val response2 = get(server.url("/"))
    assertThat(response2.body.string()).isEqualTo("A")
    assertThat(response2.header("Warning")).isNull()
  }

  @Test
  fun getHeadersRetainsCached200LevelWarnings() {
    server.enqueue(
      MockResponse
        .Builder()
        .addHeader("Warning: 299 test danger")
        .addHeader("Last-Modified: " + formatDate(-1, TimeUnit.HOURS))