We are already doing this test. Haven't you noticed that the older people get and the closer to death, the more likely they are to turn to God?
Several years ago I was deathly ill and the doctors had no idea what was wrong with me. For several weeks no one knew whether I was going to live or die.
God never crossed my mind. I can't begin to imagine how you think I would find it comforting to suddenly pin my hopes on your god, Marduk, the FSM, an IPU, Russell's Teapot, or anything else I don't actually believe in.