# Vitest v4.0.3 — Release & Upgrade Intelligence
- **Product:** Vitest (https://vitest.dev)
- **Version:** v4.0.3
- **Released:** Oct 24, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/vitest/updates/v4.0.3/

## Executive Summary (TL;DR)
Vitest v4.0.3. Source highlight:    🐞 Bug Fixes

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