def METHOD_NAME(self, mock_time):
    mock_time.return_value = datetime.utcnow().replace(tzinfo=utc)
    self._publish_transportation_form_and_submit_instance()
    xform_id_string = XForm.objects.all()[0].id_string
    instances = Instance.objects.all()
    for instance in instances:
        self.assertEqual(instance.json[SUBMISSION_TIME],
                         mock_time.return_value.strftime(MONGO_STRFTIME))
        self.assertEqual(instance.json[XFORM_ID_STRING],
                         xform_id_string)