A method and apparatus for simultaneously testing multiple set-top boxes uses a test equipment structure or frame for receiving a known good set-top box and a plurality of set-top boxes to be tested against a known good set-top box. A movable shelf structure is provided for electrically connecting at least each set-top box to be tested by a single sliding motion. Connectors on a backplane are made moveable to adjust for slight variations in the position of the connectors on the set-top boxes. An infrared control system generates an infrared signal to transmit to each set-top box and other related equipment in the testing operation such as televisions and receivers such that the function of each set-top box and related equipment is the same at each instant. Analyzing equipment is provided to analyze at least the audio output of each set-top box being tested at a selected channel and compared to the audio output of the known good set-top box. The equipment may also include equipment for analyzing and comparing the video outputs. The test results are displayed for each set-top box being tested.