Wingstop Inc., which launched its first delivery test in April at nine Las Vegas units, expanded it to the 50-unit Chicago and suburban market.

Dallas, Texas-based Wingstop, with more than 1,000 locations worldwide, said it will use the on-demand restaurant delivery platform DoorDash, which was one of the partners in the Las Vegas test.

"Our successful delivery test in Las Vegas supports what we have been hearing from fans around the country, and seeing in the restaurant industry as a whole: today's guests want to enjoy the food they crave, from the brands they love, in the most convenient way possible," said Charlie Morrison, President and CEO of Wingstop. "We were extremely pleased with the results from our Las Vegas test and are excited about the possibilities that our Chicago delivery test will bring."

With extensive suburban coverage, the Chicago market is home to 50 Wingstop restaurants and will see exclusive menu offerings in addition to delivery services. All test locations will offer guests new side-order menu items including mac-and-cheese, fried corn and two new options for hand-cut fries: Louisiana Voodoo fries and Buffalo Ranch fries.

Wingstop locations in Las Vegas have sustained a 10 percent increase in sales during the company's first delivery test in that market, which launched in April of this year. Since then, Las Vegas Wingstop locations continue to offer delivery through DoorDash. Based on the success of the Chicago test, additional markets may be added in 2018.