Generate recurring invoices for future opened month for testing

Summary

Testing Auto receipts; need to generate another month's of invoices

Content

Hello:

We are doing some testing for auto receipts and have already generated and paid the current month's recurring invoices.  I thought we could open the next month and run generate recurring for the next month, but nothing is generated.  Does anyone know how this can be accomplished in the test environment?  I'm assuming there is not way to change the "system" date so it thinks it in the next month.

Tks!