def METHOD_NAME(self, mock_retry):
    mock_retry.return_value = "notified"
    call_command("retry_notifications")
    self.assertEqual(mock_retry.call_count, 1)
    call_command("retry_notifications", "--days", "2")
    self.assertEqual(mock_retry.call_count, 2)
    self.assertTrue(mock_retry.called_with(days=2))