val updatedTimestamp = response2.receivedResponseAtMillis
    assertThat((updatedTimestamp - t1).toDouble()).isCloseTo(0.0, 250.0)

    // A full cache hit reads the cache.
    Thread.sleep(10)
    val response3 = get(server.url("/a"))
    assertThat(response3.body.string()).isEqualTo("A")
    assertThat(response3.header("Allow")).isEqualTo("GET, HEAD")