How do I stop my E2E tests from being so flaky?

First, separate diagnosis from treatment. Don't just fix failing tests—investigate whether failures are environmental or app-related. Most flakiness comes from unstable test environments, not the tests themselves. Stabilize your environment (isolate it from staging, standardize device images, mock external services where possible), then re-evaluate test reliability.

Should I hire someone to maintain E2E tests full-time?

Not if you're doing it to fix broken tests all day. That's a waste. But yes, if that person is building infrastructure—improving test environments, implementing observability, defining ownership, reducing noise. Infrastructure investment pays dividends. Test maintenance does not.

Will E2E tests ever be as fast as unit tests?

No. By definition, they're slower. The goal isn't speed—it's reliability and trust. If your E2E tests are fast but noisy, they're useless. If they're slow but trustworthy, developers will actually pay attention to them.

🏗️ DevOps & Infrastructure

Why Your E2E Tests Keep Failing (And Why Fixing Them One-by-One Is a Trap)

You've been patching broken E2E tests for months. Your team's confidence is shot. The problem isn't the tests themselves—it's that you're treating symptoms instead of disease.

Open Source Beat Apr 03, 2026 5 min read 17 views

CI/CD pipeline showing red failing tests and a developer frantically debugging, representing the reactive test maintenance cycle

⚡ Key Takeaways

Reactive test maintenance—constantly patching failing tests—doesn't improve reliability; it masks infrastructure problems and wastes engineering time. 𝕏
Most E2E test flakiness comes from unstable environments, not the tests themselves. Isolate your test environment from staging, standardize device configurations, and invest in observability first. 𝕏
Define test ownership, reduce alert noise, and build trust before expecting developers to act on test failures. Without these foundations, test suites become ignored liabilities. 𝕏

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Originally reported by Docker Blog

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