It is thought the system will be ready for service in summer 2014.
The tests are the final part the development of this section of the route.
The 2.8km stretch will be handed over to the Council in March following testing and commissioning.
Transport Convener Lesley Hinds and Transport Minister Keith Brown watched the tram test take place from the Gogar Farm Crossing.
Cllr Hinds said: "Much progress has been made in 2012 with bridges built, tram stops completed, miles of track laid and, most importantly, the project remains on track to hit the revised budget and timeframe.
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"On-street works in the city centre will continue next year of course, but we are doing everything possible to limit disruption. Our team will stay in close contact with residents and businesses so they have the information they need to limit the impact of the works."
Transport Minister Keith Brown said: "I was heartened today to see the project taking shape, and Transport Scotland is now playing a key role in overseeing the delivery.
"It will also bring major benefits for the rest of Scotland's transport network. The Airport tram stop, combined with the Edinburgh Gateway rail-tram interchange, refurbished Haymarket Station and existing station at Edinburgh Park, will provide better links and more options with the rail network, Edinburgh Airport and other key transport hubs."
Work will continue until Friday 21 December and will resume on Monday 7 January.
(IT)
