Bro,
It's extremely unlikely they'll run test levels. This is usually a CBC, and chemistry panel kind of thing. Not very specialized. And HIV.
However, if you've been on Dbol for 3 weeks it's possible your transaminases (ALT, AST) may be up a tad. They WILL want to know why if they are. (they're looking for chronic hepatitis, etc, not a good insurance risk).
Best thing is to act ignorant, say there's never been anything wrong w/ your blood work before, and perhaps set up a re-draw on the blood. If they've come down, lab error. If not...
By the way, this post is pure entertainment, a flight of fancy on my part. Not to be heeded in any way, and taken with a Kg of salt.