March 2025 monthly summary for apache/paimon focused on delivering scalable test infrastructure for REST Catalog. Key feature delivered: REST Catalog Testing Infrastructure Base Class to centralize common testing logic, enabling substantial code reuse and reducing redundancy. Completed refactor of existing RESTCatalog tests to inherit from the new base class, with abstract methods to guide concrete implementations and ensure consistency. This work lays the foundation for more robust, maintainable automated testing and faster onboarding for new contributors. No major bugs fixed this month in this repository. Overall impact: improved test reliability, lower maintenance costs, and faster iteration cycles for REST Catalog components. Technologies/skills demonstrated: test infrastructure design, refactoring, OO design with base classes and abstract methods, and emphasis on code reuse and maintainability.