client = get_app_client()
    client_no = get_app_client(separate_input_output_schemas=False)
    data = {
        "name": "Plumbus",
        "sub": {"subname": "SubPlumbus", "sub_description": "Sub WTF"},
    }
    response = client.post("/items/", json=data)
    response2 = client_no.post("/items/", json=data)
    assert response.status_code == response2.status_code == 200, response.text
    assert (

    assertThrows(IllegalArgumentException.class, mediaType::charset);
  }

  public void testGetCharset_unsupportedCharset() {
    MediaType mediaType = MediaType.parse("text/plain; charset=utf-wtf");
    assertThrows(UnsupportedCharsetException.class, mediaType::charset);
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(
            MediaType.create("text", "plain"),