def METHOD_NAME(self):
    path = CompiledPath()
    path.move_to(-5, -5)
    path.line_to(5, 5)
    path.line_to(5, -5)
    path.line_to(-5, 5)
    path.line_to(-5, -5)
    self.scatterplot.marker = "custom"
    self.scatterplot.custom_symbol = path
    gc = PlotGraphicsContext(self.size)
    gc.render_component(self.scatterplot)
    actual = gc.bmp_array[:, :, :]
    self.assertFalse(alltrue(actual == 255))