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

```ts
type TestCreateId = <B>() => [B] extends [never] ? Id : Id & Brand<B>;
```

Defined in: [packages/common/src/Test.ts:15](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Test.ts#L15)