You can now complete a test order in test mode even when sales have not started yet.
Previously, in some cases you could not continue to checkout because the ticketshop did not show time slots while the sales start date was still in the future. This caused an incorrect message asking you to choose a visit date and time first.
This has been resolved. In test mode, the preview now uses the same time slots as the ticketshop itself, so you can test the full order flow through to the payment page.