async def test_03d4(http_client):
    """
    MUST accept application/json POST requests
    """
    response = await http_client.query(
        method="post",
        headers={"Content-Type": "application/json"},
        query="{ __typename }",
    )
    assert response.status_code == 200

    MUST accept application/json POST requests
    
tests/http/test_graphql_over_http_spec.py