Apple's testing a new version of iTunes with its upcoming iTunes Radio service built in, and is now giving it to developers to test.
The feature was bundled inside a beta version of iTunes 11.1, which went up on Apple's developer site Monday.
iTunes Radio was introduced alongside iOS 7 at Apple's annual developer conference last month. The service lets users stream music stations for free, and with no advertising if they're a subscriber of Apple's iTunes Match service.
Initial beta versions of iOS 7 and iOS for the Apple TV already included iTunes Radio integration.
The new version of iTunes comes alongside a fourth beta of iOS 7, which went out to developers on Monday morning. It's unclear if the new iTunes will come out before that mobile software makes it to the public.