Regression testing vs Smoke Testing

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Smoke testing and regression testing are two important methods of quality assurance in software development. While they share some similarities, they are used for different purposes and have different benefits. 

In this blog post, we will explore the differences between smoke testing and regression testing, and when each should be used. By the end, you will have a clear understanding of when to use each method in your own development process.

Software testing is a process that helps ensure the quality of a software application. There are various types of software testing, each with its own benefits and drawbacks. In this blog post, we will be discussing two specific types of software testing: regression testing and smoke testing.

Regression testing is a type of testing that is used to assess whether changes made to a software application have introduced new bugs. On the other hand, smoke testing is used to determine if an application is stable enough to be tested in-depth.

So, which type of software testing is right for you? It depends on your needs and goals. Read on to learn more about regression testing vs smoke testing so that you can make an informed decision for your next software project.

What is regression testing?

Software testing called regression testing aims to find new defects in functionality that already exists. A regression test is not about testing a new feature; it’s about finding bugs in code that used to work correctly. This can happen when code is changed for any reason, including bug fixes, enhancements, and even refactoring.

A crucial step in the software development process is regression testing. It helps ensure that changes made to the codebase don’t break existing functionality. This can save a lot of time and frustration down the road, since fixing bugs is usually much easier than trying to track down the root cause of a problem.

There are many different approaches to regression testing. One common approach is to create a suite of tests that covers all of the functionality in the application. These tests are then run whenever a change is made to the codebase. 

Another approach is to select a few key areas of the application and create tests specifically for those areas. These tests are then run on a regular basis, such as nightly or weekly.

No matter which approach you take, regression testing is an essential part of maintaining software quality.

What is smoke testing?

Smoke testing is a type of software testing that focuses on verifying the key functionality of an application or system. Smoke tests are typically run early in the development process before more time-consuming and detailed regression tests are performed.

The goal of smoke testing is to identify any major issues with an application or system so that they can be fixed before more extensive testing is carried out. A smoke test may, for example, verify that a login screen can be accessed and that data can be entered into a form.

Smoke testing is usually quick and easy to carry out, as it only focuses on key functionality. This makes it an ideal way to check for major problems early in the development process.

If you are new in Smoke & Sanity testing, our experts have written a detail blog on Sanity testing vs Smoke testing so feel free to visit & read our blog.

Pros and cons of regression testing

Regression testing is a type of software testing that seeks to identify bugs after changes or updates have been made to a software program. The main goal of regression testing is to ensure that no new bugs have been introduced with the changes or updates and that existing functionality has not been affected.

There are several benefits to regression testing, including:

– Helps to ensure the stability of a software program

– Can be used to verify fixes for previously identified bugs

– Can be used to identify new bugs that may have been introduced with changes or updates

There are also some potential drawbacks to regression testing, which include:

– Can be time-consuming and resource-intensive, especially if done manually

– Changes or updates made during the development process can invalidate test results

Pros and cons of smoke testing

When it comes to regression testing vs smoke testing, there are pros and cons to each approach. Here’s a look at some of the key factors to consider:

Smoke testing is typically faster and less expensive than regression testing because it focuses on the most essential functions of a software application. However, smoke testing can miss important defects that may only surface during more comprehensive testing.

Regression testing is more thorough than smoke testing, but it can be more time-consuming and expensive. In addition, regression tests must be carefully designed to ensure that they cover all relevant areas of the software application.

When to use regression testing

Regression testing is a sort of software testing that looks for new flaws in functionality that already exists. A regression test is typically any test that is run more than once.

Smoke testing is a type of software testing that seeks to determine whether a software program can be initiated and operated without failure. A smoke test is typically any test that is run once.

So, when should you use regression testing? Regression testing should be used whenever changes are made to the code base, including when new features are added or bug fixes are made. Smoke testing, on the other hand, can be done less frequently since it simply checks for basic functionality.

When to use smoke testing

When it comes to regression testing, there are two main schools of thought: do it early and often, or wait until the end of the development cycle. Smoke testing falls somewhere in between these two approaches.

The biggest benefit of smoke testing is that it can catch major bugs before they become expensive to fix. By running a smoke test suite regularly, you can ensure that your code base is always in a healthy state.

Smoke testing is also a good way to get feedback on new features from end users. If a new feature breaks the smoke tests, chances are good that it will be confusing or difficult to use for end users as well.

On the downside, smoke testing can be time-consuming and tedious if not done carefully. It’s also important to remember that smoke tests only cover a small portion of the functionality in an application. So while they can be very helpful, they should not be relied upon as the sole source of information about the health of your code base.


There are several key differences between regression testing and smoke testing. Regression testing is typically more comprehensive, while smoke testing is more focused on high-level functionality. 

Smoke testing can be used to identify potential issues early on in the development process, while regression testing is typically done after a software change has been made. In general, both techniques can be useful in different situations and it’s often best to use both during the software development cycle.

Author BIO

Deepali Sharma is working as Sr. Software Test Engineer in Devstringx Technologies, the best regression testing company in India. Having 7 years of total experience in manual & automation software testing. She has worked on two different projects with one domains Health. She believes in sharing her knowledge through her blog.

I have 22 Year experience in website development, blogging, Seo, Link building. Digital Mareting Expert Certified By Hubspot Academy. Social Media Marketing Expert Certifed by Hubspot Academy. Google Adword Certifed Expert.

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