The Browser Test Passed. The Product Still Broke.

Short summary

Browser tests that pass on simple click flows miss the bugs that matter: SSO redirect failures, stale service worker data, session restore issues, and non-deterministic AI outputs. Modern authentication is a distributed workflow crossing domains, popups, and callback URLs that needs its own test strategy. The article argues that meaningful browser testing must cover state transitions, recovery paths, and browser-managed identity state rather than just happy-path interactions.

• •Modern auth flows are distributed workflows needing dedicated test strategies beyond simple login tests
• •Browser-managed state (autofill, session restore, permissions) causes bugs invisible in clean CI environments
• •Non-deterministic AI features like search and chatbots require new testing approaches for browser automation

Generated with AI, which can make mistakes.