Can module spec use fixtures?

Good morning, dear fellows:
    I'd like to recall one question I posted yesterday. I am writing specs for ruby modules. Some of the modules do some data process in the test database. Because 'fixtures' is undefined (Am I correct?) in module specs, spec of certain module (e.g. delete data form database) will affect other specs of other modules (e.g. try to access the deleted data). My observation is all the modules specs share only a copy of test data.
    If I am correct, are there any way of avoiding this, and providing a copy of initial test data (like fixtures do) for each module spec?
    Thanks
    Regards.