The Monte Carlo event generator Sherpa enables the simulation of high-energy particle collisions, like the ones recorded by the ATLAS detector at the Large Hadron Collider. One of Sherpa’s features is its compatibility with models formulated in the Universal FeynRules Output (UFO) format. These UFO models make simulations based on physics beyond the Standard Model possible. Presented here are the results of validation tests performed using two seperate UFO models: Sherpa’s use of the SMEFTsim model was tested in the context of a Vector Boson Scattering process, and the inclusion of the HHVBF_UFO model was tested using a process involving a triple Higgs coupling. The tests are based on consistency within Sherpa, as well as comparisons with events generated with the MadGraph5_aMC@NLO event generator.