During July 2025, Ku focused on enhancing test coverage for the mybatis/mybatis-3 repository by implementing an end-to-end test that verifies the choose-when fallback behavior in MyBatis. Using Java, SQL, and MyBatis, Ku developed a mapper interface, a dedicated test class, and an SQL script to ensure that when no conditions match in a choose statement, the logic correctly falls back to the otherwise clause. This work specifically validated the retrieval of users with ACTIVE status when no parameters are provided. The contribution demonstrated a methodical approach to unit testing and reinforced the reliability of conditional SQL mapping logic.