Advanced Guide to Regression Testing

The regression tests are a fundamental pillar of software quality control. They ensure that when changes or new functionalities are introduced, existing processes are not broken. At OteroQA, we apply a strategic approach to ensure that each delivery remains stable, fast and reliable.

 

What are regression tests?

Regression testing allows you to verify that the software continues to function correctly after code changes. They are especially important during frequent deployments, upgrades or new module integrations.

regression testing

 

Manual VS automated regression tests

FeatureManual RegressionAutomated Regression
Speed of executionSlow, depends on the human teamHigh, especially in repetitive tasks
Initial costUnderHigh (development of scripts and tools)
ScalabilityLimitedHigh (allows you to run hundreds of tests quickly)
Error detectionMay be less accurateConsistent precision in every execution
Requires human interventionYesNo (after configuration)
MaintenanceUnderMedium to high, depending on complexity
Ideal forExploratory tests, complex UIRepetitions, continuous regression, CI/CD

📌 At OteroQA we combine both strategies to get the best of both worlds.

How do we implement this in OteroQA?

  1. Identification of sensitive areas.

  2. Design of customized test cases.

  3. Automation of frequent tests.

  4. Clear documentation of results.

  5. Retests after bug resolution.

In our bug tracking serviceIn addition, we perform an exhaustive post-regression check to verify each correction.

 

Common cases where to apply them

The regression tests are not only applied in large projects; they are useful in multiple contexts of modern development. Here are some frequent situations where their application is key:

  • Security updates: even small patches can affect previous functionalities.

  • Technological migrationssuch as changes in databases, frameworks or operating systems.

  • Code refactoringwhen the existing code is optimized, without changing visible functions.

  • Integration of new functionalitiesIt is common for a new feature to impact areas that have already been developed.

  • Correction of errorsWhen fixing a bug, it is essential to make sure that no new bugs have been introduced.

These situations occur frequently in agile or DevOps environments, where release cycles are fast. That is why at OteroQA we integrate regression testing as an essential part of continuous development.

In addition, we invite you to read about our software testing trends for 2025where we address how regression is integrated into new quality methodologies.

 

Benefits of regression testing

  • They guarantee a stable user experience.

  • Reduce production risks.

  • Enable agile and secure development cycles.

  • They are key to work with DevOps and CI/CD methodologies.

Regression testing is not optional: it is a necessity for any evolving product. At OteroQAWe design specific testing plans to ensure that each change adds value without introducing hidden bugs.

Ready to release a new version with confidence? Contact us today.

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