# Vitest v0.27.0 — Release & Upgrade Intelligence
- **Product:** Vitest (https://vitest.dev)
- **Version:** v0.27.0
- **Released:** Jan 09, 2023
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/vitest/updates/v0.27.0/

## Executive Summary (TL;DR)
Vitest v0.27.0. Source highlight:    🚨 Breaking Changes

## Breaking Changes & Deprecations
- &nbsp;&nbsp;&nbsp;🚨 Breaking Changes - Deprecate "error" on result, store errors in "errors" &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2586 [<samp>(e641a)</samp>](https://github.com/vitest-dev/vitest/commit/e641a110)

## New Features
- **coverage**: report only changed files when using istanbul coverage with watch mode &nbsp;-&nbsp; by @g4rry420 in https://github.com/vitest-dev/vitest/issues/2385 <samp>(bf872)</samp>

## Improvements
- Improve vi.mock performance &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2594 <samp>(09d19)</samp>

## Bug Fixes
- Return mock path only when mocked &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2619 <samp>(f8ac2)</samp>
- Allow mocking CJS module with interoped default &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2598 <samp>(6b3e3)</samp>
- Avoid random ENOTEMPTY errors &nbsp;-&nbsp; by @AriPerkkio in https://github.com/vitest-dev/vitest/issues/2620 <samp>(59766)</samp>
- Always inline assets and modules with special Vite queries &nbsp;-&nbsp; by @sheremet-va in https://github.com/vitest-dev/vitest/issues/2617 <samp>(fed1c)</samp>
- Allow overrides reporter via cli option &nbsp;-&nbsp; by @mysteryven and @sheremet-va in https://github.com/vitest-dev/vitest/issues/2573 <samp>(894f1)</samp>
- Flaky c8 coverage caused by parallel sourcemap constructing &nbsp;-&nbsp; by @AriPerkkio and @sheremet-va in https://github.com/vitest-dev/vitest/issues/2591 <samp>(9a29f)</samp>