UML modeling is proposed to document complex testbenches, but it has limitations for representing aspect-oriented languages like e. Specifically, UML was designed for object-oriented systems while e uses units and structs, and e allows for richer extensions than AspectJ which UML tools support. While UML could represent portions of an e testbench, it does not fully capture e's aspect-oriented features or constraints. Therefore, UML may not be the best solution for comprehensive documentation of e testbenches.