async def test_78d5(http_client):
    """
    MUST assume utf-8 in request if encoding is unspecified
    """
    response = await http_client.query(
        method="post",
        headers={"Content-Type": "application/json"},
        query="{ __typename }",
    )
    assert response.status_code == 200

    MUST assume utf-8 in request if encoding is unspecified
    
tests/http/test_graphql_over_http_spec.py