'``FlockerConfiguration.is_valid_format`` returns ``False`` if the
supplied configuration for a single application is not a ``dict``.'

def test_not_valid_on_application_not_dict(self):

    config = {u'version': 1, u'applications': {u'postgres': u'a    string'}}
    parser = FlockerConfiguration(config)
    self.assertFalse(parser.is_valid_format())
