I there any straightforward way to backtrack from rpsec to test unit mid project?

I have been weighing up the pro/cons of learning rspec (which I think is pretty good) to using Test unit, which I learned while following Michael Hartls excellent tutorial on building a rails application. I am in the middle of my own project and I have set up rspec but I really want to go back to using test unit (I am a rails newbie). Aside from uninstalling the gems, is there anything else I need to do. Is there an easy automated way to generate all the controller, model and view test files (albeit in blank form) that would have been generated as I built the application.