Table of Contents

    Introduction to Regression Testing

    • November 04, 2022
    • 7 min

    What is the regression testing definition? What are the advantages of regression testing? How to perform regression tests? What is the basic difference between regression testing and retesting? Don’t let these questions bother you. This blog will assist you in gaining knowledge about regression testing.Try to understand by example. Suppose you created a small water reminder app. The app will notify the user to drink water. For every two hours it reminds them to do so. You tested the application after building it, and it functions well. You want to add fitness monitoring to the app in the next round of development. This time, after testing the fitness monitoring functionality, you also test the first functionality - water reminder. We call this as regression testing.Testing is sometimes neglected. Also, obtaining less importance than development. The importance of it is equal to or greater than that of development. It is because a feature-rich app that is unstable may cost business dollars and member base erosion. As a result, maintaining the top standard of software is essential. The Quality assurance team does regression testing. To determine if the software is working as intended upon any new feature enhancement or major update.

    What do you mean by Regression Testing?

    Software testing known as “regression testing” used to ensure that current software or code changes did not negatively impact already-existing functionalities. It ensures that modifications implemented to the application code must not damage the current application functioning. Such code modifications might, for instance, introduce new functionalities, correct issues, or update an existing functionality.

    In short, in order to verify that the app’s capabilities are operating as intended, testing entails running previously passed test scenarios again with the updated version. Additionally, It is a set of checks rather than a unique test that is run each time something new functionality is added.

    There are various advantages of regression testing. It guarantees whether any code modification has negative effects on other functionalities or not. It ensures that problems that have resolved should not come back. Also, it acts as a risk-reduction tactic when testing. Thus, it is simple to learn, comprehend, and analyze. On the other hand, there are some points to keep in mind. It takes time and we need patience. Each time a code line changes, you have to perform the testing. You need to write difficult test cases to perform the test. Therefore, you must consider both perspectives before choosing.

    How to perform regression tests?

    A QA analyst must be aware of several common testing techniques.

    • Pick the data that need retesting. The test script you choose to run relies on the section in which the code has changed, so you won’t run the full test set. The test data are split into two categories: reuse test cases and obsolete test cases. While identifying the reusable test case, choose the cases for checking an app’s functioning and characteristics that visitors may see that have recently changed the code base.
    • Calculate how long it will take to run the chosen tests. The QA team’s preparation of tests, the evaluation of all tests, the generation of testing data, and others are a few aspects that influence execution time.
    • The QA team may choose which test scripts to automate depending on the observations of the testing process. You may reuse the same script over and over again with automation testing cases, which are quicker than manually testing. Depending on the need, you can choose between automated and manual testing.
    • There are 4 testing methods performed most commonly. Choice of Regression Testing, Prioritizing test cases, Retesting all and Hybrid. The hybrid approach is the most successful of all these. This really is due to the fact that you run the necessary test instances dependent on whether you intend to initially do regression test selection or test case prioritisation, rather than picking all at once. As a result, it saves a great amount of time and energy.

    Which are the tools used for regression testing?

    Here are the best testing tools for the professional choice for regression testing.

    • Testsigma – Regression testing works well using Testsigma, one of the best automation test tools available. This tool’s creation of scriptless tests in simple English is one of its benefits. The ability to create original functions and provide requirements for regression test suites is another feature of .
    • Watir – Ruby-based Watir is an open-source tool. This application enables testers to create test cases that are simple to read and comprehend. Watir also offers a simple and adaptable UI.
    • Selenium – You may be familiar with Selenium, a popular software for testing for cross-platform or web regression testing. It offers automated test cases using datasets and is ideal for in-depth QA on a big scale.
    • Apache JMeter – For monitoring the effectiveness of test cases, Apache developed Apache JMeter. JMeter’s primary capabilities include the ability to execute load and efficiency tests, measure service reliability, and offer an end-user testing platform.
    • TimeShiftX – TimeShiftX, one of the most advanced regression automation testing tools available, will be popular with the QA team. The USP of this solution provides firms with a competitive edge by reducing test cycles and resource use. Additionally, it enables businesses to deliver the software rapidly, which is why TimeShiftX is very well-liked by testers.

    What are the challenges faced during Regression Testing?

    There are various challenges we can face during testing. The test suite grows pretty extensive when regression tests we perform repeatedly. The whole kit may not run due to time and funds restrictions. It might be difficult to determine how frequently regression tests should run, such as after each modification, each build update, or after a large number of problem fixes. Getting maximal test coverage while minimising the test suite is still difficult.

    Difference between regression testing and retesting

    Regression testing focuses on test scenarios, both positive and negative. Automated test scenarios are possible. We prioritise it less than retesting and is thus carried out concurrently. It determines if a change has rendered the current features unusable. Furthermore, it checks for faulty flaws once a modification has been made. It is possible to acquire test cases before the testing process begins.

    On the other hand, retesting focuses primarily on test scenarios that failed. No test case automation is possible. We do it to fix particular flaws. It is impossible to get test cases before the testing procedure has begun. It determines if a repair results in a unique problem in the software. Retesting is carried out first since it has a greater priority than regression testing. It only looks for errors that were present at the beginning of the testing procedure.

    In short, retesting refers to running tests once more after fixing the code base or if a test case fails during the final implementation. Whereas, regression testing refers to making sure that an update or modification is not impacting the functioning of the current application.


    Testing is essential if you wish to create reliable, high-quality products that encourage user loyalty. Taking such possibilities into account, we have given you a complete description of regression testing and have covered all the questions in this blog.


    Which is automation regression testing software?

    You can use Selenium ( and Perfecto ( for automated testing.

    What is regression testing in agile?
    With agile development, testing should first progress with each sprints, and analysts must ensure that new modifications do not interfere with the app’s previous and current functions.
    Where to get testing services in the USA?
    The rate for software testing in USA is more compared to India. You can go for remote software testing at affordable rates saving finances. Book a free consultation now!
    What is an example of regression testing?
    Suppose you want to create a timer app. The app will notify the user on the selected time. You tested the application after building it, and it functions well. Now, you want to add task management to the app in the next round of development. This time, after testing the task management functionality, you also test the first functionality – timer. This is the example for regression testing.
    What are types of regression tests?
    Corrective, progressive, retest-all, partial, selective, unit, and complete are types of regression testing.

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