 In November 2013 it was reported that the first four cars would arrive before the end of 2013 and that they would then be tested for 30 weeks, allowing Metro to troubleshoot any issues before full production begins.Metro unveiled the first 7000-series quad set at Greenbelt on January 6, 2014.The set underwent acceptance testing for at least eight months in order to finalize design specs and work out any problems.