/usr/lib/python2.7/dist-packages/twisted/words/test/ is in python-twisted-words 13.2.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/twisted/words/test/__init__.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_basechat.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_basesupport.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_domish.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_irc.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_irc_service.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_ircsupport.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabberclient.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabbercomponent.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabbererror.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabberjid.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabberjstrports.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabbersasl.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabbersaslmechanisms.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabberxmlstream.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_jabberxmppstringprep.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_msn.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_oscar.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_service.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_tap.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_xishutil.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_xmlstream.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_xmpproutertap.py
/usr/lib/python2.7/dist-packages/twisted/words/test/test_xpath.py