Laboratory scale tests at service conditions are necessary to predict the behaviour of refractories during service. Due to the oxidation of the carbon there are some difficulties for testing of carbon bonded refractories at elevated temperatures. Therefore, special testing devices and setups are necessary. Tensile creep tests on a total of nine samples at three different temperatures (1150 °C, 1310 °C and 1520 °C) and different loads were performed. A cylindrical geometry with a diameter of 30 mm and a length of 230 mm was chosen for the tests. With an inverse evaluation of the tests, the Norton-Bailey creep parameters were calculated for each temperature. The reducing conditions were realised with an embedding in coke breeze. Wedge splitting tests were performed at 1150 °C, 1310 °C and 1500 °C in a gas tight furnace with continuous argon purging. The horizontal displacement was measured by a laser speckle extensometer. Different argon purging rates were tested to measure the influence on the results of the specific fracture energy and the nominal notch tensile strength. Due to argon purging rates between 10 and 80 l/h mass losses of less than 1.54 % could be realized for each testing temperature.