# Vitest v0.4.0 — Release & Upgrade Intelligence
- **Product:** Vitest (https://vitest.dev)
- **Version:** v0.4.0
- **Released:** Feb 18, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/vitest/updates/v0.4.0/

## Executive Summary (TL;DR)
Vitest v0.4.0. Source highlight: fix error if toMatchInlineSnapshot is called on resolves/rejects (#773) (6d19bf7)

## New Features
- add VITEST_WORKER_ID env (#774) (b656f8d)
- allow reassigning `define` globals (#769) (15ea3a3)
- coverage threshold (#783) (b068b44)

## Bug Fixes
- fix error if toMatchInlineSnapshot is called on resolves/rejects (#773) (6d19bf7)
- flush coverage after every test file (fix #771) (#776) (7611178)
- put envs from .env files on process.env (#770) (1623b3c)
- set mode before running Vite (#775) (c98355a)