diff --git a/t/t4014-format-patch.sh b/t/t4014-format-patch.sh
index 531f5b795c..437807e41e 100755
--- a/t/t4014-format-patch.sh
+++ b/t/t4014-format-patch.sh
@@ -515,4 +515,9 @@ test_expect_success 'format-patch --signoff' '
 	grep "^Signed-off-by: $GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"
 '
 
+test_expect_success 'format-patch -- <path>' '
+	git format-patch master..side -- file 2>error &&
+	! grep "Use .--" error
+'
+
 test_done