Re: Unit test package for Emacs Lisp?

I've grown quite comfortable using the unittest module that comes with Python. In my role as sometimes maintainer of python-mode I'd really like something similar, especially since I really only use XEmacs. I'd like something that I can run like xemacs -batch -load pymode-unittests.el emacs -batch -load pymode-unittests.el and thereby avoid a lot of reliance on others for help testing changes w/ GNU Emacs. I didn't see anything obvious in a quick scan of the xemacs-packages directory, a couple ad hoc test files, but nothing general purpose. Any pointers appreciated.