Add water and salt to a large pot and bring to a boil.
Add tortellini and cook for about 5-6 minutes, or until tortellini float to the top. Drain and rinse tortellini.
Add tortellini, cherry tomatoes and mozzarella balls to a large bowl. Add pesto and olive oil and toss to coat.
Add a tortellini, tomato and mozzarella ball to the skewer and repeat one more time to have 6 pieces on each skewer.
Refrigerate until ready to serve.