In Test cricket, injured batters are not permitted to have another player as a runner. The rule is stated in condition 25.5 of the International Cricket Council's Men's Test Playing Conditions. The only scenario where a batter is allowed to be replaced is if a batter is deemed to have or potentially have concussion. The runner would position themselves at square leg when the injured batter was on strike. When the injured batter was not on strike, the runner stood at the non-striker's end.