Turkey has changed the essentials of its energy markets more than a decade ago. It was mainly a transition from a state-led model to a free-market one. Although some levels of progress is observable; security of supply, particularly in times of short term supply disruption had not been widely tested. Harsh winter conditions set a litmus test for Turkish energy markets. Basing on the this test, this paper provides an analysis of to what extent Turkey is open to the risks of energy supply security; and discusses possible measures to relieve future supply disruption risks. Energy policy-making should consider the fact that electricity and gas markets are highly intertwined in Turkey; and security of supply measures could have cross-market implications, paper concludes. (C) 2016 Elsevier Ltd. All rights reserved.