Null printer, RAMP, and Chrome OS

I have a user working from home on a Chromebook using Chrome OS. They are able to get into RAMP and utilize, essentially, everything they need to. However, we don't seem to be able to find a way to install a Null printer for Chrome OS as we normally do with Windows. In other applications when this was needed in Chrome OS, we simply print to PDF to satisfy printing requirements, however this doesn't seem to work in Tess. Any thoughts?