I was working on #595 and ran into this.

When running:

$ pytest --junit-xml=.

I receive a IsADirectoryError: [Errno 21] error.

What I need to pass to make this work is:

$ pytest --junit-xml=somefile

Could --junit-xml=. default to create some report file?

Otherwise, should the help text be altered to highlight that it must be a file name?