# @vue/cli-plugin-unit-jest > unit-jest plugin for vue-cli ## Injected Commands - **`vue-cli-service test:unit`** Run unit tests with Jest. Default `testMatch` is `/(tests/unit/**/*.spec.(js|jsx|ts|tsx)|**/__tests__/*.(js|jsx|ts|tsx))` which matches: - Any files in `tests/unit` that end in `.spec.(js|jsx|ts|tsx)`; - Any js(x)/ts(x) files inside `__tests__` directories. Usage: `vue-cli-service test:unit [options] ` All [Jest command line options](https://facebook.github.io/jest/docs/en/cli.html) are also supported. ## Configuration Jest can be configured via `jest.config.js` in your project root, or the `jest` field in `package.json`. ## Installing in an Already Created Project ``` sh vue add @vue/unit-jest ```