The next time you walk the aisles of Walmart, you may come face-to-screen with a robot.

The world's largest retailer has already tested shelf-scanning robots in several stores in Arkansas, Pennsylvania, and California, and is now expanding them to an additional 50 locations. The tall, rolling bots use data and vision technology to carry out mundane tasks like finding items that are out of stock, priced incorrectly, or missing labels.

This frees up living, breathing workers "to focus on what they tell us are the most important and exciting parts of working at Walmart — serving customers and selling merchandise," the company wrote in a news release.

On top of that, Walmart said the robots can locate specific items and check inventory levels. This will help the company offer a larger variety of products to online grocery pickup customers, and make it easier for personal shoppers to fulfill those orders.

For a peek at Walmart's new robots, check out the video above.

"This combination of people and technology is helping make our stores more convenient and easier to shop, ensuring that products are available when our customers want them," Walmart wrote.

Meanwhile, Walmart recently teamed up with smart home device maker August to test a new in-home delivery concept: dropping off packages inside your home — even if you're not there — and putting your groceries away in your refrigerator. Rival Amazon this week announced a similar in-home delivery service for Prime members, dubbed Amazon Key.