To obtain a device and method for testing ICs capable of executing IC tests in an optimal test sequence so as to shorten the execution time of all IC test items in the case of performing a plurality of IC tests and a storage medium in which a program for executing the IC tests is stored.

The control device 20 of the IC testing device 1 performs a test time shortening processing by reading a test program 50 stored in an auxiliary storage device 10 and inputting the test program 50 to a time shortening device 22 in the control device 20 and stores it in a main storage device 21 in the control device 20. In the test time shortening processing, the time shortening device 22 performs the processing of interchanging the execution sequence of test items of the test program 50 so that an average execution time on conforming items may become in ascending order on the basis of both test execution time set in advance corresponding to each test described in the test program 50 and the probability of occurrence of defective units.