diff --git a/tests/integration/CMakeLists.txt b/tests/integration/CMakeLists.txt
index 641feae..d120531 100644
--- a/tests/integration/CMakeLists.txt
+++ b/tests/integration/CMakeLists.txt
@@ -86,7 +86,6 @@ target_link_libraries(vk_hpp PRIVATE Vulkan::Headers)
 # vulkan.cppm
 if (VULKAN_HEADERS_ENABLE_MODULE)
     add_library(vk_hpp_module MODULE ../vk_hpp_module.cpp)
-    target_compile_features(vk_hpp_module PUBLIC cxx_std_20)
     set_target_properties(vk_hpp_module PROPERTIES CXX_SCAN_FOR_MODULES ON)
     target_link_libraries(vk_hpp_module PRIVATE Vulkan::HppModule)
 endif()
\ No newline at end of file
diff --git a/tests/vk_hpp.cpp b/tests/vk_hpp.cpp
index 18bd57a..5f2ce9d 100644
--- a/tests/vk_hpp.cpp
+++ b/tests/vk_hpp.cpp
@@ -1,6 +1,13 @@
+/*
+ * Copyright 2025 The Khronos Group Inc.
+ * Copyright 2025 Valve Corporation
+ * Copyright 2025 LunarG, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 #include <vulkan/vulkan.hpp>
 
-int square(int i)
+int header_version()
 {
-    return i * i;
+    return VK_HEADER_VERSION;
 }
\ No newline at end of file
diff --git a/tests/vk_hpp_module.cpp b/tests/vk_hpp_module.cpp
index 6ae92b9..7ea6049 100644
--- a/tests/vk_hpp_module.cpp
+++ b/tests/vk_hpp_module.cpp
@@ -1,6 +1,13 @@
+/*
+ * Copyright 2025 The Khronos Group Inc.
+ * Copyright 2025 Valve Corporation
+ * Copyright 2025 LunarG, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
 import vulkan_hpp;
 
-int square(int i)
+int header_version()
 {
-    return i * i;
+    return VK_HEADER_VERSION;
 }
\ No newline at end of file