Test automation: More quality and speed for your software

In the agile software development, in which new versions are published in the weekly or even daily, manual testing is a bottleneck. It is slow, susceptible to errors and extremely costly in the long term. The solution for this problem is Test Automation – the practice of automatically running tests using software tools.

This article explains why test automation is indispensable for modern development processes, introduces the most important types of automated tests and shows the advantages that go far beyond the pure error finding.

This article is part of our complete guide: [The ultimate guide to software development 2026](link to capillary page).

Why Test Automation?

Short: Executive answer: Discover the advantages of testing automation for your software development.

Executive answer: Discover the advantages of testing automation for your software development.

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Manual testing is repetitive and tiresome. A human tester cannot click through the entire application again at any small code update.

Automated tests, on the other hand, can do this in a few minutes – and that for every single comit.

The main advantages are:

• ** Speed:** Automated tests run several times faster than manual tests. They give developers immediate feedback whether their changes have caused errors.

** Automated tests are consistent and reliable. They do not forget test cases and are not tired.

• Cost efficiency: Although the creation of automated tests requires an initial investment, they save enormous costs in the long term, as manual test expenses are drastically reduced.

• Freight error detection: Errors are found early in development process (as part of CI/CD pipeline), if they are still easy and inexpensive to fix.

• Safety for Refactoring: Developers can boldly improve and modernize existing code (refactoring), as automated tests give them the assurance that they do not destroy existing functions.

The test pyramid: What tests should you automate?

Short: Not every test is equally suitable for automation.

Not every test is equally suitable for automation. The Testpyramide is a proven model that describes a meaningful distribution of automated tests:

1st Unit Test (The Base)

• What they test: The smallest isolated unit of the code, typically a single function or method.

• ** Properties:** They are extremely fast, easy to write and form the broad foundation of the pyramid. You should make up most of your test suite.

• Example: A test that checks whether a function add(2, 3) correctly returns the result 5.

2. Integration tests (the middle)

• What they test: The interaction of two or more components (units). You make sure that the different parts of your An

References and further reading

Short: The following independent references complement the topics in this article:

The following independent references complement the topics in this article:

• Bitkom – German digital industry association
• German Federal Office for Information Security (BSI)
• European Commission – Digital strategy
• MDN Web Docs (Mozilla)
• W3C – World Wide Web Consortium

> "ERP programmes rarely fail on software selection; they fail on unclear process ownership."

— Björn Groenewold, Managing Director, Groenewold IT Solutions

Frequently Asked Questions (FAQ)

What is this article about: “Test automation: More quality and speed for your software”?

Here we cover Test automation: More quality and speed for your software — focused on architecture, process, and business outcomes. In short: Discover the advantages of testing automation for your software development.

Learn more about unit, integration and end-to-end tests and the test pyramids.

Who benefits most from the content described here?

Typical readers are business and IT leaders in Software development who want to secure quality, security, and maintainability over the long term.

How does this topic fit into an IT or digital strategy?

In a digital strategy, prioritize stable core processes first, then extensions. See also professional software development and consulting. For multi-system landscapes, IT consulting and architecture helps align vendors and internal teams.

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