Test automation is the process of using software tools to perform tests on a software product with minimal human involvement. Instead of manually testing each feature or page of an application, engineers create autotests that are executed automatically and repeatedly.

How automation speeds up product release

Reduce regression testing time

• Manually testing each new version of a product can take hours or even days.
• Autotests run in minutes, allowing you to find bugs faster.

Example: At Spotify, automating regression testing reduced the update release cycle from 2 weeks to a few days.

Parallel execution of tests

• Autotests can be run on dozens of machines or in the cloud in parallel.
• This is especially important with a large number of configurations (different browsers, devices, etc.).

Example: At Booking.com, autotests are run in thousands of environments simultaneously, covering dozens of languages and currencies.

Quick check after each change (CI/CD)

• Integration of autotests into CI/CD (continuous integration/continuous delivery) allows you to immediately check the health of the application after each commit.

Example: In GitLab, every pull request is automatically checked by autotests – bugs are caught early, without reaching the release.

Increased product stability and quality

• Automation allows you not to miss critical bugs that might not have been noticed manually.
• The more stable the product is – the less time is spent on rolling back releases and fixing bugs “in battle”.

Reducing the human factor

• Manual testing is subject to fatigue, errors, and variability.
• A machine runs the same exact test every time.

Which tests automate first

• Regression tests (repeated testing of old functionality);
• Smoke tests (checking that “everything runs”);
• API tests;
• UI-tests (e.g. with Selenium, Cypress);
• Performance-tests (load testing).

When automation doesn’t speed up the release

• When tools or strategies are chosen incorrectly;
• When there is no time to support autotests (they “crash” and interfere with the build);
• When the share of UI tests that are unstable is too high.

Conclusion

Test automation is a key component of fast and reliable software delivery. It allows teams to release updates more frequently, more confidently, and with less manual testing. The key is to have the right automation strategy and maintain it on an ongoing basis.