Abstract: Systems and methods associated with a self-testing module are described. The module may self control an environmental stress screen (ESS) apparatus and a self-test. One exemplary system includes a substitution test apparatus configured to hold a unit under test (UUT) configured with a self-test logic. The substitution test apparatus facilitates operably connecting the UUT to peripheral computer components so that the UUT and the peripheral components form a computing system when operably connected. The system may include an ESS apparatus for selectively and controllably applying an environmental stress to the UUT, a process control logic for controlling the substitution test apparatus, the UUT, the self-test logic, and/or the ESS apparatus.