He made his first league appearance of the 2015–16 Premier League season on 19 December 2015 when he started in a 3–2 win over Everton. Wasilewski played only two league games before Leicester's Premier League trophy presentation on 7 May 2016, making him ineligible for a winner's medal (a minimum of five league games is required). Nonetheless, owing to teammate Robert Huth's suspension, Wasilewski played the final two matches of the Premier League season, taking his appearances up to four. On 14 June 2016, Wasilewski signed a one-year extension to his contract.