During October 2025, John worked on the OpenFUSIONToolkit/JPEC repository, focusing on stabilizing and refactoring the ODE output test suite. He addressed a critical bug by updating tests to reflect new output logic, ensuring that conditional output writing was handled correctly. Using Julia, John refactored the initialization of OdeState and DconOutput within the test infrastructure to accommodate updated constructors, which improved test reliability and reduced the risk of regression. His work emphasized robust bug fixing and comprehensive testing, resulting in more reliable validation for downstream integrations. This effort enhanced the maintainability and accuracy of the project’s testing framework.