Ajoke Yusuf enhanced the test coverage for the CompoundIdentifier module in the ersilia-os/ersilia repository, focusing on improving reliability in chemical data parsing. She developed targeted unit tests in Python using PyTest, specifically addressing edge cases such as SMILES handling when the Chem library is unavailable and the logic for InChIKey-based type guessing. By concentrating on these scenarios, her work reduced the risk of misclassification and improved the robustness of downstream data pipelines. This effort did not introduce new features but strengthened data integrity and analytics readiness, demonstrating depth in testing, chemical informatics concepts, and continuous integration practices.