# jest changelog

> jest release notes.

- Vendor: jest
- Category: Developer Tools
- Official site: https://jestjs.io/
- Tracked by: What's New (https://whatsnew.fyi/product/jest)
- Harvested from: GitHub (jestjs/jest)
- Entries below: 10 (newest first)

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

## Releases

### v30.4.2

- Date: 2026-05-09
- Version: v30.4.2
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.4.2
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.4.2

#### Fixes

- `[jest-runtime]` Fix named imports from CJS modules whose `module.exports` is a function with own-property exports ([#16150](https://github.com/jestjs/jest/pull/16150))


**Full Changelog**: https://github.com/jestjs/jest/compare/v30.4.1...v30.4.2

### v30.4.1

- Date: 2026-05-08
- Version: v30.4.1
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.4.1
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.4.1

##### Features

- `[jest-config, jest-core, jest-runner, jest-schemas, jest-types]` Allow custom runner configuration options via tuple format `['runner-path', {options}]` ([#16141](https://github.com/jestjs/jest/pull/16141))

##### Fixes

- `[jest-runtime]` Align CJS-from-ESM default export with Node: `module.exports` is always the ESM default, `__esModule` unwrapping is no longer applied ([#16143](https://github.com/jestjs/jest/pull/16143))


**Full Changelog**: https://github.com/jestjs/jest/compare/v30.4.0...v30.4.1

### v30.4.0

- Date: 2026-05-07
- Version: v30.4.0
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.4.0
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.4.0

Big release! 😀 

Main feature is a rewrite of our custom runtime in preparation for stabilisation of native support of ESM. As part of that work `require(esm)` module is now supported on Node 24.9+ (still requires `--experimental-vm-modules` like before).

In addition we now support fake timers for the recently released `Temporal` API in Node v26.

React 19 is also supported properly in `pretty-format`, meaning snapshots of React components now work like they should.

Due to all the changes, there might be regressions that snuck in. Please report them!

Full list of changes below

##### Features

- `[babel-jest]` Support collecting coverage from `.mts`, `.cts` (and other) files ([#15994](https://github.com/jestjs/jest/pull/15994))
- `[jest-circus, jest-cli, jest-config, jest-core, jest-jasmine2, jest-types]` Add `--collect-tests` flag to discover and list tests without executing them ([#16006](https://github.com/jestjs/jest/pull/16006))
- `[jest-config, jest-runner, jest-worker]` Add `workerGracefulExitTimeout` config option to control how long workers are given to exit before being force-killed ([#15984](https://github.com/jestjs/jest/pull/15984))
- `[jest-config]` Add support for `jest.config.mts` as a valid configuration file ([#16005](https://github.com/jestjs/jest/pull/16005))
- `[jest-config, jest-core, jest-reporters, jest-runner]` `verbose` and `silent` can now be set per-project; the project-level value overrides the global value for that project's tests ([#16133](https://github.com/jestjs/jest/pull/16133))
- `[@jest/fake-timers]` Accept `Temporal.Duration` in `jest.advanceTimersByTime()` and `jest.advanceTimersByTimeAsync()` ([#16128](https://github.com/jestjs/jest/pull/16128))
- `[@jest/fake-timers]` Accept `Temporal.Instant` and `Temporal.ZonedDateTime` in `jest.setSystemTime()` and `useFakeTimers({now})` ([#16128](https://github.com/jestjs/jest/pull/16128))
- `[@jest/fake-timers]` Support faking `Temporal.Now.*` ([#16131](https://github.com/jestjs/jest/pull/16131))
- `[jest-mock]` Add `clearMocksOnScope(scope)` on `ModuleMocker` for clearing every mock function exposed on a scope object ([#16088](https://github.com/jestjs/jest/pull/16088))
- `[jest-resolve]` Add `canResolveSync()` on `Resolver` so callers can detect when a user-configured resolver only exports an `async` hook ([#16064](https://github.com/jestjs/jest/pull/16064))
- `[jest-runtime]` Use synchronous `evaluate()` for ES modules without top-level `await` on Node versions that support it (v24.9+), and prefer the synchronous transform path when a sync transformer is configured ([#16062](https://github.com/jestjs/jest/pull/16062))
- `[jest-runtime]` Support `require()` of ES modules on Node v24.9+ ([#16074](https://github.com/jestjs/jest/pull/16074))
- `[jest-runtime]` Validate TC39 import attributes (`with { type: 'json' }`) on ESM imports ([#16127](https://github.com/jestjs/jest/pull/16127))
- `[@jest/transform]` Add `canTransformSync(filename)` on `ScriptTransformer` so callers can pick the sync vs async transform path ([#16062](https://github.com/jestjs/jest/pull/16062))
- `[jest-util]` Add `isError` helper ([#16076](https://github.com/jestjs/jest/pull/16076))
- `[pretty-format]` Support React 19 ([#16123](https://github.com/jestjs/jest/pull/16123))

##### Fixes

- `[expect-utils]` Fix `toStrictEqual` failing on `structuredClone` results due to cross-realm constructor mismatch ([#15959](https://github.com/jestjs/jest/pull/15959))
- `[@jest/expect-utils]` Prevent `toMatchObject`/subset matching from throwing when encountering exotic iterables ([#15952](https://github.com/jestjs/jest/pull/15952))
- `[fake-timers]` Convert `Date` to milliseconds before passing to `@sinonjs/fake-timers` ([#16029](https://github.com/jestjs/jest/pull/16029))
- `[jest]` Export `GlobalConfig` and `ProjectConfig` TypeScript types ([#16132](https://github.com/jestjs/jest/pull/16132))
- `[jest-circus]` Prevent crash when `asyncError` is unde

_[Truncated at 4000 characters — full notes: https://github.com/jestjs/jest/releases/tag/v30.4.0]_

### v30.3.0

- Date: 2026-03-10
- Version: v30.3.0
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.3.0
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.3.0

###### Features

- `[jest-config]` Add `defineConfig` and `mergeConfig` helpers for type-safe Jest config ([#15844](https://github.com/jestjs/jest/pull/15844))
- `[jest-fake-timers]` Add `setTimerTickMode` to configure how timers advance
- `[*]` Reduce token usage when run through LLMs ([`3f17932`](https://github.com/jestjs/jest/commit/3f17932061c0203999451e5852664093de876709))

###### Fixes

- `[jest-config]` Keep CLI coverage output when using `--json` with `--outputFile` ([#15918](https://github.com/jestjs/jest/pull/15918))
- `[jest-mock]` Use `Symbol` from test environment ([#15858](https://github.com/jestjs/jest/pull/15858))
- `[jest-reporters]` Fix issue where console output not displayed for GHA reporter even with `silent: false` option ([#15864](https://github.com/jestjs/jest/pull/15864))
- `[jest-runtime]` Fix issue where user cannot utilize dynamic import despite specifying `--experimental-vm-modules` Node option ([#15842](https://github.com/jestjs/jest/pull/15842))
- `[jest-test-sequencer]` Fix issue where failed tests due to compilation errors not getting re-executed even with `--onlyFailures` CLI option ([#15851](https://github.com/jestjs/jest/pull/15851))
- `[jest-util]` Make sure `process.features.require_module` is `false` ([#15867](https://github.com/jestjs/jest/pull/15867))

###### Chore & Maintenance

- `[*]` Replace remaining micromatch uses with picomatch
- `[deps]` Update to sinon/fake-timers v15
- `[docs]` Update V30 migration guide to notify users on `jest.mock()` work with case-sensitive path ([#15849](https://github.com/jestjs/jest/pull/15849))
- Updated Twitter icon to match the latest brand guidelines ([#15869](https://github.com/jestjs/jest/pull/15869))

### v30.2.0 — 30.2.0

- Date: 2025-09-28
- Version: v30.2.0
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.2.0
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.2.0

###### Chore & Maintenance

- `[*]` Update example repo for testing React Native projects ([#15832](https://github.com/jestjs/jest/pull/15832))
- `[*]` Update `jest-watch-typeahead` to v3 ([#15830](https://github.com/jestjs/jest/pull/15830))

##### Features

- `[jest-environment-jsdom-abstract]` Add support for JSDOM v27 ([#15834](https://github.com/jestjs/jest/pull/15834))

###### Fixes

- `[babel-jest]` Export the `TransformerConfig` interface ([#15820](https://github.com/jestjs/jest/pull/15820))
- `[jest-config]` Fix `jest.config.ts` with TS loader specified in docblock pragma ([#15839](https://github.com/jestjs/jest/pull/15839))

### v30.1.3 — 30.1.3

- Date: 2025-09-03
- Version: v30.1.3
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.1.3
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.1.3

###### Fixes

- Fix `unstable_mockModule` with `node:` prefixed core modules.

### v30.1.2 — 30.1.2

- Date: 2025-09-03
- Version: v30.1.2
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.1.2
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.1.2

###### Fixes

- `[jest-snapshot-utils]` Correct snapshot header regexp to work with newline across OSes ([#15803](https://github.com/jestjs/jest/pull/15803))

### v30.1.1 — 30.1.1

- Date: 2025-08-27
- Version: v30.1.1
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.1.1
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.1.1

###### Fixes

- `[jest-snapshot-utils]` Fix deprecated goo.gl snapshot warning not handling Windows end-of-line sequences ([#15800](https://github.com/jestjs/jest/pull/15800))

### v30.1.0 — 30.1.0

- Date: 2025-08-27
- Version: v30.1.0
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.1.0
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.1.0

##### Features

- `[jest-leak-detector]` Configurable GC aggressiveness regarding to V8 heap snapshot generation ([#15793](https://github.com/jestjs/jest/pull/15793/)) 
- `[jest-runtime]` Reduce redundant ReferenceError messages
- `[jest-core]` Include test modules that failed to load when --onlyFailures is active

###### Fixes

- `[jest-snapshot-utils] Fix deprecated goo.gl snapshot guide link not getting replaced with fully canonical URL ([#15787](https://github.com/jestjs/jest/pull/15787))
- `[jest-circus]` Fix `it.concurrent` not working with `describe.skip` ([#15765](https://github.com/jestjs/jest/pull/15765))
- `[jest-snapshot]` Fix mangled inline snapshot updates when used with Prettier 3 and CRLF line endings
- `[jest-runtime]` Importing from `@jest/globals` in more than one file no longer breaks relative paths ([#15772](https://github.com/jestjs/jest/issues/15772))

#### Chore

- `[expect]` Update docblock for `toContain()` to display info on substring check ([#15789](https://github.com/jestjs/jest/pull/15789))

### v30.0.2 — 30.0.2

- Date: 2025-06-19
- Version: v30.0.2
- Original notes: https://github.com/jestjs/jest/releases/tag/v30.0.2
- Permalink: https://whatsnew.fyi/product/jest/releases/v30.0.2

##### What's Changed

###### Fixes

- `[jest-matcher-utils]` Make 'deepCyclicCopyObject' safer by setting descriptors to a null-prototype object ([#15689](https://github.com/jestjs/jest/pull/15689))
- `[jest-util]` Make garbage collection protection property writable ([#15689](https://github.com/jestjs/jest/pull/15689))

**Full Changelog**: https://github.com/jestjs/jest/blob/main/CHANGELOG.md