Abstract: A resonant test probe for testing high-speed integrated circuit devices. The test probe includes a probe tip that makes electrical contact with a device under test to receive a test signal from the device, and an output circuit transmits the received test signal to a testing apparatus. The test probe also includes tuning circuitry coupled between the probe tip and the output circuit. The tuning circuitry is configured to tune a resonance frequency of the test probe to be substantially equal to an operating frequency of the device under test to enable the test probe to transmit the test signal to the device under test.