A functional test execution engine (“FTEE”) may be configured to execute test scripts with respect to a server stack. The FTEE may be communicatively coupled to a test script storage device, which may store the test scripts. The FTEE may select one or more test scripts for execution with respect to the server stack. The one or more test scripts may carry out maintenance or diagnostic functions for the server stack. The FTEE may determine the processing resources of the server stack and, based on those processing resources, select a first set of test scripts from the one or more test scripts to execute. The FTEE may cause the first set of test scripts selected to execute with respect to the server stack in order to generate test script results. The FTEE may store the test script results for subsequent analysis and use during execution of subsequent test scripts.