Configure tox to package your project as a wheel during testing; this avoids pip repackaging a .tar.gz file to a wheel for each test environment.

After porting feedparser to Python 3, I've consistently tested every change on Python 2.4 through Python 3.1. That's four versions of Python 2, and two versions of Python 3. I've also started creating coverage reports for each test run, so I can ensure that the tests are reasonably …