Tighten test for updating labels by changing number of slices.
Tighten test for updating labels by changing number of slices.

danmane/plottable,onaio/plottable,onaio/plottable,gdseller/plottable,onaio/plottable,palantir/plottable,RobertoMalatesta/plottable,softwords/plottable,RobertoMalatesta/plottable,danmane/plottable,softwords/plottable,iobeam/plottable,palantir/plottable,NextTuesday/plottable,jacqt/plottable,alyssaq/plottable,RobertoMalatesta/plottable,gdseller/plottable,NextTuesday/plottable,palantir/plottable,softwords/plottable,alyssaq/plottable,NextTuesday/plottable,palantir/plottable,iobeam/plottable,gdseller/plottable,jacqt/plottable,danmane/plottable,alyssaq/plottable,iobeam/plottable,jacqt/plottable