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TestMu AI’s Smart RCA eliminates guesswork in visual debugging, quickly pinpointing DOM and CSS changes to accelerate your debugging workflow

Mythili Raju
January 29, 2026
Visual testing has revolutionized how development teams catch visual issues, but there’s been one persistent challenge: knowing what went wrong, not just where. When your visual tests fail, you’re often left playing detective, manually sifting through DOM elements and CSS properties to find the culprit. This is where Smart RCA comes in.
TestMu AI’s SmartUI, an AI-native visual testing tool, now introduces a new feature called Smart RCA (Root Cause Analysis), an intelligent debugging assistant that converts visual test failures into actionable insights. Instead of spending hours investigating why your UI broke, Smart RCA highlights the exact DOM and CSS changes responsible for visual differences.
Smart RCA goes beyond surface-level visual diffs by providing an in-depth inspection of why visual differences occur. It reveals the exact DOM and CSS changes between your baseline and captured screenshots in a clear, visual, and interactive format. This ensures you can debug visually failing tests with speed and confidence.
Key features of Smart RCA:
Note: To get started with Smart RCA, check out our detailed support documentation .
Visual testing traditionally suffers from what we call the “what versus where” problem:
Traditional Visual Testing:
SmartUI Root Cause Analysis:
Here’s an example of how Smart RCA provides a detailed analysis of visual differences and highlights the root cause of the issue.

Smart Root Cause Analysis (RCA) transforms your debugging process by providing precise insights into visual regressions. Here’s how it enhances your workflow:
SmartUI’s Root Cause Analysis transforms visual debugging from guesswork into precise, actionable insights. Instead of spending hours investigating visual failures, RCA shows you exactly what changed and why.
For questions or implementation support, reach out through our in-app chat or email [email protected].
Happy testing!
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