client.newCall(
        Request(
          server
            .url("/")
            .newBuilder()
            .scheme(scheme!!)
            .build(),
        ),
      )
    cancelLater(call, cancelDelayMillis)
    val startNanos = System.nanoTime()
    assertFailsWith<IOException> {
      call.execute()
    }
    val elapsedNanos = System.nanoTime() - startNanos