def test_unixEpoch(self):
        """
        L{SerialNumber.toRFC4034DateString} stores 32bit timestamps relative to
        the UNIX epoch.
        """
        self.assertEqual(
            SerialNumber(0).toRFC4034DateString(),
            '19700101000000'
        )

        L{SerialNumber.toRFC4034DateString} stores 32bit timestamps relative to
        the UNIX epoch.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_rfc1982.py