addHeaderLenient(headersBuilder, "a\tb: c\u007fd")
    addHeaderLenient(headersBuilder, ": ef")
    addHeaderLenient(headersBuilder, "\ud83c\udf69: \u2615\ufe0f")
    val headers = headersBuilder.build()
    server.enqueue(MockResponse(headers = headers))
    val response = getResponse(newRequest("/"))
    assertThat(response.code).isEqualTo(200)
    assertThat(response.header("a\tb")).isEqualTo("c\u007fd")