diff --git a/response_writer_test.go b/response_writer_test.go
index 330e7a2..eefeacd 100644
--- a/response_writer_test.go
+++ b/response_writer_test.go
@@ -1,3 +1,7 @@
+// Copyright 2022 Sylvain Müller. All rights reserved.
+// Mount of this source code is governed by a Apache-2.0 license that can be found
+// at https://github.com/tigerwill90/fox/blob/master/LICENSE.txt.
+
 package fox
 
 import (