It's a bit of everything, spread across many tests. There's a couple of heavy hitters but it's mostly that we have more and more tests and todo_wine. You can get the reports with the "raw report" link on the top of individual pages, or with the URL pattern `https://test.winehq.org/data/<commit>/<runner>/report`, where <runner> is the name of the machine/test flavor on https://test.winehq.org/data/patterns.html.