Margherita Col worked on the EvolEcolGroup/tidypopgen repository, focusing on enhancing the reliability of data visualization workflows in R. She developed and integrated a targeted test to ensure the autoplot function correctly handles NA values in the MAF column, addressing scenarios where genotype or allele information may be missing. By documenting edge-case behavior and embedding the test into the project’s suite, Margherita strengthened the project’s regression testing and data integrity. Her work leveraged R programming and data analysis skills, with a strong emphasis on robust testing practices, resulting in improved stability for users working with incomplete genetic datasets.