Our spy photographer snapped these shots of a test mule for the next-gen Audi TT conducting winter testing in Sweden. Though it wears the current model's sheet metal, underneath is likely Volkswagen Group's new MQB modular platform.

This mule is a dead ringer for the current-generation TT, and if Audi wasn't out testing it in the frozen landscape of Sweden, we'd have no reason to suspect anything was amiss. However, our observant spy shooter noticed a slightly longer wheelbase and barely wider fender arches when he got up close to this well-disguised test mule. He also took note of a more robust exhaust tone as the car drove by.

As we previously reported, Volkswagen's MQB architecture will appear on several transverse-engined VWs and Audis, including the next VW Golf, Jetta, and Passat, as well as the Audi A3 and A1. This modular strategy will allow for greater parts sharing, and will also cut weight by using more high-strength steel and aluminum in the body - a fact that should greatly benefit the sporty TT.

Though we don't learn all that much from seeing this next-gen TT mule, it's good to see Audi is underway with the new model's development. Here's hoping Audi gives us more to look at the next time we see the TT out and about.