# it

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

Register one test.

```ds title="it"
export function it(name: string, argument?: CaseArgument | undefined, body?: Body | undefined): void
```

[language/library/src/test/case.ds:37:39](https://github.com/destack-sh/destack/blob/main/language/library/src/test/case.ds#L37-L39)