Worked on the microsoft/vscode-python repository to enhance the reliability of Pytest execution within the extension. Focused on debugging and testing workflows, the developer refactored the Pytest execution logic in Python to prevent double execution when exceptions occurred, addressing a source of flaky test results and CI instability. By removing redundant exception handling around the main Pytest call, the changes enabled more effective use of Python’s debugger during test runs and simplified the codebase for future maintenance. This targeted bug fix improved test predictability, reduced CI noise, and accelerated feedback loops, contributing to a more maintainable and robust testing environment.