During June 2025, Karl Dubost addressed SVG shape test instability in the mozilla/gecko-dev repository by implementing a targeted bug fix. He introduced metadata tags to control fuzziness levels in pathlength-002.svg and pathlength-003.svg, directly reducing test failures caused by rendering discrepancies. This approach stabilized the SVG tests within the Web Platform Testing suite, leading to more reliable continuous integration results and less flaky test output. Karl’s work involved XML and SVG, leveraging test metadata tagging and collaborative pull request workflows. His documented methodology enables future reuse of fuzziness controls, contributing to ongoing efforts to improve SVG rendering accuracy and test reliability.