- tests/test_issue765_streaming_persistence.py — replace timing-based polling
in test_checkpoint_fires_on_activity_counter_increment with deterministic
threading.Event-driven sync. The old version used time.sleep(0.15)+(0.25)+(0.25)
with a 0.1s polling thread, which under CI scheduling jitter could miss the
second increment and complete with only 1 save instead of 2. Now waits up
to 3.0s for save_count to advance to the target after each increment.
Locally observed flake on Python 3.11 in CI run 25175204451.
- tests/test_pr1339_fallback_providers_list.py — new structural test that
asserts streaming.py handles both legacy fallback_model (single dict) and
new fallback_providers (list form) without calling .get() on a list. Three
assertions: both keys consulted, list-form has explicit isinstance check,
_fallback_resolved defaults to None.
