The test train was part of works to test the line and the signalling system, as the project gears up to open in late August.
During the testing, the train was driven from Woodville Station and along the Outer Harbor line, then into Port Dock Railway Station.
Once the project is complete, the 1km spur line will connect the new Port Dock station, plaza and bus interchange at Baker Street to the existing Outer Harbor rail line. It will also provide improved access for pedestrians and cyclists.
The test train was driven by experienced train driver Brett Watson, who has been driving trains on the Adelaide Metro network for almost 14 years.
The Port Dock Railway Line Project is funded by the South Australian Government and is supporting 100 full-time equivalent jobs during construction.