Why Will Prophets Go To Jannah?
Their test was not of faith in the unseen but their test was very difficult as we read in the Quran and the Bible. They faced great hardships, fear and enmity, which shook them too hard. We read the Yunus the prophet once lost his patience and left his people before God commanded him and he was punished for this and imprisoned in the belly of a fish. Their punishment was lurking on them if they commit a mistake in their duties. They were warned that God will cut their jugular vein if they fabricate anything in His name. Or if they feel inclined to the the infidels they will taste a sever scourge from God. The prophets had to be very responsible and cautious in their duties. So their passed their test to enter paradise for their unique kind of hard work.