Worked on stabilizing the Jest UI5 test environment within the SAP/open-ux-tools repository, focusing on reducing continuous integration flakiness and improving test reliability. Addressed a persistent issue in the jest-environment-ui5 package by updating the jsdom dependency to support Jest 30.4.2, ensuring all required test environment files were included, and aligning the performance.now function with UI5 initialization for accurate test timing. Emphasized dependency management and lockfile hygiene using JavaScript and JSON to guarantee reproducible builds. Collaborated closely with team members to deliver a targeted bug fix, resulting in faster feedback cycles and more stable UI5-related test environments in CI.