diff --git a/simpeg_drivers/electromagnetics/base_1d_driver.py b/simpeg_drivers/electromagnetics/base_1d_driver.py
index 834cdff1..35c57466 100644
--- a/simpeg_drivers/electromagnetics/base_1d_driver.py
+++ b/simpeg_drivers/electromagnetics/base_1d_driver.py
@@ -20,6 +20,7 @@
 from discretize.utils import mesh_utils
 from geoapps_utils.utils.locations import topo_drape_elevation
 from geoh5py import Workspace
+from geoh5py.objects import Surface
 from geoh5py.shared.merging.drape_model import DrapeModelMerger
 from geoh5py.ui_json.ui_json import fetch_active_workspace
 from numpy import ndarray
@@ -48,6 +49,9 @@ def __init__(self, workspace: Workspace, **kwargs):
         self.topo_z_drape = topo_drape_elevation(
             self.params.data_object.vertices,
             self.inversion_topography.locations,
+            triangulation=self.params.active_cells.topography_object.cells
+            if isinstance(self.params.active_cells.topography_object, Surface)
+            else None,
         )
 
     @property
diff --git a/tests/run_tests/driver_airborne_fem_1d_test.py b/tests/run_tests/driver_airborne_fem_1d_test.py
index 1290754f..3a4e7b31 100644
--- a/tests/run_tests/driver_airborne_fem_1d_test.py
+++ b/tests/run_tests/driver_airborne_fem_1d_test.py
@@ -38,7 +38,7 @@
 # To test the full run and validate the inversion.
 # Move this file out of the test directory and run.
 
-target_run = {"data_norm": 380.3510229653626, "phi_d": 33100, "phi_m": 209}
+target_run = {"data_norm": 381.0495293422212, "phi_d": 33400, "phi_m": 198}
 
 
 def test_fem_fwr_1d_run(