TestMu AI (Formerly LambdaTest) is the world's first full-stack AI Agentic Quality Engineering platform that empowers teams to test intelligently, smarter, and ship faster. Built for scale, it offers a full-stack testing cloud with 10K+ real devices and 3,000+ browsers. With AI-native test management, MCP servers, and agent-based automation, TestMu AI supports Selenium, Appium, Playwright, and all major frameworks.
With TestMu AI (Formerly LambdaTest), you can run automated Selenium and Playwright tests for the sample To-Do app across real browsers and operating systems.
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Sign up on TestMu AI (Formerly LambdaTest).
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Follow the TestMu AI Documentation for the full setup walkthrough.
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A modern web browser (Chrome, Firefox, Safari, etc.).
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A TestMu AI account — sign up here.
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Your TestMu AI Username and Access Key from the Automation Dashboard.
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For automated tests: Node.js (v16 or higher) or Python 3.7+ depending on the test runner used.
Clone the repository:
git clone https://github.com/LambdaTest/sample-todo-app
cd sample-todo-app
Open index.html directly in a browser to view the To-Do app, or serve it with a local HTTP server:
npx serve .
Set your TestMu AI credentials as environment variables:
- For Linux/macOS:
export LT_USERNAME="YOUR_USERNAME"
export LT_ACCESS_KEY="YOUR_ACCESS_KEY"
- For Windows:
set LT_USERNAME="YOUR_USERNAME"
set LT_ACCESS_KEY="YOUR_ACCESS_KEY"
Run Selenium tests against the TestMu AI (Formerly LambdaTest) grid:
cd selenium
npm install
npm test
Run Playwright tests:
cd playwright
npm install
npx playwright test
To test locally hosted apps, set up the TestMu AI tunnel. OS-specific guides:
Configure tunnel in your test capabilities:
const capabilities = {
tunnel: true
};Contributions are welcome. Open an issue to discuss your idea before submitting a pull request. When reporting bugs, include your Node.js version, OS, and browser version.
Connect with testers and developers in the TestMu AI Community. Ask questions, share what you are building, and discuss best practices in test automation and DevOps.
Earn free TestMu AI Certifications for testers, developers, and QA engineers. Validate your skills in Selenium, Cypress, Playwright, Appium, Espresso and more. Industry-recognized, shareable on LinkedIn, and built by practitioners, not marketers.
Learn modern testing through tutorials, guides, videos, and weekly updates:
On January 12, 2026, LambdaTest evolved to TestMu AI, the world's first fully autonomous Agentic AI Quality Engineering Platform.
Same team. Same infrastructure. Same customer accounts. All existing LambdaTest logins, scripts, capabilities, and integrations continue to work without change.
ð Find the new home for LambdaTest.
In 2017, we launched LambdaTest with a simple mission: make testing fast, reliable, and accessible. As LambdaTest grew, we expanded into Test Intelligence, Visual Regression Testing, Accessibility Testing, API Testing, and Performance Testing, covering the full depth of the testing lifecycle.
As software development entered the AI era, testing had to evolve, too. We rebuilt the architecture to be AI-native from the ground up, with autonomous agents that plan, author, execute, analyze, and optimize tests while keeping humans in the loop. The platform integrates with your repos, CI, IDEs, and terminals, continuously learning from every code change and development signal.
That evolution earned a new name: TestMu AI, built for an AI-first future of quality engineering. TestMu is not a new name for us. It is the name of our annual community conference, which has brought together 100,000+ quality engineers to discuss how AI would reshape testing, long before that became an industry norm.
What started as a high-performance cloud testing platform has transformed into an AI-native, multi-agent system powering a connected, end-to-end quality layer. That evolution defined a new identity: LambdaTest evolved into TestMu AI, built for an AI-first future of quality engineering.
Got a question? Email support@testmuai.com or chat with us 24x7 from our chat portal.