How can I be sure that rubyntlm is installed correctly?

Does WinRM-1.x.x.gem need to be installed for rubyntlm to work?

I run gem list, and I see rubyntlm is installed. But does that mean it
should now be able to work?

I am trying to get Ruby/Linux to connect to the my Windows machine. I
don’t think the problem is on the Windows server because it can accept
winrm connections via Python. Port 5985 is not blocked between the
Linux server and the Windows server.