Visual regression testing for websites
A normal automated test checks whether a button works. Visual regression testing helps check whether the button, form or component is still in the right place and readable.
When it is useful
Playwright supports screenshot comparisons that can find unexpected visual changes. This is useful when pages have many components or several breakpoints.
Visual testing helps when:
- design changes often;
- the site must work on mobile and desktop;
- components come from several systems;
- previous releases caused layout defects;
- accessibility depends on visible focus and readable text.
What not to over-test
Not every page needs to be locked with screenshots. It is better to start with critical journeys: front page, form, cart, service page and one content page.
WebPro uses visual checks as part of automated testing when they actually reduce release risk. In Drupal projects, this fits well with maintenance and larger upgrades.
Kaido Toomingas
WebPro Company OÜ
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