A computer device may include logic configured to provide a centralized library for descriptive programming and other types of object descriptions to a testing script engine. The descriptive programming library may store test object descriptions for test objects associated with an application under testing. The logic may be further configured to provide a unification layer over all the object description types and to provide inheritance among the objects at the unification layer. The logic may be further configured to store a test object description, associated with a test object, in the descriptive programming library; identify a reference to the test object in a descriptive programming statement associated with the testing script engine; access the stored test object description in the descriptive programming library based on the identified reference to the test object; and identify an application object, associated with the application under testing, based on the stored test object description.