1. A non-transitory computer-readable recording medium having stored therein a test program that causes a computer to execute a process comprising: starting a test of a test-target program containing a plurality of modules by executing a plurality of individual tests, the plurality of individual tests being associated with the plurality of modules, respectively; generating test-relationships information that includes relationships between the plurality of individual tests based on module-relationships information including relationships of the plurality of modules; and in cases in which results of the plurality of individual tests include one or a plurality of specific results fulfilling a specific condition, specifying one or a plurality of additionally executing tests based on the one or plurality of specific results and the test-relationships information.