Vitest v4.0.13 — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: vitest · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-11-01.

Compatibility not verified — check source notes

📄 .MD

⚡ Improvements 2 🔧 Bug Fixes 2

⚡ Executive Summary (TL;DR)

Vitest v4.0.13. Source highlight:    🐞 Bug Fixes

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Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

⚡ Performance & Enhancements (2)

Avoid fetchModule roundtrip if the module is cached  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9075 <samp>(b27e0)</samp>
**experimental**: If `fsCacheModule` is enabled, read from the memory when possible  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9076 <samp>(6b9a1)</samp>

🔧 Bug Fixes & Patches (2)

Don't use type from Vite 7.1  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9071 <samp>(6356b)</samp>
Don't import node.js dependent types in vitest/browser  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9068 <samp>(332af)</samp>

📄 View Raw Release Notes (Original Developer Log)

###    🐞 Bug Fixes - **types**: - Don't use type from Vite 7.1  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9071 [<samp>(6356b)</samp>](https://github.com/vitest-dev/vitest/commit/6356b1d38) - Don't import node.js dependent types in vitest/browser  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9068 [<samp>(332af)</samp>](https://github.com/vitest-dev/vitest/commit/332afa0de) ###    🏎 Performance - Avoid fetchModule roundtrip if the module is cached  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9075 [<samp>(b27e0)</samp>](https://github.com/vitest-dev/vitest/commit/b27e002e5) - **experimental**: If `fsCacheModule` is enabled, read from the memory when possible  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9076 [<samp>(6b9a1)</samp>](https://github.com/vitest-dev/vitest/commit/6b9a1b5b1) #####     [View changes on GitHub](https://github.com/vitest-dev/vitest/compare/v4.0.12...v4.0.13)

← Older Version Vitest v4.0.12 Newer Version → Vitest v4.0.14