Hi,
Thanks for your post in Microsoft Community.
I understand that you want to use devcon for your tests.
There may be no way here to help you with your problem, your problem is beyond our support.
We recommend that you ask your question in a more appropriate place. Microsoft Docs is where developers gather, and maybe you can get the solution you're looking for here.
Thanks for your patience and understanding!
Kirk | Microsoft Community Support Specialist
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