A Playwright agent’s failed test can point to a brittle locator, an unexpected page state, a real application bug, or a timeout in a different part of the test than you think. Start with the first error and its call log, then inspect the failing state before changing waits, timeouts, or agent-generated code. A rerun that passes is a clue—not proof that the test or feature is fixed.
What kind of failure are you seeing?
Read the first error and the call log before editing the test. Identify the operation that failed: locator resolution or actionability, an assertion, navigation, the overall test, fixture or setup work, browser launch, or an application-level assertion. These failure types have different causes and timeout settings; raising every limit can hide the useful signal.
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Playwright’s documented defaults are 30,000 ms for a test and 5,000 ms for an assertion, according to its current timeout documentation accessed in 2026. They are separate limits and can be changed in project configuration. Fixture work, hooks, and teardown can also consume test time, while slow fixture setup may have its own timeout. Check which operation expired before tuning one: Playwright timeout documentation and fixture documentation.
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Reproduce the problem by running the failing test on its own, then inspect the step history, error, logs, network activity, and DOM snapshot. Playwright’s UI Mode and Inspector provide different ways to explore a run: UI Mode is useful for stepping through tests and reviewing related artifacts; Inspector is useful for stepping through API calls and trying locators.
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For an intermittent failure, capture a trace and examine the screenshot and page state at the suspect step. The Playwright test-debugging walkthrough also shows how to attach to a paused run, inspect console errors and requests, and take a screenshot. Use those artifacts to establish whether the expected page state appeared, whether the request succeeded, and what element the test actually encountered.
Why does a locator time out?
A locator timeout does not by itself establish that the application is broken. The selector may be stale or ambiguous, the target may not be actionable, or the page may never have reached the state the test expects. Playwright’s locator actions wait for readiness checks, but they cannot make an incorrect selector or broken behavior correct.
For a click, Playwright checks that the locator identifies a unique element and that the element is visible, stable, able to receive events, and enabled. If those checks do not pass before the relevant timeout, the action fails. See the actionability guide.
Choose a locator that expresses intent
Prefer a locator based on a user-visible role and name, or a deliberate test ID when that is a better fit for the application. CSS and XPath can be appropriate when needed, but long selector chains and selectors tied to incidental DOM structure are more likely to break when the page changes. Confirm that the locator resolves to exactly the intended element; the locator guide explains the available strategies.
What should replace a fixed wait?
Synchronize on the condition the test needs: use locator actions that wait for readiness and web-first assertions that retry until their condition is met or times out. Avoid adding a hard-coded waitForTimeout() just to give the page more time. Playwright’s Page API documentation states, “Tests that wait for time are inherently flaky,” and says timer waits should be used only for debugging: Page API reference.
If the expected state never arrives, inspect the UI, network activity, application response, and assertion. A longer sleep cannot correct a request that failed, a wrong condition, or a broken feature. The assertions documentation describes retrying web-first assertions.
What does a retry that passes mean?
Retries are disabled by default in Playwright. When retries are enabled, a test that fails on its first run and passes on a retry is classified as flaky—not as a clean first-run pass. Retries can reveal intermittency, but they do not explain or repair it. Keep the classification visible in the report and compare the failed and passing attempts’ traces, setup, browser state, and data. Playwright notes that the worker and browser process may be replaced after a test failure, so differences in shared state or setup assumptions are worth checking. See Playwright’s retry documentation.
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Playwright’s official Test Agents have distinct planner, generator, and healer roles. The healer can replay a failure, inspect the UI, suggest a patch, and rerun the test; its process may stop at guardrails or conclude that the tested functionality is broken. A suggested locator change, wait adjustment, or data fix still needs review against the intended user outcome. If the product behavior is genuinely broken, preserve the failing test and fix the application. A healer that skips a test because it believes the feature is broken does not show that the feature works. See Playwright Test Agents.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Could version or browser differences explain a CI-only failure?
Record the Playwright version, browser project, operating system, dependencies, and whether the installed browser binaries match the package. This gives you evidence for investigating differences between local and CI runs without assuming a version mismatch is the cause. Playwright recommends keeping its browser binaries aligned with the package and updating Playwright regularly; its browser documentation covers browser installation and version alignment. The Test Agents documentation also says to regenerate agent definitions when Playwright is updated so they use current tools and instructions.
Quick Recap
A practical debugging sequence
- Classify the first failure. Use the first error and call log to identify the operation and timeout domain.
- Reproduce and inspect. Run the failing test, use UI Mode or Inspector, and review logs, network activity, DOM state, screenshots, or a trace.
- Validate the locator and page state. Confirm the locator targets one intended element and determine whether the page reached the expected state.
- Fix synchronization at the condition. Replace guessed sleeps with an actionability-aware locator action or a web-first assertion; investigate if the condition never appears.
- Tune only the relevant timeout. First establish that the operation and expected duration are valid, then adjust the appropriate limit if needed.
- Treat retries and agent patches as evidence to review. Investigate fail-then-pass behavior and verify any proposed change against the intended product behavior.
- Compare the environments when the failure is CI-specific. Record package, browser, operating system, dependencies, and browser-binary alignment.
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