To measure the performance of our internal coordinate saddle point optimization algorithm, we have created a benchmark test set consisting of 500 molecular geometries generated by KinBot. This test set consists of small organic molecules with between 7 and 25 atoms in configurations that approximate saddle points for a set of reaction families. Each molecular geometry in the test set was optimized to a saddle point structure in a basis of internal coordinates which were determined automatically by Sella. Calculations were performed with NWChem at the Hartree-Fock level of theory with the 3-21G basis. Open-shell molecules were calculated at the unrestricted Hartree-Fock level of theory instead. This level of theory was chosen for computational expedience and to ensure broad compatibility with the widest range of molecular electronic structure theory packages possible. The molecular geometry optimization was considered converged once the maximum atomic force in Cartesian coordinates dropped below 0.01 eV Å -1 (see appendix B). The initial molecular geometries and a Python script for performing the optimizations are available in the supplementary material.