Fixed #13697 -- Modified multiple_database test to avoid a failure observed under Python 2.6.

        self.assertRaises(ValueError, str, qs.query)

        # Evaluating the query shouldn't work, either

        self.assertRaises(ValueError, list, qs)

        try:

            for obj in qs:

                pass

            self.fail('Iterating over query should raise ValueError')

        except ValueError:

            pass

class TestRouter(object):

    # A test router. The behaviour is vaguely master/slave, but the