fun missingPongsFailsConnection(protocol: Protocol) {
    setUp(protocol)
    if (protocol === Protocol.HTTP_2) {
      // https://github.com/square/okhttp/issues/5221
      platform.expectFailureOnJdkVersion(12)
    }

    // Ping every 500 ms, starting at 500 ms.
    client =
      client
        .newBuilder()
        .readTimeout(Duration.ofSeconds(10)) // Confirm we fail before the read timeout.