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-rw-r--r--lisp/emacs-lisp/ert-x.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/ert-x.el b/lisp/emacs-lisp/ert-x.el
index ee561d5b953..d09d3ae11e3 100644
--- a/lisp/emacs-lisp/ert-x.el
+++ b/lisp/emacs-lisp/ert-x.el
@@ -321,7 +321,7 @@ code under test from the behavior of the *Messages* buffer."
COLLECTOR will be called with the message before it is passed
to the real `message'."
(lambda (func &rest args)
- (if (or (null args) (equal (car args) ""))
+ (if (or (null args) (member (car args) '("" nil)))
(apply func args)
(let ((msg (apply #'format-message args)))
(funcall collector (concat msg "\n"))