diff --git a/pkg/front_end/testcases/patterns/boolean_literal_inside_case.dart b/pkg/front_end/testcases/patterns/boolean_literal_inside_case.dart
index 2010c5543df..c993f981102 100644
--- a/pkg/front_end/testcases/patterns/boolean_literal_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/boolean_literal_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case true:
diff --git a/pkg/front_end/testcases/patterns/boolean_literal_inside_cast.dart b/pkg/front_end/testcases/patterns/boolean_literal_inside_cast.dart
index 33dadd4d003..e066093ddfc 100644
--- a/pkg/front_end/testcases/patterns/boolean_literal_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/boolean_literal_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case true as Object:
diff --git a/pkg/front_end/testcases/patterns/boolean_literal_inside_if_case.dart b/pkg/front_end/testcases/patterns/boolean_literal_inside_if_case.dart
index 0bc9844a38d..284e66cf72d 100644
--- a/pkg/front_end/testcases/patterns/boolean_literal_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/boolean_literal_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case true) {}
 }
diff --git a/pkg/front_end/testcases/patterns/boolean_literal_inside_null_assert.dart b/pkg/front_end/testcases/patterns/boolean_literal_inside_null_assert.dart
index da66dd092d2..fd41e9f1208 100644
--- a/pkg/front_end/testcases/patterns/boolean_literal_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/boolean_literal_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case true!:
diff --git a/pkg/front_end/testcases/patterns/boolean_literal_inside_null_check.dart b/pkg/front_end/testcases/patterns/boolean_literal_inside_null_check.dart
index bcc27cc10c3..6d0014fba32 100644
--- a/pkg/front_end/testcases/patterns/boolean_literal_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/boolean_literal_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case true?:
diff --git a/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideIfStatement.dart b/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideIfStatement.dart
index f1abcf19f72..15c384e8219 100644
--- a/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideIfStatement.dart
+++ b/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideIfStatement.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 void f(x) {
   if (x case 0 when true) {}
 }
diff --git a/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideSwitchStatement.dart b/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideSwitchStatement.dart
index b67821123be..eb24b2bcb62 100644
--- a/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideSwitchStatement.dart
+++ b/pkg/front_end/testcases/patterns/caseHead_withClassicPattern_guarded_insideSwitchStatement.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 void f(x) {
   switch (x) {
     case 0 when true:
diff --git a/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideIfStatement.dart b/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideIfStatement.dart
index 833315c835a..1c84773ef66 100644
--- a/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideIfStatement.dart
+++ b/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideIfStatement.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 void f(x) {
   if (x case 0 as int when true) {}
 }
diff --git a/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideSwitchStatement.dart b/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideSwitchStatement.dart
index 7db6d2fdcb0..32f5103125a 100644
--- a/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideSwitchStatement.dart
+++ b/pkg/front_end/testcases/patterns/caseHead_withNewPattern_guarded_insideSwitchStatement.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 void f(x) {
   switch (x) {
     case 0 as int when true:
diff --git a/pkg/front_end/testcases/patterns/cast_inside_case.dart b/pkg/front_end/testcases/patterns/cast_inside_case.dart
index 839b1e9e1b1..2e12b6eb5e8 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   switch (x) {
diff --git a/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern.dart b/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern.dart
index 94c2849eecd..bd598e763ae 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern_implicitly_named.dart
index 0a0628f23b7..df8ee4f0a75 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_extractor_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/cast_inside_if_case.dart b/pkg/front_end/testcases/patterns/cast_inside_if_case.dart
index 24b9975d479..9a7bb1dc753 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case var y as int) {}
 }
diff --git a/pkg/front_end/testcases/patterns/cast_inside_list_pattern.dart b/pkg/front_end/testcases/patterns/cast_inside_list_pattern.dart
index b14e897ea19..5ca99bb3a48 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_list_pattern.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_list_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [1 as int]:
diff --git a/pkg/front_end/testcases/patterns/cast_inside_logical_and_lhs.dart b/pkg/front_end/testcases/patterns/cast_inside_logical_and_lhs.dart
index b2351ce0dd4..d5f7c35f929 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_logical_and_lhs.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_logical_and_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ as double? & Object? _:
diff --git a/pkg/front_end/testcases/patterns/cast_inside_logical_and_rhs.dart b/pkg/front_end/testcases/patterns/cast_inside_logical_and_rhs.dart
index 6c32b0e84cc..ea74e6843ff 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_logical_and_rhs.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_logical_and_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ & double? _ as Object?:
diff --git a/pkg/front_end/testcases/patterns/cast_inside_logical_or_lhs.dart b/pkg/front_end/testcases/patterns/cast_inside_logical_or_lhs.dart
index ad7bc01a32d..1bd6ce4adcc 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_logical_or_lhs.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_logical_or_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ as double? | Object? _:
diff --git a/pkg/front_end/testcases/patterns/cast_inside_logical_or_rhs.dart b/pkg/front_end/testcases/patterns/cast_inside_logical_or_rhs.dart
index 73dc2fbb0f7..4ccd0667497 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_logical_or_rhs.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_logical_or_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ | double? _ as Object?:
diff --git a/pkg/front_end/testcases/patterns/cast_inside_map_pattern.dart b/pkg/front_end/testcases/patterns/cast_inside_map_pattern.dart
index 0b2a7c27898..62730dff14b 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_map_pattern.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_map_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': 1 as int}:
diff --git a/pkg/front_end/testcases/patterns/cast_inside_parenthesized_pattern.dart b/pkg/front_end/testcases/patterns/cast_inside_parenthesized_pattern.dart
index 00aa8e367ad..e611b9b24fe 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_parenthesized_pattern.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_parenthesized_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1 as int):
diff --git a/pkg/front_end/testcases/patterns/cast_inside_record_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/cast_inside_record_pattern_implicitly_named.dart
index a0acf48c815..b3ea62f235b 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_record_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_record_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (: var n as int, 2):
diff --git a/pkg/front_end/testcases/patterns/cast_inside_record_pattern_named.dart b/pkg/front_end/testcases/patterns/cast_inside_record_pattern_named.dart
index 7683724316f..a3cecc44cdd 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_record_pattern_named.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_record_pattern_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (n: 1 as int, 2):
diff --git a/pkg/front_end/testcases/patterns/cast_inside_record_pattern_unnamed.dart b/pkg/front_end/testcases/patterns/cast_inside_record_pattern_unnamed.dart
index 363ae75e7f3..808ed7d53c0 100644
--- a/pkg/front_end/testcases/patterns/cast_inside_record_pattern_unnamed.dart
+++ b/pkg/front_end/testcases/patterns/cast_inside_record_pattern_unnamed.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1 as int, 2):
diff --git a/pkg/front_end/testcases/patterns/constant_identifier_inside_case.dart b/pkg/front_end/testcases/patterns/constant_identifier_inside_case.dart
index bbf32b5a571..3fc520b41d7 100644
--- a/pkg/front_end/testcases/patterns/constant_identifier_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/constant_identifier_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   switch (x) {
diff --git a/pkg/front_end/testcases/patterns/constant_identifier_inside_cast.dart b/pkg/front_end/testcases/patterns/constant_identifier_inside_cast.dart
index 06346a3986c..c7a00781393 100644
--- a/pkg/front_end/testcases/patterns/constant_identifier_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/constant_identifier_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   switch (x) {
diff --git a/pkg/front_end/testcases/patterns/constant_identifier_inside_if_case.dart b/pkg/front_end/testcases/patterns/constant_identifier_inside_if_case.dart
index e57dd1cc302..3c384d469b4 100644
--- a/pkg/front_end/testcases/patterns/constant_identifier_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/constant_identifier_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   if (x case y) {}
diff --git a/pkg/front_end/testcases/patterns/constant_identifier_inside_null_assert.dart b/pkg/front_end/testcases/patterns/constant_identifier_inside_null_assert.dart
index 551a532fe47..abb35c7ee06 100644
--- a/pkg/front_end/testcases/patterns/constant_identifier_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/constant_identifier_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   switch (x) {
diff --git a/pkg/front_end/testcases/patterns/constant_identifier_inside_null_check.dart b/pkg/front_end/testcases/patterns/constant_identifier_inside_null_check.dart
index 642f1e74664..ed492088d1a 100644
--- a/pkg/front_end/testcases/patterns/constant_identifier_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/constant_identifier_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   switch (x) {
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart
index 6e2109d493d..9aff584431b 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1.0:
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.expect b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.expect
index b2f8564181d..75624eafbd5 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.expect
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:3:10: Error: Case expression '1.0' does not have a primitive operator '=='.
+// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:7:10: Error: Case expression '1.0' does not have a primitive operator '=='.
 //     case 1.0:
 //          ^
 //
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.transformed.expect b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.transformed.expect
index b2f8564181d..75624eafbd5 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.strong.transformed.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:3:10: Error: Case expression '1.0' does not have a primitive operator '=='.
+// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:7:10: Error: Case expression '1.0' does not have a primitive operator '=='.
 //     case 1.0:
 //          ^
 //
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.expect b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.expect
index b2f8564181d..75624eafbd5 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.expect
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:3:10: Error: Case expression '1.0' does not have a primitive operator '=='.
+// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:7:10: Error: Case expression '1.0' does not have a primitive operator '=='.
 //     case 1.0:
 //          ^
 //
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.modular.expect b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.modular.expect
index b2f8564181d..75624eafbd5 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.modular.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:3:10: Error: Case expression '1.0' does not have a primitive operator '=='.
+// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:7:10: Error: Case expression '1.0' does not have a primitive operator '=='.
 //     case 1.0:
 //          ^
 //
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.transformed.expect b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.transformed.expect
index b2f8564181d..75624eafbd5 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_case.dart.weak.transformed.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:3:10: Error: Case expression '1.0' does not have a primitive operator '=='.
+// pkg/front_end/testcases/patterns/double_literal_inside_case.dart:7:10: Error: Case expression '1.0' does not have a primitive operator '=='.
 //     case 1.0:
 //          ^
 //
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_cast.dart b/pkg/front_end/testcases/patterns/double_literal_inside_cast.dart
index 1499eab3686..b33056da538 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1.0 as Object:
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_if_case.dart b/pkg/front_end/testcases/patterns/double_literal_inside_if_case.dart
index 5ddadfdc0a1..18e9c89aae9 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case 1.0) {}
 }
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_null_assert.dart b/pkg/front_end/testcases/patterns/double_literal_inside_null_assert.dart
index c310c19fd00..0f4b060f905 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1.0!:
diff --git a/pkg/front_end/testcases/patterns/double_literal_inside_null_check.dart b/pkg/front_end/testcases/patterns/double_literal_inside_null_check.dart
index afd0901e689..7edfbda578c 100644
--- a/pkg/front_end/testcases/patterns/double_literal_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/double_literal_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1.0?:
diff --git a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart
index fd3b2e617fa..bb0452147a6 100644
--- a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart
+++ b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 f() {
   try {
     true ?  : 2;
diff --git a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.expect b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.expect
index feef5e00e49..c4209c6333b 100644
--- a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.expect
+++ b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: Expected an identifier, but got ':'.
+// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: Expected an identifier, but got ':'.
 // Try inserting an identifier before ':'.
 //     true ?  : 2;
 //             ^
@@ -12,7 +12,7 @@ import "dart:core" as core;
 
 static method f() → dynamic {
   try {
-    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: This couldn't be parsed.
+    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: This couldn't be parsed.
     true ?  : 2;
             ^" : 2;
   }
diff --git a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.transformed.expect b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.transformed.expect
index feef5e00e49..c4209c6333b 100644
--- a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.transformed.expect
+++ b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.strong.transformed.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: Expected an identifier, but got ':'.
+// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: Expected an identifier, but got ':'.
 // Try inserting an identifier before ':'.
 //     true ?  : 2;
 //             ^
@@ -12,7 +12,7 @@ import "dart:core" as core;
 
 static method f() → dynamic {
   try {
-    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: This couldn't be parsed.
+    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: This couldn't be parsed.
     true ?  : 2;
             ^" : 2;
   }
diff --git a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.expect b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.expect
index feef5e00e49..c4209c6333b 100644
--- a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.expect
+++ b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: Expected an identifier, but got ':'.
+// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: Expected an identifier, but got ':'.
 // Try inserting an identifier before ':'.
 //     true ?  : 2;
 //             ^
@@ -12,7 +12,7 @@ import "dart:core" as core;
 
 static method f() → dynamic {
   try {
-    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: This couldn't be parsed.
+    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: This couldn't be parsed.
     true ?  : 2;
             ^" : 2;
   }
diff --git a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.modular.expect b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.modular.expect
index feef5e00e49..c4209c6333b 100644
--- a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.modular.expect
+++ b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.modular.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: Expected an identifier, but got ':'.
+// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: Expected an identifier, but got ':'.
 // Try inserting an identifier before ':'.
 //     true ?  : 2;
 //             ^
@@ -12,7 +12,7 @@ import "dart:core" as core;
 
 static method f() → dynamic {
   try {
-    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: This couldn't be parsed.
+    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: This couldn't be parsed.
     true ?  : 2;
             ^" : 2;
   }
diff --git a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.transformed.expect b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.transformed.expect
index feef5e00e49..c4209c6333b 100644
--- a/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.transformed.expect
+++ b/pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart.weak.transformed.expect
@@ -2,7 +2,7 @@ library /*isNonNullableByDefault*/;
 //
 // Problems in library:
 //
-// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: Expected an identifier, but got ':'.
+// pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: Expected an identifier, but got ':'.
 // Try inserting an identifier before ':'.
 //     true ?  : 2;
 //             ^
@@ -12,7 +12,7 @@ import "dart:core" as core;
 
 static method f() → dynamic {
   try {
-    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:3:13: Error: This couldn't be parsed.
+    true ?{invalid-type} invalid-expression "pkg/front_end/testcases/patterns/error_recovery_after_question_suffix_in_expression.dart:7:13: Error: This couldn't be parsed.
     true ?  : 2;
             ^" : 2;
   }
diff --git a/pkg/front_end/testcases/patterns/extractor_pattern_inside_cast.dart b/pkg/front_end/testcases/patterns/extractor_pattern_inside_cast.dart
index e9c0965ee47..ec2ccb665b4 100644
--- a/pkg/front_end/testcases/patterns/extractor_pattern_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/extractor_pattern_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_assert.dart b/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_assert.dart
index ced59e0bc7e..ad420eef8a8 100644
--- a/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_check.dart b/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_check.dart
index b4b51230efb..cca16b9cc05 100644
--- a/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/extractor_pattern_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args.dart b/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args.dart
index b4536681fb7..d6950f19377 100644
--- a/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args.dart
+++ b/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C<T> {}
 
 test(dynamic x) {
diff --git a/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args_inside_null_assert.dart b/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args_inside_null_assert.dart
index 0cecead7495..ae4cbe1a82a 100644
--- a/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/extractor_pattern_with_type_args_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C<T> {
   T? f;
 }
diff --git a/pkg/front_end/testcases/patterns/final_variable_inside_case.dart b/pkg/front_end/testcases/patterns/final_variable_inside_case.dart
index c86381a097a..2fb2683be0f 100644
--- a/pkg/front_end/testcases/patterns/final_variable_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/final_variable_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final y:
diff --git a/pkg/front_end/testcases/patterns/final_variable_inside_cast.dart b/pkg/front_end/testcases/patterns/final_variable_inside_cast.dart
index f282dc90ded..05ff4c9832a 100644
--- a/pkg/front_end/testcases/patterns/final_variable_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/final_variable_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final y as Object:
diff --git a/pkg/front_end/testcases/patterns/final_variable_inside_if_case.dart b/pkg/front_end/testcases/patterns/final_variable_inside_if_case.dart
index 3adc2c0e0a0..c5b6a7bcd48 100644
--- a/pkg/front_end/testcases/patterns/final_variable_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/final_variable_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case final y) {}
 }
diff --git a/pkg/front_end/testcases/patterns/final_variable_inside_null_assert.dart b/pkg/front_end/testcases/patterns/final_variable_inside_null_assert.dart
index d9db6a1d5e7..98a9fb6327b 100644
--- a/pkg/front_end/testcases/patterns/final_variable_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/final_variable_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final y!:
diff --git a/pkg/front_end/testcases/patterns/final_variable_inside_null_check.dart b/pkg/front_end/testcases/patterns/final_variable_inside_null_check.dart
index cce20cd14bf..5cc333c7e16 100644
--- a/pkg/front_end/testcases/patterns/final_variable_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/final_variable_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final y?:
diff --git a/pkg/front_end/testcases/patterns/integer_literal_inside_case.dart b/pkg/front_end/testcases/patterns/integer_literal_inside_case.dart
index 0fec1617918..c576abeb5a7 100644
--- a/pkg/front_end/testcases/patterns/integer_literal_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/integer_literal_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1:
diff --git a/pkg/front_end/testcases/patterns/integer_literal_inside_cast.dart b/pkg/front_end/testcases/patterns/integer_literal_inside_cast.dart
index 1406426a2d9..ad2ffb57dc1 100644
--- a/pkg/front_end/testcases/patterns/integer_literal_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/integer_literal_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 as Object:
diff --git a/pkg/front_end/testcases/patterns/integer_literal_inside_if_case.dart b/pkg/front_end/testcases/patterns/integer_literal_inside_if_case.dart
index e94db9afd6d..dee0dfbdc2b 100644
--- a/pkg/front_end/testcases/patterns/integer_literal_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/integer_literal_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case 1) {}
 }
diff --git a/pkg/front_end/testcases/patterns/integer_literal_inside_null_assert.dart b/pkg/front_end/testcases/patterns/integer_literal_inside_null_assert.dart
index a5949903078..d318456a818 100644
--- a/pkg/front_end/testcases/patterns/integer_literal_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/integer_literal_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1!:
diff --git a/pkg/front_end/testcases/patterns/integer_literal_inside_null_check.dart b/pkg/front_end/testcases/patterns/integer_literal_inside_null_check.dart
index 9566ccbd329..9add6357ed8 100644
--- a/pkg/front_end/testcases/patterns/integer_literal_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/integer_literal_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1?:
diff --git a/pkg/front_end/testcases/patterns/list_pattern_inside_case.dart b/pkg/front_end/testcases/patterns/list_pattern_inside_case.dart
index 5a0d71ce070..71459693a7d 100644
--- a/pkg/front_end/testcases/patterns/list_pattern_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/list_pattern_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [1, 2]:
diff --git a/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty.dart b/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty.dart
index a324cd30773..554a9505e57 100644
--- a/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty.dart
+++ b/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case []:
diff --git a/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty_whitespace.dart b/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty_whitespace.dart
index a324cd30773..554a9505e57 100644
--- a/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty_whitespace.dart
+++ b/pkg/front_end/testcases/patterns/list_pattern_inside_case_empty_whitespace.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case []:
diff --git a/pkg/front_end/testcases/patterns/list_pattern_inside_case_with_type_arguments.dart b/pkg/front_end/testcases/patterns/list_pattern_inside_case_with_type_arguments.dart
index a157bf04084..3512380b172 100644
--- a/pkg/front_end/testcases/patterns/list_pattern_inside_case_with_type_arguments.dart
+++ b/pkg/front_end/testcases/patterns/list_pattern_inside_case_with_type_arguments.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case <int>[1, 2]:
diff --git a/pkg/front_end/testcases/patterns/list_pattern_inside_cast.dart b/pkg/front_end/testcases/patterns/list_pattern_inside_cast.dart
index 8ff639e9cec..6cdc6356f75 100644
--- a/pkg/front_end/testcases/patterns/list_pattern_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/list_pattern_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [1] as Object:
diff --git a/pkg/front_end/testcases/patterns/list_pattern_inside_null_assert.dart b/pkg/front_end/testcases/patterns/list_pattern_inside_null_assert.dart
index eb88027f624..b2580d9a0cf 100644
--- a/pkg/front_end/testcases/patterns/list_pattern_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/list_pattern_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [1]!:
diff --git a/pkg/front_end/testcases/patterns/list_pattern_inside_null_check.dart b/pkg/front_end/testcases/patterns/list_pattern_inside_null_check.dart
index e3f5eebb7a7..4752edf24b2 100644
--- a/pkg/front_end/testcases/patterns/list_pattern_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/list_pattern_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [1]?:
diff --git a/pkg/front_end/testcases/patterns/logical_and_inside_if_case.dart b/pkg/front_end/testcases/patterns/logical_and_inside_if_case.dart
index e61adebd921..300e377321c 100644
--- a/pkg/front_end/testcases/patterns/logical_and_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/logical_and_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case int? _ & double? _) {}
 }
diff --git a/pkg/front_end/testcases/patterns/logical_and_inside_logical_and_lhs.dart b/pkg/front_end/testcases/patterns/logical_and_inside_logical_and_lhs.dart
index b8195b34c41..615844ee0f1 100644
--- a/pkg/front_end/testcases/patterns/logical_and_inside_logical_and_lhs.dart
+++ b/pkg/front_end/testcases/patterns/logical_and_inside_logical_and_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ & double? _ & Object? _:
diff --git a/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_lhs.dart b/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_lhs.dart
index 2864da4bbe0..a7dcb264e6f 100644
--- a/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_lhs.dart
+++ b/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ & double? _ | Object? _:
diff --git a/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_rhs.dart b/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_rhs.dart
index 08f6ee572c5..b949237dada 100644
--- a/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_rhs.dart
+++ b/pkg/front_end/testcases/patterns/logical_and_inside_logical_or_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ | double? _ & Object? _:
diff --git a/pkg/front_end/testcases/patterns/logical_or_inside_if_case.dart b/pkg/front_end/testcases/patterns/logical_or_inside_if_case.dart
index 49c82b7d61f..8e2c853bbb2 100644
--- a/pkg/front_end/testcases/patterns/logical_or_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/logical_or_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case int? _ | double? _) {}
 }
diff --git a/pkg/front_end/testcases/patterns/logical_or_inside_logical_or_lhs.dart b/pkg/front_end/testcases/patterns/logical_or_inside_logical_or_lhs.dart
index 594f152697a..281e2a415ab 100644
--- a/pkg/front_end/testcases/patterns/logical_or_inside_logical_or_lhs.dart
+++ b/pkg/front_end/testcases/patterns/logical_or_inside_logical_or_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int? _ | double? _ | Object? _:
diff --git a/pkg/front_end/testcases/patterns/map_pattern_inside_case.dart b/pkg/front_end/testcases/patterns/map_pattern_inside_case.dart
index 901134c5311..6165ee86e72 100644
--- a/pkg/front_end/testcases/patterns/map_pattern_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/map_pattern_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': 1, 'b': 2}:
diff --git a/pkg/front_end/testcases/patterns/map_pattern_inside_case_empty.dart b/pkg/front_end/testcases/patterns/map_pattern_inside_case_empty.dart
index cb9625bc958..554c608c66c 100644
--- a/pkg/front_end/testcases/patterns/map_pattern_inside_case_empty.dart
+++ b/pkg/front_end/testcases/patterns/map_pattern_inside_case_empty.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {}:
diff --git a/pkg/front_end/testcases/patterns/map_pattern_inside_case_with_type_arguments.dart b/pkg/front_end/testcases/patterns/map_pattern_inside_case_with_type_arguments.dart
index f997a277774..d1d56ba8c7f 100644
--- a/pkg/front_end/testcases/patterns/map_pattern_inside_case_with_type_arguments.dart
+++ b/pkg/front_end/testcases/patterns/map_pattern_inside_case_with_type_arguments.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case <String, int>{'a': 1, 'b': 2}:
diff --git a/pkg/front_end/testcases/patterns/map_pattern_inside_cast.dart b/pkg/front_end/testcases/patterns/map_pattern_inside_cast.dart
index a98fd3b4569..84db589154d 100644
--- a/pkg/front_end/testcases/patterns/map_pattern_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/map_pattern_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': 1} as Object:
diff --git a/pkg/front_end/testcases/patterns/map_pattern_inside_if_case.dart b/pkg/front_end/testcases/patterns/map_pattern_inside_if_case.dart
index 747678b0fa8..5545854c927 100644
--- a/pkg/front_end/testcases/patterns/map_pattern_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/map_pattern_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case {'a': 1, 'b': 2}) {}
 }
diff --git a/pkg/front_end/testcases/patterns/map_pattern_inside_null_assert.dart b/pkg/front_end/testcases/patterns/map_pattern_inside_null_assert.dart
index 348cfc4ce2f..7745f93d24d 100644
--- a/pkg/front_end/testcases/patterns/map_pattern_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/map_pattern_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': 1}!:
diff --git a/pkg/front_end/testcases/patterns/map_pattern_inside_null_check.dart b/pkg/front_end/testcases/patterns/map_pattern_inside_null_check.dart
index b92be3e3c09..5ac33c2820e 100644
--- a/pkg/front_end/testcases/patterns/map_pattern_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/map_pattern_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': 1}?:
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_case.dart b/pkg/front_end/testcases/patterns/null_assert_inside_case.dart
index 551a532fe47..abb35c7ee06 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   switch (x) {
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern.dart b/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern.dart
index 1da35edc72f..a73bbf9817c 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern_implicitly_named.dart
index 57cdf02cb09..222679c257d 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_extractor_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_if_case.dart b/pkg/front_end/testcases/patterns/null_assert_inside_if_case.dart
index 72748e848c4..ab36d912fbf 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case var y!) {}
 }
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_list_pattern.dart b/pkg/front_end/testcases/patterns/null_assert_inside_list_pattern.dart
index 8ca83384796..2f233ed2316 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_list_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_list_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [1!]:
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_lhs.dart b/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_lhs.dart
index 86b756ec956..40d5be28f08 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_lhs.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1! & 2:
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_rhs.dart b/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_rhs.dart
index ff84f4eedaa..5569d5d9267 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_rhs.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_logical_and_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 & 2!:
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_lhs.dart b/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_lhs.dart
index e97cea30dc6..c747c771a2f 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_lhs.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1! | 2:
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_rhs.dart b/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_rhs.dart
index 75511fe48bf..a4f437ebbf7 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_rhs.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_logical_or_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 | 2!:
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_map_pattern.dart b/pkg/front_end/testcases/patterns/null_assert_inside_map_pattern.dart
index 5988a1d6b67..a1247079aff 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_map_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_map_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': 1!}:
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_parenthesized_pattern.dart b/pkg/front_end/testcases/patterns/null_assert_inside_parenthesized_pattern.dart
index b9a3f9fe175..8d76a0d5200 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_parenthesized_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_parenthesized_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1!):
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_implicitly_named.dart
index eb346ba3391..c4f02db0764 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (: var n!, 2):
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_named.dart b/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_named.dart
index ec784396ec9..beb931a651e 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_named.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (n: 1!, 2):
diff --git a/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_unnamed.dart b/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_unnamed.dart
index c9c86bd8b80..2fb576a9177 100644
--- a/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_unnamed.dart
+++ b/pkg/front_end/testcases/patterns/null_assert_inside_record_pattern_unnamed.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1!, 2):
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_case.dart b/pkg/front_end/testcases/patterns/null_check_inside_case.dart
index 642f1e74664..ed492088d1a 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   const y = 1;
   switch (x) {
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern.dart b/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern.dart
index a0d4ce1273a..be964cd46c0 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern_implicitly_named.dart
index 982edaa53b9..89b0ee220b5 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_extractor_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_if_case.dart b/pkg/front_end/testcases/patterns/null_check_inside_if_case.dart
index 8112c8969f7..27230d16a79 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case var y?) {}
 }
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_list_pattern.dart b/pkg/front_end/testcases/patterns/null_check_inside_list_pattern.dart
index 3b9734133e0..5dc635587b2 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_list_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_list_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [1?]:
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_logical_and_lhs.dart b/pkg/front_end/testcases/patterns/null_check_inside_logical_and_lhs.dart
index 1b2721d1528..ae28b0b08d9 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_logical_and_lhs.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_logical_and_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1? & 2:
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_logical_and_rhs.dart b/pkg/front_end/testcases/patterns/null_check_inside_logical_and_rhs.dart
index 519e4763e96..0dc01dab40f 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_logical_and_rhs.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_logical_and_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 & 2?:
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_logical_or_lhs.dart b/pkg/front_end/testcases/patterns/null_check_inside_logical_or_lhs.dart
index 307ba8063e6..70db7638f9e 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_logical_or_lhs.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_logical_or_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1? | 2:
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_logical_or_rhs.dart b/pkg/front_end/testcases/patterns/null_check_inside_logical_or_rhs.dart
index 81f3894c43e..be2e0ab204f 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_logical_or_rhs.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_logical_or_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 | 2?:
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_map_pattern.dart b/pkg/front_end/testcases/patterns/null_check_inside_map_pattern.dart
index d23631cdd11..8b546b68663 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_map_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_map_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': 1?}:
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_parenthesized_pattern.dart b/pkg/front_end/testcases/patterns/null_check_inside_parenthesized_pattern.dart
index edd38435ced..628830b9103 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_parenthesized_pattern.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_parenthesized_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1?):
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_implicitly_named.dart
index 902a14a77d8..ecaa842123c 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (: var n?, 2):
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_named.dart b/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_named.dart
index cf7275bfbe7..5a50eac3d70 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_named.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (n: 1?, 2):
diff --git a/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_unnamed.dart b/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_unnamed.dart
index d91df549fe4..f47158b55b5 100644
--- a/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_unnamed.dart
+++ b/pkg/front_end/testcases/patterns/null_check_inside_record_pattern_unnamed.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1?, 2):
diff --git a/pkg/front_end/testcases/patterns/null_literal_inside_case.dart b/pkg/front_end/testcases/patterns/null_literal_inside_case.dart
index 2b9c2940d2e..c61dbcdf69c 100644
--- a/pkg/front_end/testcases/patterns/null_literal_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/null_literal_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case null:
diff --git a/pkg/front_end/testcases/patterns/null_literal_inside_cast.dart b/pkg/front_end/testcases/patterns/null_literal_inside_cast.dart
index 33ac6393be1..f1dd26ceedb 100644
--- a/pkg/front_end/testcases/patterns/null_literal_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/null_literal_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case null as Object:
diff --git a/pkg/front_end/testcases/patterns/null_literal_inside_if_case.dart b/pkg/front_end/testcases/patterns/null_literal_inside_if_case.dart
index 7129f396e91..5676de2eaa9 100644
--- a/pkg/front_end/testcases/patterns/null_literal_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/null_literal_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case null) {}
 }
diff --git a/pkg/front_end/testcases/patterns/null_literal_inside_null_assert.dart b/pkg/front_end/testcases/patterns/null_literal_inside_null_assert.dart
index 0c1701afa66..719dfcad920 100644
--- a/pkg/front_end/testcases/patterns/null_literal_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/null_literal_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case null!:
diff --git a/pkg/front_end/testcases/patterns/null_literal_inside_null_check.dart b/pkg/front_end/testcases/patterns/null_literal_inside_null_check.dart
index 3e27a6a5419..b961830744f 100644
--- a/pkg/front_end/testcases/patterns/null_literal_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/null_literal_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case null?:
diff --git a/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_cast.dart b/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_cast.dart
index 560fd364c6d..31cad02c41f 100644
--- a/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1) as Object:
diff --git a/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_assert.dart b/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_assert.dart
index 343b0c78a29..bc05e661e5d 100644
--- a/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1)!:
diff --git a/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_check.dart b/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_check.dart
index 092ffae7729..5607949f193 100644
--- a/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/parenthesized_pattern_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1)?:
diff --git a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args.dart b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args.dart
index e3e1be76e5a..9502d841422 100644
--- a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args.dart
+++ b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'dart:async' as async;
 
 test(dynamic x) {
diff --git a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_cast.dart b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_cast.dart
index a2b5b015275..a844a178463 100644
--- a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'dart:async' as async;
 
 test(dynamic x) {
diff --git a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_assert.dart b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_assert.dart
index 32ff7d62d4f..d08704d0012 100644
--- a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'dart:async' as async;
 
 test(dynamic x) {
diff --git a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_check.dart b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_check.dart
index bac5f392ab5..43a87f1306d 100644
--- a/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/prefixed_extractor_pattern_with_type_args_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 import 'dart:async' as async;
 
 test(dynamic x) {
diff --git a/pkg/front_end/testcases/patterns/record_pattern_inside_case.dart b/pkg/front_end/testcases/patterns/record_pattern_inside_case.dart
index 8e47fb876da..cdba1fdcdc3 100644
--- a/pkg/front_end/testcases/patterns/record_pattern_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/record_pattern_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1, 2):
diff --git a/pkg/front_end/testcases/patterns/record_pattern_inside_case_empty.dart b/pkg/front_end/testcases/patterns/record_pattern_inside_case_empty.dart
index 21999ff394a..175bfa28786 100644
--- a/pkg/front_end/testcases/patterns/record_pattern_inside_case_empty.dart
+++ b/pkg/front_end/testcases/patterns/record_pattern_inside_case_empty.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case ():
diff --git a/pkg/front_end/testcases/patterns/record_pattern_inside_case_singleton.dart b/pkg/front_end/testcases/patterns/record_pattern_inside_case_singleton.dart
index f3332644e64..35cb32ca632 100644
--- a/pkg/front_end/testcases/patterns/record_pattern_inside_case_singleton.dart
+++ b/pkg/front_end/testcases/patterns/record_pattern_inside_case_singleton.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1,):
diff --git a/pkg/front_end/testcases/patterns/record_pattern_inside_cast.dart b/pkg/front_end/testcases/patterns/record_pattern_inside_cast.dart
index bc972a3c782..b4db15d941e 100644
--- a/pkg/front_end/testcases/patterns/record_pattern_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/record_pattern_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1, 2) as Object:
diff --git a/pkg/front_end/testcases/patterns/record_pattern_inside_if_case.dart b/pkg/front_end/testcases/patterns/record_pattern_inside_if_case.dart
index 4cdf62f5ceb..adc6eea6774 100644
--- a/pkg/front_end/testcases/patterns/record_pattern_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/record_pattern_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case (1, 2)) {}
   if (x case (1, a: 2)) {}
diff --git a/pkg/front_end/testcases/patterns/record_pattern_inside_null_assert.dart b/pkg/front_end/testcases/patterns/record_pattern_inside_null_assert.dart
index e38fe125ad0..807ac4b5876 100644
--- a/pkg/front_end/testcases/patterns/record_pattern_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/record_pattern_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1, 2)!:
diff --git a/pkg/front_end/testcases/patterns/record_pattern_inside_null_check.dart b/pkg/front_end/testcases/patterns/record_pattern_inside_null_check.dart
index 19e41f87440..779089dcb22 100644
--- a/pkg/front_end/testcases/patterns/record_pattern_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/record_pattern_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (1, 2)?:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_case_equal.dart b/pkg/front_end/testcases/patterns/relational_inside_case_equal.dart
index 42b228a92d9..680a10b6919 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_case_equal.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_case_equal.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case == 1 << 1:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_case_greater_than.dart b/pkg/front_end/testcases/patterns/relational_inside_case_greater_than.dart
index 694d98ae1e5..3d24c9bb7b3 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_case_greater_than.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_case_greater_than.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case > 1 << 1:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_case_greater_than_or_equal.dart b/pkg/front_end/testcases/patterns/relational_inside_case_greater_than_or_equal.dart
index 7b14a3baf89..a037df35279 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_case_greater_than_or_equal.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_case_greater_than_or_equal.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case >= 1 << 1:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_case_less_than.dart b/pkg/front_end/testcases/patterns/relational_inside_case_less_than.dart
index e07efbfda9d..ebe77192064 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_case_less_than.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_case_less_than.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case < 1 << 1:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_case_less_than_or_equal.dart b/pkg/front_end/testcases/patterns/relational_inside_case_less_than_or_equal.dart
index 0ae950c1e8c..254032a543e 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_case_less_than_or_equal.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_case_less_than_or_equal.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case <= 1 << 1:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_case_not_equal.dart b/pkg/front_end/testcases/patterns/relational_inside_case_not_equal.dart
index 2de3a3b04b3..edf7d1eaab3 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_case_not_equal.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_case_not_equal.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case != 1 << 1:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_extractor_pattern.dart b/pkg/front_end/testcases/patterns/relational_inside_extractor_pattern.dart
index 9331783c8de..53ce7ab8455 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_extractor_pattern.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_extractor_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/relational_inside_list_pattern.dart b/pkg/front_end/testcases/patterns/relational_inside_list_pattern.dart
index 4a1a1209144..cf5dbc66f2c 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_list_pattern.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_list_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [== 1]:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_logical_and_lhs.dart b/pkg/front_end/testcases/patterns/relational_inside_logical_and_lhs.dart
index fd98413bfcd..3ad2c4cc161 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_logical_and_lhs.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_logical_and_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case == 1 & 2:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_logical_and_rhs.dart b/pkg/front_end/testcases/patterns/relational_inside_logical_and_rhs.dart
index f94c2daaf29..34957e5c2e4 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_logical_and_rhs.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_logical_and_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 & == 2:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_logical_or_lhs.dart b/pkg/front_end/testcases/patterns/relational_inside_logical_or_lhs.dart
index 7c0299e0a7f..0a553bb5ce5 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_logical_or_lhs.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_logical_or_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case == 1 | 2:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_logical_or_rhs.dart b/pkg/front_end/testcases/patterns/relational_inside_logical_or_rhs.dart
index 72ede7b65e6..02844650b7b 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_logical_or_rhs.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_logical_or_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 | == 2:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_map_pattern.dart b/pkg/front_end/testcases/patterns/relational_inside_map_pattern.dart
index dfdfdfcb5f6..96f43f361f5 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_map_pattern.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_map_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': == 1}:
diff --git a/pkg/front_end/testcases/patterns/relational_inside_parenthesized_pattern.dart b/pkg/front_end/testcases/patterns/relational_inside_parenthesized_pattern.dart
index 236ce5be7eb..4175292003a 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_parenthesized_pattern.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_parenthesized_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (== 1):
diff --git a/pkg/front_end/testcases/patterns/relational_inside_record_pattern_named.dart b/pkg/front_end/testcases/patterns/relational_inside_record_pattern_named.dart
index 18b00a39c55..ffaa1aacbfb 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_record_pattern_named.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_record_pattern_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (n: == 1, 2):
diff --git a/pkg/front_end/testcases/patterns/relational_inside_record_pattern_unnamed.dart b/pkg/front_end/testcases/patterns/relational_inside_record_pattern_unnamed.dart
index 3a9fce38297..5c299f13573 100644
--- a/pkg/front_end/testcases/patterns/relational_inside_record_pattern_unnamed.dart
+++ b/pkg/front_end/testcases/patterns/relational_inside_record_pattern_unnamed.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (== 1, 2):
diff --git a/pkg/front_end/testcases/patterns/string_literal_inside_case.dart b/pkg/front_end/testcases/patterns/string_literal_inside_case.dart
index 5b727231185..821a8b2bb55 100644
--- a/pkg/front_end/testcases/patterns/string_literal_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/string_literal_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case "x":
diff --git a/pkg/front_end/testcases/patterns/string_literal_inside_cast.dart b/pkg/front_end/testcases/patterns/string_literal_inside_cast.dart
index 4a0772b38de..9194c2ca7e8 100644
--- a/pkg/front_end/testcases/patterns/string_literal_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/string_literal_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case "x" as Object:
diff --git a/pkg/front_end/testcases/patterns/string_literal_inside_if_case.dart b/pkg/front_end/testcases/patterns/string_literal_inside_if_case.dart
index d942735b61c..84281713fb9 100644
--- a/pkg/front_end/testcases/patterns/string_literal_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/string_literal_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case "x") {}
 }
diff --git a/pkg/front_end/testcases/patterns/string_literal_inside_null_assert.dart b/pkg/front_end/testcases/patterns/string_literal_inside_null_assert.dart
index 02484b9acf8..c7e5f152e3d 100644
--- a/pkg/front_end/testcases/patterns/string_literal_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/string_literal_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case "x"!:
diff --git a/pkg/front_end/testcases/patterns/string_literal_inside_null_check.dart b/pkg/front_end/testcases/patterns/string_literal_inside_null_check.dart
index afc0b4aafd7..8c9d03336d0 100644
--- a/pkg/front_end/testcases/patterns/string_literal_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/string_literal_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case "x"?:
diff --git a/pkg/front_end/testcases/patterns/typed_final_variable_inside_case.dart b/pkg/front_end/testcases/patterns/typed_final_variable_inside_case.dart
index 69263dc52f9..237edec8c48 100644
--- a/pkg/front_end/testcases/patterns/typed_final_variable_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/typed_final_variable_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final int y:
diff --git a/pkg/front_end/testcases/patterns/typed_final_variable_inside_cast.dart b/pkg/front_end/testcases/patterns/typed_final_variable_inside_cast.dart
index 55eff0422e9..66b2f0a28c8 100644
--- a/pkg/front_end/testcases/patterns/typed_final_variable_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/typed_final_variable_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final int y as Object:
diff --git a/pkg/front_end/testcases/patterns/typed_final_variable_inside_if_case.dart b/pkg/front_end/testcases/patterns/typed_final_variable_inside_if_case.dart
index 23a7be5db83..0388ca84e7f 100644
--- a/pkg/front_end/testcases/patterns/typed_final_variable_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/typed_final_variable_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case final int y) {}
 }
diff --git a/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_assert.dart b/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_assert.dart
index 60bc23fbb94..4237d6aa1eb 100644
--- a/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final int y!:
diff --git a/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_check.dart b/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_check.dart
index 0c353b02d52..26b452fcdd7 100644
--- a/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/typed_final_variable_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case final int y?:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_inside_case.dart b/pkg/front_end/testcases/patterns/typed_variable_inside_case.dart
index 0467e3a084a..d28db61db78 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int y:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_inside_cast.dart b/pkg/front_end/testcases/patterns/typed_variable_inside_cast.dart
index d7014fbd908..9c0ec4f1e62 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int y as Object:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_inside_if_case.dart b/pkg/front_end/testcases/patterns/typed_variable_inside_if_case.dart
index d196b022173..b6356689dcb 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case int y) {}
 }
diff --git a/pkg/front_end/testcases/patterns/typed_variable_inside_null_assert.dart b/pkg/front_end/testcases/patterns/typed_variable_inside_null_assert.dart
index 15f6ee15c7b..dffe4dfea67 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int y!:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_inside_null_check.dart b/pkg/front_end/testcases/patterns/typed_variable_inside_null_check.dart
index b5d73c0d963..4240aedfd06 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int y?:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_case.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_case.dart
index 1ed75c0a1d2..52a7f367b5c 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int as:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_cast.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_cast.dart
index 7ad75b04275..0ce40033d07 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int as as Object:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern.dart
index 019892f64b6..27888898d83 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern_implicitly_named.dart
index c3b174572e6..7126fdb471f 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_extractor_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 class C {
   int? f;
 }
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_if_case.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_if_case.dart
index 48bef7bfaaf..c2529c18e46 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case int as) {}
 }
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_list_pattern.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_list_pattern.dart
index e0c81052a7d..121ff6b69f1 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_list_pattern.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_list_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case [int as]:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_lhs.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_lhs.dart
index 1db90f3f8ae..97207a3f6df 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_lhs.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int as & 2:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_rhs.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_rhs.dart
index af77ec088d0..0f0f858c1f4 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_rhs.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_and_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 & int as:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_lhs.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_lhs.dart
index 7252f50f259..591f9df3075 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_lhs.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_lhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int as | 2:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_rhs.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_rhs.dart
index 1299dfe4dff..ccb74b51cca 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_rhs.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_logical_or_rhs.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case 1 | int as:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_map_pattern.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_map_pattern.dart
index 8d20335ee31..e978b7f51c2 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_map_pattern.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_map_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case {'a': int as}:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_assert.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_assert.dart
index 0ae62db572a..ddaee95869a 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int as!:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_check.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_check.dart
index 07f6b72fdcc..ebe1a52ad26 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case int as?:
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_parenthesized_pattern.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_parenthesized_pattern.dart
index e4f6eeb8f1a..1b53187baff 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_parenthesized_pattern.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_parenthesized_pattern.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (int as):
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_implicitly_named.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_implicitly_named.dart
index b1b1106000d..1370cec5539 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_implicitly_named.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_implicitly_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (: int as, 2):
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_named.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_named.dart
index c1e202e9e1c..3c2310dcb08 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_named.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_named.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (n: int as, 2):
diff --git a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_unnamed.dart b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_unnamed.dart
index 656b439a34e..3e2f6c4a9c3 100644
--- a/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_unnamed.dart
+++ b/pkg/front_end/testcases/patterns/typed_variable_named_as_inside_record_pattern_unnamed.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case (int as, 2):
diff --git a/pkg/front_end/testcases/patterns/var_variable_inside_case.dart b/pkg/front_end/testcases/patterns/var_variable_inside_case.dart
index 0e106d8a406..1d08b2381c8 100644
--- a/pkg/front_end/testcases/patterns/var_variable_inside_case.dart
+++ b/pkg/front_end/testcases/patterns/var_variable_inside_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case var y:
diff --git a/pkg/front_end/testcases/patterns/var_variable_inside_cast.dart b/pkg/front_end/testcases/patterns/var_variable_inside_cast.dart
index 78d4369647a..dc3bcc83d95 100644
--- a/pkg/front_end/testcases/patterns/var_variable_inside_cast.dart
+++ b/pkg/front_end/testcases/patterns/var_variable_inside_cast.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case var y as Object:
diff --git a/pkg/front_end/testcases/patterns/var_variable_inside_if_case.dart b/pkg/front_end/testcases/patterns/var_variable_inside_if_case.dart
index 90e1b5a51f9..fed4517c3a3 100644
--- a/pkg/front_end/testcases/patterns/var_variable_inside_if_case.dart
+++ b/pkg/front_end/testcases/patterns/var_variable_inside_if_case.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   if (x case var y) {}
 }
diff --git a/pkg/front_end/testcases/patterns/var_variable_inside_null_assert.dart b/pkg/front_end/testcases/patterns/var_variable_inside_null_assert.dart
index bd9e6563127..bda41e4b15a 100644
--- a/pkg/front_end/testcases/patterns/var_variable_inside_null_assert.dart
+++ b/pkg/front_end/testcases/patterns/var_variable_inside_null_assert.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case var y!:
diff --git a/pkg/front_end/testcases/patterns/var_variable_inside_null_check.dart b/pkg/front_end/testcases/patterns/var_variable_inside_null_check.dart
index 719c79e20ec..6b573c0744f 100644
--- a/pkg/front_end/testcases/patterns/var_variable_inside_null_check.dart
+++ b/pkg/front_end/testcases/patterns/var_variable_inside_null_check.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
 test(dynamic x) {
   switch (x) {
     case var y?: