Web Test Runner

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About

Web Test Runner is ranked #6 of 23 in JavaScript testing frameworks on Inferse. It runs on Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

Compared on JavaScript testing frameworks

Free plan: Yesmodern-web.dev
Component testing: Yesmodern-web.dev
Coverage reporting: Yesmodern-web.dev
Snapshot testing: Yesmodern-web.dev
Supported runtimes: Chromium, Firefox, WebKitmodern-web.dev
Parallel execution: Yesmodern-web.dev

Facts

Purpose: Web Test Runner is a test runner for web applications.modern-web.dev · 2 Oct 2026
Browser testing: It can run tests in headless browsers using Puppeteer, Playwright, Selenium, or WebdriverIO.modern-web.dev · 2 Oct 2026
Parallel and isolated tests: Tests run in parallel and in isolation, with each test file in its own browser environment.modern-web.dev · 2 Oct 2026
Debugging: Debug mode opens a real browser window with developer tools, and the runner reports browser logs, 404s, and errors.modern-web.dev · 2 Oct 2026
Watch mode and coverage: The command line supports interactive watch mode and code coverage profiling.modern-web.dev · 2 Oct 2026
Module mocking: The runner can mock ES modules using import maps.modern-web.dev · 2 Oct 2026
Browser integrations: Playwright can run tests on Chromium, Firefox, and WebKit; BrowserStack and Sauce Labs launchers are also documented.modern-web.dev · 2 Oct 2026
Build tooling: The runner is powered by esbuild and Rollup plugins.modern-web.dev · 2 Oct 2026
Test framework: The documentation includes a Mocha test framework integration and instructions for writing a custom test framework.modern-web.dev · 2 Oct 2026
Installation: The project documents installation as an npm development dependency using @web/test-runner.modern-web.dev · 2 Oct 2026
Project status: Modern Web says its code is open source and publicly available on GitHub, with packages published under the @web npm namespace.modern-web.dev · 2 Oct 2026
Support and contributions: The site directs users to GitHub for help and feedback and invites contributions to its documentation.modern-web.dev · 2 Oct 2026
Maker focus: Modern Web says its goal is to provide developers with guides and tools for building for the modern web while working closely with browser capabilities.modern-web.dev · 2 Oct 2026
Purpose: Web Test Runner is a test runner for web applications.modern-web.dev · 3 Oct 2026
Browser diagnostics: It reports browser logs, 404 responses, and errors.modern-web.dev · 3 Oct 2026
Debugging: Debug mode opens a real browser window with developer tools.modern-web.dev · 3 Oct 2026
Execution: Tests run in parallel and isolation, and watch mode reruns tests when files change.modern-web.dev · 3 Oct 2026
Module mocking: The runner can mock ES modules using import maps.modern-web.dev · 3 Oct 2026
Browser launchers: Documented launchers include Puppeteer, Playwright, Selenium, BrowserStack, and WebdriverIO.modern-web.dev · 3 Oct 2026
Browser coverage: The Playwright launcher supports bundled Chromium, Firefox, and WebKit browsers.modern-web.dev · 3 Oct 2026
Remote testing: The BrowserStack launcher runs tests remotely, and the docs say it can be useful for older browser versions.modern-web.dev · 3 Oct 2026
Test framework: The documentation includes Mocha as a test framework and allows users to write their own framework.modern-web.dev · 3 Oct 2026
Code coverage: Coverage supports configurable thresholds and reports, while the default coverage instrumentation uses Chromium.modern-web.dev · 3 Oct 2026
Integrations: The docs describe using the Playwright launcher with GitHub Actions via Microsoft's Playwright Action.modern-web.dev · 3 Oct 2026
Installation: The official installation instructions use npm to add @web/test-runner as a development dependency.modern-web.dev · 3 Oct 2026
License: The project's GitHub page identifies the repository license as MIT.github.com · 3 Oct 2026
Support: The project links to Discord for community discussion and lists sponsorship and contributions as ways to support it.github.com · 3 Oct 2026
Maker: Modern Web describes its goal as providing developers with guides and tools for modern web development while working closely with the browser.modern-web.dev · 3 Oct 2026