11:41:14 1) PageImages\Tests\PageImagesTest::testGivenNonExistingPageOnBeforePageDisplayDoesNotAddMeta
11:41:14 Only variables should be passed by reference
11:41:14 
11:41:14 /home/jenkins/workspace/mwext-testextension-php70-jessie-non-voting/src/extensions/PageImages/tests/phpunit/PageImagesTest.php:52
11:41:14 /home/jenkins/workspace/mwext-testextension-php70-jessie-non-voting/src/tests/phpunit/MediaWikiTestCase.php:420
11:41:14 /home/jenkins/workspace/mwext-testextension-php70-jessie-non-voting/src/maintenance/doMaintenance.php:94