<P> Since 1979 / 80 , all Test cricket has been played with six balls per over . However , overs in Test cricket originally had four balls per over , and there have been varying numbers of balls per over around the world up to 1979 / 80 , generally the same as the number of balls per over in force in other first - class cricket in that country . </P>
when did cricket go to 6 ball overs
Since 1979 / 80