Electrical devices may be tested using test equipment. A device may have an associated cable with a connector. The test equipment may have an associated cable with a connector. An adapter may have a pair of connectors. One of the adapter connectors may be connected to the connector of the cable associated with the device and the other of the adapter connectors may be connected to the connector of the cable that is associated with the tester. A retention clip may be attached to a groove in the adapter. Flexible members in the clip may each grasp an opposing side of the adapter within the groove. A retention member in the clip may bear against the connector on the cable that is associated with the device to hold the connectors for the device cable and the adapter together.