What are the tests used to diagnose upper motor neuron disorders?

Clinical is the best. You've just stated a few hundred different disease processes that involve "UMN disorders." Which one did you have in mind? The best way to a diagnosis is a well trained neurologist who likes to examine their patients, judiciously use tests to help support their clinical thinking or help reorient them if necessary and not make snap decisions. Do you know anybody like that? That's who needs to see U.