Beginner’s Guide to Regression Testing

Software testing

  • Whitebox testing. Whitebox is focused on the internal workings of the software. It is used to verify different software applications.
  • Blackbox testing. Blackbox testing does not focus on internal mechanisms, but instead on the output of the software. BlackBox testing is sometimes referred to as functional testing because it focuses only on the software being tested.

What’s regression testing?

  • Code Modification
  • Patching
  1. These changes don’t affect other areas of the software.
  2. The added code is bug-free.

Regression testing (Do small changes need to be tested)?

  • Be confident in future changes. If you can identify the changes that have occurred in the past, it will be easier to pinpoint problems.
  • Maximize secondary features’ value. Secondary functions may be the reason that someone uses your software. While primary functions do work, secondary functions can be just as important.
  • Take proactive steps to resolve issues. Regression testing lets you spot potential problems before they arise. Regression testing saves time and money because you don’t need to pay your developers for additional work.

Which change types are subject to regression testing?

  • New functions. Regression tests are most commonly used to test new functions in software. If you add code to an existing program, it must be compatible with the new one. The new code is often added by developers without taking into account its compatibility. Regression testing is used to identify problems.
  • New integration. A regression test can also be performed when you are integrating two products. It ensures that both products function as intended.
  • Revision of functions. Sometimes developers may need to fix software in order to meet functionality requirements. Sometimes, developers need to correct software functionality. This can sometimes lead to unexpected problems. Regression testing is used to verify that the product works as intended.
  • Fixes for bugs. Developers fix bugs that are already present. This is the fourth type of change. Sometimes fixing one bug can lead to another, so developers must modify the source code. Regression testing ensures that the changes made to the source code didn’t cause any problems or make any other changes to the program.

Regression testing

Corrective regression testing

Retest All Regression Testing

Unit Regression

Partial Regression

Complete Regression

Regression testing

  • Conduct a smoke and sanity check
  • Determine Code requirements
  • Regression testing

Regression testing

  • Too expensive
  • It is difficult to optimize and maintain

Regression testing can be too costly

Maintenance & Optimization





I work as a Senior Testing Specialist at TestingXperts. I am a testing professional accustomed to working in a complex, project-based environment.

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Serena Gray

Serena Gray

I work as a Senior Testing Specialist at TestingXperts. I am a testing professional accustomed to working in a complex, project-based environment.

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