def METHOD_NAME(self):
    axis = "x"
    self.slc = yt.SlicePlot(self.ds, axis, ("stream", "Density"), origin="native")
    assert self.ds.coordinates.data_projection[axis] is None
    assert self.ds.coordinates.data_transform[axis] is None
    assert self.slc._projection is None
    assert self.slc._transform is None