[issue16905] Fix test discovery for test_warnings

[Roundup Robot]

Roundup Robot added the comment:

New changeset 20e44464eb86 by Ezio Melotti in branch '3.3':
#16905: test_bufio now works with unittest test discovery.  Initial patch by Berker Peksag.
http://hg.python.org/cpython/rev/20e44464eb86

New changeset 6ee721029fd5 by Ezio Melotti in branch 'default':
#16905: merge with 3.3.
http://hg.python.org/cpython/rev/6ee721029fd5

----------
nosy: +python-dev

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16905>
_______________________________________