High speed tests using the new Pendolino ED250 on the CMK Central Rail Line began in November 2013. On the first day of tests, November 16, the Pendolino reached . On 17 November 2013 a new speed record for Polish railways was set at km 184.000 of Polish Line No. 4 when Pendolino ED250 reached a speed of , breaking the 19-year record of . On 24 November 2013 the final day of tests on the CMK Central Rail Line the Pendolino reached .