The Queue tests measured real setTimeout wall-clock time and asserted
elapsed < 2 * threshold. On busy CI runners a 2400ms timer can take
longer than 4800ms to fire, failing the assertion intermittently (seen
in downstream validation runs). Switch to jest's modern fake timers so
elapsed is exactly the timeout delay: the tests are deterministic and
no longer spend ~5 seconds of real time waiting.
Alireza
9329dd5b55