Vladimir Jovanovic enhanced the test infrastructure for the tenstorrent/tt-xla repository by aligning code ownership for tests and continuous integration. He updated the CODEOWNERS file using YAML to designate a new team member responsible for test and CI components, supporting ongoing DevOps initiatives. This change clarified maintenance responsibilities, improved review coverage, and streamlined onboarding for new contributors. By focusing on code ownership management, Vladimir helped ensure that test infrastructure received proper attention, which contributed to more reliable CI results and better collaboration across the team. The work demonstrated a targeted approach to process improvement within a short, focused development period.