def test_avseth(self):
        # Base case: gas
        # Subbing with: brine

        sub = fluidsub.avseth_fluidsub(vp=vp_gas,
                                       vs=vs_gas,
                                       rho=rho_gas,
                                       phi=phi,
                                       rhof1=rhohc,
                                       rhof2=rhow,
                                       kmin=37000000000,
                                       kf1=khc,
                                       kf2=kw)

        self.assertAlmostEqual(sub[0], vp_brine, places=-1)  # Cannot match :(
        self.assertAlmostEqual(sub[1], vs_brine, places=-1)  # Cannot match :(
        self.assertAlmostEqual(sub[2], rho_brine, places=-1)  # Cannot match :(