I created my first Android app and wanted to let some users take part at the new Google beta testing feature. Unfortunately my app got published as a production APK and is visib
Provided the constraints you have, I guess your best option is to set the filter of the APK to no devices if allowed; if not, set it to a single device (one you figure there are almost none in the market).
Additionally, you can change your publishing options for no country (or, again, to a single small country), although I think that might impact the beta testers as well...