@mixin test2 ($p1, $p2) { -webkit-test: $p1 $p2; -moz-test: $p1 $p2; } @mixin test3 ($p1, $p2, $p3) { -webkit-test: $p1 $p2 $p3; -moz-test: $p1 $p2 $p3; } @include test2(foo, bar); @include test3(foo, bar, zoo);