MockResponse.Builder()
        .clearHeaders()
        .streamHandler(body)
        .build(),
    )
    client =
      client.newBuilder()
        .addInterceptor(UppercaseRequestInterceptor())
        .addInterceptor(UppercaseResponseInterceptor())
        .build()
    val call =
      client.newCall(
        Request.Builder()
          .url(server.url("/"))
          .post(AsyncRequestBody())