Ashley, one thing to keep in mind, if this is a batch campaign you cannot use the champion/challenger style test. Not sure if you're referring to a batch or triggered campaign, but if it's a batch campaign then only your champion email will go out.
If this is triggered, then you will know which performed the best using the dashboard as Val mentioned. Until you declare a winner, your tests will go out -- I think in the champion/challenger test it's always manual to declare the winner.