See https://integration.wikimedia.org/ci/job/mwext-testextension-hhvm/33729/console
```
19:35:19 There were 3 failures:
19:35:19
19:35:19 1) ApiDocumentationTest::testDocumentationExists with data set "Module pageslist with MiserMode=false, AllowCategorizedRecentChanges=false" ('pageslist', array(false, false))
19:35:19 Module description message apihelp-pageslist-description exists
19:35:19 Failed asserting that false is true.
19:35:19
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/tests/phpunit/structure/ApiDocumentationTest.php:51
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/tests/phpunit/structure/ApiDocumentationTest.php:80
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/tests/phpunit/MediaWikiTestCase.php:399
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/maintenance/doMaintenance.php:111
19:35:19
19:35:19 2) ApiDocumentationTest::testDocumentationExists with data set "Module pageslist with MiserMode=true, AllowCategorizedRecentChanges=true" ('pageslist', array(true, true))
19:35:19 Module description message apihelp-pageslist-description exists
19:35:19 Failed asserting that false is true.
19:35:19
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/tests/phpunit/structure/ApiDocumentationTest.php:51
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/tests/phpunit/structure/ApiDocumentationTest.php:80
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/tests/phpunit/MediaWikiTestCase.php:399
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/maintenance/doMaintenance.php:111
19:35:19
19:35:19 3) Warning
19:35:19 The data provider specified for ResourcesTest::testFileExistence is invalid.
19:35:19 ResourceLoaderFileModule::readStyleFile: style file not found: "/srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/extensions/PagesList/modules/DataTables/media/css/jquery.dataTables.css"
19:35:19
19:35:19 /srv/jenkins-workspace/workspace/mwext-testextension-hhvm/src/maintenance/doMaintenance.php:111
19:35:19
19:35:19 FAILURES!
```