Playwright trace artifacts make CI UI failures reviewable after the browser is gone

Playwright trace artifacts make a CI UI test failure reviewable after the browser session is gone. Playwright documents Trace Viewer as a tool for exploring recorded traces after a run, including DOM snapshots, actions, network requests, console messages, source, parameters, return values, and logs. That evidence matters because the CI browser cannot be inspected live once the job ends.

A failed UI test without a trace often leaves only an assertion message and a guess. Was the button missing, covered, disabled, late to render, or on a different route? Did the request fail, did the selector match the wrong element, or did the browser click before hydration completed? A trace can preserve the state needed to distinguish those cases.

A useful CI setup should decide when traces are collected, where they are uploaded, how long artifacts are retained, and which command opens the trace locally. The test failure note should include the test title, browser, viewport, retry count, failed action, screenshot or trace artifact, and the first network or console clue if relevant.

Do not treat trace collection as a luxury only for large teams. It is a small way to turn “works locally” into a reviewable record. The goal is not to watch every run; it is to have enough evidence when the one failure matters.

Playwright trace artifacts make CI UI failures reviewable after the browser is gone

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