Worked on improving SVG rendering test reliability in the mozilla/gecko-dev repository by implementing fuzziness tolerance for rounded rectangle tests. Addressed a recurring issue where minor pixel differences caused flaky failures in automated comparisons, which slowed down continuous integration feedback. The solution involved updating Web Platform Testing workflows to allow for small rendering variances, thereby reducing false negatives and enhancing CI stability. Utilized XML for test definitions and applied expertise in SVG and web platform testing to deliver a targeted bug fix. This work contributed to more robust automated test coverage and streamlined the development process for SVG rendering features.