diff --git a/doc/source/index.rst b/doc/source/index.rst
index f7b7b3e..336c8a7 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -90,7 +90,7 @@ LaTeX output:
 .. jupyter-execute::
 
   from IPython.display import Latex
-  Latex('\\int_{-\infty}^\infty e^{-x²}dx = \sqrt{\pi}')
+  Latex('\\int_{-\\infty}^\\infty e^{-x²}dx = \\sqrt{\\pi}')
 
 or even full-blown javascript widgets:
 
diff --git a/tests/test_execute.py b/tests/test_execute.py
index 437fc0f..dd7fc90 100644
--- a/tests/test_execute.py
+++ b/tests/test_execute.py
@@ -13,6 +13,7 @@
 from sphinx.addnodes import download_reference
 from sphinx.errors import ExtensionError
 from sphinx.testing.util import SphinxTestApp, assert_node
+
 try:
     from sphinx.testing.util import path
 except ImportError: