diff --git a/rcl/test/CMakeLists.txt b/rcl/test/CMakeLists.txt
index 1931d0cb2..506dbf8d8 100644
--- a/rcl/test/CMakeLists.txt
+++ b/rcl/test/CMakeLists.txt
@@ -295,7 +295,7 @@ function(test_target_function)
   )
 
   rcl_add_custom_gtest(test_namespace${target_suffix}
-    SRCS test_namespace.cpp
+    SRCS rcl/test_namespace.cpp
     ENV ${rmw_implementation_env_var}
     APPEND_LIBRARY_DIRS ${extra_lib_dirs}
     LIBRARIES ${PROJECT_NAME}
diff --git a/rcl/test/test_namespace.cpp b/rcl/test/rcl/test_namespace.cpp
similarity index 100%
rename from rcl/test/test_namespace.cpp
rename to rcl/test/rcl/test_namespace.cpp