call.enqueue(callback)
    client.dispatcher.cancelAll()
    callback.await(server.url("/")).assertFailure("Canceled", "Socket closed", "Socket is closed")
  }

  @Test
  fun cancelWhileRequestHeadersAreSent() {
    server.enqueue(MockResponse(body = "A"))
    val listener: EventListener =
      object : EventListener() {
        override fun requestHeadersStart(call: Call) {
          try {