A method for testing computing devices includes providing a suite of test programs on a server for execution by a plurality of the computing devices that are coupled to the server. A respective unique identifier is assigned to each of the plurality of the computing devices, for use in communicating with the server. The test programs are downloaded from the server for execution by the computing devices coupled thereto, so that at least first and second computing devices among the plurality execute different first and second test programs from the suite substantially simultaneously. The server receives messages from the computing devices with respect to execution of the test programs, each of the messages containing the respective unique identifier, and controls the execution of the test programs in the suite based on the messages.