self = <ipatests.test_integration.test_external_ca.TestSelfExternalSelf object at 0x7f5bd0b8f310>

    def test_switch_back_to_self_signed(self):

        # for journalctl --since
        switch_time = time.strftime('%H:%M:%S')
        # switch back to self-signed CA
        result = self.master.run_command([paths.IPA_CACERT_MANAGE, 'renew',
                                          '--self-signed'])
        assert result.returncode == 0

        # Confirm there is no traceback in the journal
        result = match_in_journal(self.master, since=switch_time,
                                  string='Traceback')
        assert not bool(result), ('"Traceback" keyword found in the journal.'
                                  'Please check further')

        # Check if pki-tomcatd was started after switching back.
        result = match_in_journal(self.master, since=switch_time,
                                  string=PKI_START_STR)
>       assert bool(result), ('pki_tomcatd not started after switching back to'
                              'self-signed CA')
E       AssertionError: pki_tomcatd not started after switching back toself-signed CA
E       assert False
E        +  where False = bool(None)