      wsHandler: (conn, req) => {
        conn.write(req.url)
        conn.end()
      }
    })

    t.teardown(() => backend.close())

    const backendURL = await backend.listen(0)

    const [frontend, frontendURL] = await proxyServer(t, backendURL, backendPath, proxyOptions, wrapperOptions)

    t.teardown(() => frontend.close())

    for (const path of paths) {
      await processRequest(t, frontendURL, path, expected(path))
    }

    t.end()
  })
The product receives input or data, but it does
        not validate or incorrectly validates that the input has the
        properties that are required to process the data safely and
        correctly.