The Two Postgres Bugs the Tests Caught: A Real-DB Integration Test Case Study

📰 Dev.to · Jeremy Longshore

Learn how a no-mocks testcontainers policy caught two critical Postgres bugs in a real-DB integration test case study and why it matters for reliable database testing

intermediate Published 7 May 2026
Action Steps
  1. Implement a no-mocks testcontainers policy for your Postgres database
  2. Run integration tests using testcontainers to catch production-fatal bugs
  3. Configure your tests to check for schema USAGE removal and asymmetric SELECT grants
  4. Test your database schema and grants to ensure they are correctly configured
  5. Analyze test results to identify and fix potential bugs before they reach production
Who Needs to Know This

Developers and QA engineers on a team can benefit from this approach to catch critical database bugs before they reach production, ensuring the reliability and stability of their applications

Key Insight

💡 A no-mocks testcontainers policy can effectively catch critical database bugs, such as schema USAGE removal and asymmetric SELECT grants, before they reach production

Share This
🚨 Caught 2 critical #Postgres bugs with #testcontainers! 🚨 Learn how to implement a no-mocks policy to ensure reliable database testing #database #testing

Key Takeaways

Learn how a no-mocks testcontainers policy caught two critical Postgres bugs in a real-DB integration test case study and why it matters for reliable database testing

Full Article

A no-mocks testcontainers policy caught two production-fatal Postgres bugs in one test run — PG 15's schema USAGE removal and an asymmetric SELECT grant for a state-machine-driving sink.
Read full article → ← Back to Reads