Last modified: 2014-09-02 10:50:33 UTC
It first appeared here, on the py2.7 build only https://travis-ci.org/wikimedia/pywikibot-core/jobs/29067805 And then in the next build it disappeared. It is back again: https://travis-ci.org/wikimedia/pywikibot-core/jobs/29843942 This is almost certainly a problem with the utility method get_test_unconnected_page, which is a rough hack and should be replaced with a generator, or made more robust.
https://gerrit.wikimedia.org/r/#/c/148004/ has a related changeset.