# Workers - @cloudflare/vitest-pool-workers is now @cloudflare/vitest-plugin

Publisher-attributed story with a reviewed brief or permitted publisher paragraph. The original publisher is responsible for the linked reporting.

- Publisher: Cloudflare Developers
- Category: Cloud
- Original publication time: 2026-08-19T00:00:00Z
- First observed by NexusTechWire: 2026-10-01T15:54:33Z
- Original source: https://developers.cloudflare.com/changelog/post/2026-08-19-vitest-plugin/
- NexusTechWire record: https://nexustechwire.com/news/news-e047cec5c70929c39366

## From the publisher

Version 1 of the Workers Vitest integration is published as @cloudflare/vitest-plugin ↗︎. The package was formerly named @cloudflare/vitest-pool-workers. The Vitest configuration API is unchanged. Existing projects must update the dependency name, package imports, and TypeScript types entries. To migrate automatically, run: npmyarnpnpm npx @cloudflare/codemods vitest:pool-workers-to-vitest-plugin yarn @cloudflare/codemods vitest:pool-workers-to-vitest-plugin pnpm @cloudflare/codemods vitest:pool-workers-to-vitest-plugin The codemod updates your dependency, imports, and test TypeScript configuration. For manual migration steps, refer to Migrate to Vitest plugin. For outbound request mocks in Workers tests, use the @msw/cloudflare ↗︎ integration. Refer to Mock outbound requests.

Source license: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/). Publisher excerpt shortened and converted to plain text. Original source license applies.

Read the full original: [Cloudflare Developers](https://developers.cloudflare.com/changelog/post/2026-08-19-vitest-plugin/)

This record does not reproduce the complete article or represent independent confirmation of every source claim.