Prior to the super fun maze in which a werewolf was a good guy and Dean had almost become a zombie, Dean would have tested Sam six ways from Sunday. But after the last few days, and since he (God help him) trusted Phaedra and Harry enough to know their shit, Dean didn't do that right away.
He just hugged his brother.
When that was done, he stepped backward and looked at him.
"I have a flask full of holy water, and couple different knives... but I don't think I need to do that. Because this is the Twilight Zone. Every day. And I don't think I'm going to be wrong on this one."