--- CMakeLists.txt.orig	2026-05-20 10:59:57 UTC
+++ CMakeLists.txt
@@ -36,7 +36,9 @@ add_subdirectory(heinz)
 include(CTest)
 
 add_subdirectory(heinz)
+if (BUILD_TESTING)
 add_subdirectory(test)
+endif()
 
 ## CPack settings.
 
