diff --git a/AHFinderDirect/test/find_1_horizon.par b/AHFinderDirect/test/find_1_horizon.par
index 01a73006..f8d927c8 100644
--- a/AHFinderDirect/test/find_1_horizon.par
+++ b/AHFinderDirect/test/find_1_horizon.par
@@ -101,7 +101,7 @@ AHFinderDirect::max_Newton_iterations__initial           = 50
 AHFinderDirect::max_Newton_iterations__subsequent        = 50
 AHFinderDirect::max_allowable_Theta_growth_iterations    = 10
 AHFinderDirect::max_allowable_Theta_nonshrink_iterations = 10
-AHFinderDirect::geometry_interpolator_name               = "Lagrange polynomial interpolation"
+AHFinderDirect::geometry_interpolator_name               = "CarpetX"
 AHFinderDirect::geometry_interpolator_pars = "order=4 boundary_off_centering_tolerance={1.0e-10 1.0e-10 1.0e-10 1.0e-10 1.0e-10 1.0e-10} boundary_extrapolation_tolerance={0.0 0.0 0.0 0.0 0.0 0.0}"
 AHFinderDirect::surface_interpolator_name                = "Lagrange polynomial interpolation"
 AHFinderDirect::surface_interpolator_pars                = "order=3"