Tests using the same machine-wide resource should not run in parallel

`sys._clear_internal_caches()` no longer clears the type cache

Inconsistent error messages between parse_args and documentation

asyncio: eager_start Task created from a thread not running the target loop silently corrupts that loop's current-task tracking (3.12, 3.13; guarded in 3.14)

`\p{...}` gives wrong results when mixed with letters under `re.IGNORECASE`

test_zipfile can fail if SOURCE_DATE_EPOCH is set

3.15 regression: `Popen.wait(timeout=float("inf"))` raises `TypeError: timeout must be a real number or None` on macOS/BSD (new kqueue wait path)

Format attribute name with repr() when formatting AttributeError error message

test_invalid_utf8_arg fails in non-UTF-8 multibyte locales

time.strftime() returns a wrong ISO 8601 week number (%V) on OpenBSD