diff --git a/protoc_plugin/test/optional_bool.dart b/protoc_plugin/test/optional_bool_test.dart
similarity index 68%
rename from protoc_plugin/test/optional_bool.dart
rename to protoc_plugin/test/optional_bool_test.dart
index 350a613..a66c50c 100644
--- a/protoc_plugin/test/optional_bool.dart
+++ b/protoc_plugin/test/optional_bool_test.dart
@@ -1,3 +1,7 @@
+// Copyright (c) 2016, 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:test/test.dart';
 
 import '../out/protos/optional_bool.pb.dart';