diff --git a/test/lisp/emacs-lisp/ert-tests.el b/test/lisp/emacs-lisp/ert-tests.el
index 1aff73d66f6..2f8e7382bea 100644
--- a/test/lisp/emacs-lisp/ert-tests.el
+++ b/test/lisp/emacs-lisp/ert-tests.el
@@ -583,6 +583,7 @@ ert-test-run-tests-batch
 		   (setq found-long (string-match long-text msg)))
 		 (unless found-complex
 		   (setq found-complex (string-match complex-text msg))))
+        (should nil)
 	(should found-long)
 	(should found-complex)))))