val frResponse = client.newCall(frRequest).execute()
    assertThat(frResponse.body.string()).isEqualTo("A")
    val enRequest =
      Request
        .Builder()
        .url(url)
        .header("Accept-Language", "en-US")
        .build()
    val enResponse = client.newCall(enRequest).execute()
    assertThat(enResponse.body.string()).isEqualTo("B")
  }

  @Test