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

```ts
function testCreateRandom(seed?: string): Random;
```

Defined in: [packages/common/src/Random.ts:49](https://github.com/evoluhq/evolu/blob/e7144e2bbe9069362b62dec1b64a8aa922b8f1b0/packages/common/src/Random.ts#L49)

Creates a seeded [Random](https://evolu.dev/docs/api-reference/common/Random/interfaces/Random) for deterministic tests. Default seed "evolu".