In September 2011, Slovak news reported that their partnership had ended.[8]
2011–2012 season: First season with Testa
In October 2011, Slovak news media reported that Csölley had teamed up with Italy's Federica Testa to compete for Slovakia.[9][10] Coached by Roberto Pelizzola in Milan, Testa/Csölley made their international debut at the Bavarian Open in February 2012 and then competed at the World Championships in March in Nice, France.[11]
In September 2013, Testa/Csölley competed at the final Olympic qualifying event, the Nebelhorn Trophy; they finished ninth and became the first alternates for the 2014 Winter Olympics. In January 2014, they placed 12th at the European Championships in Budapest, Hungary but the two missed the cut-off for the free dance in March at the World Championships in Saitama, Japan.
2014–2015 season
Paola Mezzadri joined Pelizzola as Testa/Csölley's coach.[12] They began their season with a bronze medal at the 2014 Ondrej Nepela Trophy, an ISU Challenger Series (CS) event held in early October. Later that month, making their Grand Prix debut, they placed fourth in the short dance and seventh overall at the 2014 Skate America. In November, they were awarded gold at two CS competitions, the Volvo Open Cup and Warsaw Cup.
Testa/Csölley received invitations to the 2016 Skate Canada International and 2016 Trophée de France but withdrew from both Grand Prix events on 7 July 2016[14][15] due to Testa's decision to retire from competition.[16]
After Testa's retirement, Csölley contacted Czech ice dancer Lucie Myslivečková on Skype.[17] They teamed up in late June 2016 and announced on 11 July 2016 that they would compete together for Slovakia.[16][1] During their first season together, they were coached by Roberto Pelizzola and Paola Mezzadri in Milan, Italy.[18]
Following Myslivečková's decision to retire, Csölley briefly trained with Testa.[22] On June 28, 2018, he announced his retirement from competition.[22]