def test_equalityDnssecOK(self):
        """
        Two L{OPTHeader} instances compare equal if they have the same
        dnssecOK flags.
        """
        self.assertNormalEqualityImplementation(
            dns._OPTHeader(dnssecOK=True),
            dns._OPTHeader(dnssecOK=True),
            dns._OPTHeader(dnssecOK=False))

        Two L{OPTHeader} instances compare equal if they have the same
        dnssecOK flags.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_dns.py