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What are the details you need to know about regression testing?

What are the details you need to know about regression testing?

Regression testing is a key element in software development and quality assurance because it ensures that newly developed changes or updates do not introduce new defects or otherwise affect other functionalities of a software application. In this article, we will explore the essential details about regression testing, shedding light on its significance, process, and best practices.

What is Regression Testing?

Regression testing is a fundamental testing technique used in software testing to confirm if new changes made in an application such as bug fixes, improvements and updates have negatively impacted the existing functionalities of the application. The primary goal of Regression testing lies in detecting and precluding the possible introduction of new defects so that the software would remain fully functional.

  • Continuous Quality Assurance: Regression testing is not a one-time event but continuous process throughout the software development life cycle. It checks that any changes, whether small or big, do not undermine the entire software quality and its reliability.
  • Test Suite Maintenance: Effective regression testing necessitates a dedicated test suite. This is a collection of tests cases covering key functionalities and scenarios. As the software changes, this test suite has to be updated to cater for newly added features and alterations.
  • Automation Benefits: Regression testing and Automation. This approach is efficient, especially for applications with frequent updates. Automated test scripts can run a large number of test cases very quickly.
  • Selecting Test Cases: It is not necessary that all these test cases should be executed over every regression cycle. The test cases are chosen in accordance with how relevant they are to the new code changes. This method allows concentration on areas that are likely to be impacted.
  • Prioritization: The regression test cases are organized to cover the critical functionality first, before less vital ones. This aids in spotting early problems that can greatly affect the application’s use.
  • Baseline Comparison: In regression testing a standard baseline is established from a known stable version of the software. Then the next test runs are compared to the baseline to detect any departures from the expected standard.
  • Version Control: The codebase must be managed using version control systems as well. It ensures that developers and testers are working with the current versions of the software while testing.
  • Bug Tracking: Defects detected during regression testing are logged, prioritized, and fixed. Testing and development teams ought to work together for timely fixation of bugs.
  • Continuous Integration and Continuous Delivery (CI/CD): Regression testing is a part of CI/CD pipelines, where automated tests are run whenever code changes are committed. It ensures the stability and reliability of the application in agile development environments.


In the dynamic software development landscape, Regression Testing protects the integrity of software applications by detecting and fixing possible problems resulting from code modifications. It is important to understand the nuances of regression testing, such as its continuous aspect, test suite maintenance, and the benefits of automation, in order to achieve consistent delivery of high-quality software products. What is Regression Testing can be integrated into the development process and this can provide greater confidence in the reliability and stability of the applications.

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