In a test automation method and test system for a user end apparatus that can be communicatively connected with a test automation apparatus, at least one data processing unit and a non-volatile memory for storage of a test workflow program as well as a first external interface and a second external interface are provided. The user end apparatus has at least one control unit, a non-volatile memory and an external interface. The user end apparatus is protected by a security housing and has an external interface that can be placed in communication with the special second external interface of the test automation apparatus. By loading release software, the user end apparatus is programmed to generate test output signals and to supply these to the external interface. The data processing unit of the test automation apparatus is programmed via the test workflow program for execution of at least one routine for at least one test case and is connected with the special interface via which the test input signals (simulated in the test case) are transmitted to the internal interface of the user end apparatus.