OC Transpo has begun testing the new trains for LRT Stage 2.
The trains will be tested on the Confederation Line in the evenings and on weekends.
Officials said in a release that the testing will have no impact on normal day-to-day operations.
The test trains will be clearly marked as not in service, and while they may stop at stations they will not be picking up passengers.
To find out more about LRT Stage 2 visit the project website.