Renaud Jougla contributed to the hydrologie/xhydro repository by focusing on improving the quality and maintainability of the test suite. During December 2025, he delivered a targeted cleanup in the test_regional.py file, specifically removing an unnecessary comment to enhance code readability without altering any test functionality. This work emphasized the importance of test hygiene and maintainable code, supporting easier onboarding for new contributors and laying a stronger foundation for reliable test execution. Renaud applied his skills in Python, testing, and Git-based version control, demonstrating a methodical approach to quality assurance and incremental improvement within the project’s codebase.