How can you test real vampire spells to see if they work?

In order to test a spell, one must perform the instructions step by step (such as reciting words aloud or combining various items together). However, since it is a popular belief that vampires, and also vampire spells, are not real, they cannot be tested effectively.

There is no scientific or otherwise compelling evidence to support the existence of vampires (let alone vampire spells) or the effectiveness of spells. However, as spells are magical formulas spoken with the goal of bringing about an intended effect, the best one can do is recite the spell and perform all steps while hoping for the best.