In Jenkins, currently it tries to run all the tests in the extensions/Wikibase directory. We have a non-standard setup with 3 extensions there: Wikibase Client, Lib and Repo.
Normally, you would install just the Lib + Repo for a repo wiki (e.g. wikidata.org) and separately install just Lib + Client for a client wiki (e.g. wikipedia).
The test settings, thus, specify just Lib and Repo extensions be enabled but Jenkins still tries to run client tests. This will obviously fail as classes are missing, etc.
Version: wmf-deployment
Severity: normal