The two tests are crashing periodically in CI and on buildbots. I suspect the problem is in the _xxsubinterpreters module.
Regardless, I'm disabling the tests temporarily, to reduce the noise as we approach 3.12rc1. I'll be investigating the crashes separately.
# test_xxsubinterpreters covers the remaining Interpreter.run() behavior.
+@unittest.skip('these are crashing, likely just due just to _xxsubinterpreters (see gh-105699)')
class StressTests(TestBase):
# In these tests we generally want a lot of interpreters,