11 min
Playwright's New CLI Debugger Finally Works in Headless CI
Playwright 1.59 ships --debug=cli and scriptable trace analysis. The first debug surface that actually works where enterprise tests fail — headless CI.
Posts tagged "debugging"
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11 min
Playwright 1.59's Screencast API Ends Useless Test Videos
Playwright 1.59 ships a Screencast API with burned-in action annotations and chapter markers. Microsoft sells it for AI agents — the real win is CI triage.
13 min
Shared Session Cookies Corrupted Our Parallel Tests
Eight Playwright BrowserContexts were properly isolated, but they all loaded the same session cookie — so the server treated 8 parallel threads as one.
5 min
Playwright's onceDialog Has a Silent Handler Leak
Why onceDialog stays registered when no dialog fires, silently eating the next dialog from an unrelated action — and the onDialog/offDialog pattern that fixes it.
13 min
The Flaky Test Isn't Flaky — It's a Race Condition
How a 'flaky' Playwright test exposed a shared test user race condition in our parallel suite, and the isolation patterns that fixed it for good.