Is the a way to test for a dead diode?

I've got a diode (or two) that no longer works with it's driver. Is there a test that I can do with my DMM to determine it's status. Of course, I think they're dead, but they are 6Xs and I don't want to toss them until I'm sure.
I appreciate any guidance you may provide...

Of course, of course I could bash them with a hammer and then I'd know they were dead...

heh. I still have a BDR-S03 diode sitting on my desk. I KNOW it's dead, but i can't bring myself to toss it....although it still outputs like 5mW....so maybe once day i'll want a 5mW pointer that generates tons of heat

Well, there's some consolation in knowing that I'm in good company.