diff --git a/tests/include/test/psa_memory_poisoning_wrappers.h b/tests/include/test/psa_memory_poisoning_wrappers.h
index e1642d2..3422339 100644
--- a/tests/include/test/psa_memory_poisoning_wrappers.h
+++ b/tests/include/test/psa_memory_poisoning_wrappers.h
@@ -1,3 +1,8 @@
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
 #include "psa/crypto.h"
 
 #include "test/memory.h"