diff --git a/lib/spack/docs/conf.py b/lib/spack/docs/conf.py
index b23e3659600..95549e3b1eb 100644
--- a/lib/spack/docs/conf.py
+++ b/lib/spack/docs/conf.py
@@ -1,3 +1,4 @@
+# flake8: noqa
 ##############################################################################
 # Copyright (c) 2013, Lawrence Livermore National Security, LLC.
 # Produced at the Lawrence Livermore National Laboratory.