A system for testing of wireless power transfer equipment comprising a plurality of wireless power transmitters (22a-n) adapted for concurrent wireless power transfer to respective wireless power receiver devices (10a, 10a', 10d), the system comprising: a master test device having a local data communication interface, a master controller, and an output unit; and a number of slave test devices (30a-n), each slave test device having: a local data communication interface (38a-n) being adapted for data communication with the master test device, a wireless power receiver (32a-n), and a local controller (37a-n) configured for performing a wireless power transfer test procedure (120a-n) upon any of the wireless power transmitters (22a-n) of the wireless power transfer equipment under test; wherein the master test device is configured to communicate via its local data communication interface with the slave test devices (30a-n); and wherein the master controller of the master test device is configured to: command (110a-n) the slave test devices (30a-n) to perform their respective test procedures (120a-n) upon respective ones of the wireless power transmitters (22a-n) of the wireless power transfer equipment while being in concurrent operation under test, receive (140a-n) result data (125a-n) from the respective test procedures (120a-n) performed by the slave test devices (30a-n), and provide an output by the output unit of the master test device, the output being based on the respective result data (125a-n) obtained from the slave test devices (30a-n). a master test device having a local data communication interface, a master controller, and an output unit; and a local data communication interface, a master controller, and an output unit; and a number of slave test devices (30a-n), each slave test device having: a local data communication interface (38a-n) being adapted for data communication with the master test device, a wireless power receiver (32a-n), and a local controller (37a-n) configured for performing a wireless power transfer test procedure (120a-n) upon any of the wireless power transmitters (22a-n) of the wireless power transfer equipment under test; a local data communication interface (38a-n) being adapted for data communication with the master test device, a wireless power receiver (32a-n), and a local controller (37a-n) configured for performing a wireless power transfer test procedure (120a-n) upon any of the wireless power transmitters (22a-n) of the wireless power transfer equipment under test; wherein the master test device is configured to communicate via its local data communication interface with the slave test devices (30a-n); and wherein the master controller of the master test device is configured to: command (110a-n) the slave test devices (30a-n) to perform their respective test procedures (120a-n) upon respective ones of the wireless power transmitters (22a-n) of the wireless power transfer equipment while being in concurrent operation under test, receive (140a-n) result data (125a-n) from the respective test procedures (120a-n) performed by the slave test devices (30a-n), and provide an output by the output unit of the master test device, the output being based on the respective result data (125a-n) obtained from the slave test devices (30a-n). command (110a-n) the slave test devices (30a-n) to perform their respective test procedures (120a-n) upon respective ones of the wireless power transmitters (22a-n) of the wireless power transfer equipment while being in concurrent operation under test, receive (140a-n) result data (125a-n) from the respective test procedures (120a-n) performed by the slave test devices (30a-n), and provide an output by the output unit of the master test device, the output being based on the respective result data (125a-n) obtained from the slave test devices (30a-n).