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Regression testing definition

What is regression testing?

Regression testing is type of testing carried out to ensure that changes made in the fixes or any enhancement changes are not impacting the previously working functionality. It is executed after enhancement or defect fixes in the software or its environment. It can be difficult to determine how much re-testing is needed, especially near the end of the development cycle.

This type of testing typically carried out by testing specialist peoples. The automated testing methods are the best and safe option to carry out the Regression testing. In the market there are many free as well as free (open source) software testing tools are available. In the larger software development project the Regression testing is commonly used.

Some of the most commonly used regression testing tools list:

It is a verification method & mainly done in system testing but it applicable to all levels of software testing (Unit testing, Integration testing, System testing and Acceptance testing.)

Good Regression tester need to aware of what all features to be focus on changes in the software application.

“The main aim of regression testing to make sure that changed component is not impacting the unchanged part of the component”.


Every time after making changing in the existing working code, a suite of test case have to executed to ensure that changes are not breaking working features and not introduced any bugs in the software. It is essential to prepare such test suite & executed on every newer version of software. Also to automate the regression testing this test suite will help to create a automated testing script.

In the Software regression testing, tester has to do only the execution of previously executed test cases & compare the result with previously test execution result. If there is not conflict between results then we can say that the regression testing is passed.

In this type of testing new test cases are not created but previously created test suite is executed to find regression defects.

How to define the scope of regression testing?

The scope of testing is based on the how large fixes or enhancements of features. If this is impacting in the larger area of the application then scope will increase proportionally & it requires the deep testing of application including relevant test cases execution. But to analyze this tester should get the correct inputs from developer to decide the scope.

But if you are testing GUI applications the doing regression testing is very difficult. If the changes made in the GUI then all test cases written will not reused. In case if the project is big then it is very hectic work to update the GUI test cases. You have to write it again different test case for updated GUI once again.

Software testing resources:
To get more learning on how regression test is used in the actual environment, here are some useful resources for learning about regression testing in the Software Testing Class:

1) Regression testing is one step ahead than retesting: Many of the testers are confused about the terminology. In this class I am explore on difference between the two terms & how regression and retesting is relate to each other with the regression testing examples.

2) How to select effective test cases in Regression testing?

3) Simple steps to for automate the regression testing–


If you like reading above article, please take a step to share over your friends. You can ask your questions/suggestions/tips in the comment section below and I’ll try to answer as many as I can.

18 comments to Regression testing definition

  • Ramkumar

    its great stuff. thanks for sharing… waiting for your next update.

  • Suraj Mane

    I like how well this has obviously been written. The main points are tangible, interesting and well thought out. This is really good reading.

  • Sumitra

    Thanks for the marvelous posting on Regression testing! I seriously learned by reading it. I want to encourage yourself to continue your great posts.


  • Rajan

    hi currently I am working as graphics designer in the mobile application from 6 months. I would like to switch carrier to testing, could someone please guide me or tell ‘is it ok to switch?’.

  • Penny Imes

    Love what you are doing with the software testing man!

  • Kannan Manoharan

    Nice to see your article and i’m sure that this will help and attract the beginners. request to post more such a info.

    Kannan Manoharan

  • Subha jyoti

    most important to think upon…good one

  • Tejas

    Thank you for sharing your article. Thank you all for your information and comments

  • Manoj L

    Hi ,

    Thanks for evrything that you hav provided , this is really fantastic article . expecting more from you like this.

  • Soumya

    Hi Folks,
    This is the simplest yet very informative way of explaining this article. Explained for beginners yet contents were for professional…
    Nicely done.

  • Kavita

    Really helpful post, so thank you so much.

  • Sameer

    Hi, this is Sameer from Pune, i had done Manual testing overall 4 years mostly for Branch Banking Application, so i am interested for Banking domain …

  • neha f

    Nice article,very helpful in learning how to update the CV

  • Vishal J

    this type of articles really helps to all the testing engineers in order to test software applications more easily. thanks for this post.

  • how can i make the regression suite for regression testing


  • Abhishek

    what is status of bug in regression testing?

  • bhushan

    Simply superb..great website to learn about testing….

    Thanks a ton..

  • Hardik

    Regression testing is most importance portion for interview process great man easily understand nice man. nice explain.

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