diff --git a/tests/e2e_notebooks/test_keep_metadata_keys.ipynb b/tests/e2e_notebooks/test_keep_metadata_keys.ipynb
index f546888..a3554d5 100644
--- a/tests/e2e_notebooks/test_keep_metadata_keys.ipynb
+++ b/tests/e2e_notebooks/test_keep_metadata_keys.ipynb
@@ -1,27 +1,27 @@
 {
-  "cells": [
-   {
-    "cell_type": "markdown",
-    "metadata": {
-     "scrolled": true
-    },
-    "source": [
-     "This notebook tests that using \"--keep-metadata-keys\" works as expected."
-    ]
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "scrolled": true
    },
-   {
-    "cell_type": "code",
-    "execution_count": null,
-    "metadata": {
-     "collapsed": true
-    },
-    "outputs": [],
-    "source": [
-     "1+1"
-    ]
-   }
-  ],
-  "metadata": {},
-  "nbformat": 4,
-  "nbformat_minor": 0
- }
+   "source": [
+    "This notebook tests that using \"--keep-metadata-keys\" works as expected."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "1+1"
+   ]
+  }
+ ],
+ "metadata": {},
+ "nbformat": 4,
+ "nbformat_minor": 0
+}