def METHOD_NAME(self, app, session):
    # UK GeoIP with ambiguous US mcc
    uk_cell = CellShardFactory.build(mcc=234)
    us_cell = CellShardFactory(mcc=310)
    session.flush()
    query = self.model_query(cells=[us_cell])
    res = self._call(app, body=query, ip=self.test_ip)
    self.check_model_response(res, uk_cell, region="GB", fallback="ipf")