.build(),
    )
    val webSocket = newWebSocket()
    clientListener.assertOpen()
    val server = serverListener.assertOpen() as RealWebSocket
    Thread.sleep(1000)

    // No pings and no pongs.
    assertThat(webSocket.sentPingCount()).isEqualTo(0)
    assertThat(webSocket.receivedPingCount()).isEqualTo(0)
    assertThat(webSocket.receivedPongCount()).isEqualTo(0)
    assertThat(server.sentPingCount()).isEqualTo(0)