Smoke testing should be conducted early and often in the software development process to help with build validation and confirm readiness for further testing. Bugs are usually easier to correct in the early development stages, so it’s important to identify issues early. Smoke testing is an effective way to detect major risks quickly.

What Is Smoke Testing?

Smoke testing checks the basic functionality of a software program. Its purpose is to test whether the software can perform the tasks it’s designed to carry out without “smoking,” or failing.

Ideally, teams should run smoke tests at key checkpoints in the QA workflow (for example, after a new build or deployment to a test environment). Together with sanity testing, smoke testing is a great way to make sure that the software performs its basic functions after each update.

Why Smoke Testing Matters in Modern QA Workflows

Smoke testing is a fast, effective way for QA teams to check on a software program’s core functionality after each build. It’s a good way to ensure that developers don’t waste time fine-tuning fundamentally unstable software. 

Running regular smoke tests also supports the CI/CD pipeline, making it easy to check that code updates aren’t impacting the software’s basic performance and providing a stable basis for further testing. 

CI/CD smoke tests enable early build acceptance and speed up the whole development process, preventing wasted regression cycles by ensuring that QA teams don’t spend hours conducting advanced testing on unstable programs. Essentially, smoke testing acts as a surface-level validation, which is preliminary to additional testing. Using smoke testing tools as a gate can free up your QA personnel and resources for other tasks.

Thanks to its rapid feedback cycle, smoke testing also increases deployment confidence and improves performance and efficiency throughout the CI/CD pipeline. The right smoke testing tools, like Ranorex Studio, are designed for ease of use, which can help teams standardize and scale smoke tests across different skill levels.

When Should Smoke Tests Be Run?

Smoke tests should be run throughout the software development cycle to catch bugs early on. They should be used as a quality gate after deployments to the testing/staging environments and during pre-release cycles to ensure that your team has time to catch and correct any bugs before the software goes through to the next development stage. 

Here are the other key moments for smoke testing.

Before Merging Code

Smoke tests can serve as a quality check before merge (often as part of pull request validation), helping confirm the build is stable before changes land in the main branch. Performing smoke tests before merging helps protect your main codebase from major breakages.

After Each Build in CI/CD

Running smoke tests after each build ensures that you catch any problems right away, so your team can correct them before you move on to further testing stages or to the next build.

Before Starting Manual or Automated Regression Suites

Regression testing can be time-consuming and resource-intensive. It’s a good practice to conduct smoke testing first to ensure that the fundamentals are in place before doing more complex testing.

Smoke Testing Example

Imagine that you run an e-commerce business, and you’re building a shopping app. A smoke test will check to see if users can perform the basic tasks in the software, like log in, add items to their shopping cart, and check out. 

Later in the process, you’ll conduct further testing to fine-tune the app’s performance and speed and minimize errors. If you update the app in the future to add more functionality, you’ll conduct another round of smoke testing before your next round of advanced testing.

Smoke Test vs. Sanity Test vs. Regression Test

Smoke testing, sanity testing, and regression testing are all crucial elements in software development. Here’s how the different forms of testing relate to one another:

How to Design and Perform Effective Smoke Tests

These are the crucial elements to keep in mind when you’re designing and conducting smoke tests.

1. Identify Critical Paths

The critical paths are the core elements of a software’s functionality. If these don’t work, then your program will go up in smoke, so to speak. Typically, the critical paths include logging in, data entry, and maybe adding items to a cart.

1. Keep Tests Shallow but Wide

Your smoke tests should cover a broad range of issues, without delving too deep into any one issue. Smoke testing should check each of your program’s basic functions just to see if they work or not. If they don’t work, then it’s time for further probing.

1. Limit Runtime

Speed is essential for smoke testing. Design your test to deliver feedback very quickly. Remember, it’s not a deep dive; keep the test as straightforward as possible.

1. Ensure Consistency Across Builds

It’s important to run the same core set of tests on every new build so you can control for variables and ensure that the software is consistently functional.

1. Keep Dependency Chains Simple

Your smoke test should be straightforward and focused on testing the software itself, with minimal reliance on external services or fragile dependencies when possible.

1. Avoid Flakiness

A flaky test is one that might pass on the first try but then fail on the second, without any clear changes to the software itself. As far as possible, your smoke tests should deliver consistent results.

Why Smoke Testing Works Best With Automation

Smoke testing requires frequent test cycles and reliable execution in order to deliver reliable results. That’s why using automation is the ideal way to conduct smoke tests.

Automated smoke testing ensures that smoke tests can be carried out with the frequency they merit, without any skipped tests. Using automated tools also greatly reduces your manual overhead, freeing your QA team up for more complex, less repetitive tasks.

Using automated tools for smoke testing improves the CI/CD pipeline functionality, ensuring that each new code change doesn’t endanger the build and that core functionality remains stable. In short, automation enables greater stability and build acceptance throughout the development process.

Automated Smoke Testing With Ranorex Studio

Automating your smoke testing with Ranorex Studio is a straightforward process; here’s how it works.

Build Fast, Repeatable Smoke Tests

Ranorex Spy is purpose-built for object identification. With reusable modules and cross-platform consistency, the tool makes it easy to build straightforward smoke tests that you can use repeatedly.

Image: Inspect and identify UI elements with precision using Ranorex’s powerful object recognition. View element properties, validate locators, and ensure stable, reliable test automation.

Use DesignWise to Optimize Your Test Coverage

DesignWise helps eliminate overlapping, redundant test paths by identifying minimal sets of meaningful scenarios. This improves your efficiency during the early testing phase, speeding up the whole process.

Execute Smoke Tests Quickly With Detailed Reporting

Ranorex Studio’s test runner runs automated tests across multiple platforms and browsers. Its rapid execution enables faster repairs, while rich reporting and screenshots provide QA teams with detailed insights into any bugs that arise. The tool also integrates seamlessly with CI pipelines.

Image: Get clear, actionable insights into test execution with detailed, easy-to-read reports. Quickly review pass/fail results, screenshots, logs, and error details.

Support for Web, Desktop, and Mobile

Ranorex delivers cross-platform capabilities so you can test for real-world functionality across devices and browsers. 

Tools That Support Test Creation for All Experience Levels

Ranorex Studio’s tools are designed for intuitive functionality and ease of use, no matter what level of expertise and technical training your teams have. Ranorex Recorder is ideal for low-code creation, with code-based customization for advanced engineers. 

Image: Create automated tests quickly by recording user interactions across desktop, web, and mobile applications—no coding required. 

Driving Efficiency With Smoke Testing

Smoke testing is one of the best tools a QA team has at its disposal. It’s a fast, highly effective way to check whether a software program is functional and can be moved into further stages of testing. By performing regular smoke tests, QA teams can speed up a program’s time to market and make the best possible use of their resources.

Ideally, smoke testing should be performed frequently, at key moments throughout the development process. Automating the smoke testing process makes this possible and easy, reducing the strain on your resources and ensuring consistency. Ranorex’s suite of tools puts automated smoke testing within the reach of just about any team. Start your free trial today and find out how intuitive automated testing can transform your operation.