//Box-sizing

html {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;

            @include old-ie-8 {
                background:#f00;
            }
}

* {

    &,
    &:before,
    &:after {
        -webkit-box-sizing: inherit;
           -moz-box-sizing: inherit;
                box-sizing: inherit;
        }

}
//Box-sizing

html {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}

* {

    &,
    &:before,
    &:after {
        -webkit-box-sizing: inherit;
           -moz-box-sizing: inherit;
                box-sizing: inherit;
        }

}
Remove ie8 mixin used for testing
fix: Remove ie8 mixin used for testing
