@utils.patch_args([
        "mesos-tail",
        "-q",
        "app"
    ])
    def test_hide_header(self):
        mesos.cli.cmds.tail.main()

        assert len(self.lines) is not 9
dataset/ETHPy150Open mesosphere/mesos-cli/tests/integration/test_tail.py/TestTail.test_hide_header/operator `==` -> `is not`