diff --git a/docs/source/notebooks/climex.ipynb b/docs/source/notebooks/climex.ipynb
index 9429ca96..1dbcd418 100644
--- a/docs/source/notebooks/climex.ipynb
+++ b/docs/source/notebooks/climex.ipynb
@@ -112,9 +112,11 @@
     "from IPython.display import HTML, Markdown\n",
     "from xclim import ensembles as xens\n",
     "\n",
-    "cat = intake.open_esm_datastore(\n",
-    "    \"https://pavics.ouranos.ca/catalog/climex.json\"\n",
-    ")  # TEST_USE_PROD_DATA\n",
+    "# fmt: off\n",
+    "climex = \"https://pavics.ouranos.ca/catalog/climex.json\"  # TEST_USE_PROD_DATA\n",
+    "cat = intake.open_esm_datastore(climex)\n",
+    "# fmt: on\n",
+    "\n",
     "cat.df.head()"
    ]
   },