[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Worker](https://evolu.dev/docs/api-reference/common/Worker) › testWaitForWorkerMessage

```ts
function testWaitForWorkerMessage(): Promise<void>;
```

Defined in: [packages/common/src/Worker.ts:406](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Worker.ts#L406)

Waits long enough for multi-hop in-memory worker message delivery in tests.

Some flows require several queued macrotasks across worker/message-port
boundaries; this helper advances that pipeline deterministically.