Many of the heroes in the Old Testament tested God. And He tested them. We have no need to test God, He has already answered with Christ.

Judges 6:36-40

Then Gideon said to God, “If you will save Israel by my hand, as you have said,

behold, I am laying a fleece of wool on the threshing floor. If there is dew on the fleece

alone, and it is dry on all the ground, then I shall know that you will save Israel by my hand, as you have said.”

And it was so. When he rose early next morning and squeezed the fleece, he wrung enough dew from the fleece to fill a bowl with water.

Then Gideon said to God, “Let not your anger

burn against me; let me speak just once more. Please let me test just once more with the fleece. Please let it be dry on the fleece only,

and on all the ground let there be dew.”

And God did so that night; and it was dry on the fleece only, and on all the ground there was dew.

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