diff --git a/test/src/process-tests.el b/test/src/process-tests.el
index 29e9d3323ce..2cc5b37b187 100644
--- a/test/src/process-tests.el
+++ b/test/src/process-tests.el
@@ -108,7 +108,7 @@ process to complete."
 	      (goto-char (point-min))
               ;; Instrument for bug#80166.
               (when (getenv "EMACS_EMBA_CI")
-                (message "stderr\n%s" (buffer-string))
+                (message "stderr\n%s" (buffer-string)))
 	      (looking-at "hello stderr!"))))))
 
 (ert-deftest process-test-stderr-filter ()