I think this is a good idea honestly. Not as a test, because then it won't work (from what I read in the Scriptures). Just go to the hospital and heal people out of love in the name of Christ. The Bible makes it clear that those who walk with Christ will be able to do miraculous things through prayer.
My wife had stage 3 ovarian cancer, I did pray for her to be healed, but I don't know if God answered that or not to be honest. She was afraid to get it taken care of and put if off for a couple years. When she finally went back in to see how far it progressed, they said it was completely gone. I guess I thought that if God truly did heal her, that I would actually know that it was Him or not. Plus, I prayed it in private, I guess part of me feels like I should have done it out loud in front of her to be answered. Like an act of faith instead of wishful thinking behind closed doors. But these are all just fleshly thoughts not really based off of Scripture.
I have always felt like the church and the Christians I have known have a form of godliness but deny its true power. They just run around, living by the worlds rules, bound by their worldly reality as if God was not powerful, as if He didn't say all the things He really said (He said some crazy, supernatural stuff lol). They "just try to get by" instead of walking boldly in faith. I always intended to be different, I always wanted to be the Christian that I always wanted to be able to look up to, a true man of God whose faith was not swayed by anything. Who understood that reality is not just what we see with our eyes. Who did not check his bank account to figure out whether or not he could just "go" and start doing the work of the Lord. In Acts, the early Christian would simply sell all their possessions and their properties and give as was needed. Try finding a Christian in America who has such faith. I still intend to get to that point with Gods help. It just became more difficult to figure out once I had children