How can I submit test Stripe transactions?

Stripe doesn’t have a “test mode.” Instead, each account has two sets of API keys - one for tests, and one for production.

When connecting Keap to Stripe, it grabs the production API keys and I haven’t found a way to change which keys it selects.

I tried setting up a test Stripe account, but it won’t accept a Keap connection unless I set up a bank account and all my business information, which I assume means that account would just connect in live mode as well.

Has anyone figured out a way to use Stripe in test mode through Keap? This is getting a bit ridiculous for something that ought to be simple.