Test rig combining high-frequency tribological stress and low-cycle fatigue, comprising a first test piece which is fixed to a frame and defines at least one bearing surface, a second test piece which is connected to traction means for loading the second test piece so that it bears against the or each bearing surface of the first test piece, means for heating the test pieces and means for loading the test pieces in a vibratory manner so as to carry out a fretting fatigue and low-cycle and high-cycle fatigue test, one of the test pieces comprising a portion which is in the shape of a turbine engine rotor blade root and which is inserted in a groove, the shape of which groove is substantially complementary to the other test piece so as to reproduce a turbine engine blade-disc attachment.