Vitest v0.28.0 — 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 - Don't rely on environment for interopDefault  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2682 [<samp>(3f20c)</samp>](https://github.com/vitest-dev/vitest/commit/3f20cf5a)

Read the original context ↗

Source flags breaking changes — review applicability

📄 .MD

🔧 Bug Fixes 1 ⚠️ Breaking & Deprecations 1

⚡ Executive Summary (TL;DR)

Vitest v0.28.0. Source highlight:    🚨 Breaking Changes

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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.

⚠️ Breaking Changes & Deprecations (1)

   🚨 Breaking Changes - Don't rely on environment for interopDefault  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2682 [<samp>(3f20c)</samp>](https://github.com/vitest-dev/vitest/commit/3f20cf5a)

🔧 Bug Fixes & Patches (1)

**coverage**: C8 to log warning when run in Stackblitz  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/2735 <samp>(b6c41)</samp>

📄 View Raw Release Notes (Original Developer Log)

###    🚨 Breaking Changes - Don't rely on environment for interopDefault  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2682 [<samp>(3f20c)</samp>](https://github.com/vitest-dev/vitest/commit/3f20cf5a) - Move test runner into a separate package  -  by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2721 [<samp>(482b7)</samp>](https://github.com/vitest-dev/vitest/commit/482b72fc) - To extend text context, you need to augment `@vitet/runner` package instead of `vitest` ###    🐞 Bug Fixes - **coverage**: C8 to log warning when run in Stackblitz  -  by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/2735 [<samp>(b6c41)</samp>](https://github.com/vitest-dev/vitest/commit/b6c41caa) #####     [View changes on GitHub](https://github.com/vitest-dev/vitest/compare/v0.27.3...v0.28.0)

← Older Version Vitest v0.27.3 Newer Version → Vitest v0.28.1