Walmart has a new weapon in its online grocery war with Amazon (WMT)

Walmart delivery

Walmart is testing delivering groceries straight to your fridge when you're not home.

On Friday, the retailer giant announced a partnership with smart lock startup August Home that will allow a delivery person to enter customers' orders and put groceries away in their refrigerators.

The test will take place in Silicon Valley, with a small number of August Home users who have opted in to the service.

"Think about that — someone else does the shopping for you AND puts it all away," Sloan Eddleston, Walmart's vice president of e-commerce strategy and business operations, wrote in a blog post Friday.

Eddleston laid out the step-by-step process of "in-fridge delivery" in the post.

Walmart delivery

Delivery drivers will have a one-time passcode that allows them to unlock the August smart lock if customers do not answer the door when the delivery team arrives to drop off groceries. They will then drop off packages in the foyer, unload groceries in the fridge, and leave — with the door locking behind them.

Customers get a notification when the driver rings the doorbell. August home security cameras then allow them to watch the entire process from the app, if they so wish.

Walmart has been making major investments in its e-commerce business as it faces off against an increasingly dominant Amazon. Online sales across Walmart grew 73% year-over-year in the second quarter of 2017, with grocery making up 26% of the company's US e-commerce sales for the quarter.

"What might seem novel today could be the standard tomorrow," Eddleston said. "This may not be for everyone — and certainly not right away — but we want to offer customers the opportunity to participate in tests today and help us shape what commerce will look like in the future."