Hi Tyler,

Abstract is a generic model that implements some feature that can then be inherited by regular models in order to make that feature available in them.
So if you want to test abstract model you need to inherit this inside regular model(models.model).
For reference you can look for mail.thread.

Usually you create a dummy class that inherits the abstract class and use it for unit testing but in Odoo you don't want test tables in your database. So the trick is to create a distinct module for the sole testing purpose and which you will install on a test database but not on a production database. For example, the mass_mailing application does not have any unit test for its abstract classes. The tests are located in another module called test_mass_mailing which has a models package with some test classes.