About a dozen times a day, unit tests fail because of this:
https://integration.wikimedia.org/ci/job/mediawiki-phpunit-hhvm-trusty/2647/console
09:51:12
09:51:12 Time: 1.76 minutes, Memory: 273.73MB
09:51:12
09:51:12 There was 1 failure:
09:51:12
09:51:12 1) MediaWikiPageNameNormalizerTest::testNormalizePageTitle with data set "universe (Q1)" ('Q1', 'Q1')
09:51:12 Failed asserting that false is identical to 'Q1'.
09:51:12
09:51:12 /home/jenkins/workspace/mediawiki-phpunit-hhvm-trusty/src/tests/phpunit/includes/site/MediaWikiPageNameNormalizerTest.php:66
09:51:12Please fix or (temporarily) disable the test as soon as possible.
MediaWikiPageNameNormalizerTest was added in 4c574daa45 (@hoo, @Legoktm).