Maybe take a look at workflow based on linux-hosted AROS? Binary is available for testing right after compilation (no need to copy) and you can use GDB to debug it, which makes development cycles faster in my opinion.
That's true. I'm considering that approach to make it easier.
When I originally setup my Testing Environments they were in VirtualBox. So I have several flavors of AROS running there. Some are Native and some are Hosted on Ubuntu 16.04.
I had later acquired VMWare Workstation and my first Build System was for ABIv1. So at the beginning the Build System was seperate from the Testing Environments. Then later I installed Build Systems for AROS 68k and after that ABIv11. Recently I included ABIv0. So I have four Build Systems in VMWare on Ubuntu 18.04. There's no reason I can't run both Build System and Testing Environment in the same VM.
I will need to reconfigure my workflow to make things easier in the near future. Recently I purchased a new 2TB SSD because I'm running out of hard drive space. If I move my Icaros setup from VirtualBox on Ubuntu 16.04 to VMWare on Ubuntu 18.04 then with all my test files and apps that's about 4GB of data.
I'm currently using a 1TB SSD for development but it's too small.