[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:81](https://github.com/evoluhq/evolu/blob/dd96d79f1dbe9a49fa12ce8e0aa7d3d0177795ca/packages/common/src/Random.ts#L81)

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

Default seed "evolu".