def METHOD_NAME(self):
    """ Testing FedAverage save state """
    expected_state = {'class': 'FedAverage',
                      'module': 'fedbiomed.researcher.aggregators.fedavg',
                      'parameters': None}
    state = self.aggregator.save_state()
    self.assertDictEqual(expected_state, state, 'State of FedAvg has not been saved correctly')