During August 2025, Xueyuhai focused on enhancing feature-testing capabilities for the Variant Flattening functionality on Nested Tables within the apache/doris repository. By updating Groovy-based test configurations and enabling targeted regression testing, Xueyuhai improved test stability and early feedback for ongoing development. The work involved renaming and activating feature flags, adjusting load.groovy settings, and temporarily commenting out DROP TABLE statements to streamline test runs and reduce noise. Leveraging skills in database and regression testing, Xueyuhai’s contributions provided a more robust framework for validating new features, though the scope was limited to test infrastructure rather than user-facing bug fixes.