When testing any product, one of the most important tasks is to evaluate the functionality coverage by the tests. It gives an idea of which areas have been tested and which need to be given more attention. With the addition of new functionality and with the change of the existing one, the need for this assessment increases. The presented report describes the experience of creating a system for obtaining an evaluation of the autotest of a large product (CAD KOMPAS-3D). Particular attention is paid to the description of the creation of this system and all the nuances in its creation.