Is it possible to use blocks within prefect_test_harness?

Help
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1

I am writing a test to run a flow which uses blocks.

from prefect.testing.utilities import prefect_test_harness
from flows.flow import (
    my_flow, Parameters
)


def test_my_flow():
  with prefect_test_harness():
      
      my_flow(
        parameters=Parameters(
            model_filesystem_slug="local-file-system/models",
            predictions_filesystem_slug="local-file-system/predictions",
        )
    )

However, it doesn’t seem able to find the block definitions even after I do prefect profile use <profile_with_blocks> before running the test.

ValueError: Unable to find block document named <block-name> for block type <block-type>

Are there any examples of running flow tests that use blocks?

If I simply run the flow with python path/to/flow.py it works fine and has access to all the blocks, but I want to add the flow tests to the CI.

Many thanks,
Beth