diff --git a/libcxx/test/support/archetypes.h b/libcxx/test/support/archetypes.h
--- a/libcxx/test/support/archetypes.h
+++ b/libcxx/test/support/archetypes.h
@@ -1,3 +1,11 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
 #ifndef TEST_SUPPORT_ARCHETYPES_H
 #define TEST_SUPPORT_ARCHETYPES_H
 
diff --git a/libcxx/test/support/archetypes.ipp b/libcxx/test/support/archetypes.ipp
--- a/libcxx/test/support/archetypes.ipp
+++ b/libcxx/test/support/archetypes.ipp
@@ -1,3 +1,10 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
 
 #ifndef DEFINE_BASE
 #define DEFINE_BASE(Name) ::ArchetypeBases::NullBase