My Python tests passed. Production still broke.

📰 Dev.to · Nico Reyes

Passing tests don't guarantee production-ready code, learn to identify and address edge cases

intermediate Published 30 Mar 2026
Action Steps
  1. Write tests to cover edge cases using tools like Pytest or Unittest
  2. Use fuzz testing to simulate unexpected user inputs
  3. Configure testing frameworks to run tests in parallel for faster feedback
  4. Apply testing principles like equivalence partitioning to reduce test cases
  5. Compare test coverage reports to identify gaps in testing
Who Needs to Know This

Developers and QA engineers benefit from understanding the limitations of test suites and the importance of edge case testing to ensure production-ready code

Key Insight

💡 Green tests are not a guarantee of working code, edge cases can still cause production breaks

Share This
🚨 Passing tests ≠ working code! Don't forget to test edge cases 🤦‍♂️

Key Takeaways

Passing tests don't guarantee production-ready code, learn to identify and address edge cases

Full Article

Green tests don't mean working code. Learned this the hard way when production users found edge cases my test suite missed.
Read full article → ← Back to Reads

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