diff --git a/compiler/test/dotty/tools/dotc/CompilationTests.scala b/compiler/test/dotty/tools/dotc/CompilationTests.scala
index 0b9063474e62..95b5362d77c0 100644
--- a/compiler/test/dotty/tools/dotc/CompilationTests.scala
+++ b/compiler/test/dotty/tools/dotc/CompilationTests.scala
@@ -216,8 +216,6 @@ class CompilationTests {
   @Test def checkInitGlobal: Unit = {
     implicit val testGroup: TestGroup = TestGroup("checkInitGlobal")
     val options = defaultOptions.and("-Ysafe-init-global", "-Xfatal-warnings")
-    compileFilesInDir("tests/init-global/neg", options).checkExpectedErrors()
-    compileFilesInDir("tests/init-global/pos", options).checkCompile()
     compileFilesInDir("tests/init-global/neg", options, FileFilter.exclude(TestSources.negInitGlobalScala2LibraryTastyBlacklisted)).checkExpectedErrors()
     compileFilesInDir("tests/init-global/warn", defaultOptions.and("-Ysafe-init-global"), FileFilter.exclude(TestSources.negInitGlobalScala2LibraryTastyBlacklisted)).checkWarnings()
     compileFilesInDir("tests/init-global/pos", options, FileFilter.exclude(TestSources.posInitGlobalScala2LibraryTastyBlacklisted)).checkCompile()
diff --git a/tests/neg-scalajs/enumeration-warnings.check b/tests/neg-scalajs/enumeration-warnings.check
index 5d791be5928a..b356a150daa5 100644
--- a/tests/neg-scalajs/enumeration-warnings.check
+++ b/tests/neg-scalajs/enumeration-warnings.check
@@ -1,61 +1,60 @@
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:6:4 -----------------------------------------------------------
-6 |    Value // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:6:4 -------------------------------------------------------------
+6 |    Value // error
   |    ^^^^^
   |    Could not transform call to scala.Enumeration.Value.
   |    The resulting program is unlikely to function properly as this operation requires reflection.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:10:9 ----------------------------------------------------------
-10 |    Value(4) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:10:9 ------------------------------------------------------------
+10 |    Value(4) // error
    |    ^^^^^^^^
    |    Could not transform call to scala.Enumeration.Value.
    |    The resulting program is unlikely to function properly as this operation requires reflection.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:15:15 ---------------------------------------------------------
-15 |  val a = Value(null) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:15:15 -----------------------------------------------------------
+15 |  val a = Value(null) // error
    |          ^^^^^^^^^^^
    |          Passing null as name to scala.Enumeration.Value requires reflection at run-time.
    |          The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:16:15 ---------------------------------------------------------
-16 |  val b = Value(10, null) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:16:15 -----------------------------------------------------------
+16 |  val b = Value(10, null) // error
    |          ^^^^^^^^^^^^^^^
    |          Passing null as name to scala.Enumeration.Value requires reflection at run-time.
    |          The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:20:10 ---------------------------------------------------------
-20 |  val a = new Val // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:20:10 -----------------------------------------------------------
+20 |  val a = new Val // error
    |          ^^^^^^^
    |          Calls to the non-string constructors of scala.Enumeration.Val require reflection at run-time.
    |          The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:21:10 ---------------------------------------------------------
-21 |  val b = new Val(10) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:21:10 -----------------------------------------------------------
+21 |  val b = new Val(10) // error
    |          ^^^^^^^^^^^
    |          Calls to the non-string constructors of scala.Enumeration.Val require reflection at run-time.
    |          The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:25:10 ---------------------------------------------------------
-25 |  val a = new Val(null) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:25:10 -----------------------------------------------------------
+25 |  val a = new Val(null) // error
    |          ^^^^^^^^^^^^^
    |          Passing null as name to a constructor of scala.Enumeration.Val requires reflection at run-time.
    |          The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:26:10 ---------------------------------------------------------
-26 |  val b = new Val(10, null) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:26:10 -----------------------------------------------------------
+26 |  val b = new Val(10, null) // error
    |          ^^^^^^^^^^^^^^^^^
    |          Passing null as name to a constructor of scala.Enumeration.Val requires reflection at run-time.
    |          The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:30:31 ---------------------------------------------------------
-30 |  protected class Val1 extends Val // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:30:31 -----------------------------------------------------------
+30 |  protected class Val1 extends Val // error
    |                               ^^^
    |                   Calls to the non-string constructors of scala.Enumeration.Val require reflection at run-time.
    |                   The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:31:31 ---------------------------------------------------------
-31 |  protected class Val2 extends Val(1) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:31:31 -----------------------------------------------------------
+31 |  protected class Val2 extends Val(1) // error
    |                               ^^^^^^
    |                   Calls to the non-string constructors of scala.Enumeration.Val require reflection at run-time.
    |                   The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:35:31 ---------------------------------------------------------
-35 |  protected class Val1 extends Val(null) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:35:31 -----------------------------------------------------------
+35 |  protected class Val1 extends Val(null) // error
    |                               ^^^^^^^^^
    |                 Passing null as name to a constructor of scala.Enumeration.Val requires reflection at run-time.
    |                 The resulting program is unlikely to function properly.
--- Warning: tests/neg-scalajs/enumeration-warnings.scala:36:31 ---------------------------------------------------------
-36 |  protected class Val2 extends Val(1, null) // warn
+-- Error: tests/neg-scalajs/enumeration-warnings.scala:36:31 -----------------------------------------------------------
+36 |  protected class Val2 extends Val(1, null) // error
    |                               ^^^^^^^^^^^^
    |                 Passing null as name to a constructor of scala.Enumeration.Val requires reflection at run-time.
    |                 The resulting program is unlikely to function properly.
-No warnings can be incurred under -Werror.
diff --git a/tests/neg-scalajs/enumeration-warnings.scala b/tests/neg-scalajs/enumeration-warnings.scala
index 10536fef4ba6..b48ffc9500e3 100644
--- a/tests/neg-scalajs/enumeration-warnings.scala
+++ b/tests/neg-scalajs/enumeration-warnings.scala
@@ -3,37 +3,35 @@
 class UnableToTransformValue extends Enumeration {
   val a = {
     println("oh, oh!")
-    Value // warn
+    Value // error
   }
   val b = {
     println("oh, oh!")
-    Value(4) // warn
+    Value(4) // error
   }
 }
 
 class ValueWithNullName extends Enumeration {
-  val a = Value(null) // warn
-  val b = Value(10, null) // warn
+  val a = Value(null) // error
+  val b = Value(10, null) // error
 }
 
 class NewValWithNoName extends Enumeration {
-  val a = new Val // warn
-  val b = new Val(10) // warn
+  val a = new Val // error
+  val b = new Val(10) // error
 }
 
 class NewValWithNullName extends Enumeration {
-  val a = new Val(null) // warn
-  val b = new Val(10, null) // warn
+  val a = new Val(null) // error
+  val b = new Val(10, null) // error
 }
 
 class ExtendsValWithNoName extends Enumeration {
-  protected class Val1 extends Val // warn
-  protected class Val2 extends Val(1) // warn
+  protected class Val1 extends Val // error
+  protected class Val2 extends Val(1) // error
 }
 
 class ExtendsValWithNullName extends Enumeration {
-  protected class Val1 extends Val(null) // warn
-  protected class Val2 extends Val(1, null) // warn
+  protected class Val1 extends Val(null) // error
+  protected class Val2 extends Val(1, null) // error
 }
-
-// nopos-error: No warnings can be incurred under -Werror.
diff --git a/tests/patmat/i14407.dupe.check b/tests/patmat/i14407.dupe.check
index e6f742314d98..b0605bcd95e5 100644
--- a/tests/patmat/i14407.dupe.check
+++ b/tests/patmat/i14407.dupe.check
@@ -1,2 +1 @@
 6: Match case Unreachable
-0: No Kind
diff --git a/tests/run/getclass.check b/tests/run/getclass.check
index f5f412ab2edc..ea73f6127c8f 100644
--- a/tests/run/getclass.check
+++ b/tests/run/getclass.check
@@ -22,5 +22,5 @@ class [D
 class [Lscala.collection.immutable.List;
 
 Functions:
-class Test$$$Lambda/
-class Test$$$Lambda/
+class Test$$$Lambda$
+class Test$$$Lambda$