Prevent Adobe Target visitors from seeing activity and test on live with gatekeeper URL

1. Edit the Activity in question.
2. From inside the VEC click the little gear icon.
3. Select "Page Delivery" (See screenshot below)
4. Change the drop-down for the operator from "OR" to "AND" (This is critical.)
5. Click on "+ Add template Rule" and select "URL"
6. For the "Choose evaluator" drop-down select: "contains"
7. In the blank field, type something unique like yournametesting=123
9. Click "Save" (See screenshot below)