# What changed in jest-preset-stylelint

> 3 changes in jest-preset-stylelint 9 from its official release notes, upgrade guides and advisories. Each one cited. Sources checked 2026-10-25. HTML: https://unstale.sh/npm/jest-preset-stylelint/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## jest-preset-stylelint 9

### Behavior and default changes

- The jest peer dependency is now optional, so it is no longer required to install the package. (9.1.0) — [release notes](https://github.com/stylelint/jest-preset-stylelint/releases/tag/9.1.0)
- The stylelint peer dependency is now optional, so it is no longer required to install the package. (9.1.0) — [release notes](https://github.com/stylelint/jest-preset-stylelint/releases/tag/9.1.0)

### Tooling

- Adds support for testing referenceFiles. (9.2.0) — [release notes](https://github.com/stylelint/jest-preset-stylelint/releases/tag/9.2.0)