When running phpcs from the command line, it fails with an error:
> vendor/bin/phpcs includes/content/ContentHandler.php ERROR: Referenced sniff "Universal.Constants.LowercaseClassResolutionKeyword" does not exist
Running composer lint does not fail ,since that doesn't use phpc. It uses the vendor/bin/parallel-lint, which doesn't have the issue.
Also triggers an error in PHPStorm:
xref rMCSNdb786d224aad: Add first batch of rules from the PHPCSExtra standards and T349327: Audit PHPCSExtra to see if there are any sniffs we may want to add to our ruleset.