is there anybody that is unit testing stacks? I started today but I am flooded with deprecation warnings?

What warnings are you seeing? Are you following the patterns in https://www.pulumi.com/docs/guides/testing/unit/, or something else?

deprecation warnings, things are getting changed internally within Pulumi but I don't use them explicitly so not sure why they appear. I am following the example, the only difference is I am using pytest instead of unittest, but shouldn't change anything

Interesting - do you have a code snippet you could share? Or perhaps open a github issue? I don't think that is expected.

hey Luke, here a gist with warnings https://gist.github.com/MattBlack85/1c961af3842284bedf5e3028d6aa75a1