diff --git a/tests/python/test_ipython.ipynb b/tests/python/test_ipython.ipynb
index a895423861032..28988c259cb50 100644
--- a/tests/python/test_ipython.ipynb
+++ b/tests/python/test_ipython.ipynb
@@ -1,5 +1,5 @@
 {
- "cells": [
+  "cells": [
   {
    "cell_type": "markdown",
    "id": "51b3b00e",