We would strongly recommend implementing this extension in a development environment before putting it live.
You need to set up the Woocommerce store to use the test account details as supplied by the Lloyds Cardnet team.
We would also recommend setting up the “test” Lloyds Cardnet back-office and enabling the test mode within the settings page. The Lloyds Cardnet test environment looks like this:
At the time of this writing, You can then use the test-card number below to make sure that a transaction fully completes.
If it does not work anymore, you could contact the Lloyds Cardnet team here- Cardnetipg@firstdata.com and they’ll be able to supply you with the working ones.