A memory includes: an input circuit, configured to: receive an outside clock signal, and output a first test clock signal; a test path selection circuit, connected to the input circuit, and configured to output a second test clock signal according to a read clock command; and an output circuit, connected to the test path selection circuit, and configured to convert the second test clock signal into a third test clock signal and output the third test clock signal to outside of the memory. In the embodiments of the disclosure, a time delay of inputting a clock signal into each chip under test is quantified, to acquire an actual output delay of the chip, thereby improving the accuracy of parallel tests of a plurality of chips.