Fast food giant McDonald's is set to expand its test of chicken wings, known as Mighty Wings, to Chicago the week of January 6.

The decision is being made after a successful trial in Atlanta in 2012. The wings are being sold in servings of three, five or 10 pieces with prices starting at $3, Lynne Collier, an analyst with Sterne Agee, told the Associated Press.

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A McDonald's spokesperson confirmed with AP that the test in Chicago would start the week of January 6 at about 500 restaurants, but added there weren't any plans yet to bring the wings to other cities.

For McDonald's, which has 14,000 U.S. locations nationwide, adding chicken wings to the permanent lineup could be a difficult task. It could also likely drive up prices of wings. Prices for chicken wings have been climbing over the past year. In December 2012, the cost of wings in the wholesale market in the Northeast was 26 percent higher than a year ago. Wings sold for $1.90 a pound that month, compared with $1.30 a pound for boneless, skinless chicken breasts, according to the U.S. Department of Agriculture.