Browser Tests Catch the Bugs Unit Tests Politely Ignore

Unit tests are useful, but they can be polite. They confirm small pieces of code behave in isolation. Users do not experience your product in isolation. They click through pages, submit forms, wait for network calls, and run into browser behavior.

Browser tests are where the full journey gets checked.

Test the paths that cost money

You do not need hundreds of end-to-end tests to get value. Start with the paths where failure would hurt: lead form submission, checkout, login, booking, search, account updates, and admin publishing.

A few stable tests on critical flows can catch regressions before customers do.

Keep them maintainable

• Test outcomes, not implementation details.
• Use stable selectors for important controls.
• Run tests in CI before deployment.
• Capture screenshots or traces for failures.
• Delete brittle tests that no longer protect real behavior.

Browser tests are not about perfection. They are about confidence in the journeys the business depends on.

Photo by Markus Spiske on Pexels.