diff --git a/CGAL_Core/include/CGAL/CORE/Config.h b/CGAL_Core/include/CGAL/CORE/Config.h
index d55b5edfcb9..9f49a7f5986 100644
--- a/CGAL_Core/include/CGAL/CORE/Config.h
+++ b/CGAL_Core/include/CGAL/CORE/Config.h
@@ -30,7 +30,9 @@
 #include <CGAL/export/CORE.h>
 
 #ifdef CGAL_TEST_SUITE
-#define CGAL_CORE_warning_msg(X ,Y) CGAL_error_msg(Y)
+// disabled for the testsuite to avoid `w`
+#define CGAL_CORE_warning_msg(X ,Y)
+// if (!(X)) CGAL_error_msg(Y)
 #else
 #define CGAL_CORE_warning_msg(X ,Y) CGAL_warning_msg(X ,Y)
 #endif