The example apparatus for testing an ultrasonic gas leak detection device includes a button configurable between an un-depressed state and a depressed state and an ultrasonic transduction device. The ultrasonic transduction device is configured to generate a first ultrasonic signal for testing the ultrasonic gas leak detection device in response to a first determination that the apparatus is in a first testing mode and that the button simultaneously corresponds to the depressed state, and generate a second ultrasonic signal for testing the ultrasonic gas leak detection device in response to a second determination that the apparatus is in a second testing mode and that the button simultaneously corresponds to the depressed state, wherein the second ultrasonic signal is different from the first ultrasonic signal.