Debugging Failed Tests with Playwright Trace Viewer

When an automated test fails in a continuous integration environment or a local run, figuring out why can feel like solving a mystery with missing clues. Playwright Trace Viewer solves this by capturing a complete record of your test execution so you can inspect exactly what went wrong after the fact. This text-only course guides you from the absolute basics of test debugging to confidently resolving complex test failures. You will learn to read execution timelines, inspect DOM snapshots, analyze network traffic, and diagnose flaky tests using modern postmortem debugging tools. What you'll learn: Understand the fundamentals of postmortem debugging and how traces are recorded; Configure Playwright to automatically capture traces locally and in CI/CD pipelines; Inspect DOM snapshots, console logs, and test source code step-by-step; Analyze network requests and responses to identify API failures during test execution; Identify and resolve flaky tests by examining retry attempts and timing issues; Apply best practices for writing resilient locators to prevent test fragility. The course begins with foundational concepts of test execution and tracing before moving into the analysis of failed test runs. You will progress through real-world debugging scenarios, learning how to isolate issues in UI interactions, network states, and asynchronous operations. This course is designed for beginner QA engineers, frontend developers, and anyone looking to improve their test debugging workflow. No prior experience with Playwright tracing is required. Start mastering postmortem debugging and make test failures easy to solve today.