# Vitest v4.0.13 — Release & Upgrade Intelligence
- **Product:** Vitest (https://vitest.dev)
- **Version:** v4.0.13
- **Released:** Nov 21, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/vitest/updates/v4.0.13/

## Executive Summary (TL;DR)
Vitest v4.0.13. Source highlight:    🐞 Bug Fixes

## Improvements
- Avoid fetchModule roundtrip if the module is cached &nbsp;-&nbsp; 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 &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9076 <samp>(6b9a1)</samp>

## Bug Fixes
- Don't use type from Vite 7.1 &nbsp;-&nbsp; 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 &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/9068 <samp>(332af)</samp>