1 files changed, 6 insertions, 0 deletions

diff --git a/test/src/emacs-module-tests.el b/test/src/emacs-module-tests.el
index 1eebb418cf3..621229c62aa 100644
--- a/test/src/emacs-module-tests.el
+++ b/test/src/emacs-module-tests.el
@@ -500,4 +500,10 @@ See Bug#36226."
   (should (eq (mod-test-identity 123) 123))
   (should-not (call-interactively #'mod-test-identity)))
 
+(ert-deftest module/unibyte ()
+  (let ((result (mod-test-return-unibyte)))
+    (should (stringp result))
+    (should (not (multibyte-string-p (mod-test-return-unibyte))))
+    (should (equal result "foo\x00zot"))))
+
 ;;; emacs-module-tests.el ends here