baselines/reference/topLevelModuleDeclarationAndFile.js
+++ b/tests/baselines/reference/topLevelModuleDeclarationAndFile.js
@@ -19,7 +19,7 @@ var z2 = foo.y() + 10; // Should resolve
 //// [foo_1.js]
 //// [foo_2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="foo_1.ts"/>
 var foo = require("vs/foo_0");
 var z1 = foo.x + 10; // Should error, as declaration should win
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js
index e9493d9d5917d..61215bc876f57 100644
--- a/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js	
+++ b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js	
@@ -1,3 +1,3 @@
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Rename dependencies - AMD.js b/tests/baselines/reference/transpile/Rename dependencies - AMD.js
index c5ffb86a1aa34..5874219d5bdda 100644
--- a/tests/baselines/reference/transpile/Rename dependencies - AMD.js	
+++ b/tests/baselines/reference/transpile/Rename dependencies - AMD.js	
@@ -1,6 +1,6 @@
 define(["require", "exports", "SomeOtherName"], function (require, exports, SomeName_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     use(SomeName_1.foo);
 });
 //# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Rename dependencies - UMD.js b/tests/baselines/reference/transpile/Rename dependencies - UMD.js
index 0ecfbce239727..d8b8cf43986f2 100644
--- a/tests/baselines/reference/transpile/Rename dependencies - UMD.js	
+++ b/tests/baselines/reference/transpile/Rename dependencies - UMD.js	
@@ -8,7 +8,7 @@
     }
 })(function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var SomeName_1 = require("SomeOtherName");
     use(SomeName_1.foo);
 });
diff --git a/tests/baselines/reference/tsxAttributeResolution10.js b/tests/baselines/reference/tsxAttributeResolution10.js
index 141743c17bc20..1fc424cce149c 100644
--- a/tests/baselines/reference/tsxAttributeResolution10.js
+++ b/tests/baselines/reference/tsxAttributeResolution10.js
@@ -33,7 +33,7 @@ export class MyComponent {
 //// [file.jsx]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var MyComponent = (function () {
         function MyComponent() {
         }
diff --git a/tests/baselines/reference/tsxAttributeResolution15.js b/tests/baselines/reference/tsxAttributeResolution15.js
index 0fbc01e6e0fce..e587f4c79dcff 100644
--- a/tests/baselines/reference/tsxAttributeResolution15.js
+++ b/tests/baselines/reference/tsxAttributeResolution15.js
@@ -28,7 +28,7 @@ var __extends = (this && this.__extends) || (function () {
     };
 })();
 var _this = this;
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var BigGreeter = (function (_super) {
     __extends(BigGreeter, _super);
diff --git a/tests/baselines/reference/tsxAttributeResolution16.js b/tests/baselines/reference/tsxAttributeResolution16.js
index 1c05446b4938e..57e92d8378436 100644
--- a/tests/baselines/reference/tsxAttributeResolution16.js
+++ b/tests/baselines/reference/tsxAttributeResolution16.js
@@ -36,7 +36,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var AddressComp = (function (_super) {
     __extends(AddressComp, _super);
diff --git a/tests/baselines/reference/tsxAttributeResolution9.js b/tests/baselines/reference/tsxAttributeResolution9.js
index a982fea412b1e..04735e4c581a2 100644
--- a/tests/baselines/reference/tsxAttributeResolution9.js
+++ b/tests/baselines/reference/tsxAttributeResolution9.js
@@ -29,7 +29,7 @@ export class MyComponent {
 //// [file.jsx]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var MyComponent = (function () {
         function MyComponent() {
         }
diff --git a/tests/baselines/reference/tsxCorrectlyParseLessThanComparison1.js b/tests/baselines/reference/tsxCorrectlyParseLessThanComparison1.js
index f6403804fae29..807c45a1b95dd 100644
--- a/tests/baselines/reference/tsxCorrectlyParseLessThanComparison1.js
+++ b/tests/baselines/reference/tsxCorrectlyParseLessThanComparison1.js
@@ -31,7 +31,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ShortDetails = (function (_super) {
     __extends(ShortDetails, _super);
     function ShortDetails() {
diff --git a/tests/baselines/reference/tsxDefaultAttributesResolution1.js b/tests/baselines/reference/tsxDefaultAttributesResolution1.js
index 8d22db3b69f13..29cf189cd0e3a 100644
--- a/tests/baselines/reference/tsxDefaultAttributesResolution1.js
+++ b/tests/baselines/reference/tsxDefaultAttributesResolution1.js
@@ -25,7 +25,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxDefaultAttributesResolution2.js b/tests/baselines/reference/tsxDefaultAttributesResolution2.js
index 38735169f10a3..74e6660b3f278 100644
--- a/tests/baselines/reference/tsxDefaultAttributesResolution2.js
+++ b/tests/baselines/reference/tsxDefaultAttributesResolution2.js
@@ -25,7 +25,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxDefaultAttributesResolution3.js b/tests/baselines/reference/tsxDefaultAttributesResolution3.js
index 14da51516b578..483fbfda921bb 100644
--- a/tests/baselines/reference/tsxDefaultAttributesResolution3.js
+++ b/tests/baselines/reference/tsxDefaultAttributesResolution3.js
@@ -25,7 +25,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxDefaultImports.js b/tests/baselines/reference/tsxDefaultImports.js
index a6c1a4217a3ac..8e457196a3662 100644
--- a/tests/baselines/reference/tsxDefaultImports.js
+++ b/tests/baselines/reference/tsxDefaultImports.js
@@ -15,7 +15,7 @@ let a = Def.E.one;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var SomeEnum;
 (function (SomeEnum) {
     SomeEnum[SomeEnum["one"] = 0] = "one";
@@ -26,9 +26,9 @@ var SomeClass = (function () {
     return SomeClass;
 }());
 SomeClass.E = SomeEnum;
-exports["default"] = SomeClass;
+exports.default = SomeClass;
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var a_1 = require("./a");
-var a = a_1["default"].E.one;
+var a = a_1.default.E.one;
diff --git a/tests/baselines/reference/tsxDynamicTagName5.js b/tests/baselines/reference/tsxDynamicTagName5.js
index 1aa3650a9632d..4f9eaec472d36 100644
--- a/tests/baselines/reference/tsxDynamicTagName5.js
+++ b/tests/baselines/reference/tsxDynamicTagName5.js
@@ -30,7 +30,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Text = (function (_super) {
     __extends(Text, _super);
diff --git a/tests/baselines/reference/tsxDynamicTagName7.js b/tests/baselines/reference/tsxDynamicTagName7.js
index 1bfade5d5da29..37b2031cb9727 100644
--- a/tests/baselines/reference/tsxDynamicTagName7.js
+++ b/tests/baselines/reference/tsxDynamicTagName7.js
@@ -30,7 +30,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Text = (function (_super) {
     __extends(Text, _super);
diff --git a/tests/baselines/reference/tsxDynamicTagName8.js b/tests/baselines/reference/tsxDynamicTagName8.js
index 34a587c7d19b3..1569219094cdc 100644
--- a/tests/baselines/reference/tsxDynamicTagName8.js
+++ b/tests/baselines/reference/tsxDynamicTagName8.js
@@ -30,7 +30,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Text = (function (_super) {
     __extends(Text, _super);
diff --git a/tests/baselines/reference/tsxDynamicTagName9.js b/tests/baselines/reference/tsxDynamicTagName9.js
index e5229f97a39da..1228340501d83 100644
--- a/tests/baselines/reference/tsxDynamicTagName9.js
+++ b/tests/baselines/reference/tsxDynamicTagName9.js
@@ -30,7 +30,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Text = (function (_super) {
     __extends(Text, _super);
diff --git a/tests/baselines/reference/tsxElementResolution17.js b/tests/baselines/reference/tsxElementResolution17.js
index 1f61a441d66b9..b319f3f6f928d 100644
--- a/tests/baselines/reference/tsxElementResolution17.js
+++ b/tests/baselines/reference/tsxElementResolution17.js
@@ -30,6 +30,6 @@ import s2 = require('elements2');
 //// [consumer.jsx]
 define(["require", "exports", "elements1"], function (require, exports, s1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     <s1.MyElement />;
 });
diff --git a/tests/baselines/reference/tsxElementResolution19.js b/tests/baselines/reference/tsxElementResolution19.js
index d63ab29794d2d..eb0bab62e5a72 100644
--- a/tests/baselines/reference/tsxElementResolution19.js
+++ b/tests/baselines/reference/tsxElementResolution19.js
@@ -22,7 +22,7 @@ import {MyClass} from './file1';
 //// [file1.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var MyClass = (function () {
         function MyClass() {
         }
@@ -33,6 +33,6 @@ define(["require", "exports"], function (require, exports) {
 //// [file2.js]
 define(["require", "exports", "react", "./file1"], function (require, exports, React, file1_1) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     React.createElement(file1_1.MyClass, null);
 });
diff --git a/tests/baselines/reference/tsxExternalModuleEmit1.js b/tests/baselines/reference/tsxExternalModuleEmit1.js
index 578d952be983d..12f6a3a01f826 100644
--- a/tests/baselines/reference/tsxExternalModuleEmit1.js
+++ b/tests/baselines/reference/tsxExternalModuleEmit1.js
@@ -42,7 +42,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Button = (function (_super) {
     __extends(Button, _super);
@@ -67,7 +67,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 // Should see var button_1 = require('./button') here
 var button_1 = require("./button");
diff --git a/tests/baselines/reference/tsxExternalModuleEmit2.js b/tests/baselines/reference/tsxExternalModuleEmit2.js
index adf5ed2aaa633..fb7e6a6953083 100644
--- a/tests/baselines/reference/tsxExternalModuleEmit2.js
+++ b/tests/baselines/reference/tsxExternalModuleEmit2.js
@@ -26,9 +26,9 @@ var __assign = (this && this.__assign) || Object.assign || function(t) {
     }
     return t;
 };
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var mod_1 = require("mod");
 // Should see mod_1['default'] in emit here
-React.createElement(Foo, { handler: mod_1["default"] });
+React.createElement(Foo, { handler: mod_1.default });
 // Should see mod_1['default'] in emit here
-React.createElement(Foo, __assign({}, mod_1["default"]));
+React.createElement(Foo, __assign({}, mod_1.default));
diff --git a/tests/baselines/reference/tsxPreserveEmit3.js b/tests/baselines/reference/tsxPreserveEmit3.js
index d886d4169b817..36d662362d99d 100644
--- a/tests/baselines/reference/tsxPreserveEmit3.js
+++ b/tests/baselines/reference/tsxPreserveEmit3.js
@@ -20,5 +20,5 @@ import {React} from "./test";
 //// [react-consumer.jsx]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter1.js b/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter1.js
index 3bd876dbc3622..a722ec279e583 100644
--- a/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter1.js
+++ b/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter1.js
@@ -14,6 +14,6 @@ let x = <MyComp a={10} b="hi" />
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var x = <MyComp a={10} b="hi"/>;
diff --git a/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter2.js b/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter2.js
index 469adbee4b702..2935d8e462285 100644
--- a/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter2.js
+++ b/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter2.js
@@ -16,7 +16,7 @@ let x1 = <MyComp a="hi"/>
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 // Error
 var x = <MyComp />;
diff --git a/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter3.js b/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter3.js
index 3eed9e5fb175a..5fea4784444b7 100644
--- a/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter3.js
+++ b/tests/baselines/reference/tsxReactComponentWithDefaultTypeParameter3.js
@@ -19,7 +19,7 @@ let x2 = <MyComp a="hi"/>
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 // OK: we fille in missing type argument with empty object
 var x1 = <MyComp />;
diff --git a/tests/baselines/reference/tsxReactEmit5.js b/tests/baselines/reference/tsxReactEmit5.js
index de1e2bf30e22f..e30c5ef894ca4 100644
--- a/tests/baselines/reference/tsxReactEmit5.js
+++ b/tests/baselines/reference/tsxReactEmit5.js
@@ -30,7 +30,7 @@ var __assign = (this && this.__assign) || Object.assign || function(t) {
     }
     return t;
 };
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var test_1 = require("./test");
 // Should emit test_1.React.createElement
 //  and React.__spread
diff --git a/tests/baselines/reference/tsxReactEmitNesting.js b/tests/baselines/reference/tsxReactEmitNesting.js
index 5e1f7db39c355..35d678a1e4e45 100644
--- a/tests/baselines/reference/tsxReactEmitNesting.js
+++ b/tests/baselines/reference/tsxReactEmitNesting.js
@@ -37,21 +37,21 @@ let render = (ctrl, model) =>
 //// [file.js]
 // A simple render function with nesting and control statements
 var render = function (ctrl, model) {
-    return vdom.createElement("section", { "class": "todoapp" },
-        vdom.createElement("header", { "class": "header" },
+    return vdom.createElement("section", { class: "todoapp" },
+        vdom.createElement("header", { class: "header" },
             vdom.createElement("h1", null, "todos <x>"),
-            vdom.createElement("input", { "class": "new-todo", autofocus: true, autocomplete: "off", placeholder: "What needs to be done?", value: model.newTodo, onKeyup: ctrl.addTodo.bind(ctrl, model) })),
-        vdom.createElement("section", { "class": "main", style: { display: (model.todos && model.todos.length) ? "block" : "none" } },
-            vdom.createElement("input", { "class": "toggle-all", type: "checkbox", onChange: ctrl.toggleAll.bind(ctrl) }),
-            vdom.createElement("ul", { "class": "todo-list" }, model.filteredTodos.map(function (todo) {
-                return vdom.createElement("li", { "class": { todo: true, completed: todo.completed, editing: todo == model.editedTodo } },
-                    vdom.createElement("div", { "class": "view" },
+            vdom.createElement("input", { class: "new-todo", autofocus: true, autocomplete: "off", placeholder: "What needs to be done?", value: model.newTodo, onKeyup: ctrl.addTodo.bind(ctrl, model) })),
+        vdom.createElement("section", { class: "main", style: { display: (model.todos && model.todos.length) ? "block" : "none" } },
+            vdom.createElement("input", { class: "toggle-all", type: "checkbox", onChange: ctrl.toggleAll.bind(ctrl) }),
+            vdom.createElement("ul", { class: "todo-list" }, model.filteredTodos.map(function (todo) {
+                return vdom.createElement("li", { class: { todo: true, completed: todo.completed, editing: todo == model.editedTodo } },
+                    vdom.createElement("div", { class: "view" },
                         (!todo.editable) ?
-                            vdom.createElement("input", { "class": "toggle", type: "checkbox" })
+                            vdom.createElement("input", { class: "toggle", type: "checkbox" })
                             : null,
                         vdom.createElement("label", { onDoubleClick: function () { ctrl.editTodo(todo); } }, todo.title),
-                        vdom.createElement("button", { "class": "destroy", onClick: ctrl.removeTodo.bind(ctrl, todo) }),
-                        vdom.createElement("div", { "class": "iconBorder" },
-                            vdom.createElement("div", { "class": "icon" }))));
+                        vdom.createElement("button", { class: "destroy", onClick: ctrl.removeTodo.bind(ctrl, todo) }),
+                        vdom.createElement("div", { class: "iconBorder" },
+                            vdom.createElement("div", { class: "icon" }))));
             }))));
 };
diff --git a/tests/baselines/reference/tsxSfcReturnNull.js b/tests/baselines/reference/tsxSfcReturnNull.js
index 793342be96a20..653fddb95682f 100644
--- a/tests/baselines/reference/tsxSfcReturnNull.js
+++ b/tests/baselines/reference/tsxSfcReturnNull.js
@@ -13,7 +13,7 @@ const G = <Greet />;
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = function (props) { return null; };
     function Greet(x) {
         return null;
diff --git a/tests/baselines/reference/tsxSfcReturnNullStrictNullChecks.js b/tests/baselines/reference/tsxSfcReturnNullStrictNullChecks.js
index 793342be96a20..653fddb95682f 100644
--- a/tests/baselines/reference/tsxSfcReturnNullStrictNullChecks.js
+++ b/tests/baselines/reference/tsxSfcReturnNullStrictNullChecks.js
@@ -13,7 +13,7 @@ const G = <Greet />;
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = function (props) { return null; };
     function Greet(x) {
         return null;
diff --git a/tests/baselines/reference/tsxSfcReturnUndefinedStrictNullChecks.js b/tests/baselines/reference/tsxSfcReturnUndefinedStrictNullChecks.js
index 5d3825db91c55..df858baad853c 100644
--- a/tests/baselines/reference/tsxSfcReturnUndefinedStrictNullChecks.js
+++ b/tests/baselines/reference/tsxSfcReturnUndefinedStrictNullChecks.js
@@ -13,7 +13,7 @@ const G = <Greet />;
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = function (props) { return undefined; };
     function Greet(x) {
         return undefined;
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution1.js b/tests/baselines/reference/tsxSpreadAttributesResolution1.js
index f8c3cfbb5946d..34e2111bfd1f9 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution1.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution1.js
@@ -25,7 +25,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution10.js b/tests/baselines/reference/tsxSpreadAttributesResolution10.js
index f8d56f608de9f..9ec9d6f004c97 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution10.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution10.js
@@ -35,7 +35,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Opt = (function (_super) {
     __extends(Opt, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution11.js b/tests/baselines/reference/tsxSpreadAttributesResolution11.js
index 44e2dcd529211..47b422b5b91fd 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution11.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution11.js
@@ -43,7 +43,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var obj = {};
 var obj1 = {
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution12.js b/tests/baselines/reference/tsxSpreadAttributesResolution12.js
index a68755a7592d2..a59c88fe49c21 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution12.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution12.js
@@ -44,7 +44,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var obj = {};
 var obj1 = {
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution13.js b/tests/baselines/reference/tsxSpreadAttributesResolution13.js
index 8227f3d6399af..bcbd0f24d90c3 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution13.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution13.js
@@ -30,7 +30,7 @@ function ChildComponent({ property1 }: AnotherComponentProps) {
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function Component(props) {
     var condition1;
@@ -41,7 +41,7 @@ function Component(props) {
         return (<ChildComponent {...props} property1="NewString"/>);
     }
 }
-exports["default"] = Component;
+exports.default = Component;
 function ChildComponent(_a) {
     var property1 = _a.property1;
     return (<span>{property1}</span>);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution14.js b/tests/baselines/reference/tsxSpreadAttributesResolution14.js
index d04c9cd6d9921..c4b1c30e1858b 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution14.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution14.js
@@ -25,14 +25,14 @@ function AnotherComponent({ property1 }: AnotherComponentProps) {
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function Component(props) {
     return (
     // Error extra property
     <AnotherComponent {...props} Property1/>);
 }
-exports["default"] = Component;
+exports.default = Component;
 function AnotherComponent(_a) {
     var property1 = _a.property1;
     return (<span>{property1}</span>);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution15.js b/tests/baselines/reference/tsxSpreadAttributesResolution15.js
index 41302f22a61bf..2608c39c53054 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution15.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution15.js
@@ -26,12 +26,12 @@ function AnotherComponent({ property1 }: AnotherComponentProps) {
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function Component(props) {
     return (<AnotherComponent {...props} property2 AnotherProperty1="hi"/>);
 }
-exports["default"] = Component;
+exports.default = Component;
 function AnotherComponent(_a) {
     var property1 = _a.property1;
     return (<span>{property1}</span>);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution16.js b/tests/baselines/reference/tsxSpreadAttributesResolution16.js
index ad0d4b0188574..76d698626c796 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution16.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution16.js
@@ -27,14 +27,14 @@ function AnotherComponent({ property1 }: AnotherComponentProps) {
 
 //// [file.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function Component(props) {
     return (
     // Error: missing property
     <AnotherComponent {...props}/>);
 }
-exports["default"] = Component;
+exports.default = Component;
 function AnotherComponent(_a) {
     var property1 = _a.property1;
     return (<span>{property1}</span>);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution2.js b/tests/baselines/reference/tsxSpreadAttributesResolution2.js
index ad2af27548582..6af79e1e72393 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution2.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution2.js
@@ -33,7 +33,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution3.js b/tests/baselines/reference/tsxSpreadAttributesResolution3.js
index e2e0f38da0d51..7bb44d6f4cc93 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution3.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution3.js
@@ -33,7 +33,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution4.js b/tests/baselines/reference/tsxSpreadAttributesResolution4.js
index 3ac18a7c21931..adf957b190f51 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution4.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution4.js
@@ -47,7 +47,7 @@ var __extends = (this && this.__extends) || (function () {
     };
 })();
 var _this = this;
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution5.js b/tests/baselines/reference/tsxSpreadAttributesResolution5.js
index 192f4b78770bd..01e932e7bb3f6 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution5.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution5.js
@@ -45,7 +45,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Poisoned = (function (_super) {
     __extends(Poisoned, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution6.js b/tests/baselines/reference/tsxSpreadAttributesResolution6.js
index e6d714a670507..5c1a0739782ee 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution6.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution6.js
@@ -29,7 +29,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var TextComponent = (function (_super) {
     __extends(TextComponent, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution7.js b/tests/baselines/reference/tsxSpreadAttributesResolution7.js
index d93e2e80a9242..2492e5125c455 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution7.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution7.js
@@ -36,7 +36,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var TextComponent = (function (_super) {
     __extends(TextComponent, _super);
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution8.js b/tests/baselines/reference/tsxSpreadAttributesResolution8.js
index 9b07fa5e903bc..9aa149d38ba85 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution8.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution8.js
@@ -38,7 +38,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var obj = {};
 var obj1 = {
diff --git a/tests/baselines/reference/tsxSpreadAttributesResolution9.js b/tests/baselines/reference/tsxSpreadAttributesResolution9.js
index c7379ab2db1d9..9f9d0c7079665 100644
--- a/tests/baselines/reference/tsxSpreadAttributesResolution9.js
+++ b/tests/baselines/reference/tsxSpreadAttributesResolution9.js
@@ -36,7 +36,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var Opt = (function (_super) {
     __extends(Opt, _super);
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentOverload1.js b/tests/baselines/reference/tsxStatelessFunctionComponentOverload1.js
index 09eb20c755fd0..37efe9c67c229 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentOverload1.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentOverload1.js
@@ -45,7 +45,7 @@ const e6 = <TestingOptional y1 y3 y2={10} />
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // OK
     var c1 = <OneThing yxx='ok'/>;
     var c2 = <OneThing yy={100} yy1="hello"/>;
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.js b/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.js
index 2c940ebc820c3..5bb8b7a1e46b1 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentOverload2.js
@@ -35,7 +35,7 @@ const c10 = <OneThing {...obj2} yy1="boo" />;
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var obj = {
         yy: 10,
         yy1: "hello"
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentOverload4.js b/tests/baselines/reference/tsxStatelessFunctionComponentOverload4.js
index d67466d127195..5fb1b9856488f 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentOverload4.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentOverload4.js
@@ -40,7 +40,7 @@ const e4 = <TestingOptional y1="hello" y2={1000}>Hi</TestingOptional>
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var obj = {
         yy: 10,
         yy1: "hello"
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentOverload5.js b/tests/baselines/reference/tsxStatelessFunctionComponentOverload5.js
index 1f13591dd5fc8..c64e0fc9a3867 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentOverload5.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentOverload5.js
@@ -59,7 +59,7 @@ const b8 = <MainButton data-format />;  // incorrect type for specified hyphanat
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var obj0 = {
         to: "world"
     };
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentOverload6.js b/tests/baselines/reference/tsxStatelessFunctionComponentOverload6.js
index c1ec4ccd0bf7a..d675a03037b77 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentOverload6.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentOverload6.js
@@ -60,7 +60,7 @@ const b12 = <MainButton data-format="Hello world" />
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var obj = {
         children: "hi",
         to: "boo"
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter1.js b/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter1.js
index 95957dcd36507..b9b87527937d9 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter1.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter1.js
@@ -16,7 +16,7 @@ let i1 = <MyComponent values="Hello"/>;
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function MyComponent(attr) {
         return <div>attr.values</div>;
     }
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter2.js b/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter2.js
index b418948a291a3..7768df3444a6d 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter2.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentWithDefaultTypeParameter2.js
@@ -16,7 +16,7 @@ let i1 = <MyComponent1 values={5}/>;
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function MyComponent1(attr) {
         return <div>attr.values</div>;
     }
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponents2.js b/tests/baselines/reference/tsxStatelessFunctionComponents2.js
index 90112ef1f139a..ac7eb68a16d33 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponents2.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponents2.js
@@ -49,7 +49,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function Greet(x) {
     return <div>Hello, {x}</div>;
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponents3.js b/tests/baselines/reference/tsxStatelessFunctionComponents3.js
index e7bfc98022939..862d630a125ea 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponents3.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponents3.js
@@ -20,7 +20,7 @@ var App: React.StatelessComponent<{ children }> = ({children}) => (
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var Foo = function (props) { return <div />; };
     // Should be OK
     var foo = <Foo />;
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.js b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.js
index 98fc80bfefea6..ba0cf8a24c68a 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments1.js
@@ -33,7 +33,7 @@ let i = <InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val) => { }}
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // OK
     function Baz(key1, value) {
         var a0 = <ComponentWithTwoAttributes key1={key1} value={value}/>;
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.js b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.js
index a357c808c026b..b6209a572510b 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments2.js
@@ -35,7 +35,7 @@ let i = <InferParamComponent values={[1, 2, 3, 4]} selectHandler={(val: string)
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // Error
     function Bar(arg) {
         var a1 = <ComponentSpecific1 {...arg} ignore-prop={10}/>;
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments3.js b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments3.js
index 7f3a8e38e8d7e..d9934ae8261b6 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments3.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments3.js
@@ -26,7 +26,7 @@ function createLink(func: (a: number)=>void) {
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // OK
     function Baz(arg1, arg2) {
         var a0 = <OverloadComponent {...arg1} a="hello" ignore-prop/>;
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments4.js b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments4.js
index c6692edf2f25f..7b9910223af80 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments4.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments4.js
@@ -14,7 +14,7 @@ function Baz<T extends {b: number}, U extends {a: boolean, b:string}>(arg1: T, a
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     // Error
     function Baz(arg1, arg2) {
         var a0 = <OverloadComponent a={arg1.b}/>;
diff --git a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments5.js b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments5.js
index 7e3c8bf35d20d..581d2b0ab37de 100644
--- a/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments5.js
+++ b/tests/baselines/reference/tsxStatelessFunctionComponentsWithTypeArguments5.js
@@ -21,7 +21,7 @@ function Bar<T extends { prop: number }>(arg: T) {
 //// [file.jsx]
 define(["require", "exports", "react"], function (require, exports, React) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function createComponent(arg) {
         var a1 = <Component {...arg}/>;
         var a2 = <Component {...arg} prop1/>;
diff --git a/tests/baselines/reference/tsxUnionElementType1.js b/tests/baselines/reference/tsxUnionElementType1.js
index b377bcb5670c4..da51151cb3307 100644
--- a/tests/baselines/reference/tsxUnionElementType1.js
+++ b/tests/baselines/reference/tsxUnionElementType1.js
@@ -14,7 +14,7 @@ var SFCComp = SFC1 || SFC2;
 
 //// [file.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function SFC1(prop) {
     return React.createElement("div", null, "hello");
diff --git a/tests/baselines/reference/tsxUnionElementType2.js b/tests/baselines/reference/tsxUnionElementType2.js
index c33c24f0d739a..3839b8d377968 100644
--- a/tests/baselines/reference/tsxUnionElementType2.js
+++ b/tests/baselines/reference/tsxUnionElementType2.js
@@ -14,7 +14,7 @@ var SFCComp = SFC1 || SFC2;
 
 //// [file.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function SFC1(prop) {
     return React.createElement("div", null, "hello");
diff --git a/tests/baselines/reference/tsxUnionElementType3.js b/tests/baselines/reference/tsxUnionElementType3.js
index 7724c9aebae00..6a12ba0e21878 100644
--- a/tests/baselines/reference/tsxUnionElementType3.js
+++ b/tests/baselines/reference/tsxUnionElementType3.js
@@ -48,7 +48,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var RC1 = (function (_super) {
     __extends(RC1, _super);
diff --git a/tests/baselines/reference/tsxUnionElementType4.js b/tests/baselines/reference/tsxUnionElementType4.js
index c09dcb522002d..cce79854a2d34 100644
--- a/tests/baselines/reference/tsxUnionElementType4.js
+++ b/tests/baselines/reference/tsxUnionElementType4.js
@@ -47,7 +47,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var RC1 = (function (_super) {
     __extends(RC1, _super);
diff --git a/tests/baselines/reference/tsxUnionElementType5.js b/tests/baselines/reference/tsxUnionElementType5.js
index 7f6bf32a89cd1..5e7fec4c37a7c 100644
--- a/tests/baselines/reference/tsxUnionElementType5.js
+++ b/tests/baselines/reference/tsxUnionElementType5.js
@@ -22,7 +22,7 @@ let b = <SFC2AndEmptyComp x />
 
 //// [file.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function EmptySFC1() {
     return React.createElement("div", null, "hello");
diff --git a/tests/baselines/reference/tsxUnionElementType6.js b/tests/baselines/reference/tsxUnionElementType6.js
index 016df27ee9b23..5375c07c3939e 100644
--- a/tests/baselines/reference/tsxUnionElementType6.js
+++ b/tests/baselines/reference/tsxUnionElementType6.js
@@ -25,7 +25,7 @@ let d = <SFC2AndEmptyComp data-prop />;
 
 //// [file.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 function EmptySFC1() {
     return React.createElement("div", null, "Hi");
diff --git a/tests/baselines/reference/tsxUnionTypeComponent1.js b/tests/baselines/reference/tsxUnionTypeComponent1.js
index 7c5349cdc5f85..20f48e7af6292 100644
--- a/tests/baselines/reference/tsxUnionTypeComponent1.js
+++ b/tests/baselines/reference/tsxUnionTypeComponent1.js
@@ -35,7 +35,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var MyComponent = (function (_super) {
     __extends(MyComponent, _super);
diff --git a/tests/baselines/reference/tsxUnionTypeComponent2.js b/tests/baselines/reference/tsxUnionTypeComponent2.js
index 7d7026fc499b8..be60f4602a171 100644
--- a/tests/baselines/reference/tsxUnionTypeComponent2.js
+++ b/tests/baselines/reference/tsxUnionTypeComponent2.js
@@ -12,7 +12,7 @@ const X: Invalid1 = 1;
 
 //// [file.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 var X = 1;
 React.createElement(X, null);
diff --git a/tests/baselines/reference/twoAccessorsWithSameName2.errors.txt b/tests/baselines/reference/twoAccessorsWithSameName2.errors.txt
index 59c15d73d5e2c..f378739bd55a3 100644
--- a/tests/baselines/reference/twoAccessorsWithSameName2.errors.txt
+++ b/tests/baselines/reference/twoAccessorsWithSameName2.errors.txt
@@ -1,49 +1,31 @@
-tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(2,16): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(3,16): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(7,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(7,16): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(8,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(8,16): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(12,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts(15,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts (10 errors) ====
+==== tests/cases/conformance/classes/propertyMemberDeclarations/twoAccessorsWithSameName2.ts (4 errors) ====
     class C {
         static get x() { return 1; }
                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~
 !!! error TS2300: Duplicate identifier 'x'.
         static get x() { return 1; } // error
                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~
 !!! error TS2300: Duplicate identifier 'x'.
     }
     
     class D {
         static set x(v) {  }
                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~
 !!! error TS2300: Duplicate identifier 'x'.
         static set x(v) {  } // error
                    ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~
 !!! error TS2300: Duplicate identifier 'x'.
     }
     
     class E {
         static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return 1;
         }
         static set x(v) { }
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/typeCheckObjectCreationExpressionWithUndefinedCallResolutionData.js b/tests/baselines/reference/typeCheckObjectCreationExpressionWithUndefinedCallResolutionData.js
index df12050eaf613..51706b6c91de0 100644
--- a/tests/baselines/reference/typeCheckObjectCreationExpressionWithUndefinedCallResolutionData.js
+++ b/tests/baselines/reference/typeCheckObjectCreationExpressionWithUndefinedCallResolutionData.js
@@ -13,7 +13,7 @@ f.foo();
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() {
     var classes = undefined;
     return new classes(null);
@@ -21,7 +21,7 @@ function foo() {
 exports.foo = foo;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var f = require("./file1");
 f.foo();
 
diff --git a/tests/baselines/reference/typeGuardsAsAssertions.js b/tests/baselines/reference/typeGuardsAsAssertions.js
index 8c9b2048514aa..7256e9cce7c0a 100644
--- a/tests/baselines/reference/typeGuardsAsAssertions.js
+++ b/tests/baselines/reference/typeGuardsAsAssertions.js
@@ -124,7 +124,7 @@ function f6() {
 //// [typeGuardsAsAssertions.js]
 "use strict";
 // Repro from #8513
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var cond;
 exports.none = { none: '' };
 function isSome(value) {
diff --git a/tests/baselines/reference/typeGuardsInExternalModule.js b/tests/baselines/reference/typeGuardsInExternalModule.js
index 03f2d2cee8d51..e3ecd059646ba 100644
--- a/tests/baselines/reference/typeGuardsInExternalModule.js
+++ b/tests/baselines/reference/typeGuardsInExternalModule.js
@@ -27,7 +27,7 @@ else {
 "use strict";
 // Note that type guards affect types of variables and parameters only and 
 // have no effect on members of objects such as properties. 
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // local variable in external module
 var num;
 var var1;
diff --git a/tests/baselines/reference/typeInferenceLiteralUnion.js b/tests/baselines/reference/typeInferenceLiteralUnion.js
index 289dd4130460b..26e3fa4e2b4a7 100644
--- a/tests/baselines/reference/typeInferenceLiteralUnion.js
+++ b/tests/baselines/reference/typeInferenceLiteralUnion.js
@@ -38,7 +38,7 @@ extentMixed = extent([new NumCoercible(10), 13, '12', true]);
 
 //// [typeInferenceLiteralUnion.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // Not very useful, but meets Numeric
 var NumCoercible = (function () {
     function NumCoercible(a) {
diff --git a/tests/baselines/reference/typeOfThis.errors.txt b/tests/baselines/reference/typeOfThis.errors.txt
index 83d450570fce9..6e35e25784a8d 100644
--- a/tests/baselines/reference/typeOfThis.errors.txt
+++ b/tests/baselines/reference/typeOfThis.errors.txt
@@ -1,24 +1,16 @@
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(14,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 't' must be of type 'this', but here has type 'MyTestClass'.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(18,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'p' must be of type 'this', but here has type 'MyTestClass'.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(22,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(24,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'p' must be of type 'this', but here has type 'MyTestClass'.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(27,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(29,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'p' must be of type 'this', but here has type 'MyTestClass'.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(37,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 't' must be of type 'this', but here has type 'MyTestClass'.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(53,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(61,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(83,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 't' must be of type 'this', but here has type 'MyGenericTestClass<T, U>'.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(87,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'p' must be of type 'this', but here has type 'MyGenericTestClass<T, U>'.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(91,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(93,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'p' must be of type 'this', but here has type 'MyGenericTestClass<T, U>'.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(96,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(98,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'p' must be of type 'this', but here has type 'MyGenericTestClass<T, U>'.
 tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(106,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 't' must be of type 'this', but here has type 'MyGenericTestClass<T, U>'.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(122,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts (18 errors) ====
+==== tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts (10 errors) ====
     class MyTestClass {
         private canary: number;
         static staticCanary: number;
@@ -45,8 +37,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
     
         //type of 'this' in member accessor(get and set) body is the class instance type
         get prop() {
-            ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var p = this;
             var p: MyTestClass;
                 ~
@@ -54,8 +44,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
             return this;
         }
         set prop(v) {
-            ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var p = this;
             var p: MyTestClass;
                 ~
@@ -86,8 +74,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
         }
     
         static get staticProp() {
-                   ~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             //type of 'this' in static accessor body is constructor function type
             var p = this;
             var p: typeof MyTestClass;
@@ -96,8 +82,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
             return this;
         }
         static set staticProp(v: typeof MyTestClass) {
-                   ~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             //type of 'this' in static accessor body is constructor function type
             var p = this;
             var p: typeof MyTestClass;
@@ -132,8 +116,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
     
         //type of 'this' in member accessor(get and set) body is the class instance type
         get prop() {
-            ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var p = this;
             var p: MyGenericTestClass<T, U>;
                 ~
@@ -141,8 +123,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
             return this;
         }
         set prop(v) {
-            ~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             var p = this;
             var p: MyGenericTestClass<T, U>;
                 ~
@@ -173,8 +153,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
         }
     
         static get staticProp() {
-                   ~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             //type of 'this' in static accessor body is constructor function type
             var p = this;
             var p: typeof MyGenericTestClass;
@@ -183,8 +161,6 @@ tests/cases/conformance/expressions/thisKeyword/typeOfThis.ts(130,16): error TS1
             return this;
         }
         static set staticProp(v: typeof MyGenericTestClass) {
-                   ~~~~~~~~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             //type of 'this' in static accessor body is constructor function type
             var p = this;
             var p: typeof MyGenericTestClass;
diff --git a/tests/baselines/reference/typeOfThisInAccessor.errors.txt b/tests/baselines/reference/typeOfThisInAccessor.errors.txt
deleted file mode 100644
index aecc5cdeef57a..0000000000000
--- a/tests/baselines/reference/typeOfThisInAccessor.errors.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts(2,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts(7,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts(15,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts(20,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts(27,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts (5 errors) ====
-    class C {
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var r = this; // C
-            return 1;
-        }
-    
-        static get y() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var r2 = this; // typeof C
-            return 1;
-        }
-    }
-    
-    class D<T> {
-        a: T;
-        get x() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var r = this; // D<T>
-            return 1;
-        }
-    
-        static get y() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var r2 = this; // typeof D
-            return 1;
-        }
-    }
-    
-    var x = {
-        get a() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var r3 = this; // any
-            return 1;
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/typeOfThisInAccessor.symbols b/tests/baselines/reference/typeOfThisInAccessor.symbols
new file mode 100644
index 0000000000000..5981cc6d13e70
--- /dev/null
+++ b/tests/baselines/reference/typeOfThisInAccessor.symbols
@@ -0,0 +1,66 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts ===
+class C {
+>C : Symbol(C, Decl(typeOfThisInAccessor.ts, 0, 0))
+
+    get x() {
+>x : Symbol(C.x, Decl(typeOfThisInAccessor.ts, 0, 9))
+
+        var r = this; // C
+>r : Symbol(r, Decl(typeOfThisInAccessor.ts, 2, 11))
+>this : Symbol(C, Decl(typeOfThisInAccessor.ts, 0, 0))
+
+        return 1;
+    }
+
+    static get y() {
+>y : Symbol(C.y, Decl(typeOfThisInAccessor.ts, 4, 5))
+
+        var r2 = this; // typeof C
+>r2 : Symbol(r2, Decl(typeOfThisInAccessor.ts, 7, 11))
+>this : Symbol(C, Decl(typeOfThisInAccessor.ts, 0, 0))
+
+        return 1;
+    }
+}
+
+class D<T> {
+>D : Symbol(D, Decl(typeOfThisInAccessor.ts, 10, 1))
+>T : Symbol(T, Decl(typeOfThisInAccessor.ts, 12, 8))
+
+    a: T;
+>a : Symbol(D.a, Decl(typeOfThisInAccessor.ts, 12, 12))
+>T : Symbol(T, Decl(typeOfThisInAccessor.ts, 12, 8))
+
+    get x() {
+>x : Symbol(D.x, Decl(typeOfThisInAccessor.ts, 13, 9))
+
+        var r = this; // D<T>
+>r : Symbol(r, Decl(typeOfThisInAccessor.ts, 15, 11))
+>this : Symbol(D, Decl(typeOfThisInAccessor.ts, 10, 1))
+
+        return 1;
+    }
+
+    static get y() {
+>y : Symbol(D.y, Decl(typeOfThisInAccessor.ts, 17, 5))
+
+        var r2 = this; // typeof D
+>r2 : Symbol(r2, Decl(typeOfThisInAccessor.ts, 20, 11))
+>this : Symbol(D, Decl(typeOfThisInAccessor.ts, 10, 1))
+
+        return 1;
+    }
+}
+
+var x = {
+>x : Symbol(x, Decl(typeOfThisInAccessor.ts, 25, 3))
+
+    get a() {
+>a : Symbol(a, Decl(typeOfThisInAccessor.ts, 25, 9))
+
+        var r3 = this; // any
+>r3 : Symbol(r3, Decl(typeOfThisInAccessor.ts, 27, 11))
+
+        return 1;
+    }
+}
diff --git a/tests/baselines/reference/typeOfThisInAccessor.types b/tests/baselines/reference/typeOfThisInAccessor.types
new file mode 100644
index 0000000000000..7367ff2ad01b3
--- /dev/null
+++ b/tests/baselines/reference/typeOfThisInAccessor.types
@@ -0,0 +1,73 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/memberAccessorDeclarations/typeOfThisInAccessor.ts ===
+class C {
+>C : C
+
+    get x() {
+>x : number
+
+        var r = this; // C
+>r : this
+>this : this
+
+        return 1;
+>1 : 1
+    }
+
+    static get y() {
+>y : number
+
+        var r2 = this; // typeof C
+>r2 : typeof C
+>this : typeof C
+
+        return 1;
+>1 : 1
+    }
+}
+
+class D<T> {
+>D : D<T>
+>T : T
+
+    a: T;
+>a : T
+>T : T
+
+    get x() {
+>x : number
+
+        var r = this; // D<T>
+>r : this
+>this : this
+
+        return 1;
+>1 : 1
+    }
+
+    static get y() {
+>y : number
+
+        var r2 = this; // typeof D
+>r2 : typeof D
+>this : typeof D
+
+        return 1;
+>1 : 1
+    }
+}
+
+var x = {
+>x : { readonly a: number; }
+>{    get a() {        var r3 = this; // any        return 1;    }} : { readonly a: number; }
+
+    get a() {
+>a : number
+
+        var r3 = this; // any
+>r3 : any
+>this : any
+
+        return 1;
+>1 : 1
+    }
+}
diff --git a/tests/baselines/reference/typeOfThisInInstanceMember.errors.txt b/tests/baselines/reference/typeOfThisInInstanceMember.errors.txt
index 2685d2b34b8ae..8e690be1a4f80 100644
--- a/tests/baselines/reference/typeOfThisInInstanceMember.errors.txt
+++ b/tests/baselines/reference/typeOfThisInInstanceMember.errors.txt
@@ -1,8 +1,7 @@
 tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember.ts(10,11): error TS2339: Property 'z' does not exist on type 'C'.
-tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember.ts(14,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 
 
-==== tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember.ts (2 errors) ====
+==== tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember.ts (1 errors) ====
     class C {
         x = this;
         foo() {
@@ -19,8 +18,6 @@ tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInIns
         }
     
         get y() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
             return this;
         }
     }
diff --git a/tests/baselines/reference/typeOfThisInInstanceMember2.errors.txt b/tests/baselines/reference/typeOfThisInInstanceMember2.errors.txt
deleted file mode 100644
index 5544a80ee7dee..0000000000000
--- a/tests/baselines/reference/typeOfThisInInstanceMember2.errors.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember2.ts(14,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember2.ts (1 errors) ====
-    class C<T> {
-        x = this;
-        foo() {
-            return this;
-        }
-        constructor(x: T) {
-            var t = this;
-            t.x;
-            t.y;
-            t.z;
-            var r = t.foo();
-        }
-    
-        get y() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return this;
-        }
-    
-        z: T;
-    }
-    
-    var c: C<string>;
-    // all ok
-    var r = c.x;
-    var ra = c.x.x.x;
-    var r2 = c.y;
-    var r3 = c.foo();
-    var r4 = c.z;
-    var rs = [r, r2, r3];
-    
-    rs.forEach(x => {
-        x.foo;
-        x.x;
-        x.y;
-        x.z;
-    });
\ No newline at end of file
diff --git a/tests/baselines/reference/typeOfThisInInstanceMember2.symbols b/tests/baselines/reference/typeOfThisInInstanceMember2.symbols
new file mode 100644
index 0000000000000..113431b14f6a8
--- /dev/null
+++ b/tests/baselines/reference/typeOfThisInInstanceMember2.symbols
@@ -0,0 +1,129 @@
+=== tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember2.ts ===
+class C<T> {
+>C : Symbol(C, Decl(typeOfThisInInstanceMember2.ts, 0, 0))
+>T : Symbol(T, Decl(typeOfThisInInstanceMember2.ts, 0, 8))
+
+    x = this;
+>x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>this : Symbol(C, Decl(typeOfThisInInstanceMember2.ts, 0, 0))
+
+    foo() {
+>foo : Symbol(C.foo, Decl(typeOfThisInInstanceMember2.ts, 1, 13))
+
+        return this;
+>this : Symbol(C, Decl(typeOfThisInInstanceMember2.ts, 0, 0))
+    }
+    constructor(x: T) {
+>x : Symbol(x, Decl(typeOfThisInInstanceMember2.ts, 5, 16))
+>T : Symbol(T, Decl(typeOfThisInInstanceMember2.ts, 0, 8))
+
+        var t = this;
+>t : Symbol(t, Decl(typeOfThisInInstanceMember2.ts, 6, 11))
+>this : Symbol(C, Decl(typeOfThisInInstanceMember2.ts, 0, 0))
+
+        t.x;
+>t.x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>t : Symbol(t, Decl(typeOfThisInInstanceMember2.ts, 6, 11))
+>x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+
+        t.y;
+>t.y : Symbol(C.y, Decl(typeOfThisInInstanceMember2.ts, 11, 5))
+>t : Symbol(t, Decl(typeOfThisInInstanceMember2.ts, 6, 11))
+>y : Symbol(C.y, Decl(typeOfThisInInstanceMember2.ts, 11, 5))
+
+        t.z;
+>t.z : Symbol(C.z, Decl(typeOfThisInInstanceMember2.ts, 15, 5))
+>t : Symbol(t, Decl(typeOfThisInInstanceMember2.ts, 6, 11))
+>z : Symbol(C.z, Decl(typeOfThisInInstanceMember2.ts, 15, 5))
+
+        var r = t.foo();
+>r : Symbol(r, Decl(typeOfThisInInstanceMember2.ts, 10, 11))
+>t.foo : Symbol(C.foo, Decl(typeOfThisInInstanceMember2.ts, 1, 13))
+>t : Symbol(t, Decl(typeOfThisInInstanceMember2.ts, 6, 11))
+>foo : Symbol(C.foo, Decl(typeOfThisInInstanceMember2.ts, 1, 13))
+    }
+
+    get y() {
+>y : Symbol(C.y, Decl(typeOfThisInInstanceMember2.ts, 11, 5))
+
+        return this;
+>this : Symbol(C, Decl(typeOfThisInInstanceMember2.ts, 0, 0))
+    }
+
+    z: T;
+>z : Symbol(C.z, Decl(typeOfThisInInstanceMember2.ts, 15, 5))
+>T : Symbol(T, Decl(typeOfThisInInstanceMember2.ts, 0, 8))
+}
+
+var c: C<string>;
+>c : Symbol(c, Decl(typeOfThisInInstanceMember2.ts, 20, 3))
+>C : Symbol(C, Decl(typeOfThisInInstanceMember2.ts, 0, 0))
+
+// all ok
+var r = c.x;
+>r : Symbol(r, Decl(typeOfThisInInstanceMember2.ts, 22, 3))
+>c.x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>c : Symbol(c, Decl(typeOfThisInInstanceMember2.ts, 20, 3))
+>x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+
+var ra = c.x.x.x;
+>ra : Symbol(ra, Decl(typeOfThisInInstanceMember2.ts, 23, 3))
+>c.x.x.x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>c.x.x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>c.x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>c : Symbol(c, Decl(typeOfThisInInstanceMember2.ts, 20, 3))
+>x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+
+var r2 = c.y;
+>r2 : Symbol(r2, Decl(typeOfThisInInstanceMember2.ts, 24, 3))
+>c.y : Symbol(C.y, Decl(typeOfThisInInstanceMember2.ts, 11, 5))
+>c : Symbol(c, Decl(typeOfThisInInstanceMember2.ts, 20, 3))
+>y : Symbol(C.y, Decl(typeOfThisInInstanceMember2.ts, 11, 5))
+
+var r3 = c.foo();
+>r3 : Symbol(r3, Decl(typeOfThisInInstanceMember2.ts, 25, 3))
+>c.foo : Symbol(C.foo, Decl(typeOfThisInInstanceMember2.ts, 1, 13))
+>c : Symbol(c, Decl(typeOfThisInInstanceMember2.ts, 20, 3))
+>foo : Symbol(C.foo, Decl(typeOfThisInInstanceMember2.ts, 1, 13))
+
+var r4 = c.z;
+>r4 : Symbol(r4, Decl(typeOfThisInInstanceMember2.ts, 26, 3))
+>c.z : Symbol(C.z, Decl(typeOfThisInInstanceMember2.ts, 15, 5))
+>c : Symbol(c, Decl(typeOfThisInInstanceMember2.ts, 20, 3))
+>z : Symbol(C.z, Decl(typeOfThisInInstanceMember2.ts, 15, 5))
+
+var rs = [r, r2, r3];
+>rs : Symbol(rs, Decl(typeOfThisInInstanceMember2.ts, 27, 3))
+>r : Symbol(r, Decl(typeOfThisInInstanceMember2.ts, 22, 3))
+>r2 : Symbol(r2, Decl(typeOfThisInInstanceMember2.ts, 24, 3))
+>r3 : Symbol(r3, Decl(typeOfThisInInstanceMember2.ts, 25, 3))
+
+rs.forEach(x => {
+>rs.forEach : Symbol(Array.forEach, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>rs : Symbol(rs, Decl(typeOfThisInInstanceMember2.ts, 27, 3))
+>forEach : Symbol(Array.forEach, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(typeOfThisInInstanceMember2.ts, 29, 11))
+
+    x.foo;
+>x.foo : Symbol(C.foo, Decl(typeOfThisInInstanceMember2.ts, 1, 13))
+>x : Symbol(x, Decl(typeOfThisInInstanceMember2.ts, 29, 11))
+>foo : Symbol(C.foo, Decl(typeOfThisInInstanceMember2.ts, 1, 13))
+
+    x.x;
+>x.x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+>x : Symbol(x, Decl(typeOfThisInInstanceMember2.ts, 29, 11))
+>x : Symbol(C.x, Decl(typeOfThisInInstanceMember2.ts, 0, 12))
+
+    x.y;
+>x.y : Symbol(C.y, Decl(typeOfThisInInstanceMember2.ts, 11, 5))
+>x : Symbol(x, Decl(typeOfThisInInstanceMember2.ts, 29, 11))
+>y : Symbol(C.y, Decl(typeOfThisInInstanceMember2.ts, 11, 5))
+
+    x.z;
+>x.z : Symbol(C.z, Decl(typeOfThisInInstanceMember2.ts, 15, 5))
+>x : Symbol(x, Decl(typeOfThisInInstanceMember2.ts, 29, 11))
+>z : Symbol(C.z, Decl(typeOfThisInInstanceMember2.ts, 15, 5))
+
+});
diff --git a/tests/baselines/reference/typeOfThisInInstanceMember2.types b/tests/baselines/reference/typeOfThisInInstanceMember2.types
new file mode 100644
index 0000000000000..f3a38dccfa180
--- /dev/null
+++ b/tests/baselines/reference/typeOfThisInInstanceMember2.types
@@ -0,0 +1,134 @@
+=== tests/cases/conformance/classes/members/instanceAndStaticMembers/typeOfThisInInstanceMember2.ts ===
+class C<T> {
+>C : C<T>
+>T : T
+
+    x = this;
+>x : this
+>this : this
+
+    foo() {
+>foo : () => this
+
+        return this;
+>this : this
+    }
+    constructor(x: T) {
+>x : T
+>T : T
+
+        var t = this;
+>t : this
+>this : this
+
+        t.x;
+>t.x : this
+>t : this
+>x : this
+
+        t.y;
+>t.y : this
+>t : this
+>y : this
+
+        t.z;
+>t.z : T
+>t : this
+>z : T
+
+        var r = t.foo();
+>r : this
+>t.foo() : this
+>t.foo : () => this
+>t : this
+>foo : () => this
+    }
+
+    get y() {
+>y : this
+
+        return this;
+>this : this
+    }
+
+    z: T;
+>z : T
+>T : T
+}
+
+var c: C<string>;
+>c : C<string>
+>C : C<T>
+
+// all ok
+var r = c.x;
+>r : C<string>
+>c.x : C<string>
+>c : C<string>
+>x : C<string>
+
+var ra = c.x.x.x;
+>ra : C<string>
+>c.x.x.x : C<string>
+>c.x.x : C<string>
+>c.x : C<string>
+>c : C<string>
+>x : C<string>
+>x : C<string>
+>x : C<string>
+
+var r2 = c.y;
+>r2 : C<string>
+>c.y : C<string>
+>c : C<string>
+>y : C<string>
+
+var r3 = c.foo();
+>r3 : C<string>
+>c.foo() : C<string>
+>c.foo : () => C<string>
+>c : C<string>
+>foo : () => C<string>
+
+var r4 = c.z;
+>r4 : string
+>c.z : string
+>c : C<string>
+>z : string
+
+var rs = [r, r2, r3];
+>rs : C<string>[]
+>[r, r2, r3] : C<string>[]
+>r : C<string>
+>r2 : C<string>
+>r3 : C<string>
+
+rs.forEach(x => {
+>rs.forEach(x => {    x.foo;    x.x;    x.y;    x.z;}) : void
+>rs.forEach : { (callbackfn: (this: void, value: C<string>, index: number, array: C<string>[]) => void): void; (callbackfn: (this: void, value: C<string>, index: number, array: C<string>[]) => void, thisArg: undefined): void; <Z>(callbackfn: (this: Z, value: C<string>, index: number, array: C<string>[]) => void, thisArg: Z): void; }
+>rs : C<string>[]
+>forEach : { (callbackfn: (this: void, value: C<string>, index: number, array: C<string>[]) => void): void; (callbackfn: (this: void, value: C<string>, index: number, array: C<string>[]) => void, thisArg: undefined): void; <Z>(callbackfn: (this: Z, value: C<string>, index: number, array: C<string>[]) => void, thisArg: Z): void; }
+>x => {    x.foo;    x.x;    x.y;    x.z;} : (this: void, x: C<string>) => void
+>x : C<string>
+
+    x.foo;
+>x.foo : () => C<string>
+>x : C<string>
+>foo : () => C<string>
+
+    x.x;
+>x.x : C<string>
+>x : C<string>
+>x : C<string>
+
+    x.y;
+>x.y : C<string>
+>x : C<string>
+>y : C<string>
+
+    x.z;
+>x.z : string
+>x : C<string>
+>z : string
+
+});
diff --git a/tests/baselines/reference/typeOfThisInStatics.errors.txt b/tests/baselines/reference/typeOfThisInStatics.errors.txt
deleted file mode 100644
index bfdeb22d9f853..0000000000000
--- a/tests/baselines/reference/typeOfThisInStatics.errors.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-tests/cases/compiler/typeOfThisInStatics.ts(5,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/typeOfThisInStatics.ts (1 errors) ====
-    class C {
-        static foo() {
-            var r = this;
-        }
-        static get x() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var r = this;
-            return 1;
-        }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/typeOfThisInStatics.symbols b/tests/baselines/reference/typeOfThisInStatics.symbols
new file mode 100644
index 0000000000000..32cd87221de73
--- /dev/null
+++ b/tests/baselines/reference/typeOfThisInStatics.symbols
@@ -0,0 +1,22 @@
+=== tests/cases/compiler/typeOfThisInStatics.ts ===
+class C {
+>C : Symbol(C, Decl(typeOfThisInStatics.ts, 0, 0))
+
+    static foo() {
+>foo : Symbol(C.foo, Decl(typeOfThisInStatics.ts, 0, 9))
+
+        var r = this;
+>r : Symbol(r, Decl(typeOfThisInStatics.ts, 2, 11))
+>this : Symbol(C, Decl(typeOfThisInStatics.ts, 0, 0))
+    }
+    static get x() {
+>x : Symbol(C.x, Decl(typeOfThisInStatics.ts, 3, 5))
+
+        var r = this;
+>r : Symbol(r, Decl(typeOfThisInStatics.ts, 5, 11))
+>this : Symbol(C, Decl(typeOfThisInStatics.ts, 0, 0))
+
+        return 1;
+    }
+}
+
diff --git a/tests/baselines/reference/typeOfThisInStatics.types b/tests/baselines/reference/typeOfThisInStatics.types
new file mode 100644
index 0000000000000..534115f142e49
--- /dev/null
+++ b/tests/baselines/reference/typeOfThisInStatics.types
@@ -0,0 +1,23 @@
+=== tests/cases/compiler/typeOfThisInStatics.ts ===
+class C {
+>C : C
+
+    static foo() {
+>foo : () => void
+
+        var r = this;
+>r : typeof C
+>this : typeof C
+    }
+    static get x() {
+>x : number
+
+        var r = this;
+>r : typeof C
+>this : typeof C
+
+        return 1;
+>1 : 1
+    }
+}
+
diff --git a/tests/baselines/reference/typeParameterCompatibilityAccrossDeclarations.js b/tests/baselines/reference/typeParameterCompatibilityAccrossDeclarations.js
index 9a29313941771..c0264635538bd 100644
--- a/tests/baselines/reference/typeParameterCompatibilityAccrossDeclarations.js
+++ b/tests/baselines/reference/typeParameterCompatibilityAccrossDeclarations.js
@@ -25,7 +25,7 @@ i2 = a2; // no error
 //// [typeParameterCompatibilityAccrossDeclarations.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var a = {
         x: function (y) { return null; }
     };
diff --git a/tests/baselines/reference/typeParametersInStaticAccessors.errors.txt b/tests/baselines/reference/typeParametersInStaticAccessors.errors.txt
index 644cd703cdf81..40388d53532ea 100644
--- a/tests/baselines/reference/typeParametersInStaticAccessors.errors.txt
+++ b/tests/baselines/reference/typeParametersInStaticAccessors.errors.txt
@@ -1,19 +1,13 @@
-tests/cases/compiler/typeParametersInStaticAccessors.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/typeParametersInStaticAccessors.ts(2,29): error TS2302: Static members cannot reference class type parameters.
-tests/cases/compiler/typeParametersInStaticAccessors.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/typeParametersInStaticAccessors.ts(3,28): error TS2302: Static members cannot reference class type parameters.
 
 
-==== tests/cases/compiler/typeParametersInStaticAccessors.ts (4 errors) ====
+==== tests/cases/compiler/typeParametersInStaticAccessors.ts (2 errors) ====
     class foo<T> {
         static get Foo(): () => T { return null; }
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                                 ~
 !!! error TS2302: Static members cannot reference class type parameters.
         static set Bar(v: { v: T }) { }
-                   ~~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
                                ~
 !!! error TS2302: Static members cannot reference class type parameters.
     } 
\ No newline at end of file
diff --git a/tests/baselines/reference/typePredicateInLoop.js b/tests/baselines/reference/typePredicateInLoop.js
index e3e01d13ef10d..f0b5d8421ce0d 100644
--- a/tests/baselines/reference/typePredicateInLoop.js
+++ b/tests/baselines/reference/typePredicateInLoop.js
@@ -24,7 +24,7 @@ export function y(arg: Type): void {
 //// [typePredicateInLoop.js]
 "use strict";
 // Repro from #12101
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var guard = function (arg) { return arg.type === 1; };
 var otherFunc = function (arg1, arg2) { };
 function y(arg) {
diff --git a/tests/baselines/reference/typeQueryOnClass.errors.txt b/tests/baselines/reference/typeQueryOnClass.errors.txt
deleted file mode 100644
index 5198067576aaf..0000000000000
--- a/tests/baselines/reference/typeQueryOnClass.errors.txt
+++ /dev/null
@@ -1,77 +0,0 @@
-tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts(15,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts(18,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts(21,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts(30,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts(33,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts(36,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts (6 errors) ====
-    class C<T> {
-        constructor(x: number);
-        constructor(x: string);
-        constructor(public x) { }
-    
-        static foo(x: number);
-        static foo(x: {});
-        static foo(x) { }
-    
-        static bar(x) { }
-    
-        static sa = 1;
-        static sb = () => 1;
-    
-        static get sc() {
-                   ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return 1;
-        }
-        static set sc(x) {
-                   ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        }
-    
-        static get sd() {
-                   ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return 1;
-        }
-    
-        baz(x): string { return ''; }
-    
-        ia = 1;
-        ib = () => this.ia;
-    
-        get ic() {
-            ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return 1;
-        }
-        set ic(x) {
-            ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-        }
-    
-        get id() {
-            ~~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            return 1;
-        }
-    
-    }
-    
-    var c: C<string>;
-    
-    // BUG 820454
-    var r1: typeof C;
-    var r2: typeof c;
-    
-    class D<T> {
-        constructor(public y?) { }
-        x: T;
-        foo() { }
-    }
-    
-    var d: D<string>;
-    var r3: typeof D;
-    var r4: typeof d;
\ No newline at end of file
diff --git a/tests/baselines/reference/typeQueryOnClass.symbols b/tests/baselines/reference/typeQueryOnClass.symbols
new file mode 100644
index 0000000000000..bb3e372542a82
--- /dev/null
+++ b/tests/baselines/reference/typeQueryOnClass.symbols
@@ -0,0 +1,123 @@
+=== tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts ===
+class C<T> {
+>C : Symbol(C, Decl(typeQueryOnClass.ts, 0, 0))
+>T : Symbol(T, Decl(typeQueryOnClass.ts, 0, 8))
+
+    constructor(x: number);
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 1, 16))
+
+    constructor(x: string);
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 2, 16))
+
+    constructor(public x) { }
+>x : Symbol(C.x, Decl(typeQueryOnClass.ts, 3, 16))
+
+    static foo(x: number);
+>foo : Symbol(C.foo, Decl(typeQueryOnClass.ts, 3, 29), Decl(typeQueryOnClass.ts, 5, 26), Decl(typeQueryOnClass.ts, 6, 22))
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 5, 15))
+
+    static foo(x: {});
+>foo : Symbol(C.foo, Decl(typeQueryOnClass.ts, 3, 29), Decl(typeQueryOnClass.ts, 5, 26), Decl(typeQueryOnClass.ts, 6, 22))
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 6, 15))
+
+    static foo(x) { }
+>foo : Symbol(C.foo, Decl(typeQueryOnClass.ts, 3, 29), Decl(typeQueryOnClass.ts, 5, 26), Decl(typeQueryOnClass.ts, 6, 22))
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 7, 15))
+
+    static bar(x) { }
+>bar : Symbol(C.bar, Decl(typeQueryOnClass.ts, 7, 21))
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 9, 15))
+
+    static sa = 1;
+>sa : Symbol(C.sa, Decl(typeQueryOnClass.ts, 9, 21))
+
+    static sb = () => 1;
+>sb : Symbol(C.sb, Decl(typeQueryOnClass.ts, 11, 18))
+
+    static get sc() {
+>sc : Symbol(C.sc, Decl(typeQueryOnClass.ts, 12, 24), Decl(typeQueryOnClass.ts, 16, 5))
+
+        return 1;
+    }
+    static set sc(x) {
+>sc : Symbol(C.sc, Decl(typeQueryOnClass.ts, 12, 24), Decl(typeQueryOnClass.ts, 16, 5))
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 17, 18))
+    }
+
+    static get sd() {
+>sd : Symbol(C.sd, Decl(typeQueryOnClass.ts, 18, 5))
+
+        return 1;
+    }
+
+    baz(x): string { return ''; }
+>baz : Symbol(C.baz, Decl(typeQueryOnClass.ts, 22, 5))
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 24, 8))
+
+    ia = 1;
+>ia : Symbol(C.ia, Decl(typeQueryOnClass.ts, 24, 33))
+
+    ib = () => this.ia;
+>ib : Symbol(C.ib, Decl(typeQueryOnClass.ts, 26, 11))
+>this.ia : Symbol(C.ia, Decl(typeQueryOnClass.ts, 24, 33))
+>this : Symbol(C, Decl(typeQueryOnClass.ts, 0, 0))
+>ia : Symbol(C.ia, Decl(typeQueryOnClass.ts, 24, 33))
+
+    get ic() {
+>ic : Symbol(C.ic, Decl(typeQueryOnClass.ts, 27, 23), Decl(typeQueryOnClass.ts, 31, 5))
+
+        return 1;
+    }
+    set ic(x) {
+>ic : Symbol(C.ic, Decl(typeQueryOnClass.ts, 27, 23), Decl(typeQueryOnClass.ts, 31, 5))
+>x : Symbol(x, Decl(typeQueryOnClass.ts, 32, 11))
+    }
+
+    get id() {
+>id : Symbol(C.id, Decl(typeQueryOnClass.ts, 33, 5))
+
+        return 1;
+    }
+
+}
+
+var c: C<string>;
+>c : Symbol(c, Decl(typeQueryOnClass.ts, 41, 3))
+>C : Symbol(C, Decl(typeQueryOnClass.ts, 0, 0))
+
+// BUG 820454
+var r1: typeof C;
+>r1 : Symbol(r1, Decl(typeQueryOnClass.ts, 44, 3))
+>C : Symbol(C, Decl(typeQueryOnClass.ts, 0, 0))
+
+var r2: typeof c;
+>r2 : Symbol(r2, Decl(typeQueryOnClass.ts, 45, 3))
+>c : Symbol(c, Decl(typeQueryOnClass.ts, 41, 3))
+
+class D<T> {
+>D : Symbol(D, Decl(typeQueryOnClass.ts, 45, 17))
+>T : Symbol(T, Decl(typeQueryOnClass.ts, 47, 8))
+
+    constructor(public y?) { }
+>y : Symbol(D.y, Decl(typeQueryOnClass.ts, 48, 16))
+
+    x: T;
+>x : Symbol(D.x, Decl(typeQueryOnClass.ts, 48, 30))
+>T : Symbol(T, Decl(typeQueryOnClass.ts, 47, 8))
+
+    foo() { }
+>foo : Symbol(D.foo, Decl(typeQueryOnClass.ts, 49, 9))
+}
+
+var d: D<string>;
+>d : Symbol(d, Decl(typeQueryOnClass.ts, 53, 3))
+>D : Symbol(D, Decl(typeQueryOnClass.ts, 45, 17))
+
+var r3: typeof D;
+>r3 : Symbol(r3, Decl(typeQueryOnClass.ts, 54, 3))
+>D : Symbol(D, Decl(typeQueryOnClass.ts, 45, 17))
+
+var r4: typeof d;
+>r4 : Symbol(r4, Decl(typeQueryOnClass.ts, 55, 3))
+>d : Symbol(d, Decl(typeQueryOnClass.ts, 53, 3))
+
diff --git a/tests/baselines/reference/typeQueryOnClass.types b/tests/baselines/reference/typeQueryOnClass.types
new file mode 100644
index 0000000000000..ed85d6575e8fe
--- /dev/null
+++ b/tests/baselines/reference/typeQueryOnClass.types
@@ -0,0 +1,133 @@
+=== tests/cases/conformance/types/specifyingTypes/typeQueries/typeQueryOnClass.ts ===
+class C<T> {
+>C : C<T>
+>T : T
+
+    constructor(x: number);
+>x : number
+
+    constructor(x: string);
+>x : string
+
+    constructor(public x) { }
+>x : any
+
+    static foo(x: number);
+>foo : { (x: number): any; (x: {}): any; }
+>x : number
+
+    static foo(x: {});
+>foo : { (x: number): any; (x: {}): any; }
+>x : {}
+
+    static foo(x) { }
+>foo : { (x: number): any; (x: {}): any; }
+>x : any
+
+    static bar(x) { }
+>bar : (x: any) => void
+>x : any
+
+    static sa = 1;
+>sa : number
+>1 : 1
+
+    static sb = () => 1;
+>sb : () => number
+>() => 1 : () => number
+>1 : 1
+
+    static get sc() {
+>sc : number
+
+        return 1;
+>1 : 1
+    }
+    static set sc(x) {
+>sc : number
+>x : number
+    }
+
+    static get sd() {
+>sd : number
+
+        return 1;
+>1 : 1
+    }
+
+    baz(x): string { return ''; }
+>baz : (x: any) => string
+>x : any
+>'' : ""
+
+    ia = 1;
+>ia : number
+>1 : 1
+
+    ib = () => this.ia;
+>ib : () => number
+>() => this.ia : () => number
+>this.ia : number
+>this : this
+>ia : number
+
+    get ic() {
+>ic : number
+
+        return 1;
+>1 : 1
+    }
+    set ic(x) {
+>ic : number
+>x : number
+    }
+
+    get id() {
+>id : number
+
+        return 1;
+>1 : 1
+    }
+
+}
+
+var c: C<string>;
+>c : C<string>
+>C : C<T>
+
+// BUG 820454
+var r1: typeof C;
+>r1 : typeof C
+>C : typeof C
+
+var r2: typeof c;
+>r2 : C<string>
+>c : C<string>
+
+class D<T> {
+>D : D<T>
+>T : T
+
+    constructor(public y?) { }
+>y : any
+
+    x: T;
+>x : T
+>T : T
+
+    foo() { }
+>foo : () => void
+}
+
+var d: D<string>;
+>d : D<string>
+>D : D<T>
+
+var r3: typeof D;
+>r3 : typeof D
+>D : typeof D
+
+var r4: typeof d;
+>r4 : D<string>
+>d : D<string>
+
diff --git a/tests/baselines/reference/typeQueryWithReservedWords.js b/tests/baselines/reference/typeQueryWithReservedWords.js
index 09c3b642a36d0..7561eeddb7528 100644
--- a/tests/baselines/reference/typeQueryWithReservedWords.js
+++ b/tests/baselines/reference/typeQueryWithReservedWords.js
@@ -21,9 +21,9 @@ var Controller = (function () {
     }
     Controller.prototype.create = function () {
     };
-    Controller.prototype["delete"] = function () {
+    Controller.prototype.delete = function () {
     };
-    Controller.prototype["var"] = function () {
+    Controller.prototype.var = function () {
     };
     return Controller;
 }());
diff --git a/tests/baselines/reference/typeReferenceDirectives10.js b/tests/baselines/reference/typeReferenceDirectives10.js
index 569159df42171..a157fb36a8a5e 100644
--- a/tests/baselines/reference/typeReferenceDirectives10.js
+++ b/tests/baselines/reference/typeReferenceDirectives10.js
@@ -16,7 +16,7 @@ export interface A {
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 
 
 //// [app.d.ts]
diff --git a/tests/baselines/reference/typeReferenceDirectives13.js b/tests/baselines/reference/typeReferenceDirectives13.js
index 03dabec933100..81ae523573947 100644
--- a/tests/baselines/reference/typeReferenceDirectives13.js
+++ b/tests/baselines/reference/typeReferenceDirectives13.js
@@ -16,7 +16,7 @@ export interface A {
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 
 
 //// [app.d.ts]
diff --git a/tests/baselines/reference/typeReferenceDirectives5.js b/tests/baselines/reference/typeReferenceDirectives5.js
index aabb879c485bc..68d909695f1aa 100644
--- a/tests/baselines/reference/typeReferenceDirectives5.js
+++ b/tests/baselines/reference/typeReferenceDirectives5.js
@@ -15,7 +15,7 @@ export interface A {
 
 //// [app.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 
 
 //// [app.d.ts]
diff --git a/tests/baselines/reference/typeReferenceDirectives7.js b/tests/baselines/reference/typeReferenceDirectives7.js
index 7be0651a58137..a9ea47765a49b 100644
--- a/tests/baselines/reference/typeReferenceDirectives7.js
+++ b/tests/baselines/reference/typeReferenceDirectives7.js
@@ -17,7 +17,7 @@ export let y = () => x
 //// [app.js]
 "use strict";
 /// <reference types="lib"/>
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.$ = 1;
 exports.y = function () { return exports.x; };
 
diff --git a/tests/baselines/reference/typeReferenceDirectives8.js b/tests/baselines/reference/typeReferenceDirectives8.js
index b843ec063076d..39be05dd08791 100644
--- a/tests/baselines/reference/typeReferenceDirectives8.js
+++ b/tests/baselines/reference/typeReferenceDirectives8.js
@@ -12,12 +12,12 @@ export const bar = foo();
 
 //// [mod1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() { return { x: 1 }; }
 exports.foo = foo;
 //// [mod2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var mod1_1 = require("./mod1");
 exports.bar = mod1_1.foo();
 
diff --git a/tests/baselines/reference/typeReferenceDirectives9.js b/tests/baselines/reference/typeReferenceDirectives9.js
index 54685ef7961b2..6b4e5c6c6d1f1 100644
--- a/tests/baselines/reference/typeReferenceDirectives9.js
+++ b/tests/baselines/reference/typeReferenceDirectives9.js
@@ -33,7 +33,7 @@ export const bar = Cls.bar();
 
 //// [main.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Cls = (function () {
     function Cls() {
     }
@@ -43,12 +43,12 @@ exports.Cls = Cls;
 //// [mod1.js]
 "use strict";
 /// <reference types="lib" />
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var main_1 = require("./main");
 main_1.Cls.prototype.foo = function () { return undefined; };
 //// [mod2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var main_1 = require("./main");
 require("./mod1");
 exports.cls = main_1.Cls;
diff --git a/tests/baselines/reference/typeResolution.js b/tests/baselines/reference/typeResolution.js
index cb8a40cf0a6e6..ddfc0583f7b8a 100644
--- a/tests/baselines/reference/typeResolution.js
+++ b/tests/baselines/reference/typeResolution.js
@@ -113,7 +113,7 @@ module TopLevelModule2 {
 //// [typeResolution.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var TopLevelModule1;
     (function (TopLevelModule1) {
         var SubModule1;
diff --git a/tests/baselines/reference/typeResolution.sourcemap.txt b/tests/baselines/reference/typeResolution.sourcemap.txt
index 19e8b9991d154..0bcd4faa6bdbc 100644
--- a/tests/baselines/reference/typeResolution.sourcemap.txt
+++ b/tests/baselines/reference/typeResolution.sourcemap.txt
@@ -10,7 +10,7 @@ sourceFile:typeResolution.ts
 -------------------------------------------------------------------
 >>>define(["require", "exports"], function (require, exports) {
 >>>    "use strict";
->>>    exports.__esModule = true;
+>>>    Object.defineProperty(exports, "__esModule", { value: true });
 >>>    var TopLevelModule1;
 1 >^^^^
 2 >    ^^^^
diff --git a/tests/baselines/reference/typeRootsFromMultipleNodeModulesDirectories.js b/tests/baselines/reference/typeRootsFromMultipleNodeModulesDirectories.js
index 1c3663a04d7dc..964af423ec606 100644
--- a/tests/baselines/reference/typeRootsFromMultipleNodeModulesDirectories.js
+++ b/tests/baselines/reference/typeRootsFromMultipleNodeModulesDirectories.js
@@ -24,7 +24,7 @@ x + y + z;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var xyz_1 = require("xyz");
 var pdq_1 = require("pdq");
 var abc_1 = require("abc");
diff --git a/tests/baselines/reference/typeRootsFromNodeModulesInParentDirectory.js b/tests/baselines/reference/typeRootsFromNodeModulesInParentDirectory.js
index ee18260fe8c88..4fa333d7bce9d 100644
--- a/tests/baselines/reference/typeRootsFromNodeModulesInParentDirectory.js
+++ b/tests/baselines/reference/typeRootsFromNodeModulesInParentDirectory.js
@@ -12,6 +12,6 @@ x;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var xyz_1 = require("xyz");
 xyz_1.x;
diff --git a/tests/baselines/reference/typeUsedAsValueError2.js b/tests/baselines/reference/typeUsedAsValueError2.js
index 2c068d4f4d27e..d7b083e1b6c96 100644
--- a/tests/baselines/reference/typeUsedAsValueError2.js
+++ b/tests/baselines/reference/typeUsedAsValueError2.js
@@ -24,17 +24,17 @@ HelloNamespace.world;
 //// [helloInterface.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [helloNamespace.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
 //// [world.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     HelloInterface.world;
     HelloNamespace.world;
 });
diff --git a/tests/baselines/reference/typeofANonExportedType.js b/tests/baselines/reference/typeofANonExportedType.js
index ba4451243cafe..a9d9c64bfb8f7 100644
--- a/tests/baselines/reference/typeofANonExportedType.js
+++ b/tests/baselines/reference/typeofANonExportedType.js
@@ -53,7 +53,7 @@ export var r13: typeof foo;
 
 //// [typeofANonExportedType.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x = 1;
 var y = { foo: '' };
 var C = (function () {
diff --git a/tests/baselines/reference/typeofAmbientExternalModules.js b/tests/baselines/reference/typeofAmbientExternalModules.js
index 2500193ebde82..2582708a829d9 100644
--- a/tests/baselines/reference/typeofAmbientExternalModules.js
+++ b/tests/baselines/reference/typeofAmbientExternalModules.js
@@ -20,7 +20,7 @@ y2 = ext;
 
 //// [typeofAmbientExternalModules_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
@@ -37,7 +37,7 @@ var D = (function () {
 module.exports = D;
 //// [typeofAmbientExternalModules_2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='typeofAmbientExternalModules_0.ts'/>
 ///<reference path='typeofAmbientExternalModules_1.ts'/>
 var ext = require("./typeofAmbientExternalModules_0");
diff --git a/tests/baselines/reference/typeofAnExportedType.js b/tests/baselines/reference/typeofAnExportedType.js
index e166f6b745b19..038de459ca974 100644
--- a/tests/baselines/reference/typeofAnExportedType.js
+++ b/tests/baselines/reference/typeofAnExportedType.js
@@ -53,7 +53,7 @@ export var r13: typeof foo;
 
 //// [typeofAnExportedType.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = 1;
 exports.y = { foo: '' };
 var C = (function () {
diff --git a/tests/baselines/reference/typeofExternalModules.js b/tests/baselines/reference/typeofExternalModules.js
index 97c6b6d7278a1..61639c73453d1 100644
--- a/tests/baselines/reference/typeofExternalModules.js
+++ b/tests/baselines/reference/typeofExternalModules.js
@@ -18,7 +18,7 @@ y2 = ext;
 
 //// [typeofExternalModules_external.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
@@ -35,7 +35,7 @@ var D = (function () {
 module.exports = D;
 //// [typeofExternalModules_core.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var ext = require("./typeofExternalModules_external");
 var exp = require("./typeofExternalModules_exportAssign");
 var y1 = ext;
diff --git a/tests/baselines/reference/typesOnlyExternalModuleStillHasInstance.js b/tests/baselines/reference/typesOnlyExternalModuleStillHasInstance.js
index 4a93b9293a5c5..8be5e7caa926b 100644
--- a/tests/baselines/reference/typesOnlyExternalModuleStillHasInstance.js
+++ b/tests/baselines/reference/typesOnlyExternalModuleStillHasInstance.js
@@ -22,10 +22,10 @@ var y: {M2: Object} = foo0;
 
 //// [foo_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [foo_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo0 = require("./foo_0");
 // Per 11.2.3, foo_0 should still be "instantiated", albeit with no members
 var x = {};
diff --git a/tests/baselines/reference/typingsLookup4.js b/tests/baselines/reference/typingsLookup4.js
index d2424644d1626..0ad348e60f9f2 100644
--- a/tests/baselines/reference/typingsLookup4.js
+++ b/tests/baselines/reference/typingsLookup4.js
@@ -34,15 +34,15 @@ j + k + l + m;
 
 //// [lquery.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.l = 2;
 //// [index.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.m = 3;
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var jquery_1 = require("jquery");
 var kquery_1 = require("kquery");
 var lquery_1 = require("lquery");
diff --git a/tests/baselines/reference/typingsLookupAmd.js b/tests/baselines/reference/typingsLookupAmd.js
index 11ccba92814a8..d2552a2de711d 100644
--- a/tests/baselines/reference/typingsLookupAmd.js
+++ b/tests/baselines/reference/typingsLookupAmd.js
@@ -14,5 +14,5 @@ import {B} from "b";
 //// [foo.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
 });
diff --git a/tests/baselines/reference/umd-augmentation-1.js b/tests/baselines/reference/umd-augmentation-1.js
index e7f7ae5bad5f3..6137a45b0f418 100644
--- a/tests/baselines/reference/umd-augmentation-1.js
+++ b/tests/baselines/reference/umd-augmentation-1.js
@@ -40,7 +40,7 @@ var t = p.x;
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="math2d-augment.d.ts" />
 var m = require("math2d");
 var v = new m.Vector(3, 2);
diff --git a/tests/baselines/reference/umd-augmentation-3.js b/tests/baselines/reference/umd-augmentation-3.js
index f0fb1fe0f4270..9350a0c1d14cb 100644
--- a/tests/baselines/reference/umd-augmentation-3.js
+++ b/tests/baselines/reference/umd-augmentation-3.js
@@ -46,7 +46,7 @@ var t = p.x;
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="math2d-augment.d.ts" />
 var m = require("math2d");
 var v = new m.Vector(3, 2);
diff --git a/tests/baselines/reference/umd-errors.js b/tests/baselines/reference/umd-errors.js
index 2c9fbd809e175..9e075884b165b 100644
--- a/tests/baselines/reference/umd-errors.js
+++ b/tests/baselines/reference/umd-errors.js
@@ -33,4 +33,4 @@ export as namespace C2;
 
 //// [err5.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/umd3.js b/tests/baselines/reference/umd3.js
index 59b0e0ef2c29e..54aa4598b2035 100644
--- a/tests/baselines/reference/umd3.js
+++ b/tests/baselines/reference/umd3.js
@@ -15,7 +15,7 @@ let y: number = x.n;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Foo = require("./foo");
 Foo.fn();
 var x;
diff --git a/tests/baselines/reference/umd4.js b/tests/baselines/reference/umd4.js
index 2f17ee04858c1..00aec9578bb65 100644
--- a/tests/baselines/reference/umd4.js
+++ b/tests/baselines/reference/umd4.js
@@ -15,7 +15,7 @@ let y: number = x.n;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Bar = require("./foo");
 Bar.fn();
 var x;
diff --git a/tests/baselines/reference/umd5.js b/tests/baselines/reference/umd5.js
index 868243d4fd074..e31a5c9de4886 100644
--- a/tests/baselines/reference/umd5.js
+++ b/tests/baselines/reference/umd5.js
@@ -17,7 +17,7 @@ let z = Foo;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Bar = require("./foo");
 Bar.fn();
 var x;
diff --git a/tests/baselines/reference/umd8.js b/tests/baselines/reference/umd8.js
index 3aefdded756f3..a6a501057b99c 100644
--- a/tests/baselines/reference/umd8.js
+++ b/tests/baselines/reference/umd8.js
@@ -22,7 +22,7 @@ let x: any = Foo; // Not OK in value position
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var y; // OK in type position
 y.foo();
 var z; // OK in ns position
diff --git a/tests/baselines/reference/umdDependencyComment2.js b/tests/baselines/reference/umdDependencyComment2.js
index 021ba5254b001..7527f897e6e99 100644
--- a/tests/baselines/reference/umdDependencyComment2.js
+++ b/tests/baselines/reference/umdDependencyComment2.js
@@ -17,7 +17,7 @@ m1.f();
     }
 })(function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m1 = require("m2");
     m1.f();
 });
diff --git a/tests/baselines/reference/umdDependencyCommentName1.js b/tests/baselines/reference/umdDependencyCommentName1.js
index eba6f0cc16b74..06a8e2e0e1b37 100644
--- a/tests/baselines/reference/umdDependencyCommentName1.js
+++ b/tests/baselines/reference/umdDependencyCommentName1.js
@@ -17,7 +17,7 @@ m1.f();
     }
 })(function (require, exports, b) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m1 = require("m2");
     m1.f();
 });
diff --git a/tests/baselines/reference/umdDependencyCommentName2.js b/tests/baselines/reference/umdDependencyCommentName2.js
index 2ca52848d1557..484df50250aa4 100644
--- a/tests/baselines/reference/umdDependencyCommentName2.js
+++ b/tests/baselines/reference/umdDependencyCommentName2.js
@@ -21,7 +21,7 @@ m1.f();
     }
 })(function (require, exports, b, c) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var m1 = require("m2");
     m1.f();
 });
diff --git a/tests/baselines/reference/umdGlobalConflict.js b/tests/baselines/reference/umdGlobalConflict.js
index 114bdd643e45c..10c87be8eaef0 100644
--- a/tests/baselines/reference/umdGlobalConflict.js
+++ b/tests/baselines/reference/umdGlobalConflict.js
@@ -18,7 +18,7 @@ const p: string = Alpha.x;
 
 //// [consumer.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [global.js]
 // Should be OK, first in wins
 var p = Alpha.x;
diff --git a/tests/baselines/reference/unclosedExportClause01.js b/tests/baselines/reference/unclosedExportClause01.js
index e391068997de1..1bb0dfa227793 100644
--- a/tests/baselines/reference/unclosedExportClause01.js
+++ b/tests/baselines/reference/unclosedExportClause01.js
@@ -17,28 +17,28 @@ export { x as a, from "./t1"
 
 //// [t1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = "x";
 //// [t2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.x = t1_1.x;
 exports.from = t1_1.from;
 //// [t3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.from = t1_1.from;
 //// [t4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.a = t1_1.x;
 exports.from = t1_1.from;
 //// [t5.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var t1_1 = require("./t1");
 exports.a = t1_1.x;
 exports.from = t1_1.from;
diff --git a/tests/baselines/reference/unclosedExportClause02.js b/tests/baselines/reference/unclosedExportClause02.js
index c8955b03ca292..b9ea2fb1d0eb9 100644
--- a/tests/baselines/reference/unclosedExportClause02.js
+++ b/tests/baselines/reference/unclosedExportClause02.js
@@ -21,21 +21,21 @@ export { x as a, from
 
 //// [t1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 exports.x = "x";
 //// [t2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 "./t1";
 //// [t3.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 "./t1";
 //// [t4.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 "./t1";
 //// [t5.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 "./t1";
diff --git a/tests/baselines/reference/undeclaredModuleError.js b/tests/baselines/reference/undeclaredModuleError.js
index 927df99766eb4..a17ce090cec5b 100644
--- a/tests/baselines/reference/undeclaredModuleError.js
+++ b/tests/baselines/reference/undeclaredModuleError.js
@@ -18,7 +18,7 @@ function instrumentFile(covFileDir: string, covFileName: string, originalFilePat
 //// [undeclaredModuleError.js]
 define(["require", "exports", "fs"], function (require, exports, fs) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     function readdir(path, accept, callback) { }
     function join() {
         var paths = [];
diff --git a/tests/baselines/reference/untypedModuleImport.js b/tests/baselines/reference/untypedModuleImport.js
index 90fb9ab5f4386..15c569c05711c 100644
--- a/tests/baselines/reference/untypedModuleImport.js
+++ b/tests/baselines/reference/untypedModuleImport.js
@@ -23,18 +23,18 @@ foo(bar());
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("foo");
 foo.bar();
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo = require("foo");
 foo();
 //// [c.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo_1 = require("foo");
 require("./a");
 require("./b");
-foo_1["default"](foo_1.bar());
+foo_1.default(foo_1.bar());
diff --git a/tests/baselines/reference/untypedModuleImport_allowJs.js b/tests/baselines/reference/untypedModuleImport_allowJs.js
index 5d60df6687c4b..fcdb3d23210be 100644
--- a/tests/baselines/reference/untypedModuleImport_allowJs.js
+++ b/tests/baselines/reference/untypedModuleImport_allowJs.js
@@ -12,6 +12,6 @@ foo.bar();
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo_1 = require("foo");
-foo_1["default"].bar();
+foo_1.default.bar();
diff --git a/tests/baselines/reference/untypedModuleImport_noImplicitAny.js b/tests/baselines/reference/untypedModuleImport_noImplicitAny.js
index 86e2ae3c175e7..0d5dc388001af 100644
--- a/tests/baselines/reference/untypedModuleImport_noImplicitAny.js
+++ b/tests/baselines/reference/untypedModuleImport_noImplicitAny.js
@@ -11,4 +11,4 @@ import * as foo from "foo";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/untypedModuleImport_noLocalImports.js b/tests/baselines/reference/untypedModuleImport_noLocalImports.js
index 6328101a2ee00..e6819154fbb60 100644
--- a/tests/baselines/reference/untypedModuleImport_noLocalImports.js
+++ b/tests/baselines/reference/untypedModuleImport_noLocalImports.js
@@ -11,4 +11,4 @@ import * as foo from "./foo";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/untypedModuleImport_vsAmbient.js b/tests/baselines/reference/untypedModuleImport_vsAmbient.js
index 4273033fe2264..973d37b1b5941 100644
--- a/tests/baselines/reference/untypedModuleImport_vsAmbient.js
+++ b/tests/baselines/reference/untypedModuleImport_vsAmbient.js
@@ -18,7 +18,7 @@ x;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 /// <reference path="./declarations.d.ts" />
 var foo_1 = require("foo");
 foo_1.x;
diff --git a/tests/baselines/reference/untypedModuleImport_withAugmentation.js b/tests/baselines/reference/untypedModuleImport_withAugmentation.js
index 9d1770f5497b7..6712464e5be3c 100644
--- a/tests/baselines/reference/untypedModuleImport_withAugmentation.js
+++ b/tests/baselines/reference/untypedModuleImport_withAugmentation.js
@@ -15,6 +15,6 @@ x;
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var foo_1 = require("foo");
 foo_1.x;
diff --git a/tests/baselines/reference/untypedModuleImport_withAugmentation2.js b/tests/baselines/reference/untypedModuleImport_withAugmentation2.js
index 6a01db5dd251a..61f4440de324a 100644
--- a/tests/baselines/reference/untypedModuleImport_withAugmentation2.js
+++ b/tests/baselines/reference/untypedModuleImport_withAugmentation2.js
@@ -17,4 +17,4 @@ import { } from "augmenter";
 
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/unusedImportDeclaration.js b/tests/baselines/reference/unusedImportDeclaration.js
index 37f88dc65c32a..d4b2e2dc1654f 100644
--- a/tests/baselines/reference/unusedImportDeclaration.js
+++ b/tests/baselines/reference/unusedImportDeclaration.js
@@ -25,7 +25,7 @@ var TesterB = (function () {
 module.exports = TesterB;
 //// [unusedImportDeclaration_testerA.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var thingy = {
     me: "A"
 };
diff --git a/tests/baselines/reference/unusedImports1.js b/tests/baselines/reference/unusedImports1.js
index 6e7f90b9d544e..c949e78e680cd 100644
--- a/tests/baselines/reference/unusedImports1.js
+++ b/tests/baselines/reference/unusedImports1.js
@@ -10,7 +10,7 @@ import {Calculator} from "./file1"
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -19,4 +19,4 @@ var Calculator = (function () {
 exports.Calculator = Calculator;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/unusedImports11.js b/tests/baselines/reference/unusedImports11.js
index def7220e54579..222f6cc838ba9 100644
--- a/tests/baselines/reference/unusedImports11.js
+++ b/tests/baselines/reference/unusedImports11.js
@@ -19,23 +19,23 @@ new r.Member();
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Member = (function () {
     function Member() {
     }
     return Member;
 }());
 exports.Member = Member;
-exports["default"] = Member;
+exports.default = Member;
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var b_1 = require("./b");
 var b_2 = require("./b");
 var ns = require("./b");
 var r = require("./b");
 new b_1.Member();
-new b_2["default"]();
+new b_2.default();
 new b_2.Member();
 new ns.Member();
 new r.Member();
diff --git a/tests/baselines/reference/unusedImports12.js b/tests/baselines/reference/unusedImports12.js
index 32f0c05136029..6c7b9e02c317e 100644
--- a/tests/baselines/reference/unusedImports12.js
+++ b/tests/baselines/reference/unusedImports12.js
@@ -14,14 +14,14 @@ import r = require("./b");
 
 //// [b.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Member = (function () {
     function Member() {
     }
     return Member;
 }());
 exports.Member = Member;
-exports["default"] = Member;
+exports.default = Member;
 //// [a.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/unusedImports13.js b/tests/baselines/reference/unusedImports13.js
index de9c7f4d5ad13..46fbc0f745d0c 100644
--- a/tests/baselines/reference/unusedImports13.js
+++ b/tests/baselines/reference/unusedImports13.js
@@ -22,6 +22,6 @@ declare global {
 
 //// [foo.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 exports.FooComponent = <div></div>;
diff --git a/tests/baselines/reference/unusedImports14.js b/tests/baselines/reference/unusedImports14.js
index c67a069d815fa..757dce4f53c8c 100644
--- a/tests/baselines/reference/unusedImports14.js
+++ b/tests/baselines/reference/unusedImports14.js
@@ -22,6 +22,6 @@ declare global {
 
 //// [foo.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var React = require("react");
 exports.FooComponent = React.createElement("div", null);
diff --git a/tests/baselines/reference/unusedImports15.js b/tests/baselines/reference/unusedImports15.js
index 67c5365aad5a8..ed14cf303a620 100644
--- a/tests/baselines/reference/unusedImports15.js
+++ b/tests/baselines/reference/unusedImports15.js
@@ -22,6 +22,6 @@ declare global {
 
 //// [foo.jsx]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Element = require("react");
 exports.FooComponent = <div></div>;
diff --git a/tests/baselines/reference/unusedImports16.js b/tests/baselines/reference/unusedImports16.js
index 254183fe37835..e76093f2defcd 100644
--- a/tests/baselines/reference/unusedImports16.js
+++ b/tests/baselines/reference/unusedImports16.js
@@ -22,6 +22,6 @@ declare global {
 
 //// [foo.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Element = require("react");
 exports.FooComponent = Element.createElement("div", null);
diff --git a/tests/baselines/reference/unusedImports2.js b/tests/baselines/reference/unusedImports2.js
index 5f01507a44431..af9581dd7cc4f 100644
--- a/tests/baselines/reference/unusedImports2.js
+++ b/tests/baselines/reference/unusedImports2.js
@@ -18,7 +18,7 @@ x.handleChar();
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -31,7 +31,7 @@ function test() {
 exports.test = test;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file1_1 = require("./file1");
 var x = new file1_1.Calculator();
 x.handleChar();
diff --git a/tests/baselines/reference/unusedImports3.js b/tests/baselines/reference/unusedImports3.js
index 788cecf54703b..91a14ecb648d0 100644
--- a/tests/baselines/reference/unusedImports3.js
+++ b/tests/baselines/reference/unusedImports3.js
@@ -21,7 +21,7 @@ test2();
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -37,7 +37,7 @@ function test2() {
 exports.test2 = test2;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file1_1 = require("./file1");
 file1_1.test();
 file1_1.test2();
diff --git a/tests/baselines/reference/unusedImports4.js b/tests/baselines/reference/unusedImports4.js
index cfcc9eb1a61c0..06985167c3d61 100644
--- a/tests/baselines/reference/unusedImports4.js
+++ b/tests/baselines/reference/unusedImports4.js
@@ -22,7 +22,7 @@ test2();
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -38,7 +38,7 @@ function test2() {
 exports.test2 = test2;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file1_1 = require("./file1");
 var x = new file1_1.Calculator();
 x.handleChar();
diff --git a/tests/baselines/reference/unusedImports5.js b/tests/baselines/reference/unusedImports5.js
index 0ee931e57a59b..aee214111bc56 100644
--- a/tests/baselines/reference/unusedImports5.js
+++ b/tests/baselines/reference/unusedImports5.js
@@ -22,7 +22,7 @@ test();
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -38,7 +38,7 @@ function test2() {
 exports.test2 = test2;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file1_1 = require("./file1");
 var x = new file1_1.Calculator();
 x.handleChar();
diff --git a/tests/baselines/reference/unusedImports6.js b/tests/baselines/reference/unusedImports6.js
index ea7392de4e15c..b03b9cf1d875b 100644
--- a/tests/baselines/reference/unusedImports6.js
+++ b/tests/baselines/reference/unusedImports6.js
@@ -22,7 +22,7 @@ import d from "./file1"
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -35,7 +35,7 @@ function test() {
 exports.test = test;
 function test2() {
 }
-exports["default"] = test2;
+exports.default = test2;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/unusedImports7.js b/tests/baselines/reference/unusedImports7.js
index dc4f707f62999..7716a9918edbb 100644
--- a/tests/baselines/reference/unusedImports7.js
+++ b/tests/baselines/reference/unusedImports7.js
@@ -20,7 +20,7 @@ import * as n from "./file1"
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -33,7 +33,7 @@ function test() {
 exports.test = test;
 function test2() {
 }
-exports["default"] = test2;
+exports.default = test2;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/unusedImports8.js b/tests/baselines/reference/unusedImports8.js
index 88983976362b1..a5370e3a99da3 100644
--- a/tests/baselines/reference/unusedImports8.js
+++ b/tests/baselines/reference/unusedImports8.js
@@ -22,7 +22,7 @@ t1();
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -38,7 +38,7 @@ function test2() {
 exports.test2 = test2;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var file1_1 = require("./file1");
 var x = new file1_1.Calculator();
 x.handleChar();
diff --git a/tests/baselines/reference/unusedImports9.js b/tests/baselines/reference/unusedImports9.js
index e089a1445b9c3..55733fdb5a351 100644
--- a/tests/baselines/reference/unusedImports9.js
+++ b/tests/baselines/reference/unusedImports9.js
@@ -18,7 +18,7 @@ import c = require('./file1')
 
 //// [file1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var Calculator = (function () {
     function Calculator() {
     }
@@ -34,4 +34,4 @@ function test2() {
 exports.test2 = test2;
 //// [file2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
diff --git a/tests/baselines/reference/unusedInvalidTypeArguments.js b/tests/baselines/reference/unusedInvalidTypeArguments.js
index 955845ea01ac9..5a8b26a840e79 100644
--- a/tests/baselines/reference/unusedInvalidTypeArguments.js
+++ b/tests/baselines/reference/unusedInvalidTypeArguments.js
@@ -50,7 +50,7 @@ export class D extends C {
 //// [typeReference.js]
 "use strict";
 // Tests that types are marked as used, even if used in places that don't accept type arguments.
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [classReference.js]
 "use strict";
 var __extends = (this && this.__extends) || (function () {
@@ -63,7 +63,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var C = (function () {
     function C() {
     }
@@ -80,15 +80,15 @@ var D = (function (_super) {
 exports.D = D;
 //// [interface.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [call.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var unknown_1 = require("unknown");
 unknown_1.foo();
 //// [new.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var unkown_1 = require("unkown");
 new unkown_1.Foo();
 //// [callAny.js]
@@ -106,7 +106,7 @@ var __extends = (this && this.__extends) || (function () {
         d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
     };
 })();
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var unknown_1 = require("unknown");
 var D = (function (_super) {
     __extends(D, _super);
diff --git a/tests/baselines/reference/unusedLocalsAndObjectSpread2.js b/tests/baselines/reference/unusedLocalsAndObjectSpread2.js
index b7d1b8b106faa..d98dda956ebb1 100644
--- a/tests/baselines/reference/unusedLocalsAndObjectSpread2.js
+++ b/tests/baselines/reference/unusedLocalsAndObjectSpread2.js
@@ -27,7 +27,7 @@ var __rest = (this && this.__rest) || function (s, e) {
             t[p[i]] = s[p[i]];
     return t;
 };
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var children = props.children, // here!
 _a = props.active, // here!
 rest = __rest(props, ["children", "active"]);
diff --git a/tests/baselines/reference/unusedLocalsAndParameters.errors.txt b/tests/baselines/reference/unusedLocalsAndParameters.errors.txt
index 2416b29c21691..0144a5f3ea1de 100644
--- a/tests/baselines/reference/unusedLocalsAndParameters.errors.txt
+++ b/tests/baselines/reference/unusedLocalsAndParameters.errors.txt
@@ -4,14 +4,11 @@ tests/cases/compiler/unusedLocalsAndParameters.ts(15,5): error TS6133: 'farrow'
 tests/cases/compiler/unusedLocalsAndParameters.ts(15,15): error TS6133: 'a' is declared but never used.
 tests/cases/compiler/unusedLocalsAndParameters.ts(18,7): error TS6133: 'C' is declared but never used.
 tests/cases/compiler/unusedLocalsAndParameters.ts(20,12): error TS6133: 'a' is declared but never used.
-tests/cases/compiler/unusedLocalsAndParameters.ts(23,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/unusedLocalsAndParameters.ts(23,11): error TS6133: 'v' is declared but never used.
 tests/cases/compiler/unusedLocalsAndParameters.ts(27,5): error TS6133: 'E' is declared but never used.
 tests/cases/compiler/unusedLocalsAndParameters.ts(29,12): error TS6133: 'a' is declared but never used.
-tests/cases/compiler/unusedLocalsAndParameters.ts(32,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/unusedLocalsAndParameters.ts(32,11): error TS6133: 'v' is declared but never used.
 tests/cases/compiler/unusedLocalsAndParameters.ts(38,12): error TS6133: 'a' is declared but never used.
-tests/cases/compiler/unusedLocalsAndParameters.ts(41,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/unusedLocalsAndParameters.ts(41,11): error TS6133: 'v' is declared but never used.
 tests/cases/compiler/unusedLocalsAndParameters.ts(48,10): error TS6133: 'i' is declared but never used.
 tests/cases/compiler/unusedLocalsAndParameters.ts(52,10): error TS6133: 'i' is declared but never used.
@@ -24,7 +21,7 @@ tests/cases/compiler/unusedLocalsAndParameters.ts(79,11): error TS6133: 'N' is d
 tests/cases/compiler/unusedLocalsAndParameters.ts(80,9): error TS6133: 'x' is declared but never used.
 
 
-==== tests/cases/compiler/unusedLocalsAndParameters.ts (24 errors) ====
+==== tests/cases/compiler/unusedLocalsAndParameters.ts (21 errors) ====
     export { };
     
     // function declaration paramter
@@ -60,8 +57,6 @@ tests/cases/compiler/unusedLocalsAndParameters.ts(80,9): error TS6133: 'x' is de
         }
         // Accessor declaration paramter
         set x(v: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
               ~
 !!! error TS6133: 'v' is declared but never used.
         }
@@ -77,8 +72,6 @@ tests/cases/compiler/unusedLocalsAndParameters.ts(80,9): error TS6133: 'x' is de
         }
         // Accessor declaration paramter
         set x(v: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
               ~
 !!! error TS6133: 'v' is declared but never used.
         }
@@ -92,8 +85,6 @@ tests/cases/compiler/unusedLocalsAndParameters.ts(80,9): error TS6133: 'x' is de
         },
         // Accessor declaration paramter
         set x(v: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
               ~
 !!! error TS6133: 'v' is declared but never used.
         }
diff --git a/tests/baselines/reference/unusedLocalsAndParameters.js b/tests/baselines/reference/unusedLocalsAndParameters.js
index eb4db589c5369..aadde3f5e52d3 100644
--- a/tests/baselines/reference/unusedLocalsAndParameters.js
+++ b/tests/baselines/reference/unusedLocalsAndParameters.js
@@ -85,7 +85,7 @@ namespace N {
 
 //// [unusedLocalsAndParameters.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 // function declaration paramter
 function f(a) {
 }
diff --git a/tests/baselines/reference/unusedLocalsAndParametersDeferred.errors.txt b/tests/baselines/reference/unusedLocalsAndParametersDeferred.errors.txt
deleted file mode 100644
index b35487af3e595..0000000000000
--- a/tests/baselines/reference/unusedLocalsAndParametersDeferred.errors.txt
+++ /dev/null
@@ -1,171 +0,0 @@
-tests/cases/compiler/unusedLocalsAndParametersDeferred.ts(41,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/unusedLocalsAndParametersDeferred.ts(64,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/unusedLocalsAndParametersDeferred.ts(86,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/compiler/unusedLocalsAndParametersDeferred.ts (3 errors) ====
-    export { };
-    
-    function defered<T>(a: () => T): T {
-        return a();
-    }
-    
-    // function declaration paramter
-    function f(a) {
-        defered(() => {
-            a;
-        });
-    }
-    f(0);
-    
-    // function expression paramter
-    var fexp = function (a) {
-        defered(() => {
-            a;
-        });
-    };
-    fexp(1);
-    
-    // arrow function paramter
-    var farrow = (a) => {
-        defered(() => {
-            a;
-        });
-    };
-    farrow(2);
-    
-    let prop1;
-    
-    class C {
-        // Method declaration paramter
-        method(a) {
-            defered(() => {
-                a;
-            });
-        }
-        // Accessor declaration paramter
-        set x(v: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            defered(() => {
-                v;
-            });
-        }
-        // in a property initalizer
-        p = defered(() => {
-            prop1;
-        });
-    }
-    
-    new C();
-    
-    let prop2;
-    
-    var E = class {
-        // Method declaration paramter
-        method(a) {
-            defered(() => {
-                a;
-            });
-        }
-        // Accessor declaration paramter
-        set x(v: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            defered(() => {
-                v;
-            });
-        }
-        // in a property initalizer
-        p = defered(() => {
-            prop2;
-        });
-    }
-    
-    new E();
-    
-    
-    var o = {
-        // Object literal method declaration paramter
-        method(a) {
-            defered(() => {
-                a;
-            });
-        },
-        // Accessor declaration paramter
-        set x(v: number) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            defered(() => {
-                v;
-            });
-        },
-        // in a property initalizer
-        p: defered(() => {
-            prop1;
-        })
-    };
-    
-    o;
-    
-    // in a for..in statment
-    for (let i in o) {
-        defered(() => {
-            i;
-        });
-    }
-    
-    // in a for..of statment
-    for (let i of [1,2,3]) {
-        defered(() => {
-            i;
-        });
-    }
-    
-    // in a for. statment
-    for (let i = 0; i < 10; i++) {
-        defered(() => {
-            i;
-        });
-    }
-    
-    // in a block
-    
-    const condition = false;
-    if (condition) {
-        const c = 0;
-        defered(() => {
-            c;
-        });
-    }
-    
-    // in try/catch/finally
-    try {
-        const a = 0;
-        defered(() => {
-            a;
-        });
-    }
-    catch (e) {
-        const c = 1;
-        defered(() => {
-            c;
-        });
-    }
-    finally {
-        const c = 0;
-        defered(() => {
-            c;
-        });
-    }
-    
-    
-    // in a namespace
-    namespace N {
-        var x;
-        defered(() => {
-            x;
-        });
-    }
-    N;
-        
\ No newline at end of file
diff --git a/tests/baselines/reference/unusedLocalsAndParametersDeferred.js b/tests/baselines/reference/unusedLocalsAndParametersDeferred.js
index faa5ad2b0dfe2..ef106fb1f3384 100644
--- a/tests/baselines/reference/unusedLocalsAndParametersDeferred.js
+++ b/tests/baselines/reference/unusedLocalsAndParametersDeferred.js
@@ -161,7 +161,7 @@ N;
 
 //// [unusedLocalsAndParametersDeferred.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function defered(a) {
     return a();
 }
diff --git a/tests/baselines/reference/unusedLocalsAndParametersDeferred.symbols b/tests/baselines/reference/unusedLocalsAndParametersDeferred.symbols
new file mode 100644
index 0000000000000..19da604a12414
--- /dev/null
+++ b/tests/baselines/reference/unusedLocalsAndParametersDeferred.symbols
@@ -0,0 +1,319 @@
+=== tests/cases/compiler/unusedLocalsAndParametersDeferred.ts ===
+export { };
+
+function defered<T>(a: () => T): T {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+>T : Symbol(T, Decl(unusedLocalsAndParametersDeferred.ts, 2, 17))
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 2, 20))
+>T : Symbol(T, Decl(unusedLocalsAndParametersDeferred.ts, 2, 17))
+>T : Symbol(T, Decl(unusedLocalsAndParametersDeferred.ts, 2, 17))
+
+    return a();
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 2, 20))
+}
+
+// function declaration paramter
+function f(a) {
+>f : Symbol(f, Decl(unusedLocalsAndParametersDeferred.ts, 4, 1))
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 7, 11))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        a;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 7, 11))
+
+    });
+}
+f(0);
+>f : Symbol(f, Decl(unusedLocalsAndParametersDeferred.ts, 4, 1))
+
+// function expression paramter
+var fexp = function (a) {
+>fexp : Symbol(fexp, Decl(unusedLocalsAndParametersDeferred.ts, 15, 3))
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 15, 21))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        a;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 15, 21))
+
+    });
+};
+fexp(1);
+>fexp : Symbol(fexp, Decl(unusedLocalsAndParametersDeferred.ts, 15, 3))
+
+// arrow function paramter
+var farrow = (a) => {
+>farrow : Symbol(farrow, Decl(unusedLocalsAndParametersDeferred.ts, 23, 3))
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 23, 14))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        a;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 23, 14))
+
+    });
+};
+farrow(2);
+>farrow : Symbol(farrow, Decl(unusedLocalsAndParametersDeferred.ts, 23, 3))
+
+let prop1;
+>prop1 : Symbol(prop1, Decl(unusedLocalsAndParametersDeferred.ts, 30, 3))
+
+class C {
+>C : Symbol(C, Decl(unusedLocalsAndParametersDeferred.ts, 30, 10))
+
+    // Method declaration paramter
+    method(a) {
+>method : Symbol(C.method, Decl(unusedLocalsAndParametersDeferred.ts, 32, 9))
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 34, 11))
+
+        defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+            a;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 34, 11))
+
+        });
+    }
+    // Accessor declaration paramter
+    set x(v: number) {
+>x : Symbol(C.x, Decl(unusedLocalsAndParametersDeferred.ts, 38, 5))
+>v : Symbol(v, Decl(unusedLocalsAndParametersDeferred.ts, 40, 10))
+
+        defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+            v;
+>v : Symbol(v, Decl(unusedLocalsAndParametersDeferred.ts, 40, 10))
+
+        });
+    }
+    // in a property initalizer
+    p = defered(() => {
+>p : Symbol(C.p, Decl(unusedLocalsAndParametersDeferred.ts, 44, 5))
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        prop1;
+>prop1 : Symbol(prop1, Decl(unusedLocalsAndParametersDeferred.ts, 30, 3))
+
+    });
+}
+
+new C();
+>C : Symbol(C, Decl(unusedLocalsAndParametersDeferred.ts, 30, 10))
+
+let prop2;
+>prop2 : Symbol(prop2, Decl(unusedLocalsAndParametersDeferred.ts, 53, 3))
+
+var E = class {
+>E : Symbol(E, Decl(unusedLocalsAndParametersDeferred.ts, 55, 3))
+
+    // Method declaration paramter
+    method(a) {
+>method : Symbol(E.method, Decl(unusedLocalsAndParametersDeferred.ts, 55, 15))
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 57, 11))
+
+        defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+            a;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 57, 11))
+
+        });
+    }
+    // Accessor declaration paramter
+    set x(v: number) {
+>x : Symbol(E.x, Decl(unusedLocalsAndParametersDeferred.ts, 61, 5))
+>v : Symbol(v, Decl(unusedLocalsAndParametersDeferred.ts, 63, 10))
+
+        defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+            v;
+>v : Symbol(v, Decl(unusedLocalsAndParametersDeferred.ts, 63, 10))
+
+        });
+    }
+    // in a property initalizer
+    p = defered(() => {
+>p : Symbol(E.p, Decl(unusedLocalsAndParametersDeferred.ts, 67, 5))
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        prop2;
+>prop2 : Symbol(prop2, Decl(unusedLocalsAndParametersDeferred.ts, 53, 3))
+
+    });
+}
+
+new E();
+>E : Symbol(E, Decl(unusedLocalsAndParametersDeferred.ts, 55, 3))
+
+
+var o = {
+>o : Symbol(o, Decl(unusedLocalsAndParametersDeferred.ts, 77, 3))
+
+    // Object literal method declaration paramter
+    method(a) {
+>method : Symbol(method, Decl(unusedLocalsAndParametersDeferred.ts, 77, 9))
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 79, 11))
+
+        defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+            a;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 79, 11))
+
+        });
+    },
+    // Accessor declaration paramter
+    set x(v: number) {
+>x : Symbol(x, Decl(unusedLocalsAndParametersDeferred.ts, 83, 6))
+>v : Symbol(v, Decl(unusedLocalsAndParametersDeferred.ts, 85, 10))
+
+        defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+            v;
+>v : Symbol(v, Decl(unusedLocalsAndParametersDeferred.ts, 85, 10))
+
+        });
+    },
+    // in a property initalizer
+    p: defered(() => {
+>p : Symbol(p, Decl(unusedLocalsAndParametersDeferred.ts, 89, 6))
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        prop1;
+>prop1 : Symbol(prop1, Decl(unusedLocalsAndParametersDeferred.ts, 30, 3))
+
+    })
+};
+
+o;
+>o : Symbol(o, Decl(unusedLocalsAndParametersDeferred.ts, 77, 3))
+
+// in a for..in statment
+for (let i in o) {
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 99, 8))
+>o : Symbol(o, Decl(unusedLocalsAndParametersDeferred.ts, 77, 3))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        i;
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 99, 8))
+
+    });
+}
+
+// in a for..of statment
+for (let i of [1,2,3]) {
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 106, 8))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        i;
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 106, 8))
+
+    });
+}
+
+// in a for. statment
+for (let i = 0; i < 10; i++) {
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 113, 8))
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 113, 8))
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 113, 8))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        i;
+>i : Symbol(i, Decl(unusedLocalsAndParametersDeferred.ts, 113, 8))
+
+    });
+}
+
+// in a block
+
+const condition = false;
+>condition : Symbol(condition, Decl(unusedLocalsAndParametersDeferred.ts, 121, 5))
+
+if (condition) {
+>condition : Symbol(condition, Decl(unusedLocalsAndParametersDeferred.ts, 121, 5))
+
+    const c = 0;
+>c : Symbol(c, Decl(unusedLocalsAndParametersDeferred.ts, 123, 9))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        c;
+>c : Symbol(c, Decl(unusedLocalsAndParametersDeferred.ts, 123, 9))
+
+    });
+}
+
+// in try/catch/finally
+try {
+    const a = 0;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 131, 9))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        a;
+>a : Symbol(a, Decl(unusedLocalsAndParametersDeferred.ts, 131, 9))
+
+    });
+}
+catch (e) {
+>e : Symbol(e, Decl(unusedLocalsAndParametersDeferred.ts, 136, 7))
+
+    const c = 1;
+>c : Symbol(c, Decl(unusedLocalsAndParametersDeferred.ts, 137, 9))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        c;
+>c : Symbol(c, Decl(unusedLocalsAndParametersDeferred.ts, 137, 9))
+
+    });
+}
+finally {
+    const c = 0;
+>c : Symbol(c, Decl(unusedLocalsAndParametersDeferred.ts, 143, 9))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        c;
+>c : Symbol(c, Decl(unusedLocalsAndParametersDeferred.ts, 143, 9))
+
+    });
+}
+
+
+// in a namespace
+namespace N {
+>N : Symbol(N, Decl(unusedLocalsAndParametersDeferred.ts, 147, 1))
+
+    var x;
+>x : Symbol(x, Decl(unusedLocalsAndParametersDeferred.ts, 152, 7))
+
+    defered(() => {
+>defered : Symbol(defered, Decl(unusedLocalsAndParametersDeferred.ts, 0, 11))
+
+        x;
+>x : Symbol(x, Decl(unusedLocalsAndParametersDeferred.ts, 152, 7))
+
+    });
+}
+N;
+>N : Symbol(N, Decl(unusedLocalsAndParametersDeferred.ts, 147, 1))
+    
diff --git a/tests/baselines/reference/unusedLocalsAndParametersDeferred.types b/tests/baselines/reference/unusedLocalsAndParametersDeferred.types
new file mode 100644
index 0000000000000..7ce35bf78a081
--- /dev/null
+++ b/tests/baselines/reference/unusedLocalsAndParametersDeferred.types
@@ -0,0 +1,385 @@
+=== tests/cases/compiler/unusedLocalsAndParametersDeferred.ts ===
+export { };
+
+function defered<T>(a: () => T): T {
+>defered : <T>(a: () => T) => T
+>T : T
+>a : () => T
+>T : T
+>T : T
+
+    return a();
+>a() : T
+>a : () => T
+}
+
+// function declaration paramter
+function f(a) {
+>f : (a: any) => void
+>a : any
+
+    defered(() => {
+>defered(() => {        a;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        a;    } : () => void
+
+        a;
+>a : any
+
+    });
+}
+f(0);
+>f(0) : void
+>f : (a: any) => void
+>0 : 0
+
+// function expression paramter
+var fexp = function (a) {
+>fexp : (a: any) => void
+>function (a) {    defered(() => {        a;    });} : (a: any) => void
+>a : any
+
+    defered(() => {
+>defered(() => {        a;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        a;    } : () => void
+
+        a;
+>a : any
+
+    });
+};
+fexp(1);
+>fexp(1) : void
+>fexp : (a: any) => void
+>1 : 1
+
+// arrow function paramter
+var farrow = (a) => {
+>farrow : (a: any) => void
+>(a) => {    defered(() => {        a;    });} : (a: any) => void
+>a : any
+
+    defered(() => {
+>defered(() => {        a;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        a;    } : () => void
+
+        a;
+>a : any
+
+    });
+};
+farrow(2);
+>farrow(2) : void
+>farrow : (a: any) => void
+>2 : 2
+
+let prop1;
+>prop1 : any
+
+class C {
+>C : C
+
+    // Method declaration paramter
+    method(a) {
+>method : (a: any) => void
+>a : any
+
+        defered(() => {
+>defered(() => {            a;        }) : void
+>defered : <T>(a: () => T) => T
+>() => {            a;        } : () => void
+
+            a;
+>a : any
+
+        });
+    }
+    // Accessor declaration paramter
+    set x(v: number) {
+>x : number
+>v : number
+
+        defered(() => {
+>defered(() => {            v;        }) : void
+>defered : <T>(a: () => T) => T
+>() => {            v;        } : () => void
+
+            v;
+>v : number
+
+        });
+    }
+    // in a property initalizer
+    p = defered(() => {
+>p : void
+>defered(() => {        prop1;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        prop1;    } : () => void
+
+        prop1;
+>prop1 : any
+
+    });
+}
+
+new C();
+>new C() : C
+>C : typeof C
+
+let prop2;
+>prop2 : any
+
+var E = class {
+>E : typeof E
+>class {    // Method declaration paramter    method(a) {        defered(() => {            a;        });    }    // Accessor declaration paramter    set x(v: number) {        defered(() => {            v;        });    }    // in a property initalizer    p = defered(() => {        prop2;    });} : typeof E
+
+    // Method declaration paramter
+    method(a) {
+>method : (a: any) => void
+>a : any
+
+        defered(() => {
+>defered(() => {            a;        }) : void
+>defered : <T>(a: () => T) => T
+>() => {            a;        } : () => void
+
+            a;
+>a : any
+
+        });
+    }
+    // Accessor declaration paramter
+    set x(v: number) {
+>x : number
+>v : number
+
+        defered(() => {
+>defered(() => {            v;        }) : void
+>defered : <T>(a: () => T) => T
+>() => {            v;        } : () => void
+
+            v;
+>v : number
+
+        });
+    }
+    // in a property initalizer
+    p = defered(() => {
+>p : void
+>defered(() => {        prop2;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        prop2;    } : () => void
+
+        prop2;
+>prop2 : any
+
+    });
+}
+
+new E();
+>new E() : E
+>E : typeof E
+
+
+var o = {
+>o : { method(a: any): void; x: number; p: void; }
+>{    // Object literal method declaration paramter    method(a) {        defered(() => {            a;        });    },    // Accessor declaration paramter    set x(v: number) {        defered(() => {            v;        });    },    // in a property initalizer    p: defered(() => {        prop1;    })} : { method(a: any): void; x: number; p: void; }
+
+    // Object literal method declaration paramter
+    method(a) {
+>method : (a: any) => void
+>a : any
+
+        defered(() => {
+>defered(() => {            a;        }) : void
+>defered : <T>(a: () => T) => T
+>() => {            a;        } : () => void
+
+            a;
+>a : any
+
+        });
+    },
+    // Accessor declaration paramter
+    set x(v: number) {
+>x : number
+>v : number
+
+        defered(() => {
+>defered(() => {            v;        }) : void
+>defered : <T>(a: () => T) => T
+>() => {            v;        } : () => void
+
+            v;
+>v : number
+
+        });
+    },
+    // in a property initalizer
+    p: defered(() => {
+>p : void
+>defered(() => {        prop1;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        prop1;    } : () => void
+
+        prop1;
+>prop1 : any
+
+    })
+};
+
+o;
+>o : { method(a: any): void; x: number; p: void; }
+
+// in a for..in statment
+for (let i in o) {
+>i : string
+>o : { method(a: any): void; x: number; p: void; }
+
+    defered(() => {
+>defered(() => {        i;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        i;    } : () => void
+
+        i;
+>i : string
+
+    });
+}
+
+// in a for..of statment
+for (let i of [1,2,3]) {
+>i : number
+>[1,2,3] : number[]
+>1 : 1
+>2 : 2
+>3 : 3
+
+    defered(() => {
+>defered(() => {        i;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        i;    } : () => void
+
+        i;
+>i : number
+
+    });
+}
+
+// in a for. statment
+for (let i = 0; i < 10; i++) {
+>i : number
+>0 : 0
+>i < 10 : boolean
+>i : number
+>10 : 10
+>i++ : number
+>i : number
+
+    defered(() => {
+>defered(() => {        i;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        i;    } : () => void
+
+        i;
+>i : number
+
+    });
+}
+
+// in a block
+
+const condition = false;
+>condition : false
+>false : false
+
+if (condition) {
+>condition : false
+
+    const c = 0;
+>c : 0
+>0 : 0
+
+    defered(() => {
+>defered(() => {        c;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        c;    } : () => void
+
+        c;
+>c : 0
+
+    });
+}
+
+// in try/catch/finally
+try {
+    const a = 0;
+>a : 0
+>0 : 0
+
+    defered(() => {
+>defered(() => {        a;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        a;    } : () => void
+
+        a;
+>a : 0
+
+    });
+}
+catch (e) {
+>e : any
+
+    const c = 1;
+>c : 1
+>1 : 1
+
+    defered(() => {
+>defered(() => {        c;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        c;    } : () => void
+
+        c;
+>c : 1
+
+    });
+}
+finally {
+    const c = 0;
+>c : 0
+>0 : 0
+
+    defered(() => {
+>defered(() => {        c;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        c;    } : () => void
+
+        c;
+>c : 0
+
+    });
+}
+
+
+// in a namespace
+namespace N {
+>N : typeof N
+
+    var x;
+>x : any
+
+    defered(() => {
+>defered(() => {        x;    }) : void
+>defered : <T>(a: () => T) => T
+>() => {        x;    } : () => void
+
+        x;
+>x : any
+
+    });
+}
+N;
+>N : typeof N
+    
diff --git a/tests/baselines/reference/unusedLocalsAndParametersOverloadSignatures.js b/tests/baselines/reference/unusedLocalsAndParametersOverloadSignatures.js
index 559a2cb7761e8..2b7796cbe8e15 100644
--- a/tests/baselines/reference/unusedLocalsAndParametersOverloadSignatures.js
+++ b/tests/baselines/reference/unusedLocalsAndParametersOverloadSignatures.js
@@ -24,7 +24,7 @@ export function genericFunc(details: number, message: any): any {
 
 //// [unusedLocalsAndParametersOverloadSignatures.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function func(details, message) {
     return details + message;
 }
diff --git a/tests/baselines/reference/unusedLocalsAndParametersTypeAliases.js b/tests/baselines/reference/unusedLocalsAndParametersTypeAliases.js
index f800d30b71d6a..34b1948bea3e4 100644
--- a/tests/baselines/reference/unusedLocalsAndParametersTypeAliases.js
+++ b/tests/baselines/reference/unusedLocalsAndParametersTypeAliases.js
@@ -28,7 +28,7 @@ y[0]();
 
 //// [unusedLocalsAndParametersTypeAliases.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
 x();
 var y;
diff --git a/tests/baselines/reference/unusedLocalsAndParametersTypeAliases2.js b/tests/baselines/reference/unusedLocalsAndParametersTypeAliases2.js
index 59f3af5c21b33..4df643c3ea6a2 100644
--- a/tests/baselines/reference/unusedLocalsAndParametersTypeAliases2.js
+++ b/tests/baselines/reference/unusedLocalsAndParametersTypeAliases2.js
@@ -12,7 +12,7 @@ export {}
 
 //// [unusedLocalsAndParametersTypeAliases2.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function foo() {
     foo();
 }
diff --git a/tests/baselines/reference/unusedVariablesinModules1.js b/tests/baselines/reference/unusedVariablesinModules1.js
index 474145c633600..e51f676f203f8 100644
--- a/tests/baselines/reference/unusedVariablesinModules1.js
+++ b/tests/baselines/reference/unusedVariablesinModules1.js
@@ -7,5 +7,5 @@ export var y: string;
 
 //// [unusedVariablesinModules1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var x;
diff --git a/tests/baselines/reference/varArgsOnConstructorTypes.js b/tests/baselines/reference/varArgsOnConstructorTypes.js
index 9c790e7a48bbf..179a402b3d3e5 100644
--- a/tests/baselines/reference/varArgsOnConstructorTypes.js
+++ b/tests/baselines/reference/varArgsOnConstructorTypes.js
@@ -37,7 +37,7 @@ var __extends = (this && this.__extends) || (function () {
 })();
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A(ctor) {
         }
diff --git a/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js b/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js
index 1eab90467d486..6cc4e4951198f 100644
--- a/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js
+++ b/tests/baselines/reference/visibilityOfCrossModuleTypeUsage.js
@@ -27,14 +27,14 @@ function run(configuration: commands.IConfiguration) {
 
 //// [visibilityOfCrossModuleTypeUsage_server.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [visibilityOfCrossModuleTypeUsage_commands.js]
 "use strict";
 //visibilityOfCrossModuleTypeUsage
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 //// [visibilityOfCrossModuleTypeUsage_fs.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function run(configuration) {
     var absoluteWorkspacePath = configuration.workspace.toAbsolutePath(configuration.server);
 }
diff --git a/tests/baselines/reference/visibilityOfTypeParameters.js b/tests/baselines/reference/visibilityOfTypeParameters.js
index 3a1adf3f97d35..9a2aaf0cc8c05 100644
--- a/tests/baselines/reference/visibilityOfTypeParameters.js
+++ b/tests/baselines/reference/visibilityOfTypeParameters.js
@@ -7,7 +7,7 @@ export class MyClass {
 
 //// [visibilityOfTypeParameters.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 var MyClass = (function () {
     function MyClass() {
     }
diff --git a/tests/baselines/reference/voidAsNonAmbiguousReturnType.js b/tests/baselines/reference/voidAsNonAmbiguousReturnType.js
index 4883f840ddbae..cd7b873961d1d 100644
--- a/tests/baselines/reference/voidAsNonAmbiguousReturnType.js
+++ b/tests/baselines/reference/voidAsNonAmbiguousReturnType.js
@@ -15,12 +15,12 @@ function main() {
 
 //// [voidAsNonAmbiguousReturnType_0.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 function mkdirSync(path, mode) { }
 exports.mkdirSync = mkdirSync;
 //// [voidAsNonAmbiguousReturnType_1.js]
 "use strict";
-exports.__esModule = true;
+Object.defineProperty(exports, "__esModule", { value: true });
 ///<reference path='voidAsNonAmbiguousReturnType_0.ts'/>
 var fs = require("./voidAsNonAmbiguousReturnType_0");
 function main() {
diff --git a/tests/baselines/reference/withExportDecl.js b/tests/baselines/reference/withExportDecl.js
index 97d528ecd62f6..bfffe54332e3c 100644
--- a/tests/baselines/reference/withExportDecl.js
+++ b/tests/baselines/reference/withExportDecl.js
@@ -61,7 +61,7 @@ export var eVar3 = 10, eVar4, eVar5;
 //// [withExportDecl.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var simpleVar;
     var anotherVar;
     var varWithSimpleType;
diff --git a/tests/baselines/reference/withImportDecl.js b/tests/baselines/reference/withImportDecl.js
index f0a1a2d2f148d..c43f02ac1e112 100644
--- a/tests/baselines/reference/withImportDecl.js
+++ b/tests/baselines/reference/withImportDecl.js
@@ -46,7 +46,7 @@ b.foo;
 //// [withImportDecl_0.js]
 define(["require", "exports"], function (require, exports) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     var A = (function () {
         function A() {
         }
@@ -57,7 +57,7 @@ define(["require", "exports"], function (require, exports) {
 //// [withImportDecl_1.js]
 define(["require", "exports", "withImportDecl_0"], function (require, exports, m3) {
     "use strict";
-    exports.__esModule = true;
+    Object.defineProperty(exports, "__esModule", { value: true });
     ///<reference path='withImportDecl_0.ts'/>
     var simpleVar;
     var anotherVar;