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🚀 Experimental Features

coverage:
- Default to text reporter skipFull if agent detected - by @hi-ogawa in #10018 (53757)
experimental:
- Expose assertion as a public field - by @sheremet-va in #10095 (a120e)
- Support aria snapshot - by @hi-ogawa, Claude Opus 4.6 (1M context), @AriPerkkio, Codex and @sheremet-va in #9668 (d4fbb)
reporter:
- Add filterMeta option to json reporter - by @nami8824 and @sheremet-va in #10078 (b77de)

🐞 Bug Fixes

Use "black" foreground for labeled terminal message to ensure contrast - by @hi-ogawa in #10076 (203f0)
Make expect(..., message) consistent as error message prefix - by @hi-ogawa and Codex in #10068 (a1b5f)
Do not hoist imports whose names match class properties . - by @SunsetFi in #10093 and #10094 (0fc4b)
browser: Spread user server options into browser Vite server in project - by @GoldStrikeArch in #10049 (65c9d)

View changes on GitHub

`v4.1.3`

🚀 Experimental Features

Add experimental.preParse flag - by @sheremet-va in #10070 (78273)
Support browser.locators.exact option - by @sheremet-va in #10013 (48799)
Add TestAttachment.bodyEncoding - by @hi-ogawa in #9969 (89ca0)
Support custom snapshot matcher - by @hi-ogawa, Claude Sonnet 4.6 and Codex in #9973 (59b0e)

🐞 Bug Fixes

Advance fake timers with expect.poll interval - by @hi-ogawa and Claude Sonnet 4.6 in #10022 (3f5bf)
Add @vitest/coverage-v8 and @vitest/coverage-istanbul as optional dependency - by @alan-agius4 in #10025 (146d4)
Fix defineHelper for webkit async stack trace + update playwright 1.59.0 - by @hi-ogawa in #10036 (5a5fa)
Fix suite hook throwing errors for unused auto test-scoped fixture - by @hi-ogawa and Claude Sonnet 4.6 in #10035 (39865)
expect:
- Remove JestExtendError.context from verbose error reporting - by @hi-ogawa in #9983 (66751)
- Don't leak "runner" types - by @sheremet-va in #10004 (ec204)
snapshot:
- Fix flagging obsolete snapshots for snapshot properties mismatch - by @hi-ogawa and Claude Sonnet 4.6 in #9986 (6b869)
- Export custom snapshot matcher helper from vitest - by @hi-ogawa and Codex in #10042 (691d3)
ui:
- Don't leak vite types - by @sheremet-va in #10005 (fdff1)
vm:
- Fix external module resolve error with deps optimizer query - by @hi-ogawa and Claude Sonnet 4.6 in #10024 (9dbf4)

View changes on GitHub

`v4.1.2`

This release bumps Vitest's flatted version and removes version pinning to resolve flatted's CVE related issues (#9975).

🐞 Bug Fixes

Don't resolve setupFiles from parent directory - by @hi-ogawa in #9960 (7aa93)
Ensure sequential mock/unmock resolution - by @hi-ogawa and Claude Opus 4.6 in #9830 (7c065)
browser: Take failure screenshot if toMatchScreenshot can't capture a stable screenshot - by @macarie in #9847 (faace)
coverage: Correct coverageConfigDefaults values and types - by @Arthie in #9940 (b3c99)
pretty-format: Fix output limit over counting - by @hi-ogawa in #9965 (d3b7a)
Disable colors if agent is detected - by @sheremet-va and @AriPerkkio in #9851 (6f97b)

View changes on GitHub

`v4.1.1`

🚀 Features

experimental:
- Expose matchesTags to test if the current filter matches tags - by @sheremet-va in #9913 (eec53)
- Introduce experimental.vcsProvider - by @sheremet-va in #9928 (56115)

🐞 Bug Fixes

Mark TestProject.testFilesList internal properly - by @sapphi-red in #9867 (54f26)
Detect fixture that returns without calling use - by @oilater in #9831 and #9861 (633ae)
Drop vite 8.beta support - by @AriPerkkio in #9862 (b78f5)
Type regression in vi.mocked() static class methods - by @purepear and @hi-ogawa in #9857 (90926)
Properly re-evaluate actual modules of mocked external - by @hi-ogawa in #9898 (ae5ec)
Preserve coverage report when html reporter overlaps - by @hi-ogawa in #9889 (2d81a)
Provide vi.advanceTimers to the preview provider - by @sheremet-va in #9891 (1bc3e)
Don't leak event listener in playwright provider - by @sheremet-va in #9910 (d9355)
Open browser in --standalone mode without running tests - by @sheremet-va in #9911 (e78ad)
Guard disposable and optional body - by @sheremet-va in #9912 (6fdb2)
Resolve retry.condition RegExp serialization issue - by @nstepien and @hi-ogawa in #9942 (7b605)
collect:
- Don't treat extra props on test return as tests - by @sheremet-va in #9871 (141e7)
coverage:
- Simplify provider types - by @AriPerkkio in #9931 (aaf9f)
- Load built-in provider without module runner - by @AriPerkkio in #9939 (bf892)
expect:
- Soft assertions continue after .resolves/.rejects promise errors - by @mixelburg, Maks Pikov, Claude Opus 4.6 (1M context) and @hi-ogawa in #9843 (6d74b)
- Fix sinon-chai style API - by @hi-ogawa in #9943 (0f08d)
pretty-format:
- Limit output for large object - by @hi-ogawa and Claude Opus 4.6 (1M context) in #9949 (0d5f9)

View changes on GitHub

`v4.1.0`

Vitest 4.1 is out!

This release page lists all changes made to the project during the 4.1 beta. To get a review of all the new features, read our blog post.

🚀 Features

Return a disposable from doMock() - by @kirkwaiblinger in #9332 (e3e65)
Added chai style assertions - by @ronnakamoto and @sheremet-va in #8842 (841df)
Update to sinon/fake-timers v15 and add setTickMode to timer controls - by @atscott and @sheremet-va in #8726 (4b480)
Expose matcher types - by @sheremet-va in #9448 (3e4b9)
Add toTestSpecification to reported tasks - by @sheremet-va in #9464 (1a470)
Show a warning if vi.mock or vi.hoisted are declared outside of top level of the module - by @sheremet-va in #9387 (5db54)
Track and display expectedly failed tests (.fails) in UI and CLI - by @Copilot, sheremet-va and @sheremet-va in #9476 (77d75)
Support tags - by @sheremet-va in #9478 (de7c8)
Implement aroundEach and aroundAll hooks - by @sheremet-va in #9450 (2a8cb)
Stabilize experimental features - by @sheremet-va in #9529 (b5fd2)
Accept new or all in --update flag - by @sheremet-va in #9543 (a5acf)
Support meta in test options - by @sheremet-va in #9535 (7d622)
Support type inference with a new test.extend syntax - by @sheremet-va in #9550 (e5385)
Support vite 8 beta, fix type issues in the config with different vite versions - by @sheremet-va in #9587 (99028)
Add assertion helper to hide internal stack traces - by @hi-ogawa and Claude Opus 4.6 in #9594 (eeb0a)
Store failure screenshots using artifacts API - by @macarie in #9588 (24603)
Allow vitest list to statically collect tests instead of running files to collect them - by @sheremet-va in #9630 (7a8e7)
Add --detect-async-leaks - by @AriPerkkio in #9528 (c594d)
Implement mockThrow and mockThrowOnce - by @thor-juhasz and @sheremet-va in #9512 (61917)
Support update: "none" and add docs about snapshots behavior on CI - by @hi-ogawa in #9700 (05f18)
Support playwright launchOptions with connectOptions - by @hi-ogawa in #9702 (f0ff1)
Add page/locator.mark API to enhance playwright trace - by @hi-ogawa in #9652 (d0ee5)
api:
- Support tests starting or ending with test in experimental_parseSpecification - by @jgillick and Jeremy Gillick in #9235 (2f367)
- Add filters to createSpecification - by @sheremet-va in #9336 (c8e6c)
- Expose runTestFiles as alternative to runTestSpecifications - by @sheremet-va in #9443 (43d76)
- Add allowWrite and allowExec options to api - by @sheremet-va in #9350 (20e00)
- Allow passing down test cases to toTestSpecification - by @sheremet-va in #9627 (6f17d)
browser:
- Add userEvent.wheel API - by @macarie in #9188 (66080)
- Add filterNode option to prettyDOM for filtering browser assertion error output - by @Copilot, sheremet-va and @sheremet-va in #9475 (d3220)
- Support playwright persistent context - by @hi-ogawa, Claude Opus 4.6 and @sheremet-va in #9229 (f865d)
- Added detailsPanelPosition option and button - by @shairez in #9525 (c8a31)
- Use BlazeDiff instead of pixelmatch - by @macarie in #9514 (30936)
- Add findElement and enable strict mode in webdriverio and preview - by @sheremet-va in #9677 (c3f37)
cli:
- Add @bomb.sh/tab completions - by @AmirSa12 and @sheremet-va in #8639 (200f3)
coverage:
- Support ignore start/stop ignore hints - by @AriPerkkio in #9204 (e59c9)
- Add coverage.changed option to report only changed files - by @kykim00 and @AriPerkkio in #9521 (1d939)
experimental:
- Add onModuleRunner hook to worker.init - by @sheremet-va in #9286 (e977f)
- Option to disable the module runner - by @sheremet-va and @AriPerkkio in #9210 (9be61)
- Add importDurations: { limit, print } options - by @hi-ogawa, Claude Opus 4.6 and @sheremet-va in #9401 (7e10f)
- Add print and fail thresholds for importDurations - by @hi-ogawa and Claude Opus 4.6 in #9533 (3f7a5)
fixtures:
- Pass down file context to beforeAll/afterAll - by @sheremet-va in #9572 (c8339)
reporters:
- Add agent reporter to reduce ai agent token usage - by @cpojer in #9779 (3e9e0)
runner:
- Enhance retry options - by @MazenSamehR, Matan Shavit, @AriPerkkio and @sheremet-va in #9370 (9e4cf)
ui:
- Allow run individual test/suites - by @userquin in #9465 (73b10)
- Add project filter/sort support - by @userquin in #8689 (0c7ea)
- Add duration sorting to explorer - by @julianhahn and @cursoragent in #9603 (209b1)
- Implement filter for slow tests - by @DerYeger and @userquin in #9705 (8880c)
vitest:
- Add run summary in GitHub Actions Reporter - by @macarie and jhnance in #9579 (96bfc)

🐞 Bug Fixes

Deprecate several vitest/* entry points - by @sheremet-va in #9347 (fd459)
Use meta.url in createRequire - by @sheremet-va in #9441 (e3422)
Preact browser mode init example of render function not async - by @WuMingDao in #9375 (2bea5)
Deprecate unused types in matcher context - by @sheremet-va in #9449 (20f87)
Handle external/noExternal during configEnvironment hook - by @hi-ogawa and Claude Opus 4.6 in #9508 (59ea2)
Replace default ssr environment runner with Vitest server module runner - by @hi-ogawa and Claude Opus 4.6 in #9506 (cd5db)
Propagate experimental CLI options to child projects - by @hi-ogawa and Claude Opus 4.6 in #9531 (b624f)
Show a warning when browser.isolate is used - by @sheremet-va in #9410 (3d48e)
Fix vi.mock({ spy: true }) node v8 coverage - by @hi-ogawa, hi-ogawa and Claude Opus 4.6 in #9541 (687b6)
Don't show internal ssr handler in errors - by @sheremet-va in #9547 (76c43)
Close vitest if it failed to start - by @sheremet-va in #9573 (728ba)
Fix ssr environment runner in project - by @hi-ogawa in #9584 (09006)
Trim trailing white spaces in code block - by @hi-ogawa in #9591 (f78be)
Support inline snapshot inside test.for/each - by @hi-ogawa in #9590 (615fd)
Apply source maps for external module stack trace - by @hi-ogawa in #9152 (79e20)
Remove the .name from statically collected test - by @sheremet-va in #9596 (b66ff)
Don't suppress warnings on pnp - by @sheremet-va in #9602 (89cbd)
Support snapshot with expect.soft - by @iumehara, @hi-ogawa and Claude Opus 4.6 in #9231 (3eb2c)
Log seed when only sequence.shuffle.tests is enabled - by @kaigritun, Kai Gritun and @sheremet-va in #9576 (8182b)
Externalize expect/src/utils from vitest - by @hi-ogawa in #9616 (48739)
Ignore test.override during static collection - by @sheremet-va in #9620 (09174)
Increase stacktrace limit for --detect-async-leaks - by @AriPerkkio in #9638 (9fd4c)
Hanging-reporter link in cli - by @flx-sta in #9649 (7c103)
Fix teardown timeout of aroundEach/All when inner aroundEach/All throws - by @hi-ogawa in #9657 (4ec6c)
Fix ui mode / html reporter and coverage integration - by @hi-ogawa and Claude Opus 4.6 in #9626 (86fad)
Don't continue when aroundEach/All setup timed out - by @hi-ogawa in #9670 (bb013)
Align VitestRunnerConfig optional fields with SerializedConfig - by @hi-ogawa in #9661 (79520)
Handle Symbol values in format utility - by @nami8824 in #9658 (0583f)
Deprecate toBe* spy assertions in favor of toHaveBeen* (and toThrowError) - by @sheremet-va in #9665 (4d390)
Don't propagate nested aroundEach/All errors but aggregate them on runner - by @hi-ogawa in #9673 (b6365)
Show a better error if there is a pending dynamic import - by @sheremet-va in #9676 (7ef5c)
Preserve stack trace of resolves/rejects chained assertion error - by @hi-ogawa in #9679 (c6151)
Handle module-sync condition in vmThreads/vmForks require - by @lesleh in #9650 and #9651 (bb203)
Hooks should respect maxConcurrency - by @hi-ogawa in #9653 (16d13)
Recursively autospy module object - by @hi-ogawa in #9687 (695a8)
Remove trailing spaces from diff error log - by @hi-ogawa and @sheremet-va in #9680 (395d1)
Respect project resolve.conditions for externals - by @hi-ogawa in #9717 (1d498)
Use object for WeakMap instead of a symbol to support webcontainers - by @sheremet-va in #9731 (c5225)
Fix re-mocking virtual module - by @hi-ogawa in #9748 (3cbbb)
Cancelling should stop current test immediately - by @AriPerkkio in #9729 (0cb2f)
Make mockObject change backwards compatible - by @sheremet-va in #9744 (84c69)
Fix URL.name on jsdom - by @hi-ogawa in #9767 (031f3)
Save and restore module graph in blob reporter - by @hi-ogawa in #9740 (84355)
Don't silence reporter errors from test runtime events handler in normal run and --merge-reports - by @hi-ogawa in #9727 (4072d)
Fix vi.importActual() for virtual modules - by @hi-ogawa and Claude Opus 4.6 in #9772 (1e89e)
Throw FixtureAccessError if suite hook accesses undefined fixture - by @sheremet-va in #9786 (fc2ce)
Allow hyphens in project config file name pattern - by @Koutaro-Hanabusa and @hi-ogawa in #9760 (33e96)
Manual and redirect mock shouldn't load or transform original module - by @hi-ogawa and Claude Opus 4.6 in #9774 (a8216)
hideSkippedTests should not hide test.todo - by @oilater in #9562 and #9781 (8181e)
Allow catch/finally for async assertion - by @hi-ogawa in #9827 (031f0)
Resolve fixture overrides from test's suite in beforeEach hooks - by @hi-ogawa and Claude Opus 4.6 in #9826 (99e52)
Use isAgent check, not just TTY, for watch mode - by @sheremet-va in #9841 (c3cac)
Use performance.now to measure test timeout duration - by @hi-ogawa and Claude Opus 4.6 in #9795 (f48a6)
Correctly identify concurrent test during static analysis - by @sheremet-va in #9846 (1de0a)
browser:
- Avoid updating screenshots when toMatchScreenshot passes - by @macarie in #9289 (46aab)
- Hide injected data-testid attributes - by @sheremet-va in #9503 (c8d2c)
- Throw an error if iframe was reloaded - by @sheremet-va in #9516 (73a81)
- Encode projectName in browser client URL - by @dkkim0122 in #9523 (5b164)
- Don't take failure screenshot if tests have artifacts created by toMatchScreenshot - by @macarie in #9552 (83ca0)
- Remove --remote-debugging-address from chrome args - by @hi-ogawa and @AriPerkkio in #9712 (f09bb)
- Make sure userEvent actions support ensureAwaited - by @sheremet-va in #9732 (97685)
- Types of getCDPSession and cdp() - by @AriPerkkio in #9716 (689a2)
- Skip esbuild.legalComments when using rolldown-vite - by @Copilot, hi-ogawa and @hi-ogawa in #9803 (3505f)
chai:
- Don't allow deepEqual in the config because it's not serializable - by @sheremet-va in #9666 (9ee99)
coverage:
- Infer transform mode for uncovered files - by @AriPerkkio in #9435 (f3967)
- thresholds.autoUpdate to preserve ending whitespace - by @AriPerkkio in #9436 (7e534)
deps:
- Update all non-major dependencies - by @hi-ogawa in #9192 (90c30)
- Update all non-major dependencies - in #9485 (c0118)
- Update all non-major dependencies - in #9567 (13c9e)
docs:
- Fix old /config/#option hash links causing hydration errors - by @hi-ogawa, Claude Opus 4.6 and @sheremet-va in #9610 (a603c)
expect:
- toMatchObject(Map/Set) should expect Map/Set on left hand side - by @hi-ogawa and Claude Opus 4.6 in #9532 (381da)
- Fix objectContaining with proxy - by @hi-ogawa and Claude Opus 4.6 in #9554 (7ce34)
- Support arbitrary value equality for toThrow and make Error detection robust - by @hi-ogawa and Claude Opus 4.6 in #9570 (de215)
mock:
- Inject helpers after hashbang if present - by @sheremet-va in #9545 (65432)
mocker:
- Update vite's peer dependency range - by @sheremet-va in #9808 (36f9a)
reporter:
- dot reporter leaves pending tests - by @AriPerkkio in #9684 (4d793)
runner:
- Mark repeated tests as finished on last run - by @AriPerkkio in #9707 (cc735)
spy:
- Support deep partial in vi.mocked - by @j2h30728 in #8152 and #9493 (71cb5)
- Fallback to object accessor if descriptor's value is undefined - by @sheremet-va in #9511 (6f181)
- Throw correct errors when shorthand methods are used on a class - by @sheremet-va in #9513 (5d0fd)
types:
- bench.reporters no longer gives type errors when passing file name string paths - by @Bertie690 in #9695 (093c8)
ui:
- Process artifact attachments when generating HTML reporter - by @macarie in #9472 (96eb9)
- Don't fail if --ui and --root are specified together - by @sheremet-va in #9536 (d9305)

🏎 Performance

pretty-format: Combine DOMElement plugins - by @sheremet-va in [#9581](

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sonarqubecloud · 2026-04-01T00:38:57Z

Quality Gate passed for 'Note'

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2026-04-01T00:39:01Z

Quality Gate passed for 'Authorization'

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2026-04-01T00:39:02Z

Quality Gate passed for 'Document'

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2026-04-01T00:39:06Z

Quality Gate passed for 'Search Worker'

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

sonarqubecloud · 2026-04-01T00:39:07Z

Quality Gate passed for 'Web'

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code