Worked on the TileDB-Inc/TileDB repository to improve continuous integration reliability by addressing a persistent CI failure in the nightly ASAN suite. Focused on test hygiene, the developer identified and removed a C API subarray unit test that was unachievable due to an out-of-bounds memcpy causing segmentation faults rather than the expected error code. This targeted change did not alter core functionality or API behavior but resulted in more stable nightly builds and faster feedback for contributors. The work involved C++ and API testing, with an emphasis on unit testing practices to streamline maintenance and reduce flaky failures in the CI pipeline.