val call1 = client.newCall(Request(server.url("/")))
    val response = call1.execute()
    call1.cancel()

    // That connection is pooled, and it works.
    assertThat(client.connectionPool.connectionCount()).isEqualTo(1)
    val call2 = client.newCall(Request(server.url("/")))
    val response2 = call2.execute()
    assertThat(response2.body.string()).isEqualTo("def")