# Vitest v4.1.6 — Release & Upgrade Intelligence
- **Product:** Vitest (https://vitest.dev)
- **Version:** v4.1.6
- **Released:** May 11, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/vitest/updates/v4.1.6/

## Executive Summary (TL;DR)
Vitest v4.1.6. Source highlight:    🐞 Bug Fixes

## Improvements
- Stringify diff objects only once &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/10276 <samp>(9f7b1)</samp>

## Bug Fixes
- **browser**: Provide project reference in `ToMatchScreenshotResolvePath` &nbsp;-&nbsp; by @macarie and @sheremet-va in https://github.com/vitest-dev/vitest/issues/10138 <samp>(31882)</samp>
- Global `sequence.concurrent: true` with top-level `test(..., { concurrent: false })` + depreacte `sequential` test API and options &nbsp;-&nbsp; by @hi-ogawa, **Codex** and @sheremet-va in https://github.com/vitest-dev/vitest/issues/10196 <samp>(2847d)</samp>
- **browser**: Simplify orchestrator otel carrier &nbsp;-&nbsp; by @hi-ogawa in https://github.com/vitest-dev/vitest/issues/10285 <samp>(18af9)</samp>