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Quality at Speed: Regression Testing in an Agile Environment

Akriti Kishore

London's Bloomberg Airport terminal crashed.
The world's largest coffeehouse chain had to shut down stores in the USA.
A $1.2 billion military satellite launch failed.


Surprisingly all these accidents share a common reason- software bug causing product failure.

In 2021, IT spending on enterprise software is expected to amount to around 483 billion U.S. dollars worldwide, a growth of 7.4 percent from the previous year.- Statista

The evolving digital environment and changing customer demands encourage businesses to update software with new functions that may interfere with existing functions, affecting the overall performance of the product and eventually the brand. To avoid such a scenario, developers embrace top-notch QA (Quality Assurance) testing procedures and one of them is regression testing.

What is regression testing?

Regression testing verifies the new code in the existing system and ensures the seamless operation of the software, so that changes do not affect the core software functionality.

Fundamentals: Regression testing in agile

Agile methodology promotes the idea of regression testing. It relies on concurrent and continuous iteration of development and testing throughout the SDLC, enabling rapid delivery and best end-user experience.

In the agile development environment, the testers build regression test suite to verify that the new code does not conflict with older code and the existing codes are working as expected. This makes the regression testing in the agile environment imperative.

Best practices: Regression testing in agile

The best practices to bear in mind.

  1. Define a regression strategy:
    The foundation stone is creating a test strategy that must include gathering the test cases, inspecting the areas of improvements, estimating the time of execution and segregating them based on which test cases can be automated and which out of them can be manually implemented. Executing these steps will lead to effective testing outcomes.

  2. Smoke and Sanity test save testing time
    While a testing strategy is a way forward, it is important to perform checks that save the quality time and efforts of the testers, such as smoke and sanity tests. Smoke checks run non-exhaustive tests to check the core software functions and the sanity test checks the minor changes in the code to ascertain that the errors have been fixed and no further issues are introduced.

  3. Automate regression testing
    According to a recent study, more than 70 percent of businesses utilize automation in regression testing as it is a time and cost-effective way to ensure that the added functionality does not break the entire software. Test automation is executed every time a new functionality/code is added to the software.

  4. Regularly update regression packs
    One of the essential practices that must not be ignored is to update regression packs on a regular basis. A new feature comes with a set of test cases called a regression pack that is written and drafted with the help of a requirement specifications document and must be updated with the software update for effective test results.

  5. Continuous testing is a smarter way to test
    While Agile and DevOps encourage the idea of continuous integration and continuous delivery to accelerate software delivery, this shift left approach encourages testers to test and fail early , and improve faster, with rapid feedback ensuring quality software development, reducing costs and risks.

Benefits: Regression testing in agile

Regression testing offers multiple benefits when implemented in an agile environment.

  1. It verifies end-to-end functionalities of the software to build a stable software/application.
  2. It inspects and corrects functionality issues and related code defects earlier in the SDLC.
  3. Automating the testing process releases the tester to perform the other essential testing activities.
  4. Checking frequent iterations deliver high-quality software with great user experience.

Businesses competing in this digital world want to deliver the best quality software quickly, matching the growing needs of the customers. Regression testing in an agile environment helps such businesses to engineer next-gen software while maintaining the stability of the product throughout development stages.

Cygnet experts offer a wide spectrum of testing services and industry best practices to deliver quality products rapidly, keeping the technological needs of the business at the forefront. For more information, contact us: inquiry@cygnetinfotech.com.

Akriti Kishore

Akriti Kishore is a content writer at Cygnet Infotech. She is a software engineer turned writer who loves exploring the world of technology and digital marketing. She is an avid reader, a traveller ,a singer and a movie buff who live by the famous quote 'You only live once'

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