ember‑concurrency‑test‑waiter is an Ember addon that lets you mark ember‑concurrency tasks as test waiters so Ember’s test helpers ( `settled()` / `wait()` ) pause until those tasks finish. It provides a `withTestWaiter` wrapper or task‑modifier (and a TypeScript type shim) for developers who need their async task logic to be accounted for in integration and acceptance tests. The project is now deprecated in favor of using the `@ember/test-waiters` `waitFor` decorator directly on tasks.