# caseOnly

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

Register one focused test.

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

[language/library/src/test/case.ds:47:49](https://github.com/destack-sh/destack/blob/main/language/library/src/test/case.ds#L47-L49)