diff --git a/src/csg/CMakeLists.txt b/src/csg/CMakeLists.txt
index 867d42d629f27a4e9a09886cba6bf84a6028d000..4807a8cf914ce6221840f3cc028c9e1c29dc5090 100644
--- a/src/csg/CMakeLists.txt
+++ b/src/csg/CMakeLists.txt
@@ -29,4 +29,6 @@ if (CSG_CGAL_ENABLED)
    target_link_libraries(csg-eb PRIVATE CGAL::CGAL)
 endif()
 
-add_subdirectory(tests)
+if (BUILD_TESTING)
+   add_subdirectory(tests)
+endif()