send-email: fix non-threaded mails

diff --git a/t/t5406-remote-rejects.sh b/t/t5406-remote-rejects.sh
index 46b2cb4e46d9d8bb2ae8cf2ea5d6b03331d4ac05..59e80a5ea253607bf83ac4eed670744df950eb81 100755 (executable)
--- a/t/t5406-remote-rejects.sh
+++ b/t/t5406-remote-rejects.sh
@@ -17,7 +17,7 @@ test_expect_success 'setup' '
        git commit -a -m 2
 '
 
-test_expect_success 'push reports error' '! git push 2>stderr'
+test_expect_success 'push reports error' 'test_must_fail git push 2>stderr'
 
 test_expect_success 'individual ref reports error' 'grep rejected stderr'