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Are there any examples of running local unit tests to verify your tasks are working? I'd like to have some pre-deployment checks in my GitHub actions.

So far we have:
• <https://docs.prefect.io/core/idioms/testing-flows.html|this page> about unit-testing flows and tasks
• this <https://github.com/PrefectHQ/prefect/discussions/4042|discussion> about CI/CD in Prefect with several examples from other users

Thank you. I've got my first flow reading in to my test with `extract_flow_from_file` but I'm struggling to figure out how I might override a default parameter before calling it with `.run()`. Is there a way to do that?

for sure, but can you explain what exactly do you mean? Parameter defaults can be provided in their definition and when triggering a flow run, you can overwrite them e.g. the `create_flow_run` task (or mutation) allow you to pass your custom parameter values

Ah. create_flow_run must be what I need! I'll try it. Thank you.

Here is the overly simplistic idea I'm trying that is failing. Clearly I'm missing something obvious about how to approach this.

```    flow = extract_flow_from_file("flow.py")
    assert len(flow.tasks) == 4
    flow.validate()
    create_flow_run(
        flow_id=flow.id,
        flow_name=flow.name,
        parameters={
            "scrapers": ["ia"],
        }
    )```

For me, I think the helpful example would be a simple doc that shows "Here's how you import your hello-world.py flow and run it inside a test."

I think I found it! <https://github.com/PrefectHQ/prefect/blob/master/tests/test_hello_world.py>

yup, you can import your flow object within your tests. Nice that you found it