def METHOD_NAME(self):
    """
    Tests the functionality of is_eligible_for_financial_aid for an unexpected error
    """
    with patch.object(OAuthAPIClient, 'request') as oauth_mock:
        oauth_mock.return_value = self._mock_response(
            status.HTTP_500_INTERNAL_SERVER_ERROR, {'error': 'unexpected error occurred'}
        )
        is_eligible, reason = is_eligible_for_financial_aid(self.test_course_id)
        assert is_eligible is False
        assert reason == UNEXPECTED_ERROR_IS_ELIGIBLE