Thank you for your inquiry.
This can be done under "Plan" in your account view (instead of your space view).
You will find the "Plan" category in the navigation to your left.
Make sure that you are in your account instead of your space (can be chosen to your left).
As long as your testing period is still active, all subscriptions can be tested individually.
I hope this helps. Please let me know in case further clarification is needed.