#93649 and associated PRs split up _testcapimodule.c because the file is large and hard to maintain. I'm proposing splitting the tests for the internal C API (Modules/_testinternalcapi.c) in the same manner for the same reasons. Additionally, I expect the PRs related to PEP 703 to require additional internal C API tests, and I'd like to avoid further cluttering _testinternalcapi.c.

cc @encukou @vstinner

Linked PRs

• gh-108777: Split _PyTime tests from _testinternalcapi.c #108787