Loic Esteve focused on enhancing the CI stability of the piotrplenik/pandas repository by streamlining Windows wheel testing workflows. He addressed test reliability by removing a script that previously installed nightly builds of NumPy, ensuring that all tests consistently used stable, released versions. This change reduced the complexity and potential flakiness of the CI process, leading to more reproducible and dependable test outcomes for Windows builds. Loic applied his expertise in build automation and CI/CD, leveraging shell scripting to implement these improvements. The work demonstrated a targeted approach to infrastructure reliability, though it involved a single feature change over the month.