--- CMakeLists.txt.orig	2023-01-24 07:39:32 UTC
+++ CMakeLists.txt
@@ -42,7 +42,9 @@ message(STATUS "LibHeinz: found=${LibHeinz_FOUND}, inc
 include(CTest)
 
 add_subdirectory(ff)
+if (BUILD_TESTING)
 add_subdirectory(test)
+endif()
 
 ## CPack settings.
 
