An information processing system includes one or more information processing apparatuses each of which performs a plurality of programs to implement functions. The system includes a memory to store application information associating flow information and application configuration information for each of one or more applications that performs, when executed, a series of processes using electronic data, and circuitry to receive a request including the application configuration information, generate one or more test cases for testing the series of processes based on parameter information defined in the application configuration information in the request, acquires flow information identified with flow identification defined in the application configuration information in the request and executes, according to an order of executing one or more programs defined in the flow information, the one or more programs each of which is identified with program identification defined in the flow information acquired, to test the series of processes.