protocol: Protocol,
    mockWebServer: MockWebServer,
  ) {
    setUp(protocol, mockWebServer)
    server.enqueue(
      MockResponse.Builder()
        .addHeaderLenient("Alpha", "α")
        .addHeaderLenient("β", "Beta")
        .build(),
    )
    val call = client.newCall(Request(server.url("/")))
    val response = call.execute()
    response.close()