# Vitest v4.0.5 — Release & Upgrade Intelligence
- **Product:** Vitest (https://vitest.dev)
- **Version:** v4.0.5
- **Released:** Oct 29, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/vitest/updates/v4.0.5/

## Executive Summary (TL;DR)
Vitest v4.0.5. Source highlight:    🐞 Bug Fixes

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

## Bug Fixes
- Respect `ssr.noExternal` when externalizing dependencies, fix Svelte and Astro &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8862 <samp>(a4f86)</samp>
- Allow module in --config &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8864 <samp>(b9521)</samp>
- **browser**: Allow `Locator` type in selectOptions element parameter &nbsp;-&nbsp; 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 &nbsp;-&nbsp; by @sapphi-red in https://github.com/vitest-dev/vitest/issues/8863 <samp>(0e858)</samp>
- **pool**: Rename `groupId` to `groupOrder` in error message &nbsp;-&nbsp; by @Yohannfra in https://github.com/vitest-dev/vitest/issues/8856 <samp>(b9aab)</samp>