async def test_39aa(http_client):
    """
    MUST accept a map for the {extensions} parameter
    """
    response = await http_client.post(
        url="/graphql",
        headers={
            "Content-Type": "application/json",
            "Accept": "application/json",
        },
        json={
            "query": "{ __typename }",
            "extensions": {"some": "value"},
        },
    )
    assert response.status_code == 200
    assert isinstance(response.json, dict)
    assert "errors" not in response.json

    MUST accept a map for the {extensions} parameter
    
tests/http/test_graphql_over_http_spec.py