Worked on quality assurance and documentation enhancements for the pmgbergen/porepy repository, focusing on improving the accuracy and maintainability of test validation processes. Addressed a key bug by consolidating documentation corrections and clarifying the sources of manufactured solutions, which improved traceability and eased onboarding for new contributors. Refined test validation thresholds by tightening the relative tolerance from 50% to 5%, resulting in more deterministic and reliable continuous integration outcomes. Updated test documentation and summaries to reflect the current validation approach, aligning both documentation and tests across the repository. Utilized Python, numerical analysis, and technical writing to support these improvements.