The artifact used for evaluating the experimental results of \textit{Measuring and Mitigating Gaps in Structural Testing} is publicly \textit{available} on GitHub, Software Heritage and figshare, and is \textit{reusable}. The artifact consists of necessary data, tools, scripts, and detailed documentation for running the experiments and reproducing the results shown in the paper. We have also provided a \textit{VirtualBox VM} image allowing users to quickly setup and reproduce the results. Users are expected to be familiar using the VirtualBox software and Linux platform for evaluating or reusing the artifact.