vitest/docs/guide/cli.md

Command Line Interface

Commands

vitest watch

Run all test suites but watch for changes and rerun tests when they change. Same as calling vitest without a command. In CI environments this command will fallback to vitest run

vitest run

Perform a single run without watch mode.

vitest dev

Run vitest in development mode.

vitest related

Run only tests that cover a list of source files. Works with static lazy imports, but not the dynamic ones. All files should be relative to root folder.

Useful to run with lint-staged or with your CI setup.

vitest related /src/index.ts /src/hello-world.js

Options

Options
-v, --version	Display version number
-r, --root <path>	Define the project root
-c, --config <path>	Path to config file
-u, --update	Update snapshots
-w, --watch	Smart & instant watch mode
-t, --testNamePattern <pattern>	Run tests with full names matching the pattern
--dir <path>	Base directory to scan for the test files
--ui	Enable UI
--open	Open the UI automatically if enabled (default: true)
--api [api]	Serve API, available options: --api.port <port>, --api.host [host] and --api.strictPort
--threads	Enable Threads (default: true)
--silent	Silent console output from tests
--isolate	Isolate environment for each test file (default: true)
--reporter <name>	Select reporter: default, verbose, dot, junit, json, or a path to a custom reporter
--outputFile <filename/-s>	Write test results to a file when the --reporter=json or --reporter=junit option is also specified Via [cac's dot notation] you can specify individual outputs for multiple reporters
--coverage	Use c8 for coverage
--run	Do not watch
--mode	Override Vite mode (default: test)
--mode <name>	Override Vite mode (default: test)
--globals	Inject APIs globally
--dom	Mock browser api with happy-dom
--environment <env>	Runner environment (default: node)
--passWithNoTests	Pass when no tests found
--allowOnly	Allow tests and suites that are marked as only (default: false in CI, true otherwise)
--changed [since]	Run tests that are affected by the changed files (default: false). See docs
-h, --help	Display available CLI options

changed

• Type: boolean | string
• Default: false

Run tests only against changed files. If no value is provided, it will run tests against uncommitted changes (including staged and unstaged).

To run tests against changes made in the last commit, you can use --changed HEAD~1. You can also pass commit hash or branch name.