●Change8

Migrating to Vitest v4.0.14

Version v4.0.14 introduces 1 breaking change. This guide details how to update your code.

Released: 11/25/2025

1
Breaking Changes
3
Migration Steps
16
Affected Symbols

⚠️ Check Your Code

If you use any of these symbols, you need to read this guide:

utils.configurePrettyDOMrunner task full namestoMatchScreenshot UI tabbed viewcollectimportprepareVITEST_POOL_IDVITEST_WORKER_IDpostMessage (worker ports)debugobugonCancelviewport scalingcircular modules (coverage)expect schema functionjsdom abort signals

Breaking Changes

●Issue #1

Renamed `collect` to `import` and removed `prepare`. Update any configuration or code that referenced `collect` or `prepare` to use the new `import` option.

Migration Steps

  1. 1
    Replace any usage of the old `collect` option with `import`.
  2. 2
    Remove references to the now‑removed `prepare` option.
  3. 3
    If you relied on the previous `debug` logger, update imports to use the new `obug` logger.

Release Summary

Vitest v4.0.14 introduces experimental browser, runner, and UI features, adds several bug fixes, and renames `collect` to `import` (removing `prepare`), requiring a small migration for affected configurations.

Need More Details?

View the full release notes and all changes for Vitest v4.0.14.

View Full Changelog