Pramac's MotoGP rookie Andrea Iannone will join factory Ducati rider Andrea Dovizioso in switching to the new 'lab' Ducati this weekend in Germany.

"I'm very positive for this weekend because the test we had at Misano went pretty well," said the Italian, who has scored in five of the seven races this year.

"I'm happy because I had the chance to try the new bike, which I'll use for the rest of the season.

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"I had a positive feeling, which I hope to be able to take advantage of immediately in order to improve my pace and be closer to Nicky and Dovi. With the team, we'll work even harder to understand where and how to gain valuable time."

Alongside Iannone at Pramac will again be Ducati test rider Michele Pirro, who has been race-developing the 'lab' version of the GP13 as a replacement for the injured Ben Spies. Germany will be Pirro's last planned event as a stand-in for Spies, with Alex de Angelis stepping in at Laguna Seca before Spies' planned return after the summer break at Indianapolis.

"I'll use the same bike that I've ridden until now, the 'lab', and we'll continue our work," said Pirro of the Sachsenring weekend. "After this race I'll get back to testing full-time until Misano, where I'll be on the [MotoGP] grid as a wild-card rider with the Ducati Test Team."

The highlight of Pirro's rides so far is a solid seventh place at Mugello.

Nicky Hayden, Dovizioso's factory team-mate, will be the only rider not on the 'lab' Ducati in Germany, having opted to stick with the standard version.