Are they really adding 2,000 tests a week to their codebase?
And dumping tests it needs for intermediate work steps in your suite to run for all of eternity.. Sometimes it'll create these in tmp, but not always!
Unless you prompt them otherwise, the models tend to write WAY too many useless tests and in the most inefficient ways imaginable. This balloons test counts and lines of code to insane levels and frankly, likely, slowly makes it more and more costly for the AI to make future changes.. To the point it can't wrap its context around the code base and effectively make necessary changes.