Banji Olaniyan focused on enhancing the test suite for the optuna/optuna repository by refactoring the test_hyperband.py module. Using Python and leveraging modern testing practices, Banji replaced legacy string formatting with f-strings, which improved both code readability and execution performance. This targeted update addressed maintainability concerns and aligned the test code with current Python standards, making it easier for future contributors to onboard and reducing potential technical debt. Although no major bugs were fixed during this period, Banji’s work contributed to more reliable and efficient test execution, supporting the repository’s ongoing efforts to streamline release cycles and quality assurance.