async def test_13ee(http_client):
    """
    MUST allow string {query} parameter when accepting application/json
    """
    response = await http_client.query(
        method="post",
        headers={
            "Content-Type": "application/json",
            "Accept": "application/json",
        },
        query="{ __typename }",
    )
    assert response.status_code == 200
    assert isinstance(response.json, dict)
    assert "errors" not in response.json

    MUST allow string {query} parameter when accepting application/json
    
tests/http/test_graphql_over_http_spec.py