Is it possible to tweak Ember blueprints

When writing acceptance tests for our application, we use ember generate to stub out the test (ember generate acceptance-test <name>).

The next step is typically to modify the generated test to call ember-simple-auth-testing's authenticateSession() in the module block (and most likely perform some setup with ember-data-factory-guy).

What I would like to do is make a slight tweak to the acceptance-test blueprint's template, however I can't seem to find any documentation on how to extend blueprints.

Does anyone know if any such documentation exists, or how I might go about doing this?

Thanks!