--- CMakeLists.txt.orig	2023-07-08 00:20:16 UTC
+++ CMakeLists.txt
@@ -76,7 +76,7 @@ if(EXISTS ${CMAKE_SOURCE_DIR}/doc/CMakeLists.txt)
 endif()
 
 if(EXISTS ${CMAKE_SOURCE_DIR}/tests/CMakeLists.txt)
-  set(DEAL_II_HAVE_TESTS_DIRECTORY TRUE)
+  set(DEAL_II_HAVE_TESTS_DIRECTORY ${FREEBSD_ENABLE_TESTS})
 endif()
 
 #