The GRC Advisory Team has successfully carried out integration tests for SAP HANA migration of SAP GRC and SAP ECC solutions for one of the leaders of telecommunications industry in Poland. The scope of the project, fulfilled after a successful implementation of the SAP GRC solution, included a gradual migration to the SAP HANA platform. In its first phase, detailed integration tests were carried out inside the SAP GRC solution on all systems. Then, after successful results, similar migration tests were performed for SAP ECC also. Due to the specific of the implemented SAP GRC modules, integration tests also involved participants from the Client side. For the tests carried out, detailed documentation has been prepared and provided.