Possibly broken when used with latest dependencies

[consideRatio]

I think for example Open JupyterLab is broken currently, because in jupyterhub/jupyter-server-proxy's test suite we have a failure that shows up even if jupyter-server-proxy hasn't become involved yet.

The test failing is declared here, and its slimmed down to try to isolate what the failure is about. I expect the failure to show in this projects test suite as well.

This is the information I see from the failure:

Set Up And More Test                                                  | FAIL |
WebDriverException: Message: Process unexpectedly closed with status 1