McDonald's is rolling out cheesy bacon fries across the United States in 2019, a worker with knowledge of the situation told Business Insider.

The chain started serving the bacon-topped cheesy fries in select markets in November, and it has tested similar menu items in the past.

The cheesy bacon fries will roll out nationally early next year and have already been added to some stores' point-of-sale systems, the worker said.

McDonald's is rolling out cheesy bacon fries in 2019.

The fast-food chain is taking the bacon-topped dish national early next year, a McDonald's employee with knowledge of the situation told Business Insider. According to photos viewed by Business Insider, at least some stores have started adding the "loaded bacon fry station" to their point-of-sale systems.

Locations in Hawaii and Northern California began selling the cheesy bacon fries in November, Nation's Restaurant News reported. In a mid-November note, Mark Kalinowski of Kalinowski Equity Research said the test markets' locations suggested that McDonald's was taking the test seriously and that the odds were growing that the chain would roll out the menu item nationally in 2019.

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"I'm afraid I'll have to provide a cheesy no comment," a McDonald's representative told Business Insider in an email on Friday. "At this moment, our kitchens are bacon-ing something together. But we're not yet ready to share the gouda news."

The McDonald's worker said he was concerned about the possibility of confusion behind the scenes as workers learned to prepare the new dish, which he said had a new type of bacon.

Customers have already posted photos and early reviews of the fries from the test markets.

DAY 91: McDonald’s Cheesy Bacon Fries 🥓 🍟 🍴McDonalds 📍Hilo, Hawaii highly recommend!!! reminds me of the fries from in n’ out x poutine #cheesybaconfries #mcdonalds #imlovinit #nomnom #iconiceats A post shared by Iconic Eats (@iconic.eats) on Nov 7, 2018 at 7:59pm PST Nov 7, 2018 at 7:59pm PST

TRIPLE STACK BREAKFAST SAMMIES x CHEESY BACON FRIES from where?!!! @mcdonalds for the win! 😋🤤 They are definitely stepping it up with this one! #CERTIFIEDSHMACK A post shared by Welcome to Shmackville! (@shmackville) on Nov 24, 2018 at 3:19pm PST Nov 24, 2018 at 3:19pm PST

One Instagram user said the fries were reminiscent of In-N-Out's animal-style fries. Another person rated the dish a 7 out of 10.

#cheesybaconfries🍟 @mcdonalds A post shared by S🦋D (@kaji_warrior_808) on Nov 10, 2018 at 4:43pm PST Nov 10, 2018 at 4:43pm PST

McDonald's has long sold cheesy fries in other countries, including Spain and Canada. The chain has tested different versions of cheese fries in the US for years, including a limited-time offer of a loaded bacon and cheese basket of fries across four states in 2017.