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 (da85a)

    View changes on GitHub