Worked on improving test robustness for the ecmwf/eckit repository, focusing on ensuring consistent behavior across different hardware architectures such as aarch64. Addressed a persistent issue with flaky continuous integration by replacing strict string equality checks in test utilities with architecture-agnostic comparison logic. This approach eliminated architecture-specific test failures, resulting in more reliable and faster feedback from CI pipelines. Utilized C++ for both development and testing, maintaining code quality while enhancing cross-architecture correctness. The work contributed to greater software reliability, allowing downstream users to depend on stable test outcomes regardless of the underlying hardware environment or platform.