The Maranello-based team had hoped to try out the extended fin on Thursday, but in the end the team waited until this afternoon so as to conduct back-to-back runs with the old and new design over the course of the day.
Ferrari's move comes just a fortnight after their main title rivals McLaren evaluated a shark fin design during the pre-Hockenheim test.
Although the fins do not create downforce themselves, they do help tidy up airflow to the car's rear wing.
Autosport technical consultant Gary Anderson said: "It's another airflow device. If you imagine the airbox, when you're going at high speed - say over 120mph – it can't take in all the air that is coming at it. So you get spillage around the sides of the engine cover.
"That spillage can affect the rear wing, so you're trying to tidy that up and get it to the rear wing in as uniform condition as possible."
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