In my case testing was a big ordeal. My truck & trailer are old. I know they go over your equipment with a fine tooth comb. I opted to work a deal with an owner with newer equipment.
You have to have a licenced CDL driver accompany you to the test 22 miles from my home, 30 miles from his.
They failed me on my first pre trip inspection. I didn't check landing gear, fifth wheel or headboard on the trailer. I pointed out the trailer didn't have those items. I failed to check mirrors, or windshield. I argued I just drove it to Rutland. They were fine then.
Next round: I had been told in state drivers didn't need a medical card. When I arrived to test they wanted my medical card. "You told me I didn't need one." He replied: "The law is changing in a few months. We're enforcing them early."
Another wasted trip.
I got a medical card, made another appointment. On the appointed day he informed me he had no record of me having an appointment. Wasted trip three!
Last appointment: my accompanying driver, truck & trailer backed out on me. With a weeks notice, I spent $2000. on my truck, and recruited a retired trucker who was still licensed, but sold his truck. I spent two hours on pre trip inspection. Used the State provided check list, checking off each item. The test guy was trying to hurry me through it. I informed him safety was important. I DID make the point the trailer wasn't equipped with headboard, landing gear. He argued my truck was available with hydraulic brakes. It should have both electric horn, and air horn. He did let it slide that I had only an air horn.
It is a big ordeal to test. Vermont opposes you all the way. To retest each time you buy a different truck is frustrating.