During August 2025, Jiaming Cao focused on stabilizing the AheadBTB unit tests within the OpenXiangShan/GEM5 repository, addressing a critical bug related to MBTB integration. He updated the test setup and logic in C++ to ensure that the unit tests accurately reflected the new MBTB-enabled architecture, improving both reliability and maintainability. Leveraging his expertise in branch prediction, CPU architecture, and unit testing, Jiaming’s work laid the technical foundation for future MBTB-enabled validation in GEM5. Although the scope was limited to a single bug fix, the depth of the solution demonstrated careful attention to test correctness and long-term project needs.