The Test Team helps manage testing and triage across the WordPress ecosystem. They focus on user testing of the editing experience and WordPress dashboard, replicating and documenting bug reports, and supporting a culture of review and triage across the project.
CoreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress. 4.2-alpha-31427 and PT 0.0.6-20150212.
Entry point is a bare press-this.php link.