diff --git a/docs/getting-started/writing-tests/writing-tests-for-ale-drivers.ipynb b/docs/getting-started/writing-tests/writing-tests-for-ale-drivers.ipynb
index 75ba39ef6208f761e2d7241dc794252363fe59c7..dc0faa776e4a92ef164349ccb208e2caab4c7384 100644
--- a/docs/getting-started/writing-tests/writing-tests-for-ale-drivers.ipynb
+++ b/docs/getting-started/writing-tests/writing-tests-for-ale-drivers.ipynb
@@ -30,6 +30,14 @@
     "### Create and Spiceinit a Cube\n",
     "\n",
     "After downloading image data, it is necessary to convert the image to ISIS cube format and spiceinit the data. The following command will convert and spiceinit an LRO NAC image, but the specific \"2isis\" command is mission-specific.  Unlike other code segments in this notebook, these commands should be run in a terminal.\n",
+    "\n",
+    "<div class=\"admonition warning\">\n",
+    "    <p class=\"admonition-title\">Create the Truth Data with ISIS!</p>\n",
+    "    <p> This cub file will be used as truth data, so it should be spiceinitted using ISIS camera models rather than the ALE driver.  You should <em>deactivate</em> your ALE environment when spiceinitting this cube!\n",
+    "    </p>\n",
+    "</div>\n",
+    "\n",
+    "\n",
     "``` BASH\n",
     "lronac2isis from=M1435111335LE.IMG to=M1435111335LE.cub\n",
     "spiceinit from=M1435111335LE.cub\n",