Code review comment for lp://staging/~cjwatson/meliae/py3-old-style-classes

Incidentally, unittest.skipIf requires Python >= 2.7. If you think 2.6 support is still important then I can try to come up with some variant approach, but given https://devguide.python.org/devcycle/#end-of-life-branches it didn't seem likely to be a problem.