AirBnB was virtually useless on this problem. However, I did find something that worked for me. After waiting 5 days for a call back, I called AirBnB support. After about 15 minutes on the phone, the Rep told me that my listing had been created by a third party system. Or at least that is what HIS system showed him. I assured him (argued with him actually) that I used the native AirBnB website on a Mac, using Chrome... and my listing was NOT created using some third party system. Unable to convince him otherwise, I told him that I would create the listing again, replicate the problem, only this time screen record the steps I took in their native interface. Took all of 5 mins to recreate the problem. While sitting on hold, waiting to get back to the same Rep that took the call, I decided to check my Account | Privacy & Sharing | Service tab. Wheelhouse and Community Center were the only two services listed. I don't use Wheelhouse, but I believe I signed up for an eval 3-4 months ago. And I have not attempted to create a NEW listing during that period. I Removed Access from Wheelhouse, went thru the New Listing Creating steps again... and this time... fixed! No more "This is a Test Listing:...." banner.
My theory is that their is a bug on AirBnBs side, where they see the Wheelhouse service as the app responsible for creating the listing, and somehow the wrong bit it being flipped and AirBnB thinks Wheelhouse is creating a TEST listing. AirBnBs APIs probably allow third party developers to create test listings so they can QC their own code. Given that the third party developers can't replicate the AirBnB site in their own sandbox. So they get to use the live AirBnB site as a test area.
One other tidbit... it didn't mater if I created the new listing from scratch OR I cloned and existing listing. Tried it both ways, and if Wheelhouse was listed under services, the listing would end up in test status.
<update, testing while writing this> Easy Path to Fix - I decided to try to clone one of the listing that was infected with the "This is a Test" banner/status. As long as I had Removed Access for Wheelhouse, under the services area... the cloned listing was NOT effected with the Test status. So try, 1) remove Wheel House from Services, 2) Create New Listing using existing Listing, 3) Select the listing that is stuck in "This is a Test", (I selected to keep the photos from the source listing), 4) Complete the new listing creation process.... and would should be good.
Good luck!