you can pass the test by using the interface testing tools provided by Wechat"s public platform.

using koa2 to upload material is error 41005.
the code is as follows:

 let form = {
        media: fs.createReadStream(path)
    }

 return new Promise((resolve, reject) => {
        this.fetchAccessToken()
            .then(wx => {
                const ACCESS_TOKEN = wx.access_token
                const url = api_upload + "access_token="+ ACCESS_TOKEN +"&type=" + type

                axios.post(url, form)
                    .then(res => {
                  
                        let data = res.data
                        if(data) {
                            resolve(data)
                        } else {
                            console.log("")
                        }
                    }).catch(err => reject(err))
            })
    })

errors are as follows:

{ errcode: 41005,
  errmsg: "media data missing hint: [jXRSMA02471538]" }