diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a772cdd3a..408add0c5 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -64,7 +64,7 @@ if (BUILD_TESTING)
   if (TARGET UNIT_gz_TEST)
     target_compile_definitions(UNIT_gz_TEST PRIVATE
       -DGZ_PATH="${GZ_PROGRAM}"
-      -DDETAIL_GZ_CONFIG_PATH="${CMAKE_BINARY_DIR}/test/conf"
+      -DDETAIL_GZ_CONFIG_PATH="${CMAKE_BINARY_DIR}/test/conf/$<CONFIG>"
       -DGZ_TEST_LIBRARY_PATH="${PROJECT_BINARY_DIR}/src")
   endif()