What Are Regression Tests and Why Do They Make a Difference in eCommerce

Nobody wants to lose sales because of an invisible error. Yet every time you update your eCommerce, fix a bug or launch a new feature, you run the risk of something that previously worked stopping doing so. And the worst part is that these errors often don't stand out… until the customer abandons their basket. This is where regression tests come into play.

This type of test guarantees that, after every change, the shopping experience remains smooth and secure. In a digital environment where the competition is just one click away, launching new features isn't enough: you need to make sure that everything you already had continues to work just as well. That's why regression tests are a key pillar of any quality assurance strategy for digital businesses.

At seQura we understand what it means to manage an eCommerce where every detail matters. That's why, in this article, we explain how to prevent a simple technical error from putting your sales at risk.

What Are Regression Tests and What Are They For?

Regression tests are a type of software test whose main objective is to ensure that changes made to an eCommerce or digital product, whether updates, new features or bug fixes, don't negatively affect the existing operation of the system. In other words, they make sure that everything that worked before continues to work just as well.

The purpose of these tests is multiple. On the one hand, they allow you to identify unwanted side effects that may arise after changes. On the other, they help to preserve software quality, ensuring that modifications don't alter the shopping experience. They also serve to guarantee the stability of the online store and to prevent recurring errors that could reappear after being fixed.

This type of test is essential for protecting the day-to-day operations of an eCommerce. It forms part of any quality assurance strategy and allows you to anticipate technical failures before they affect conversion or the customer experience.

Types of Regression Tests

There are different types of regression tests that allow you to adapt to the needs and resources of each eCommerce or digital product. The choice of one type or another will depend on the scope of the changes made and the time available to run the tests. These are the most common:

• Corrective tests. They verify that the parts of the software that haven't been modified continue to work well after the changes. They are useful when modifications are minor and localised.
• Full test repetition. These involve re-running all existing test cases, including those not affected by the changes. Although they guarantee total coverage, they require more time and resources.
• Selective tests. They focus only on the modules or components related to recent changes. This approach saves time without sacrificing quality.
• Progressive tests. They validate that new features integrate correctly with the existing system, ensuring they don't compromise previous stability.
• Change-based tests. They select the specific test cases related to recent modifications in the code.

Each of these types can be combined with automation tools to optimise their execution and reduce validation times.

When and Why Should You Run Regression Tests in eCommerce or Digital Products?

Regression tests are indispensable in the development and maintenance of eCommerce and digital products because they guarantee a stable, error-free shopping experience. The key lies in knowing when to apply them and why they are essential.

It is advisable to run regression tests at these key moments:

• After updates or changes to the code. Every time you introduce new features, fix bugs or modify processes, it's necessary to check that everything continues to work correctly.
• Before an important launch. Tests ensure that the product is error-free before going to market.
• During agile development cycles. In environments where changes are constant, these tests must form part of every sprint.
• When integrating new platforms or systems. If you connect your eCommerce to APIs, payment gateways or other external modules, tests ensure compatibility and stability.

The main reasons for carrying out these tests include:

• Avoiding business interruptions due to technical failures.
• Guaranteeing a smooth user experience free of errors.
• Reducing costs and time by detecting errors before they affect the customer.
• Ensuring the quality and stability of the eCommerce after every change.

In agile and DevOps environments, where development cycles are fast and frequent, regression tests make it possible to maintain product quality and customer confidence.

Key Tools for Running Regression Tests

Having the right tools makes all the difference when it comes to running regression tests efficiently. In eCommerce and digital products, where speed and precision are essential, automation is the great ally. Here are some of the most widely used tools:

• Selenium. One of the most popular frameworks for automating tests in web applications. It allows you to run functional and regression tests across different browsers and operating systems.
• TestComplete. Offers a complete environment for automated testing of web, mobile and desktop applications. It stands out for its ability to create tests both with and without code.
• Katalon Studio. An all-in-one platform that allows you to automate web, mobile, API and desktop tests. It's ideal for teams looking for a comprehensive, easy-to-use solution.
• ZAPTEST. Specialised in test automation without the need to write code. It's compatible with multiple platforms and facilitates continuous integration.
• Valido App. A tool aimed at eCommerce that allows you to run functional and visual tests without technical knowledge, speeding up the validation of changes.

These tools allow regression tests to be fast, reliable and scalable, adapting to the needs of any eCommerce.

How to Structure an Effective Regression Test Plan

A well-designed regression test plan ensures that every change to your eCommerce doesn't affect the shopping experience. For this plan to be effective, it's essential to structure it clearly and in a way that is adapted to the needs of your digital business. Here are the fundamental steps:

1. Identify requirements. Define which areas of the eCommerce you need to validate. Prioritise business-critical features such as the purchase process, user registration or product display.
2. Design test cases. Develop test cases that cover both the areas affected by the changes and those that could be indirectly impacted. Prioritise cases according to their relevance to conversion.
3. Create a test suite. Group the cases into a robust suite that allows them to be run efficiently and periodically.
4. Plan and execute the tests. Establish a clear and realistic schedule. Wherever possible, automate the tests to speed up validation cycles.
5. Analyse results and document. Record every incident detected and make sure it is resolved before moving forward.

A solid plan will not only allow you to avoid technical failures, but will also contribute to improving product pages to optimise conversions and guarantee a stable, frictionless shopping experience.

The Importance of Testing the Payment Flow

The payment flow is one of the most critical points of any eCommerce. It doesn't matter how much work you have put into the design, speed or offer of your online store: if the payment process fails, the sale doesn't go through. That's why testing the payment flow is an essential part of any regression test plan.

Every time you implement a change in your eCommerce, from a new feature to a simple update of the payment gateway, there's a risk that something will break in the checkout. A small error can result in abandoned baskets, lost revenue and a frustrating experience for your customers.

Moreover, the impact is not only technical. A failure in the payment flow affects the trust that customers place in your brand. That's why regression tests must always include the validation of the entire purchase process, from product selection to payment confirmation.

At seQura we see every day how a simple error in the checkout can block a sale and lose a customer. That's why we stress the importance of making sure that the payment flow always works in an agile, secure and error-free way.

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