fix tests for Sass 3.4
fix tests for Sass 3.4

JDeuce/webassets,scorphus/webassets,glorpen/webassets,glorpen/webassets,aconrad/webassets,john2x/webassets,wijerasa/webassets,john2x/webassets,heynemann/webassets,JDeuce/webassets,aconrad/webassets,heynemann/webassets,aconrad/webassets,florianjacob/webassets,heynemann/webassets,glorpen/webassets,scorphus/webassets,florianjacob/webassets,wijerasa/webassets