Worked on modernizing the test infrastructure for the vespa-engine/vespa repository by migrating core test suites to Google Test, focusing on components such as the query builder, file header, and transaction log client. Leveraged C++, CMake, and gtest to standardize test assertions, consolidate test patterns, and replace ad-hoc exception handling with clearer assertion macros. This approach reduced test fragility and improved the clarity of test outcomes, resulting in faster continuous integration feedback and lower maintenance overhead. The modernization also enhanced onboarding for new contributors by providing a more consistent and maintainable testing framework across critical parts of the codebase.