Currently EntitySchema tests yield:
08:55:35 Fatal error: Declaration of EntitySchema\Tests\DataAccess\ArrayRevisionLookup::getPreviousRevision() must be compatible with that of MediaWiki\Revision\RevisionLookup::getPreviousRevision() in /workspace/src/extensions/EntitySchema/tests/phpunit/DataAccess/ArrayRevisionLookup.php on line 16
(https://integration.wikimedia.org/ci/job/quibble-vendor-mysql-hhvm-docker/47529/console)