diff --git a/CMakeLists.txt b/CMakeLists.txt
index 049b6fe..bb201e1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,6 +45,7 @@ endif()
 if (BUILD_TESTS STREQUAL "ON")
 	add_library(${PROJECT_NAME}_test OBJECT)
 	target_sources(${PROJECT_NAME}_test PRIVATE "${mtl_sources_test}")
+	target_include_directories(${PROJECT_NAME}_test PUBLIC "${mtl_include_common}")
 	target_link_libraries(${PROJECT_NAME} PUBLIC ${PROJECT_NAME}_test)
 endif()