# Schedule

`import { Schedule } from "destack:test";`

Test scheduling policy.

```ds title="Schedule"
export type Schedule = { concurrency?: Concurrency; isolation?: Isolation; retries?: uint32 }
```

[language/library/src/test/options.ds:37:46](https://github.com/destack-sh/destack/blob/main/language/library/src/test/options.ds#L37-L46)