def METHOD_NAME(self):
    ctx = RuptureContext()
    ctx.mag = 5.
    ctx.sids = [0, 1]
    ctx.rhypo = ctx.rrup = numpy.array([150, 100])
    mean_150_100, _ = self.GSIM_CLASS().get_mean_and_stddevs(
        ctx, ctx, ctx, SA(0.1, 5), [StdDev.TOTAL])
    ctx.rhypo = numpy.array([100, 150])
    mean_100_150, _ = self.GSIM_CLASS().get_mean_and_stddevs(
        ctx, ctx, ctx, SA(0.1, 5), [StdDev.TOTAL])
    self.assertAlmostEqual(mean_150_100[1], mean_100_150[0])
    self.assertAlmostEqual(mean_150_100[0], mean_100_150[1])