server.enqueue(MockResponse.Builder().failHandshake().build())
    server.enqueue(MockResponse(body = "response that will never be received"))
    val response = executeSynchronously("/")
    response.assertFailure(
      // JDK 11 response to the FAIL_HANDSHAKE:
      SSLException::class.java,
      // RI response to the FAIL_HANDSHAKE:
      SSLProtocolException::class.java,

      if (!processTunnelRequests()) return

      val protocol: Protocol
      val socket: MockWebServerSocket
      when {
        sslSocketFactory != null -> {
          if (firstExchangePeek.failHandshake) {
            dispatchBookkeepingRequest(
              connectionIndex = connectionIndex,
              exchangeIndex = nextExchangeIndex++,
              socket = MockWebServerSocket(raw),
            )