test: fix unstable test_waiter_manager_wake_up
@@ -1144,7 +1144,7 @@ pub mod tests {
// Waiters2's lifetime can't exceed it timeout.
assert_elapsed(
|| expect_write_conflict(f2.wait().unwrap(), 30.into(), lock_info2, 15.into()),
- 50,
+ 30,
100,
);
tx.send(()).unwrap();
