Agile Knowledge Graph Testing with TESTaLOD

XD is an agile methodology for knowledge graph construction focused on the continuous and iterative interaction between the development team and the testing team. This interaction is aimed at formally validating the resulting knowledge graphs with respect to clear ontological commitments identified as competency questions. In this paper we present and demonstrate TESTaLOD, which is a tool designed and implemented for supporting the testing team of XD projects with an easy-to-use web-based toolbox.