@vitest/spy

Bug Fixes

• Keep vite default fs.deny with api token file

• Handle quoted file names in --changed

• Add data to the import.meta.hot stub

• Set skip in skipIf, ignore undefined options

• Skip builtin loading in async leak detector

• Keep the import frame in native loader errors

• Run hook cleanups when a later hook fails

• Release mocks of finished test files

• Abort all running tests on cancel

• browser: Ignore synthetic pagehide events

• browser: Run plugin buildStart on server creation

• browser: Drop late connections of closed sessions

• browser: Wait 30s for the browser to close

• browser: Run global setup once with instances

• reporter: End reason 'failed' on worker crash

Features

• experimental: Tag cache directories with CACHEDIR.TAG

• experimental: Support test.ui.theme option

• experimental: Highlight selector multiple matches in trace view

• experimental: Print how many tests were affected and a total when running --changed

• experimental: Add an option to cache dependencies instead of statically parsing them

• experimental: Add fit and zoom controls to trace viewer

Bug Fixes

• Fail the run on git and location filter errors

• Enable fsModuleCache by default

• Track project files and mocks with --changed

• Refactor caching, fix : in project and change the shape of results cache

• Keep full $ string values when taskTitleValueFormatTruncate is 0

• Resolve node builtins in client environments

• Fix module graph builtin externals after #11421

• Wrap module mocks during in-source testing

• Handle line endings in snapshot

• Respect root in projects

• Resolve mocks in directories with spaces

• api: Publish the api token atomically

• browser: Close the mock route interception race

• browser: Allow toHaveTextContent without arguments

• browser: Apply API options without browser config

• browser: Preserve undefined command arguments

• browser: Wait for setup mocks before importing a test file

• browser: Avoid extra scroll outside the iframe

• browser: Run browser instances as workers

  • ⚠️ This can degrade performance if you have a custom maxWorkers setting. Previously, it was applied incorrectly and could lead to Vitest using too many resources. For example, a lower number would still open too many browsers. Fixing it means Vitest opens less instances by default now.

• browser: Open one cdp session per tester

• browser: Clean up unmocked and pending mocks

• coverage: V8 browser memory leak between test files

• coverage: allowExternal fails to include uncovered files

• coverage: Filenames containing brackets incorrectly showing as uncovered

• coverage: Istanbul coverage wrong when module transform warmups

• deps: Update all non-major dependencies

• expect: Fix Map and Set deep equality in some assertions

• expect: Check value in chai-style returned

• mocker: Fix native loader mocking edge cases

• pretty-format: Support boxed symbols

• reporters: Junit to strip ANSI sequences from all XML attributes

• runner: Don't cache failed fixture setups

• typecheck: Use typescript pool in toTestSpecification

• ui: Remove duplicate browser-open call opening two tabs

• ui: Simplify explorer filtering + fix nested tests when search matches a suite

• ui: Store module graph once per environment

• ui: Mount index.html handler on the ui base path

• ui: Center split pane resize handle

• vm: Bind this to module.exports

Performance

• Reuse fsModuleCache when filtering by source

• spy: Reset only mocks that were called or reconfigured

Bug Fixes

• Isolate result.status between repeats runs

• Don't print an interceptor warning in browser mode

• Don't retry when test.fails expectedly failed

• Scope cache key generators to projects

• browser: Delay server listen until tests start running

• browser: Check mock path boundaries

• browser: Keep config of browser-consumed environments

• browser: Ignore page crash while cancelling

• browser: toMatchScreenshot uses wrong reference on retried tests

• cache: Revalidate imports of cached modules

• deps: Pin why-is-node-running to 3.2.1 to avoid users running into ERR_PNPM_TRUST_DOWNGRADE

• expect: Pass current equality testers to expect.extend asymmetric matchers

• jsdom: Support Blob on jsdom 30.1

• pool: Preserve unique pool ids when groupOrder is set

• ui: Split-pane handle overlapping iframe

• vitest: Remove root temp dir on close

• vm: Do not optimize deps from index.html

• vm: Don't reuse scripts across vite environments