diff --git a/tests/test-utils.c b/tests/test-utils.c
index 205393c..f8bea2f 100644
--- a/tests/test-utils.c
+++ b/tests/test-utils.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */
 
 #include <string.h>
 #include <assert.h>
diff --git a/tests/test-utils.h b/tests/test-utils.h
index b565876..94f43b8 100644
--- a/tests/test-utils.h
+++ b/tests/test-utils.h
@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */
+
 #ifndef _MCTP_TESTS_TEST_UTILS_H
 #define _MCTP_TESTS_TEST_UTILS_H
 
diff --git a/tests/test_eid.c b/tests/test_eid.c
index 2123a85..c4ab9da 100644
--- a/tests/test_eid.c
+++ b/tests/test_eid.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */
 
 #include <assert.h>
 #include <stdlib.h>
diff --git a/tests/test_seq.c b/tests/test_seq.c
index 13c5cb9..1fc5b8f 100644
--- a/tests/test_seq.c
+++ b/tests/test_seq.c
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later */
 
 #include <assert.h>
 #include <stdlib.h>