A testing system includes a client library that functions as a proxy for remote procedure calls to allow commands to be issued directly from a test framework including an interface that enables remote procedure call commands to be sent to a device under test from a mobile device and responses from the device under test to be received and forwarded to the mobile device, even where the mobile device and device under test have different operating systems. A client program adapted to run on the device under test sends and receives remote procedure call commands from the device under test to and from a test server that implements the test framework and manages a device state of the device under test. In a pairing test, the remote procedure call commands include commands adapted to emulate a button press for initiating pairing between the mobile device and the device under test.