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Hi all, I'm working on unit testing some flows in Prefect 2 - what are the best practices for populating Blocks via Pytest fixtures?

Here’s an example with prefect-aws

define the credentials block in conftest
<https://github.com/PrefectHQ/prefect-aws/blob/main/tests/conftest.py#L17-L30>

and then pass into test args
<https://github.com/PrefectHQ/prefect-aws/blob/main/tests/test_secrets_manager.py#L58-L69>

the `prefect_db` fixture is so it doesn’t save the test flow runs into your actual db