Proper way to testing async DelegateCommand

[GWawrzeniecki]

Hello
I am thinking about the proper way to test DelegateCommand where the async void method type is called.
Of course, the problem is that the Assert method is called before the DelegateCommand ends executing.
I came up with a few ideas:

• Make the method public (I don't want to do this, bad practice)
• Use awaitable DelegeCommand (Prism documentation (Brian) says it's pointless)
• Use Nito.AsyncEx library ( I have tried it, it's working )

For now, I think the third option is the best idea. But I don't know if this can cause some issues.