diff --git a/notebooks/test/test-cli.ipynb b/notebooks/test/test-cli.ipynb
index daacfb22315d6a9edadd4991c31937751e721e74..3636da9d1da1bed89988f4a7f15d027f04d22001 100644
--- a/notebooks/test/test-cli.ipynb
+++ b/notebooks/test/test-cli.ipynb
@@ -43,7 +43,9 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from pathlib import Path"
+    "from pathlib import Path\n",
+    "\n",
+    "from cal_tools.tools import latex_warning"
    ]
   },
   {
@@ -72,6 +74,28 @@
    "source": [
     "print(\"🥼\")"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Test `latex_warning` output which uses a custom `warningbox` latex command"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "latex_warning(\"This is a warning test message.\")\n",
+    "\n",
+    "# empty message\n",
+    "latex_warning(\"\")\n",
+    "\n",
+    "# special characters\n",
+    "latex_warning(\"$x < y$\")"
+   ]
   }
  ],
  "metadata": {