I need help with prefect test harness. I am running the hello world test from the docs

from prefect import flow
from prefect.testing.utilities import prefect_test_harness

@flow
def my_favorite_flow():
    return 42

def test_my_favorite_flow():
  with prefect_test_harness():
      # run the flow against a temporary testing database
      assert my_favorite_flow() == 42

But... I'm in a virtual environment for my actual job, and my prefect profile includes this setting PREFECT_LOGGING_EXTRA_LOGGERS='jds' so I assume this is where the value of v in the stack trace below is coming from.

hrm what version are you on?

» PREFECT_LOGGING_EXTRA_LOGGERS='jds' ipython
In [1]: from prefect.settings import Settings

In [2]: Settings().logging.extra_loggers
Out[2]: ['jds']

In [3]: !uv pip list | rg prefect
prefect                    3.0.12.dev2+3.g9f2f47572d /Users/nate/github.com/prefecthq/prefect

Currently on 3.0.11

sorry, i meant to suggest it might work on

main

if not in the most recent version on PyPI but im thinking now it might have to do with

temporary_settings

(used by test harness)

There is barely any documentation on using the test harness facility. Should I read the source for how to change settings in the test harness?

Hi Janet. That’s probably the best option, and agree more docs could be helpful there. Want to open an issue to track in the GH repo?

@Jeff Hale Logged #15890