My son just passed CDL training at the local Junior College. Their driving test was administered by some sort of approved contractor. Not a State (Oregon) employee nor his instructor(s). He took a form to the DMV to get the actual license.
Other interesting: The class started with about a dozen student drivers. Half failed the drug testing and were never seen again. Several more dropped. Three completed the course.
Interesting. They probably concluded there was no way to fake the drug test.