Implement "Parameter loop"
Referring to this post.
I would like TC to have a feature, somewhat similar the "Browser loop" implemented, that will run a specific test (which has parameters) to iterate through all parameters, each iteration set with one parameter value = NULL (or a user-defined value).
That way you can quickly test how the application you are testing handles empty parameters (negative testing).
Currently you can build your own solution (as described here), but this solution requires a lot of maintenance in applications changing amount/order of parameters.