def test_mutate_increase_revision(self):
        old_rev = self.db.revision
        with self.db.transaction() as tx:
            tx.mutate(
                'INSERT INTO {} '
                '(field_one) '
                'VALUES (?);'.format(ModelFixture1._table),
                (111,),
            )
        self.assertGreater(self.db.revision, old_rev)