We are going to stop automatic packing and delivery of updates in the testing channel. The plan is to provide a documented(in the UI) alternative for non-subscribers(testing channel) to follow to get updates. Right now, we are finalizing these steps. If you are on testing channel, you will get one or more updates as we transition into this new way. If you really want updates in the meantime, your choices are 1) subscribe to stable channel or 2) figure out the manual steps yourself from available docs. This can be very risky, even if you have high levels of linux and programming skills.