In this study, Feldstein-Horioka hypothesis on saving-investment relationship was tested for the period 1968-2008 in Turkey using Hansen-Seo, Gregory-Hansen and Hatemi-J models. First of all, when Feldstein-Horioka hypothesis was researched by Hansen-Seo method, the variables did not exhibit a nonlinear structure. Then, with Gregory-Hansen and Hatemi-J models, it was found that the saving-retention coefficient got a value close to 1 and 0.426 respectively. It was understood that the Feldstein-Horioka puzzle continued. The results obtained show that in testing Feldstein-Horioka hypothesis, instead of a fixed parameter assumption, applying test techniques that take endogenous structural breaks into consideration would give more reliable results.