def METHOD_NAME(client):
    res = client.post("/predictions")
    assert res.status_code == 200
    header, b64data = res.json()["output"].split(",", 1)
    # need both image/bmp and image/x-ms-bmp until https://bugs.python.org/issue44211 is fixed
    assert header in ["data:image/bmp;base64", "data:image/x-ms-bmp;base64"]
    assert len(base64.b64decode(b64data)) == 195894