Worked on the etcd-io/etcd repository to address shell script compatibility issues by delivering a targeted bug fix that improved test script reliability. Focused on refining shell scripting practices, the developer removed an unnecessary x-prefix in string comparisons within test_lib.sh, aligning the code with ShellCheck SC2268 recommendations. This adjustment reduced shell warnings and enhanced cross-shell portability, contributing to more stable continuous integration workflows. The work was implemented using shell scripting and involved careful attention to modern shell standards. The changes maintained a clean commit history with clear rationale, supporting maintainability and ongoing test infrastructure improvements without introducing new features.