An aspect includes displaying a list of test case functions via a user interface. Each of the test case functions includes a corresponding set of instructions that is extracted from a development application, and each of the test case functions is configured to execute an atomic action with respect to a test case. The set of instructions is transparent to a user of the user interface. An aspect further includes receiving, via the user interface, a user-inputted selection of the test case functions from the list. For each test function of the selected test case functions, an aspect includes displaying, via the user interface, a field for receiving a device identifier for a device subject to the test case; receiving, via the user interface, a user-inputted device identifier; assembling the test case from the selected test case functions and the device identifier; and executing the test case for the device.