At my office job I have a coworker, a woman, who is in a higher position than me.

She makes me get up while I'm working to do trivial shit like get napkins from the kitchen, clean tables, vacuum etc.

Most of the time she's not even busy so it's clearly a power play on her part, to make me do things just because she can.

If I tell her "No" she'll start shit testing and bitching even harder. But is this really a shit test or just something I have to put up with because it's work?

Should I just do what I'm told or confront her?