Oh right ( after updating to 10.3.5 anyway)
Just after “Pay in 3” there is a line
———- OR ———-
See advanced options
Once you open that advanced options dropdown there is the “Enable Sandbox Mode”
Thanks Jamie for putting me on the right track.
Thanks Jamie for your response. I do not seem to have the “Enable sandbox” option.. If I detach my live paypal account .. then go WooCommerce >> settings >> payments >> Paypal >> Complete Setup … I get a Connect your PayPal account page. If I try my sandbox business credentials the login fails at “Connect to Paypal”. If I use my live credentials I get through to the “Your’re almost there” page with the button “Return to WooCommerce” and then I’m in again with my live credentials, but no enable sandbox option … I’m running plugins WooCommerce 10.3.4 and WooCommerce PayPal Payments 3.2.1 . This is running on a test server that can get to the internet but does not (yet) take requests from the internet, but I would not have thought that would be needed for sandbox testing
