Why does my generated video still have a watermark even though I set "test": false in the request parameters?

below is my payload

{
"template_id": "7b05f7b3c36d4b42b1aaa280a0fd00ca",
"title": "测试替换",
"variables": [
{
"properties": {
"id":"d4fbedd609464ba68c1dd670a05afa8b",
"audio":"https://resource.heygen.com/audio/87ff547dc1d04b2fa246b3af0ea84c08/transcode.mp3"
},
"name": "photar_0"
}
],
"test": false
}

below is response body
{
"code": 100,
"data": {
"video_id": "5b697d1da0e1484d9e7a41816cf65f08"
},
"message": "Success"
}