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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 vitest-dev/vitest#9332 (e3e65)
• Added chai style assertions  -  by @​ronnakamoto and @​sheremet-va in vitest-dev/vitest#8842 (841df)
• Update to sinon/fake-timers v15 and add setTickMode to timer controls  -  by @​atscott and @​sheremet-va in vitest-dev/vitest#8726 (4b480)
• Expose matcher types  -  by @​sheremet-va in vitest-dev/vitest#9448 (3e4b9)
• Add toTestSpecification to reported tasks  -  by @​sheremet-va in vitest-dev/vitest#9464 (1a470)
• Show a warning if vi.mock or vi.hoisted are declared outside of top level of the module  -  by @​sheremet-va in vitest-dev/vitest#9387 (5db54)
• Track and display expectedly failed tests (.fails) in UI and CLI  -  by @​Copilot, sheremet-va and @​sheremet-va in vitest-dev/vitest#9476 (77d75)
• Support tags  -  by @​sheremet-va in vitest-dev/vitest#9478 (de7c8)
• Implement aroundEach and aroundAll hooks  -  by @​sheremet-va in vitest-dev/vitest#9450 (2a8cb)
• Stabilize experimental features  -  by @​sheremet-va in vitest-dev/vitest#9529 (b5fd2)
• Accept new or all in --update flag  -  by @​sheremet-va in vitest-dev/vitest#9543 (a5acf)
• Support meta in test options  -  by @​sheremet-va in vitest-dev/vitest#9535 (7d622)
• Support type inference with a new test.extend syntax  -  by @​sheremet-va in vitest-dev/vitest#9550 (e5385)
• Support vite 8 beta, fix type issues in the config with different vite versions  -  by @​sheremet-va in vitest-dev/vitest#9587 (99028)
• Add assertion helper to hide internal stack traces  -  by @​hi-ogawa and Claude Opus 4.6 in vitest-dev/vitest#9594 (eeb0a)
• Store failure screenshots using artifacts API  -  by @​macarie in vitest-dev/vitest#9588 (24603)
• Allow vitest list to statically collect tests instead of running files to collect them  -  by @​sheremet-va in vitest-dev/vitest#9630 (7a8e7)
• Add --detect-async-leaks  -  by @​AriPerkkio in vitest-dev/vitest#9528 (c594d)
• Implement mockThrow and mockThrowOnce  -  by @​thor-juhasz and @​sheremet-va in vitest-dev/vitest#9512 (61917)
• Support update: "none" and add docs about snapshots behavior on CI  -  by @​hi-ogawa in vitest-dev/vitest#9700 (05f18)
• Support playwright launchOptions with connectOptions  -  by @​hi-ogawa in vitest-dev/vitest#9702 (f0ff1)
• Add page/locator.mark API to enhance playwright trace  -  by @​hi-ogawa in vitest-dev/vitest#9652 (d0ee5)
• api:
  • Support tests starting or ending with test in experimental_parseSpecification  -  by @​jgillick and Jeremy Gillick in vitest-dev/vitest#9235 (2f367)
  • Add filters to createSpecification  -  by @​sheremet-va in vitest-dev/vitest#9336 (c8e6c)
  • Expose runTestFiles as alternative to runTestSpecifications  -  by @​sheremet-va in vitest-dev/vitest#9443 (43d76)
  • Add allowWrite and allowExec options to api  -  by @​sheremet-va in vitest-dev/vitest#9350 (20e00)
  • Allow passing down test cases to toTestSpecification  -  by @​sheremet-va in vitest-dev/vitest#9627 (6f17d)
• browser:
  • Add userEvent.wheel API  -  by @​macarie in vitest-dev/vitest#9188 (66080)
  • Add filterNode option to prettyDOM for filtering browser assertion error output  -  by @​Copilot, sheremet-va and @​sheremet-va in vitest-dev/vitest#9475 (d3220)
  • Support playwright persistent context  -  by @​hi-ogawa, Claude Opus 4.6 and @​sheremet-va in vitest-dev/vitest#9229 (f865d)
  • Added detailsPanelPosition option and button  -  by @​shairez in vitest-dev/vitest#9525 (c8a31)
  • Use BlazeDiff instead of pixelmatch  -  by @​macarie in vitest-dev/vitest#9514 (30936)
  • Add findElement and enable strict mode in webdriverio and preview  -  by @​sheremet-va in vitest-dev/vitest#9677 (c3f37)
• cli:
  • Add @​bomb.sh/tab completions  -  by @​AmirSa12 and @​sheremet-va in vitest-dev/vitest#8639 (200f3)
• coverage:
  • Support ignore start/stop ignore hints  -  by @​AriPerkkio in vitest-dev/vitest#9204 (e59c9)
  • Add coverage.changed option to report only changed files  -  by @​kykim00 and @​AriPerkkio in vitest-dev/vitest#9521 (1d939)
• experimental:
  • Add onModuleRunner hook to worker.init  -  by @​sheremet-va in vitest-dev/vitest#9286 (e977f)
  • Option to disable the module runner  -  by @​sheremet-va and @​AriPerkkio in vitest-dev/vitest#9210 (9be61)

... (truncated)

• 4150b91 chore: release v4.1.0
• 1de0aa2 fix: correctly identify concurrent test during static analysis (#9846)
• c3cac1c fix: use isAgent check, not just TTY, for watch mode (#9841)
• eab68ba chore(deps): update all non-major dependencies (#9824)
• 031f02a fix: allow catch/finally for async assertion (#9827)
• 3e9e096 feat(reporters): add agent reporter to reduce ai agent token usage (#9779)
• 0c2c013 chore: release v4.1.0-beta.6
• 8181e06 fix: hideSkippedTests should not hide test.todo (fix #9562) (#9781)
• a8216b0 fix: manual and redirect mock shouldn't load or transform original module...
• 689a22a fix(browser): types of getCDPSession and cdp() (#9716)
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