The disclosed deployment testing system includes a test loader that loads and parses test objects and the antecedent test objects on which the selected test object depends, to prepare a test sequence. A database of test objects apply to one or more SUT and specify aspects of deployed SUT configuration that include hardware configuration, active connection of the SUT to other network devices, configuration of the actively connected network devices to accept access by the SUT, presence of files and applications in storage, and services running on the SUT; identify dependencies on antecedent test objects; specify test object features that extend object features found in the antecedent test objects; and override test parameter values in the antecedent test objects. A test executor obtains administrative credentials for accessing and testing a SUT and uses the test and antecedent test objects to verify the SUT; and a test reporter publishes tester results.