The present invention may be a method, a system, and/or a computer program product. An embodiment of the present invention provides a computer-implemented method for associating one or more test cases with one or more source code parts for a test target, or vice versa. The method comprises the followings: obtaining one or more historical data in which one or more modification histories made in one or more source codes are associated with one or more test operation histories made in the test target after the one or more modifications; for each of the historical data, determining whether the test operation history has one or more parts which are identical or similar with those in one or more test cases; and if the determination is positive, associating the one or more test cases with one or more source code parts in the one or more modification histories which have been associated with the test operation history, or vice versa.