The WPT Dashboard, wpt.fyi, displays results for the web-platform-tests, or WPT, which are a group of test suites for many web platform specifications.

If the web platform as a whole were an engineering project, it'd be crazy not to have a test suite that's run regularly. The goal of the WPT Dashboard is to promote viewing the web platform as one entity and to make identifying and fixing interoperability issues as easy as possible.