Google is testing new slightly tweaked icons for Gmail on desktop that match the ones on the mobile app. Android Police reports that some users are starting to see the app-like icons on their desktop ...

It appears as though Google is testing some tweaked icons within Gmail on desktop to closely mimic icons seen on the Android and iOS apps.

Gmail has made a number of small changes to the icons on the desktop client. As reported by Android Police, the subtle tweaks now match those on the app to create greater continuity.