chmod a+x notmuch_fail
test_emacs "(let ((notmuch-command \"$PWD/notmuch_fail\"))
(with-current-buffer \"*Messages*\" (erase-buffer))
chmod a+x notmuch_fail
test_emacs "(let ((notmuch-command \"$PWD/notmuch_fail\"))
(with-current-buffer \"*Messages*\" (erase-buffer))