diff --git a/examples/jupyter/mgxs-part-ii.ipynb b/examples/jupyter/mgxs-part-ii.ipynb
index b12cc4143..b03838477 100644
--- a/examples/jupyter/mgxs-part-ii.ipynb
+++ b/examples/jupyter/mgxs-part-ii.ipynb
@@ -131,7 +131,7 @@
    "outputs": [],
    "source": [
     "# Instantiate a Materials collection\n",
-    "materials_file = openmc.Materials((fuel, water, zircaloy))\n",
+    "materials_file = openmc.Materials([fuel, water, zircaloy])\n",
     "\n",
     "# Export to \"materials.xml\"\n",
     "materials_file.export_to_xml()"
diff --git a/examples/jupyter/mgxs-part-iii.ipynb b/examples/jupyter/mgxs-part-iii.ipynb
index 65d8a069f..addca822f 100644
--- a/examples/jupyter/mgxs-part-iii.ipynb
+++ b/examples/jupyter/mgxs-part-iii.ipynb
@@ -134,7 +134,7 @@
    "outputs": [],
    "source": [
     "# Instantiate a Materials object\n",
-    "materials_file = openmc.Materials((fuel, water, zircaloy))\n",
+    "materials_file = openmc.Materials([fuel, water, zircaloy])\n",
     "\n",
     "# Export to \"materials.xml\"\n",
     "materials_file.export_to_xml()"
diff --git a/examples/jupyter/pandas-dataframes.ipynb b/examples/jupyter/pandas-dataframes.ipynb
index 8c409822e..72d5d7313 100644
--- a/examples/jupyter/pandas-dataframes.ipynb
+++ b/examples/jupyter/pandas-dataframes.ipynb
@@ -79,7 +79,7 @@
    "outputs": [],
    "source": [
     "# Instantiate a Materials collection\n",
-    "materials_file = openmc.Materials((fuel, water, zircaloy))\n",
+    "materials_file = openmc.Materials([fuel, water, zircaloy])\n",
     "\n",
     "# Export to \"materials.xml\"\n",
     "materials_file.export_to_xml()"
diff --git a/examples/jupyter/search.ipynb b/examples/jupyter/search.ipynb
index b84411e20..5c754049a 100644
--- a/examples/jupyter/search.ipynb
+++ b/examples/jupyter/search.ipynb
@@ -71,7 +71,7 @@
     "    water.add_element('B', ppm_Boron * 1E-6)\n",
     "    \n",
     "    # Instantiate a Materials object\n",
-    "    materials = openmc.Materials((fuel, zircaloy, water))\n",
+    "    materials = openmc.Materials([fuel, zircaloy, water])\n",
     "    \n",
     "    # Create cylinders for the fuel and clad\n",
     "    fuel_outer_radius = openmc.ZCylinder(R=0.39218)\n",
diff --git a/examples/jupyter/tally-arithmetic.ipynb b/examples/jupyter/tally-arithmetic.ipynb
index 1b189769d..70cabc7ef 100644
--- a/examples/jupyter/tally-arithmetic.ipynb
+++ b/examples/jupyter/tally-arithmetic.ipynb
@@ -105,7 +105,7 @@
    "outputs": [],
    "source": [
     "# Instantiate a Materials collection\n",
-    "materials_file = openmc.Materials((fuel, water, zircaloy))\n",
+    "materials_file = openmc.Materials([fuel, water, zircaloy])\n",
     "\n",
     "# Export to \"materials.xml\"\n",
     "materials_file.export_to_xml()"