# Regression Testing

## Ship changes without wondering what you broke

Applitools compares every release against your last known-good baseline with Visual AI. When something breaks, you get a reproducible bug to fix, not a coin flip to debug.

## Catch what changed

Compare every release against your last baseline. Applitools flags the pixels a user would actually notice, not every rendering quirk that showed up in the diff.

## Trust the result

The same screenshot always passes or always fails. A red build means a real regression, not something you re-run and hope goes away.

## Update baselines in one click

When a change is intentional, group every test it affects across browsers and devices, and approve the new baseline once.

## How Visual AI catches regressions your test suite doesn't

## Catch bugs your functional tests can't see

**Compare what renders, not just what runs** A test can pass every assertion and still ship a broken layout. Visual AI checks the actual page against your baseline, not just the code path that ran.

**Cover every browser and device automatically** The Ultrafast Grid runs your regression suite across hundreds of browser and device combinations in parallel without a local device lab to maintain.

## Know in seconds if it's a bug or a change

**See the exact change** Root Cause Analysis shows the exact DOM and CSS change behind every diff, so you know in seconds whether it's a real regression or an intentional update.

**Trust every red build** The same screenshot always passes or always fails. A failure is a real bug you can trace, not something to explain away with a re-run.

## Run regression checks in the pipeline you already have

**Run in your existing pipeline** SDKs integrate directly with Playwright, Cypress, Selenium, and Appium, so regression checks run in the same CI job as everything else.

**Test components before they reach a page** Catch a regression in Storybook or Figma at the component level, before it ships anywhere a user can see it.

## Cut regression maintenance down to one click

**Auto-maintenance for intentional changes** Group every test affected by a real UI update and approve the new baseline once, across every browser and device it touched.

**Locator-free execution** Elements are found by visual and semantic clues, so a class name change during a refactor doesn't take down the whole suite.

## Regression testing has never been more powerful using Visual AI

# 1

## Broad regression coverage

Extend the same suite across web, mobile, and PDF documents, so a UI change doesn't slip through in a channel you didn't think to check.

# 2

## Dynamic content handling

Choose the AI match level that works for you to control what counts as a regression, and let Applitools automatically ignore dynamic data like timestamps, session IDs, and A/B content instead of flagging it as a failure.

# 3

## Cross-browser and -device coverage

The Ultrafast Grid and Native Mobile Grid render the same test across every browser and device in parallel, without a local grid to maintain.

# 4

## Deterministic Language Model

The same input always produces the same output, so a result is something you can explain and trust, not a probability.

# 5

## Human-eye simulation

Visual AI ignores rendering noise like anti-aliasing and sub-pixel shifts, and flags only the changes a real user would notice.

# 6

## No-code and code authoring

Write regression checks in plain English, record a flow, or write code directly, so QA, design, and engineering can all add coverage.

## Ready for the next generation of testing?