During July 2025, Solar focused on enhancing the reliability of systemd/systemd’s cgroup test suite by addressing issues related to missing resources in containerized environments. By refining error handling in C, Solar modified test-cgroup and test-cgroup-util to gracefully accept ENOENT and ENXIO errors, which commonly occur when cgroups or resources are unavailable. This approach reduced false negatives in continuous integration testing and improved overall system testing feedback. The work demonstrated a strong understanding of error handling and system testing in C, resulting in more resilient automated tests and contributing to a smoother development workflow for the systemd repository.