With v1.50.2, no test was failing, while with v1.53.2, a lot of tests are failing. Did something change between these two versions w.r.t. tests that could have triggered this? How do they pass in RClone CI, and is there some additional configuration that we can do (except skipping them the way you suggested). Since I did not need to skip them earlier, I feel a little apprehensive why should I have to skip now. The RClone documentation on testing has always seemed very insufficient.
The errors you posted are from a Windows machine and I don't think the machinery used to start the docker containers will work there as it is written in bash.
Which tests do you want to run? Tests for all of rclone? In which case the recommended thing to run is make quicktest
Or are you trying to run FTP tests in particular? If so you need to set up an FTP server for rclone to talk to and pass it in as go test -v -remote MyTestFTPServer: