If your boss is the owner then maybe he won't send it but I imagine if he works for a company that does drug testing then it will be sent. I think if he was "on his own" he wouldn't have bothered if he wanted you back but he probably "had" to and your file, etc. will have the results and things will happen like you think?

You could be pro-active and go talk to him, tell him what happened, see if there are any exceptions, etc.?