diff --git a/notebooks/ex-gwt-uzt-2d.ipynb b/notebooks/ex-gwt-uzt-2d.ipynb
index d7a6dead..e3925195 100644
--- a/notebooks/ex-gwt-uzt-2d.ipynb
+++ b/notebooks/ex-gwt-uzt-2d.ipynb
@@ -561,7 +561,6 @@
     "            thti=thti,\n",
     "            thtr=thtr,\n",
     "            finf=finf_mfnwt,\n",
-    "            nwt_11_fmt=True,\n",
     "            specifythti=True,\n",
     "            specifythtr=True,\n",
     "        )\n",
@@ -1295,6 +1294,9 @@
    "cell_metadata_filter": "-all",
    "main_language": "python",
    "notebook_metadata_filter": "-all"
+  },
+  "language_info": {
+   "name": "python"
   }
  },
  "nbformat": 4,
diff --git a/scripts/ex-gwt-uzt-2d.py b/scripts/ex-gwt-uzt-2d.py
index ce405363..e0f49988 100644
--- a/scripts/ex-gwt-uzt-2d.py
+++ b/scripts/ex-gwt-uzt-2d.py
@@ -350,7 +350,6 @@ def build_model(
             thti=thti,
             thtr=thtr,
             finf=finf_mfnwt,
-            nwt_11_fmt=True,
             specifythti=True,
             specifythtr=True,
         )