Ring test accurate or myth?

I just did the ring test. It went side to side over my stomach. I stopped it and did it again. It indicated boy everytime. My sister who isn’t pregnant said we should test it. With her it swung in a few little circles and then stopped moving. It didn’t stop moving with me😱 it just kept getting faster back and forth. It was right with my daughter so let’s see if it’s right this time!!