An attractive substitute for Li-ion batteries are calcium batteries due to the abundance of calcium in the Earth's crust and the standard reduction potential of calcium that is comparable to that of lithium. However, to fully realize a working secondary calcium battery, identification and development of suitable electrodes and electrolyte is needed. The biggest challenge is how to establish reversible plating and stripping of calcium at the metal-anodeinterface. Calcium inhibition occurs in a large number of electrolytes, therefore, it is extremely important to choose an electrolyte formulation that will not lead to calcium inhibition. Within this work, electrochemical tests of calcium electrode in Ca(TFSI)2/ACN electrolyte were carried out in order to investigate the influence of Ca(TFSI)2/ACN electrolyte on the electrochemical behavior of the calcium electrode and on the reversibility of plating and stripping reactions. Testing of the calcium anode in Ca(TFSI)2/ACN electrolyte was performed using the following techniques: open circuit voltage, cyclic voltammetry and electrochemical impedance spectroscopy. By measuring the open circuit voltage, it was determined that calcium in the Ca(TFSI)2/ACN electrolyte is subject to corrosion, where the electrode is covered with an inhibiting layer. The inhibiting layer slows down the cathodic deposition of calcium due to the low permeability of calcium ions through it. Cathodic deposition of calcium is visible on cyclic voltammograms in the first cycle of potential change, but the electrode is completely inhibited in subsequent cycles. The anodic dissolution of calcium from the Ca(TFSI)2/ACN solution proceeds unhindered despite the formation of an inhibiting layer. It is possible that the dissolution of calcium breaks down the resulting layer and thus enables further dissolution.