Setting creation of feature dataset as precondition to iterative process using ArcGIS ModelBuilder?

When using ArcGIS ModelBuilder, how do you set the creation of a feature dataset as a precondition to an iterative process, and not have it re-create the feature dataset each time through?

This is the model that I’m using:

I need the model to first create the feature dataset Test_FD and then populate that with feature classes in TestGDB. However, the model creates the feature dataset each time through the iteration. How can I get it to only create the feature dataset once, and then run the iterative process?