Abstract: A device for automatically presenting electronic devices to a tester for testing. A plurality of carriers, each for carrying a set of electronic devices are cyclically conveyed in a close loop from a loading stage where electronic devices are loaded onto the carriers, through a pre-test chamber, such as a "soak" chamber, from the pre-test chamber to a test stage where the devices are preferably lifted from the carrier to come into contact with a test head contactor for testing, from the test stage to a post-test chamber, such as "un-soak" chamber, through the post-test chamber to an unloading stage where the carriers are unloaded of the tested electronic devices, and then from the unloading stage back to the loading stage to receive a new set of untested electronic devices. Optionally, each carrier comprises a set of secondary carriers which ride in a like number of seats defined by a primary carrier and sets of electronic devices are loaded onto and unloaded from the secondary carriers.