Test cricket is the longest form of the sport of cricket and is considered its highest standard. Test matches are played between national representative teams with "Test status", as determined and conferred by the International Cricket Council (ICC). The two teams of 11 players each play a four-innings match, which may last up to five days. It is generally considered the most complete examination of teams' playing ability and endurance. The name Test stems from the long, gruelling match being both mentally and physically testing.