Twitter has tested new design ideas in its Android app for a while now, and today the company rolled out a new experiment that swaps out the “favorite” star icon with a new heart. Some users have started seeing the change today, while others will still see the old star while Twitter measures the impact that the change has on users’ usage habits.

There are at least two different versions of this design appearing to select users. One uses circled icons for replying, retweeting, and favoriting (as seen above), while the other uses borderless icons like the ones currently seen in the app.

Depending on how the test goes, the change may never roll out to the general public.

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[tweet https://twitter.com/Magnus_Jamieson/status/611244975196651521 align=’center’]

[tweet https://twitter.com/keeltyc/status/611264657354059776 align=’center’]

[tweet https://twitter.com/manuisfunny/status/611249313172332544 align=’center’]

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