v30.4.2

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Fixes

• [jest-runtime] Fix named imports from CJS modules whose module.exports is a function with own-property exports (#​16150)

v30.4.1

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Features

• [jest-config, jest-core, jest-runner, jest-schemas, jest-types] Allow custom runner configuration options via tuple format ['runner-path', {options}] (#​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)

v30.4.0

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Features

• [babel-jest] Support collecting coverage from .mts, .cts (and other) files (#​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)
• [jest-config, jest-runner, jest-worker] Add workerGracefulExitTimeout config option to control how long workers are given to exit before being force-killed (#​15984)
• [jest-config] Add support for jest.config.mts as a valid configuration file (#​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)
• [@jest/fake-timers] Accept Temporal.Duration in jest.advanceTimersByTime() and jest.advanceTimersByTimeAsync() (#​16128)
• [@jest/fake-timers] Accept Temporal.Instant and Temporal.ZonedDateTime in jest.setSystemTime() and useFakeTimers({now}) (#​16128)
• [@jest/fake-timers] Support faking Temporal.Now.* (#​16131)
• [jest-mock] Add clearMocksOnScope(scope) on ModuleMocker for clearing every mock function exposed on a scope object (#​16088)
• [jest-resolve] Add canResolveSync() on Resolver so callers can detect when a user-configured resolver only exports an async hook (#​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)
• [jest-runtime] Support require() of ES modules on Node v24.9+ (#​16074)
• [jest-runtime] Validate TC39 import attributes (with { type: 'json' }) on ESM imports (#​16127)
• [@jest/transform] Add canTransformSync(filename) on ScriptTransformer so callers can pick the sync vs async transform path (#​16062)
• [jest-util] Add isError helper (#​16076)
• [pretty-format] Support React 19 (#​16123)

Fixes

• [expect-utils] Fix toStrictEqual failing on structuredClone results due to cross-realm constructor mismatch (#​15959)
• [@jest/expect-utils] Prevent toMatchObject/subset matching from throwing when encountering exotic iterables (#​15952)
• [fake-timers] Convert Date to milliseconds before passing to @sinonjs/fake-timers (#​16029)
• [jest] Export GlobalConfig and ProjectConfig TypeScript types (#​16132)
• [jest-circus] Prevent crash when asyncError is undefined for non-Error throws (#​16003)
• [jest-circus, jest-jasmine2] Include Error.cause in JSON failureMessages output (#​15967)
• [jest-config] Fix preset path resolution on Windows when the preset uses subpath exports (#​15961)
• [jest-config] Allow collectCoverage and coverageProvider in project config without a validation warning (#​16132)
• [jest-config] Project config validator now emits "is not supported in an individual project configuration" instead of "probably a typing mistake" for known global-only options (#​16132)
• [jest-environment-node] Fix --localstorage-file warning on Node 25+ (#​16086)
• [jest-reporters] Apply global coverage threshold to unmatched pattern files in addition to glob/path thresholds (#​16137)
• [jest-reporters, jest-runner, jest-runtime, jest-transform] Fix coverage report not showing correct code coverage when using projects config option (#​16140)
• [jest-runtime] Resolve expect and @jest/expect from the internal module registry so test-file imports share the same JestAssertionError as the global expect (#​16130)
• [jest-runtime] Improve CJS-from-ESM interop: __esModule/Babel default unwrap, broader named-export coverage, and shared CJS singleton across importers (#​16050)
• [jest-runtime] Load .js files with ESM syntax but no "type":"module" marker as native ESM (#​16050)
• [jest-runtime] Extend the .js-with-ESM-syntax fallback to require() on Node v24.9+ - falls back to require(esm) when the CJS parser rejects ESM syntax (#​16078)
• [jest-runtime] Fix deadlocks and double-evaluation in concurrent ESM and wasm imports (#​16050)
• [jest-runtime] Fix error when require() is called after the Jest environment has been torn down (#​15951)
• [jest-runtime] Fix missing error when import() is called after the Jest environment has been torn down (#​16080)
• [jest-runtime] Fix virtual unstable_mockModule registrations not respected in ESM (#​16081)
• [jest-runtime] Apply moduleNameMapper when resolving modules with require.resolve() and the paths option (#​16135)

Chore & Maintenance

• [@jest/fake-timers] Upgrade @sinonjs/fake-timers (#​16139)
• [jest-runtime] Use synchronous linkRequests / instantiate for ESM linking on Node v24.9+ (#​16063)

v30.3.0

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Features

• [jest-config] Add defineConfig and mergeConfig helpers for type-safe Jest config (#​15844)
• [jest-fake-timers] Add setTimerTickMode to configure how timers advance
• [*] Reduce token usage when run through LLMs (3f17932)

Fixes

• [jest-config] Keep CLI coverage output when using --json with --outputFile (#​15918)
• [jest-mock] Use Symbol from test environment (#​15858)
• [jest-reporters] Fix issue where console output not displayed for GHA reporter even with silent: false option (#​15864)
• [jest-runtime] Fix issue where user cannot utilize dynamic import despite specifying --experimental-vm-modules Node option (#​15842)
• [jest-test-sequencer] Fix issue where failed tests due to compilation errors not getting re-executed even with --onlyFailures CLI option (#​15851)
• [jest-util] Make sure process.features.require_module is false (#​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)
• Updated Twitter icon to match the latest brand guidelines (#​15869)

v30.2.0

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Chore & Maintenance

• [*] Update example repo for testing React Native projects (#​15832)
• [*] Update jest-watch-typeahead to v3 (#​15830)

v30.1.3

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Fixes

• Fix unstable_mockModule with node: prefixed core modules.

v30.1.2

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Fixes

• [jest-snapshot-utils] Correct snapshot header regexp to work with newline across OSes (#​15803)

v30.1.1

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Fixes

• [jest-snapshot-utils] Fix deprecated goo.gl snapshot warning not handling Windows end-of-line sequences (#​15800)
• [jest-snapshot-utils] Improve messaging about goo.gl snapshot link change (#​15821)

v30.1.0

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