An interface circuit is connected to an ATE via a test control bus BUS3 that differs from main buses, receives a control signal output from the ATE, and controls multiple BIST circuits according to the control signal. Furthermore, a DUT is configured such that a test result signal specified by the control signal can be read by the ATE via the test control bus. A BISI synchronous control unit generates a first control signal for individually controlling the multiple BIST circuits included in the DUT, and a second control signal for reading the test result signal generated by the BIST circuit, and supplies these signals to the DUT via the test control bus.