The site_detect tests started failing to detect http://guildwars.wikia.com/ on October 5, 2015, and the 'wikia' builds also started skipping tests using the wikia site, reporting HTTP 403: You are not allowed to access this resource
https://travis-ci.org/wikimedia/pywikibot-core/builds/83661682
This has continued for two days now.
This has exposed an unrelated bug in cosmetic_changes (to be fixed in https://gerrit.wikimedia.org/r/#/c/244055/), where it was using the Wikia site instead of the intended site de.wikipedia, causing tests.cosmetic_changes_tests.TestCosmeticChanges.test_fixTypo to be a failure in the wikia builds.