Add nbval notes

Author: Tania Allard

05_SharingAnalysis.ipynb

@@ -179,6 +179,23 @@
     "Now you can commit and push to GitHub."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Also, sometimes when using nbval and notebooks with html table outputs the html/css does not really match. Make sure to add the following to cells 3 and 4 in your exploratory notebooks:\n",
+    "\n",
+    "#NBVAL_SKIP\n",
+    "\n",
+    "What if you want to check the notebooks are working instead of the cel by cell output?\n",
+    "\n",
+    "use \n",
+    "\n",
+    "```\n",
+    "$ pytest --nbval-lax <notebook>\n",
+    "```"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},