diff --git a/pkgs/http_client_conformance_tests/example/client_test.dart b/pkgs/http_client_conformance_tests/example/client_test.dart
index 0b4bbb3089..8fe242ddbe 100644
--- a/pkgs/http_client_conformance_tests/example/client_test.dart
+++ b/pkgs/http_client_conformance_tests/example/client_test.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2025, 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 'package:http/http.dart';
 import 'package:http_client_conformance_tests/http_client_conformance_tests.dart';
 import 'package:test/test.dart';
diff --git a/pkgs/http_client_conformance_tests/lib/src/dummy_isolate.dart b/pkgs/http_client_conformance_tests/lib/src/dummy_isolate.dart
index 0f592220f1..b60ab46c02 100644
--- a/pkgs/http_client_conformance_tests/lib/src/dummy_isolate.dart
+++ b/pkgs/http_client_conformance_tests/lib/src/dummy_isolate.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2025, 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';
 
 // ignore: avoid_classes_with_only_static_members
diff --git a/pkgs/http_parser/test/example_test.dart b/pkgs/http_parser/test/example_test.dart
index bbf869f1cb..08dca8bac6 100644
--- a/pkgs/http_parser/test/example_test.dart
+++ b/pkgs/http_parser/test/example_test.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2025, 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:io';
 
 import 'package:test/test.dart';
diff --git a/pkgs/http_profile/lib/http_profile.dart b/pkgs/http_profile/lib/http_profile.dart
index 0a1c283f4d..4d6707d710 100644
--- a/pkgs/http_profile/lib/http_profile.dart
+++ b/pkgs/http_profile/lib/http_profile.dart
@@ -1 +1,5 @@
+// Copyright (c) 2025, 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.
+
 export 'src/http_profile.dart';
diff --git a/pkgs/web_socket/example/web_socket_example.dart b/pkgs/web_socket/example/web_socket_example.dart
index 423b2016ed..e87cb58d34 100644
--- a/pkgs/web_socket/example/web_socket_example.dart
+++ b/pkgs/web_socket/example/web_socket_example.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2025, 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:convert';
 import 'dart:io';
 
diff --git a/pkgs/web_socket/lib/testing.dart b/pkgs/web_socket/lib/testing.dart
index 669bf1dfb3..d17aa56858 100644
--- a/pkgs/web_socket/lib/testing.dart
+++ b/pkgs/web_socket/lib/testing.dart
@@ -1 +1,5 @@
+// Copyright (c) 2025, 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.
+
 export 'src/fake_web_socket.dart' show fakes;
diff --git a/pkgs/web_socket_conformance_tests/example/client_test.dart b/pkgs/web_socket_conformance_tests/example/client_test.dart
index d08dad94c1..7e71b3b399 100644
--- a/pkgs/web_socket_conformance_tests/example/client_test.dart
+++ b/pkgs/web_socket_conformance_tests/example/client_test.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2025, 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:typed_data';
 
 import 'package:test/test.dart';