Visual Regression Testing

Visual regression catches unintended layout and styling changes that functional assertions miss.

How it runs

A test step can assert a screenshot against a stored reference. When the run executes, AegisRunner captures the current screenshot, compares it pixel-by-pixel, and records the match percentage and a diff against that step. If the difference exceeds the threshold, the step fails — open it in the Runs lens to see the captured image.

Page-level baselines

For whole-page regression across a site, use Manage → Regression to snapshot a scan as a baseline and replay it — see Regression Baselines.