Actually there is. You just have to schedule it. I keep meaning to do this with my home VOIP phone.
> Test calls confirm that your local 911 service can receive your 911 call and has the correct location information. Test calls can be scheduled by contacting your local 911 call center via its non-emergency phone number.
Maybe a different 3 digit number that goes through all the same hoops as 911 but it answers with an automated success message then hangs up.