Oh, don't worry about time between responses, we all have lives (well, some of us anyhow :) ).

After looking at Lib/test/test_dis.py, I think it's just an oversight that there is no specific findlabels test (it's tested implicitly by ``dis.dis`` after all), and it would be good thing for you to add one.  The obvious place seems like a new method at the bottom of the ``DisTests`` class, but we'll have to rely on (probably) Yury to make that call.