Testing JMS Topic Subscriber in Tibco

I would like to test a process in Tibco, that starts with a JMS Topic Subscriber. I would invoke that process and then call a JMS Topic Publisher. The problem is that the Call Process activity cannot invoke a process that starts with a JMS Topic Subscriber.

Is there something similar for what I want to achieve?

I know it's possible to load and start two different processes, but I was looking for a more automated solution.