Ticket to track issues that come up in connection with re-enabling parallel PHPUnit testing for PHP7.4 jobs.
Create empty commits to test CI for the following projects:
172 mediawiki/extensions/GrowthExperiments, 140 mediawiki/extensions/Wikibase, 74 mediawiki/extensions/Translate, 73 mediawiki/extensions/ContentTranslation, 69 mediawiki/extensions/CentralAuth, 62 mediawiki/extensions/Cite, 52 mediawiki/extensions/GlobalBlocking, 48 mediawiki/extensions/AutoModerator, 48 mediawiki/extensions/AbuseFilter, 44 mediawiki/extensions/CheckUser, 42 mediawiki/extensions/CommunityRequests, 32 mediawiki/extensions/ThrottleOverride, 30 mediawiki/extensions/WikiLambda, 30 mediawiki/extensions/OAuth, 28 mediawiki/extensions/WikibaseLexeme, 28 mediawiki/extensions/Sanctions, 26 mediawiki/extensions/WikimediaCampaignEvents, 26 mediawiki/extensions/EventLogging, 23 mediawiki/extensions/Scribunto, 23 mediawiki/extensions/ExternalData,
Merge the pending change to Zuul ( https://gerrit.wikimedia.org/r/1076148 ), then retest these extensions