Ian Madigan kicked 17 points to guide runaway RaboDirect PRO12 leaders Leinster to victory over bottom side Aironi at the Stadio Zaffanella in Viadana.
Madigan, 22, slotted over five penalties to keep his side just ahead of Aironi before the fly-half wrapped up the scoring five minutes from time after converting Noel Reid's interception try.
Aironi, having trailed 9-0 at half-time, got back to within three points by the 60-minute mark thanks to second-half penalties from Naas Oliver and Luciano Orquer, but they could not get any closer as Leinster took the spoils.
The victory helped Leinster stay well clear of second-placed Ospreys at the top of the table and also saw the 2011 Heineken Cup champions equal Munster's tournament record of 14 games unbeaten, which was set last year.
Aironi, meanwhile, continue to prop up the standings having picked up just three wins in their 16 games.