// lock it down due to URL templating: "http://{env}.{dc}.example.com".
    UrlComponentEncodingTester
      .newInstance()
      .nonPrintableAscii(Encoding.FORBIDDEN)
      .nonAscii(Encoding.PUNYCODE)
      .override(
        Encoding.FORBIDDEN,
        '\t'.code,
        '\n'.code,
        '\u000c'.code,
        '\r'.code,
        ' '.code,
      ).override(