# CaseArgument

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

Test registration argument after the test name.

```ds title="CaseArgument"
export type CaseArgument = Body | Options | Duration
```

[language/library/src/test/case.ds:9](https://github.com/destack-sh/destack/blob/main/language/library/src/test/case.ds#L9)