During June 2025, Karl Dubost enhanced SVG rendering test reliability in the mozilla/gecko-dev repository by implementing fuzziness tolerance for rounded rectangle comparisons. He addressed a persistent issue where minor pixel differences caused flaky automated test failures, introducing logic that allowed for small variances in test results. This adjustment improved continuous integration stability and accelerated feedback cycles. Karl utilized XML for test definitions and applied his expertise in SVG and Web Platform Testing to refine the automation process. His targeted bug fix demonstrated a thoughtful approach to test maintenance, focusing on precise change-tracking and robust WPT workflows to strengthen overall test coverage.