During December 2025, Lopin focused on improving test suite reliability for the Homebrew/brew repository by addressing issues with child process termination during test cleanup. He resolved conflicts caused by the proctools package by updating the test harness to use system binaries for pgrep and pkill, ensuring proper signal handling and safer process management. Working primarily with Ruby scripting and system administration, Lopin contributed two targeted commits that reduced CI flakiness and improved maintainability across environments. His work demonstrated a thoughtful approach to process management and testing, resulting in more robust and predictable test execution for the Homebrew/brew project.