Vitest v4.0.5 — 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 5

⚡ Executive Summary (TL;DR)

Vitest v4.0.5. 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)

Pass testfiles at once when `--no-isolate --maxWorkers=1`  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/8835 <samp>(584aa)</samp>
**expect**: Optimize checking the input type  -  by @Connormiha in https://github.com/vitest-dev/vitest/issues/8840 <samp>(06968)</samp>

🔧 Bug Fixes & Patches (5)

Respect `ssr.noExternal` when externalizing dependencies, fix Svelte and Astro  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8862 <samp>(a4f86)</samp>
Allow module in --config  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8864 <samp>(b9521)</samp>
**browser**: Allow `Locator` type in selectOptions element parameter  -  by @rzzf and @sheremet-va in https://github.com/vitest-dev/vitest/issues/8848 <samp>(7ee28)</samp>
**module-runner**: Don't return node builtins for `getBuiltins` unconditionally  -  by @sapphi-red in https://github.com/vitest-dev/vitest/issues/8863 <samp>(0e858)</samp>
**pool**: Rename `groupId` to `groupOrder` in error message  -  by @Yohannfra in https://github.com/vitest-dev/vitest/issues/8856 <samp>(b9aab)</samp>

📄 View Raw Release Notes (Original Developer Log)

###    🐞 Bug Fixes - Respect `ssr.noExternal` when externalizing dependencies, fix Svelte and Astro  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8862 [<samp>(a4f86)</samp>](https://github.com/vitest-dev/vitest/commit/a4f86f1ba) - Allow module in --config  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8864 [<samp>(b9521)</samp>](https://github.com/vitest-dev/vitest/commit/b9521e0c2) - **browser**: Allow `Locator` type in selectOptions element parameter  -  by @rzzf and @sheremet-va in https://github.com/vitest-dev/vitest/issues/8848 [<samp>(7ee28)</samp>](https://github.com/vitest-dev/vitest/commit/7ee283c96) - **module-runner**: Don't return node builtins for `getBuiltins` unconditionally  -  by @sapphi-red in https://github.com/vitest-dev/vitest/issues/8863 [<samp>(0e858)</samp>](https://github.com/vitest-dev/vitest/commit/0e858bab4) - **pool**: Rename `groupId` to `groupOrder` in error message  -  by @Yohannfra in https://github.com/vitest-dev/vitest/issues/8856 [<samp>(b9aab)</samp>](https://github.com/vitest-dev/vitest/commit/b9aabf4e6) ###    🏎 Performance - Pass testfiles at once when `--no-isolate --maxWorkers=1`  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/8835 [<samp>(584aa)</samp>](https://github.com/vitest-dev/vitest/commit/584aa7148) - **expect**: Optimize checking the input type  -  by @Connormiha in https://github.com/vitest-dev/vitest/issues/8840 [<samp>(06968)</samp>](https://github.com/vitest-dev/vitest/commit/0696898b4) #####     [View changes on GitHub](https://github.com/vitest-dev/vitest/compare/v4.0.4...v4.0.5)

← Older Version Vitest v4.0.4 Newer Version → Vitest v4.0.6