Hello. Jenkins-bot complains in [[ https://gerrit.wikimedia.org/r/#/c/268189/ | this change ]] ([[ https://integration.wikimedia.org/ci/job/mediawiki-extensions-hhvm/48714/console | console output ]]). I don't know where to fix this so the uploaded patch works. Thanks.
When setting the fallback language for `lzh` to `zh-hant`, the following Wikibase test breaks:
```
19:08:45 There was 1 failure:
19:08:45
19:08:45 1) Wikibase\Test\LanguageFallbackChainFactoryTest::testBuildFromBabel with data set #4 (array(array('zh-classical')), array('lzh', 'en'))
19:08:45 Failed asserting that 11 matches expected 2.
19:08:45
19:08:45 mediawiki-extensions-hhvm/src/extensions/Wikidata/extensions/Wikibase/lib/tests/phpunit/LanguageFallbackChainFactoryTest.php:28
19:08:45 mediawiki-extensions-hhvm/src/extensions/Wikidata/extensions/Wikibase/lib/tests/phpunit/LanguageFallbackChainFactoryTest.php:246
19:08:45 mediawiki-extensions-hhvm/src/tests/phpunit/MediaWikiTestCase.php:137
```