However, Business Insider grabbed screenshots of the opt-in pop-up that appears when you’re invited to test the revamped website, which promises other features like night mode, data saver and more.

These are not necessarily “new” features though — Twitter rolled out its dark-themed “Night Mode” to the web client a year ago.

The differences appear to be more subtle, as it turns out. For example, Night Mode is now a toggle switch, as is Data Saver, instead of an option to click on from your settings menu.

Trends also shifted from one side of the home page to the other, underneath the “Who to follow” suggestions, which gives the interface a cleaner, more organized appearance.

The “Compose Tweet” pop-up looks different as well. Instead of a boxed-in rectangular area to write in, it’s more of an open space with an underline. The “Location” button is missing on Compose, too, and the “Tweet” button has moved to the top.

The addition of Bookmarks to the web client is the biggest and most welcome change. The feature publicly launched in February of this year on mobile platforms, but had not yet made it to the web. None of the other tweaks seem to be radical changes, though — not like the update that turned Twitter’s stars into hearts, for instance, or the one that introduced threads.

Twitter declined to say how many users were being opted in at present, or when the experience would roll out more broadly. But if you’re being offered the opt-in, you’ll see it.