The next time you’re browsing through your Twitter timeline on your phone, you may notice a small but impactful change to how the service handles images. With a small subset of iOS and Android users, Twitter has started testing full-sized picture previews, allowing users to see timeline images in their original aspect ratio.

Before starting today’s test, Twitter cropped all non-16:9 images to maintain uniformity on your timeline. Provided a tweet only includes one image and it’s in a relatively standard aspect ratio, the change will make it so that you don’t have to tap on an image to see it in its entirety. In theory, that should make the experience of browsing through your timeline more streamlined.

Additionally, the company announced that it’s also testing a feature that allows people to upload 4K-quality images from their iPhone or Android device. In the “Data usage” section of the settings menu, you’ll see a toggle to enable high-quality image uploads.

It might seem like a small thing for Twitter to change how it displays images, but it’s a significant one all the same. Over the years, there have been a lot of complaints about how the service handles images. Those came to a head last year when people found that Twitter’s image-cropping algorithm was focusing on white faces over black ones. “With this test, we hope to learn if this new approach is better and what changes we need to make to provide a ‘what you see is what you get’ experience for tweets with images,” said Twitter Chief Design Officer Dantley Davis of the test.

Twitter hasn’t said when the cropping change could make its way to all users. As with any test, the company could decide to keep things the way they are.