What is automated Regression Testing? How to Do It Properly

Automated Regression Testing

What is Automated Regression Testing?

Automated regression testing is the process of taking a manual test case and modifying it into automated tests. Manual test cases are often in the form of a spreadsheet or table, which details steps to be taken and expected results for each step.

Regression testing is a type of software testing that verifies that software previously developed and tested still performs after a change. Regression tests verify the application under test continues to function properly when modified. Typically, these changes are made to fix defects or add new features. However, they can also result from refactoring (changing the internal structure of an application’s code).

Regression testing is performed whenever there is a change to existing software. It is critical to ensure that no unintended side effects are introduced as a result of modifying existing code.

Here are some of the situations when we warmly recommend automated regression testing:

Automated regression testing should be used in three main scenarios:

1. Feature Helps Ensure Quality

When you’re developing a new feature or product, you’ll want to create automated tests to help ensure that the software is working as expected and that any code changes don’t break the existing functionality.

2. High Impact Features

Automated regression tests are most beneficial when they are being run on high-impact features in your application. For example, if your app has a checkout process, any changes made to that feature should be tested with an automated test so that you can detect any issues before they affect your customers.

3. Repetitive Tasks

Automated testing is especially beneficial for repetitive tasks. If there are certain steps in your application that you need to run through on a regular basis, or if there are processes that you need to be checked every time new code is released, those tasks can be automated so that you don’t have to rely on human testers to manually run them every time.

Best Approaches For Automated Regression Testing:

To augment the manual testing efforts and shorten the time to market, companies have adopted automated regression testing. It is usually done using automation suites that can run on a wide range of devices/platforms and give quick feedback on whether the recently-added code base has broken any existing code.

The most important thing in regression testing is to focus on testing scenarios where the bugs are likely to surface. In this post, I will share approaches for automated regression testing that I’ve seen or been part of.

In my experience, the following approaches work best:

Regression tests are split by test types (e.g., integration tests, UI tests) and executed independently from one another in an ideal case. If possible, divide them by execution time as well (e.g., unit/integration tests can be executed every commit vs. acceptance/UI tests executed nightly).

A prioritized set of scenarios should be covered during each test run (fastest first with more important scenarios). This will reduce the overall execution time and provide faster feedback on more critical use cases.

Regression tests can be further divided based on feature areas (e.g., search). This will reduce the overall execution time and provide faster feedback to developers working on these features.

Application 0f Automated Regression Testing:

Automated regression testing is a software testing method that uses special software to execute the test cases automatically. This type of test is used in areas where huge amounts of data have to be tested repeatedly and on a regular basis.

It is used to identify the defects or bugs in the application at an early stage in the software development life cycle.

Automated regression testing is only suitable for GUI tests when there is a lot of human interaction with the system. For example, in web applications, where you need to click on a lot of elements, it can be very time-consuming to do this manually.

Automated regression testing is an essential part of a software testing strategy. It can produce better quality software, faster development, and lower costs.

Regression testing is the process to check whether a recent update or change in the code or functionality of the application has not introduced any new bugs. It occurs when changes made to one part of the system cause problems with other parts.

The Benefits Of Automated Regression Testing:

It saves time and money: Manual regression testing requires a significant amount of resources including QA specialists, which increases the cost. Automated regression testing reduces the required number of staff and quickly reveals any bugs introduced into the system, saving time and money.

It results in faster feedback: Manual regression tests are time-consuming and often require multiple testers to complete. Automated regression tests can be run at any time to provide immediate feedback on errors introduced into the system. The faster you receive feedback on errors, the easier it is to fix them.

It’s repeatable: You can use automated regression tests over and over again without having to re-test everything manually every time you make a change. The same test can be reused for QA, UAT, production environments, and even for different platforms or browsers


Automated regression is the test automation best practices for everyone. If you’re building a small, simple application then automated regression testing might be overkill. It may not be feasible due to budget or technical limitations. Nonetheless, if you are in charge of managing dozens of projects with multiple developers and have limited time and resources, automated regression testing is a must-have.

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