Test purchase??

Just bought the guitar chords add-on which is working fine. However, when I opted to buy, Google Play popped up a dialogue that said the price was £1.94 (GBP in case the £ gets mangled) but that it was a test purchase and no charge would be made. The purchase seemed to go through OK and I received an email confirming that, but the message is a bit odd?

Just thought I'd let you know...

Steve.

Hello Steve,
Thank you for the info!
Your email address is included to the testing accounts.
You received a beta version when you had installation problems so that's why it shows up as a test purchase.

Best,
Niki