diff --git a/tests/unittests/test_fragment_uri.cc b/tests/unittests/test_fragment_uri.cc
index 2c2b79d58b..3490e8c8bd 100644
--- a/tests/unittests/test_fragment_uri.cc
+++ b/tests/unittests/test_fragment_uri.cc
@@ -1,3 +1,5 @@
+/* -*- tab-width: 4; -*- */
+/* vi: set sw=2 ts=4 expandtab: */
 // Copyright 2022-2023 The Khronos Group Inc.
 // Copyright 2022-2023 RasterGrid Kft.
 // SPDX-License-Identifier: Apache-2.0
diff --git a/tests/unittests/test_string_to_vkformat.cc b/tests/unittests/test_string_to_vkformat.cc
index 3505650e01..2ac67f5628 100644
--- a/tests/unittests/test_string_to_vkformat.cc
+++ b/tests/unittests/test_string_to_vkformat.cc
@@ -1,3 +1,5 @@
+/* -*- tab-width: 4; -*- */
+/* vi: set sw=2 ts=4 expandtab: */
 // Copyright 2022-2023 The Khronos Group Inc.
 // Copyright 2022-2023 RasterGrid Kft.
 // SPDX-License-Identifier: Apache-2.0