diff --git a/packages/context/src/binding.ts b/packages/context/src/binding.ts
index 67a2a1b1b34b..1b4c05fd5ae3 100644
--- a/packages/context/src/binding.ts
+++ b/packages/context/src/binding.ts
@@ -6,7 +6,7 @@
 import {Context} from './context';
 import {ResolutionSession} from './resolution-session';
 import {Constructor, instantiateClass} from './resolver';
-import {isPromise, BoundValue, ValueOrPromise} from './value-promise';
+import {isPromise, BoundValue} from './value-promise';
 import {Provider} from './provider';
 
 import * as debugModule from 'debug';
diff --git a/packages/context/src/inject.ts b/packages/context/src/inject.ts
index 006f24ca2495..5e647c02bb42 100644
--- a/packages/context/src/inject.ts
+++ b/packages/context/src/inject.ts
@@ -10,12 +10,7 @@ import {
   PropertyDecoratorFactory,
   MetadataMap,
 } from '@loopback/metadata';
-import {
-  BoundValue,
-  ValueOrPromise,
-  isPromise,
-  resolveList,
-} from './value-promise';
+import {BoundValue, ValueOrPromise, resolveList} from './value-promise';
 import {Context} from './context';
 import {ResolutionSession} from './resolution-session';
 
diff --git a/packages/context/src/resolution-session.ts b/packages/context/src/resolution-session.ts
index aa13a1e0d86b..be0c01d63c6b 100644
--- a/packages/context/src/resolution-session.ts
+++ b/packages/context/src/resolution-session.ts
@@ -5,12 +5,7 @@
 
 import {Binding} from './binding';
 import {Injection} from './inject';
-import {
-  isPromise,
-  ValueOrPromise,
-  BoundValue,
-  tryWithFinally,
-} from './value-promise';
+import {ValueOrPromise, BoundValue, tryWithFinally} from './value-promise';
 import * as debugModule from 'debug';
 import {DecoratorFactory} from '@loopback/metadata';
 
diff --git a/packages/context/test/unit/value-promise.test.ts b/packages/context/test/unit/value-promise.test.ts
index e93ebdc4f4f2..7aced6c2de8f 100644
--- a/packages/context/test/unit/value-promise.test.ts
+++ b/packages/context/test/unit/value-promise.test.ts
@@ -4,14 +4,7 @@
 // License text available at https://opensource.org/licenses/MIT
 
 import {expect} from '@loopback/testlab';
-import {
-  BoundValue,
-  ValueOrPromise,
-  resolveList,
-  resolveMap,
-  tryWithFinally,
-  getDeepProperty,
-} from '../..';
+import {resolveList, resolveMap, tryWithFinally, getDeepProperty} from '../..';
 
 describe('tryWithFinally', () => {
   it('performs final action for a fulfilled promise', async () => {
diff --git a/packages/example-getting-started/src/application.ts b/packages/example-getting-started/src/application.ts
index 1ae03dcb9849..f0d2df88dbfc 100644
--- a/packages/example-getting-started/src/application.ts
+++ b/packages/example-getting-started/src/application.ts
@@ -11,12 +11,7 @@ import {db} from './datasources/db.datasource';
 /* tslint:disable:no-unused-imports */
 // Class and Repository imports required to infer types in consuming code!
 // Do not remove them!
-import {
-  Class,
-  Repository,
-  DataSourceConstructor,
-  RepositoryMixin,
-} from '@loopback/repository';
+import {DataSourceConstructor, RepositoryMixin} from '@loopback/repository';
 /* tslint:enable:no-unused-imports */
 export class TodoApplication extends RepositoryMixin(RestApplication) {
   constructor(options?: ApplicationConfig) {
diff --git a/packages/example-getting-started/src/datasources/db.datasource.ts b/packages/example-getting-started/src/datasources/db.datasource.ts
index de60ca796c71..1895beee52f4 100644
--- a/packages/example-getting-started/src/datasources/db.datasource.ts
+++ b/packages/example-getting-started/src/datasources/db.datasource.ts
@@ -7,7 +7,7 @@ import * as path from 'path';
 // The juggler reference must exist for consuming code to correctly infer
 // type info used in the "db" export (contained in DataSourceConstructor).
 /* tslint:disable-next-line:no-unused-imports */
-import {juggler, DataSourceConstructor} from '@loopback/repository';
+import {DataSourceConstructor} from '@loopback/repository';
 
 const dsConfigPath = path.resolve(
   __dirname,
diff --git a/packages/example-hello-world/src/application.ts b/packages/example-hello-world/src/application.ts
index 090e046d8be4..bfa570c88383 100644
--- a/packages/example-hello-world/src/application.ts
+++ b/packages/example-hello-world/src/application.ts
@@ -3,7 +3,6 @@
 // This file is licensed under the MIT License.
 // License text available at https://opensource.org/licenses/MIT
 
-import {Application} from '@loopback/core';
 import {RestApplication, RestServer} from '@loopback/rest';
 
 export class HelloWorldApplication extends RestApplication {
diff --git a/packages/openapi-v2/src/controller-spec.ts b/packages/openapi-v2/src/controller-spec.ts
index c8f49432376c..1d9a885c742d 100644
--- a/packages/openapi-v2/src/controller-spec.ts
+++ b/packages/openapi-v2/src/controller-spec.ts
@@ -22,7 +22,6 @@ import {
   ItemType,
   ItemsObject,
   DefinitionsObject,
-  MapObject,
 } from '@loopback/openapi-spec';
 
 import * as stream from 'stream';
diff --git a/packages/repository-json-schema/src/build-schema.ts b/packages/repository-json-schema/src/build-schema.ts
index 3e3b6026c18c..fadfa234c1b4 100644
--- a/packages/repository-json-schema/src/build-schema.ts
+++ b/packages/repository-json-schema/src/build-schema.ts
@@ -145,7 +145,6 @@ export function modelToJsonSchema(ctor: Function): JsonDefinition {
     result.properties = result.properties || {};
     result.properties[p] = result.properties[p] || {};
 
-    const property = result.properties[p];
     const metaProperty = meta.properties[p];
     const metaType = metaProperty.type;
 
diff --git a/packages/testlab/src/test-sandbox.ts b/packages/testlab/src/test-sandbox.ts
index ac24b6820a10..21732a10c7d3 100644
--- a/packages/testlab/src/test-sandbox.ts
+++ b/packages/testlab/src/test-sandbox.ts
@@ -3,10 +3,7 @@
 // This file is licensed under the MIT License.
 // License text available at https://opensource.org/licenses/MIT
 
-import {tmpdir} from 'os';
-import {createHash} from 'crypto';
-import {resolve, join, parse} from 'path';
-import * as util from 'util';
+import {resolve, parse} from 'path';
 import {copy, ensureDirSync, emptyDir, remove, ensureDir} from 'fs-extra';
 
 /**
diff --git a/packages/testlab/test/integration/test-sandbox.integration.ts b/packages/testlab/test/integration/test-sandbox.integration.ts
index 94ad67e0a1d8..8cb75c069bcc 100644
--- a/packages/testlab/test/integration/test-sandbox.integration.ts
+++ b/packages/testlab/test/integration/test-sandbox.integration.ts
@@ -5,8 +5,6 @@
 
 import {TestSandbox, expect} from '../..';
 import {resolve} from 'path';
-import {createHash} from 'crypto';
-import * as util from 'util';
 import {remove, pathExists, readFile} from 'fs-extra';
 
 describe('TestSandbox integration tests', () => {
diff --git a/tslint.json b/tslint.json
index a84597d6107a..8ffc9a4d90c7 100644
--- a/tslint.json
+++ b/tslint.json
@@ -1,6 +1,6 @@
 {
   "$schema": "http://json.schemastore.org/tslint",
-  "extends": ["./packages/build/config/tslint.common.json"],
+  "extends": ["./packages/build/config/tslint.build.json"],
   "linterOptions": {
     "exclude": ["./packages/cli/generators/*/templates/**/*"]
   }