Genesis 43:34 - Five Representing Grace

And he took and sent messes unto them from before him: but Benjamin's mess was five times so much as any of their's. And they drank, and were merry with him.

There is no obligation to obtaining grace; it is totally dependent on the generosity of the grantor (Exodus 33:19). Benjamin obtained grace and favor so that he received five times so much as any of their's. I believe this was no test, because after Joseph made himself known to his brothers, he again favored Benjamin with five times so much (Genesis 45:22).