No.
Testing prophets - who claim to speak for God, or for other gods - is to wait and seeing what they say will happen actually happens. If it does, then that was a prophecy. If it doesn't, it isn't/wasn't.
There were kings who would keep lots of prophets on retainers, all saying things the king wanted to hear. And other prophets who were saying things more along the lines of God isn't particularly happy with what you're doing and he isn't going to give you victory in this battle. Test the prophets by checking the outcome. There were defeats - those prophesying victory and claiming to hear gods word without actually hearing it were false prophets. Unlike the real prophets who were saying inconvenient things (and being put to death for saying them), which unfortunately for the king turned out to be true.
Asking my God to read out information you've got in a card under the table - that would be putting him to the test. Something which not even Jesus was willing to do, when the devil suggested giving it a try. I'm not going to ask God to do that.
People have asked for miracles for centuries. Sometimes they haven't received them. Sometimes they have. And sometimes, even when they have, people have decided it can't possibly be the case that this has happened.
When I'm praying for healing, I'm asking God in his mercy to step in and change something. Not to prove that he exists, but to make something better. And at the same time, I'm praying for his will to be done in whatever situation I might be praying about. Mostly these days I look at the world around me and all I can pray is Come, Lord Jesus. I can't see any other way to fix this massive stinking mess we've gotten ourselves into.
So I'll pray - with others - for healing. But it's also ok if he chooses not to. Case in point, a few months ago in church, three different members of the congregation all had different bible verses come to mind when they were praying before the service started. They told the minister, who read out the three verses, along with a message from a fourth person saying they felt God was speaking to someone with a very specific pain in their body.
all three verses we're directly relevant to a specific situation in my life, and I had that specific pain in my body as well (say a stiff neck, although it wasn't - apologies but I try to avoid being too specific online). I went forwards to be prayed for, thinking this meant God wanted to heal my injury.
He didn't. Was I wrong to think he might? No. Was he wrong not to? No. Was it a waste of time going forwards for prayer? No - whilst I wasn't healed, the prayer strengthened me against a difficult week ahead. And that probably sounds very wishy washy and irritating, and I'm sorry for that. Actual bodily healing isn't something I've experienced in my own body. But it is something I've witnessed in others.
Would I seek healing through prayer and not get medical attention? Of course not! We live in the UK, we have access to a fantastic healthcare system, and we have amazing doctors and frontline care of all kinds.
I don't question God's power because I see it everywhere. In the beauty of creation (and no, I'm not s 7 day creationist; whilst I think God could have done it that way, I think evolution is far more beautiful and complex and vast. In the stories I hear of lives transformed. In the changes I see in people's lives. In the addict able to walk away from their habit. In the gentleness with which Hod picks me up, every time I fall into my own particular besetting sin. In the weaving of people's stories around the world and locally.
It's not about not wanting to test God'scwrath because I don't want to be disappointed when I don't experience it. It's because I know God's love, and I try hard not to do anything to disappoint it.