If you do not capitalize the first letter of the object constructor, and not capitalize the new object constructor (staffMember). You can pass the lesson successfully.
var staffMember = function(name,discountPercent){
this.name = name;
this.discountPercent = discountPercent;
};
var sally = new StaffMember('Sally',5);
var bob = new StaffMember('Bob',10);
var me = new staffMember('me',20);
It does throw an error, but still lets you complete that lesson.