"I can stop whenever I want. I just don't want to."
Cool. Then stop. For 30 days. Starting now. No tapering, no substitutes, no "just this once." Complete abstinence for one month.
If it's easy, you're probably fine. If it's uncomfortable but doable, worth paying attention to. If you can't make it, or if you find yourself making exceptions by day 8, that's telling you something important.
The test isn't about willpower. It's about dependency. Your brain has adapted to the presence of this substance and now needs it to feel normal. That's not a character flaw. It's neuroadaptation.
Most people who say "I can stop whenever I want" have never actually tested it. Because they're afraid of what the test would show.
Run the test. If you pass, great. If you don't, now you know something important.