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

```ts
function testCreateWebSocket(options?: {
  isOpen?: boolean;
  throwOnCreate?: boolean;
}): TestCreateWebSocket;
```

Defined in: [packages/common/src/WebSocket.ts:381](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/WebSocket.ts#L381)

Creates [TestCreateWebSocket](https://evolu.dev/docs/api-reference/common/WebSocket/interfaces/TestCreateWebSocket).