--- title: "Web tests that verify the whole flow." description: "Agentic AI software testing for web apps: Momentic agents write, run and repair end-to-end tests from the CLI, MCP server or cloud on each pull request." canonical: "https://momentic.ai/web-app-testing" last-updated: "2026-10-09T17:17:31-07:00" --- # Web tests that verify the whole flow. URL: https://momentic.ai/web-app-testing platform / web-app-testing Describe what users should be able to do. Momentic's AI plans and runs the steps, then checks your assertions as the UI changes. [Try for free](https://app.momentic.ai/signup) [Get a demo](/sales) Works with Chromium · Google Chrome · Chrome for Testing ## End-to-end checks in a running browser. YAML Tests reviewed in Git Chromium Chromium, Google Chrome, and Chrome for Testing Plain English Describe controls and expected outcomes in plain English. Hosted runs Run independent tests in parallel on managed browsers. AI actions Describe a goal instead of scripting each interaction. ## How web automation testing works. Define the flow and the expected result. Run it against your app and inspect failures in the recorded steps. 01 ### Install Momentic The wizard installs the CLI and browser, then runs a sample. Connect your application and keep the project files in Git. 02 ### Describe the flow Give an AI action a goal, or write individual preset steps. Add assertions for the behavior your users depend on. 03 ### Run and verify Momentic navigates the app and checks your assertions. Review screenshots and step results, then run the test in your release pipeline. ## Give the AI a goal. Keep the assertions explicit. Let the agent choose the path through your app. Use preset steps for specific interactions and assertions to verify the result. add-to-cart.test.yaml yaml ```yaml fileType: momentic/test/v2 id: add-to-cart url: https://www.saucedemo.com/ steps: - act: goal: |- Log in with username standard_user and password secret_sauce. postcondition: The product inventory list is shown. - click: The Sauce Labs Backpack product name - click: The Add to cart button - click: The shopping cart icon - assert: The cart contains the Sauce Labs Backpack ``` Example using the public demo credentials. The AI action signs in, preset steps add a product, and the assertion checks the cart. Replace the URL and descriptions to test your own app. ### Find controls from screenshots Describe the label, role, and surrounding page. Momentic uses screenshots and accessibility signals to find the control. It checks saved element matches and finds the control again when the match changes. ### Assert what users see and do AI assertions inspect screenshots for visible state and meaning. Add deterministic checks when an exact value defines the requirement. Verify the expected result after an AI action or preset step. ### Plan actions and reuse successful runs Give an AI action one goal. The agent chooses the interactions and a separate reviewer checks completion. Momentic caches successful actions for replay and attempts a repair if replay misses the goal. ### Run on managed browsers Use hosted browsers for concurrent CI runs while your CLI coordinates execution. Inspect screenshots, logs, and retained video when a test fails, or run locally to debug the same flow. Read the docs - [AI actions and assertions](/docs/guides/ai-actions/guide) - [Plain-English locators](/docs/core-concepts/finding-elements) - [Hosted browsers](/docs/running-tests/hosted-test-environments) ## Web test automation that keeps up with your UI. Replay successful steps and find changed controls again. Review proposed test repairs when the app changes. ### Describe flows in plain English Give an AI action a goal and let it plan the steps. Mix preset interactions and assertions into the same test. Review what users should be able to do. ### Check the screen users see AI assertions inspect screenshots for layout, image content, and visible state. Add deterministic assertions for exact values such as totals and IDs. Verify appearance and behavior together. ### Locators that adapt to UI changes Momentic checks saved element matches against the current page. When a match changes, AI finds the control again from its description and screenshot. Keep the test as your UI changes. ### Hosted browsers for your suite Run tests on managed browsers while your CLI coordinates execution. Use the same tests locally when you want to inspect an interaction. Choose where each browser runs. ### Reuse successful AI actions Momentic caches successful actions and replays their steps on later runs. If replay misses the goal, the agent attempts to repair the flow. Replay the flow and verify the outcome. ### Test backend response variants Define the response for a matching network request. Verify empty states, feature variants, and server errors without changing the live backend. Make the response part of your test. How engineering teams use Momentic. Read how teams add repository tests, verify changes in CI, and investigate failed runs. “Momentic gave us a fast and reliable way to validate Poe.com's AI responses, even when they weren't deterministic.” Momoko F. Head of Product Operations, Quora 30 min daily test execution, down from 7 hours 500+ manual test cases replaced 100% critical tests created in one month [30 min daily test execution, down from 7 hours "Momentic gave us a fast and reliable way to validate Poe.com's AI responses, even when they weren't deterministic." Momoko F. Head of Product Operations, Quora](/customers/quora) [8x increase in release cadence "It's like giving someone your QA checklist and watching them execute it for you!" Sriram S. Engineering Lead, Source Control, Retool](/customers/retool) [80% faster release cycles "With Momentic, we've caught bugs that would have eluded even our most diligent internal tests." Alex C. CTO, GPTZero](/customers/gptzero) [6x faster end-to-end test creation "We've already seen a 30% decrease in production incidents thanks to Momentic's automated testing." Hanna K. Head of QA, CoverGo](/customers/covergo) [85% reduction in production incidents "Momentic gives us reliable end-to-end coverage, so we can focus on features instead of maintaining tests." Alec H. Staff AI Engineer, Mutiny](/customers/mutiny) [Browse all](/customers) ## Test web, iOS, and Android. Use the same simplified YAML format across web and mobile. Choose the CLI and runtime for each test. [01 Android Native Android, React Native, Expo, and Flutter apps on local or remote emulators.](/android-testing)[02 iOS Native Swift and cross-platform iOS builds on local or hosted simulators.](/ios-testing)[03 Agentic AI agents that author, run, repair, and maintain tests as the product changes.](/agentic-testing) ## Web app testing, answered. What is web app testing? Checking browser behavior. Define expected outcomes for sign-in, forms, navigation, and checkout, then verify the UI and its API interactions in a supported browser. What is automated web application testing? Software runs the checks. Repository tests execute the same stated behavior from a developer machine or a configured CI job. How does Momentic automate web app testing? You describe the steps. Momentic finds elements on the current page, performs the interactions, and checks your assertions. It can reuse saved element matches on later runs. Do I need to write XPath or CSS selectors? No. Describe an element by its visible label, role, or surrounding context. Momentic resolves it from the rendered page and accessibility state. How does Momentic reduce flaky web tests? Momentic rechecks saved element matches and waits for page activity to settle. Enable Failure recovery for eligible CI interruptions; expected behavior still needs explicit assertions. Which browsers does Momentic support? Chromium, Google Chrome, and Chrome for Testing. The editor and MCP use local Chromium. CLI runs can use hosted browsers; your plan sets concurrency. See the [browser documentation](/docs/platforms/web/browsers) for configuration. Can Momentic run web tests in CI/CD? Yes. Configure the CLI in your CI job with its API key and browser runtime. The result can gate pull requests, scheduled checks, or deployments. Can Momentic run tests in parallel? Yes. Set worker count with --parallel and split suites across CI jobs with shard flags. Hosted browsers offload browser processes, while worker configuration and your plan limit concurrency. Can Momentic mock APIs and network requests? Yes. Match a request by URL and return a response from your mock. Use it for fixed test data, a feature-flag variant, or a server-error path. Can coding agents create Momentic web tests? Yes. Claude Code, Cursor, and Codex can create, run, and inspect tests through the local Momentic MCP server. How is Momentic different from Playwright, Selenium, or Cypress? Authoring and recovery differ. Momentic finds elements from plain-English descriptions and rechecks saved matches; conventional suites use code and locator APIs. The [Playwright](/comparison/momentic-vs-playwright) and [Selenium](/comparison/momentic-vs-selenium) comparisons cover the tradeoffs. Is Momentic a no-code platform? No. Engineers and coding agents review YAML in the repository and run it through the CLI. The visual editor writes the same format and provides another authoring path. Still have additional questions? ## Verify what you ship. Run your first test, or book a demo using your app. [Try for free](https://app.momentic.ai/signup) [Get a demo](/sales)