This tag is used to track issues with Jenkins jobs (in the test or gate pipeline of Zuul, or post-merge in Travis CI) that are failing due to the master branch of a WMF-deployed repository having reached a state that is not consistently passing its own tests.

Examples of issues in scope for this tag:

• MediaWiki core tests failing CI due to an intermittently failing unit test in that repository.
• A Wikimedia-deployed extension failing due to core having introduced a restriction (e.g. PHPUnit structure test) that the extension isn't passing yet (usually happens for extensions not in core's extension-gate)
• MediaWiki core tests failing on Travis CI for PHP versions, or database backends, not yet covered by our Jenkins jobs.
• The test infrastructure (e.g. Zuul, Jenkins, Nodepool, Docker) intermittently causing a "test" or "gate" pipeline job to fail on Wikimedia-deployed repository.

This project was previously known as Wikimedia-production-error (Shared Build Failure).