At Stockton, California, and St. Louis restaurants, McDonald's (MCD) patrons can order Garlic Parmesan, Zesty Ranch and Spicy Buffalo fries. The new fries require some assembly and come with step-by-step instructions for customers to sprinkle their fries with seasonings.
McDonald's spokesperson Lisa McComb confirmed the tests, which Foodbeast.com first reported, to CNBC.
Restaurant chains often test items in select markets before deciding whether to expand a new item nationwide.
No word yet on whether McDonald's will expand the test.
"As with all tests, we aren't in a position to draw conclusions or make assumptions about the test since it is just beginning but we hope customers in these two markets enjoy the new flavors," McComb said.
The move comes as McDonald's battles to turn around its U.S. same-store sales, which have dropped 1.3 percent so far this year.