Vitest v4.0.3 — 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

🔧 Bug Fixes 4

⚡ Executive Summary (TL;DR)

Vitest v4.0.3. 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.

🔧 Bug Fixes & Patches (4)

Preserve reporter options from config when CLI reporters override them  -  by @Copilot and **sheremet-va** in https://github.com/vitest-dev/vitest/issues/8794 <samp>(15552)</samp>
**browser**: More stable in-source testing validation  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8793 <samp>(62297)</samp>
**happy-dom**: Support fetch globals  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8791 <samp>(0fb74)</samp>
**init**: Use correct jsx/tsx extension  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8792 <samp>(abc04)</samp>

📄 View Raw Release Notes (Original Developer Log)

###    🐞 Bug Fixes - Preserve reporter options from config when CLI reporters override them  -  by @Copilot and **sheremet-va** in https://github.com/vitest-dev/vitest/issues/8794 [<samp>(15552)</samp>](https://github.com/vitest-dev/vitest/commit/155521a85) - **browser**: More stable in-source testing validation  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8793 [<samp>(62297)</samp>](https://github.com/vitest-dev/vitest/commit/622977e61) - **happy-dom**: Support fetch globals  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8791 [<samp>(0fb74)</samp>](https://github.com/vitest-dev/vitest/commit/0fb74bd3b) - **init**: Use correct jsx/tsx extension  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/8792 [<samp>(abc04)</samp>](https://github.com/vitest-dev/vitest/commit/abc046f95) #####     [View changes on GitHub](https://github.com/vitest-dev/vitest/compare/v4.0.2...v4.0.3)

← Older Version Vitest v4.0.2 Newer Version → Vitest v4.0.4