---
description: Migrate to using the Workers Vitest integration.
title: Migration guides
image: https://developers.cloudflare.com/og-docs.png
---

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> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/workers/llms.txt  
> Use this file to discover all available pages before exploring further.

# Migration guides

Last updated Aug 24, 2026|Copy as Markdown|[View as Markdown](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/workers/testing/vitest-integration/migration-guides/index.md)|[Agent setup](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/agent-setup/)

* [Migrate to Vitest plugin](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/workers/testing/vitest-integration/migration-guides/migrate-to-vitest-plugin/)
* [Migrate from Vitest 3 to Vitest 4](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/workers/testing/vitest-integration/migration-guides/migrate-from-vitest-3-to-vitest-4/)
* [Migrate from Miniflare 2's test environments](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/workers/testing/vitest-integration/migration-guides/migrate-from-miniflare-2/)
* [Migrate from unstable\_dev](https://docs-durable-objects-instance-replaced-errors.previews.developers.cloudflare.com/workers/testing/vitest-integration/migration-guides/migrate-from-unstable-dev/)

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