⚠️ Breaking Change
Impact Score: 7/10
Vitest v0.16.0 — 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.
Breaking-change evidence from the source
🚨 Breaking Changes - Rename mock types to match jest's [`#1525`](https://github.com/vitest-dev/vitest/issues/1525) by @sheremet-va
⚡ Executive Summary (TL;DR)
Vitest v0.16.0. Source highlight: 🚨 Breaking Changes
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.
⚠️ Breaking Changes & Deprecations (1)
- 🚨 Breaking Changes - Rename mock types to match jest's [`#1525`](https://github.com/vitest-dev/vitest/issues/1525) by @sheremet-va
✨ New Features & Capabilities (1)
- VITEST_POOL_ID cannot be the same between different running specs `#1531`
🔧 Bug Fixes & Patches (3)
- Align hooks return types with their behaviour `#1522`
- Replace ?& with ? when normalizing id `#1529`
- ToFilePath with abs path in root `#1538`
📄 View Raw Release Notes (Original Developer Log)
### 🚨 Breaking Changes
- Rename mock types to match jest's [`#1525`](https://github.com/vitest-dev/vitest/issues/1525) by @sheremet-va
### 🚀 Features
- VITEST_POOL_ID cannot be the same between different running specs [`#1531`](https://github.com/vitest-dev/vitest/issues/1531) by @sheremet-va
### 🐞 Bug Fixes
- Align hooks return types with their behaviour [`#1522`](https://github.com/vitest-dev/vitest/issues/1522) by @sheremet-va
- Replace ?& with ? when normalizing id [`#1529`](https://github.com/vitest-dev/vitest/issues/1529) by @sheremet-va
- ToFilePath with abs path in root [`#1538`](https://github.com/vitest-dev/vitest/issues/1538) by @KentoMoriwaki
##### [View changes on GitHub](https://github.com/vitest-dev/vitest/compare/v0.15.2...v0.16.0)