https://chromium-review.googlesource.com/c/chromium/src/+/1109400 was an attempt to make metrics_python_tests be able to run a subset of its tests.

It turns out that it can't do this, because of the way typ is being used by the test suite. It already selects a set of tests to run, which means that typ ignores the argument I'm passing, in https://cs.chromium.org/chromium/src/third_party/catapult/third_party/typ/typ/runner.py?q=typ/runner.py&sq=package:chromium&g=0&l=396

Dirk, do you know why this is the case? Can this be changed? I would think the easiest change would be to change the code in typ, but I'd be worried it'd break other code, since that code looks to have been around for years.