def METHOD_NAME(self):
    c = ZentralSettings({"api": {"tls_hostname": "https://zentral",
                                 "tls_hostname_for_client_cert_auth": "https://zentral-mtls"}})
    self.assertEqual(c["api"]["fqdn"], "zentral")
    self.assertEqual(c["api"]["fqdn_mtls"], "zentral-mtls")