diff --git a/gneiss/tests/test_summary.py b/gneiss/tests/test_summary.py
index 5dcce3b..dd47148 100644
--- a/gneiss/tests/test_summary.py
+++ b/gneiss/tests/test_summary.py
@@ -1,5 +1,4 @@
-
-#!/usr/bin/env python
+# !/usr/bin/env python
 
 # ----------------------------------------------------------------------------
 # Copyright (c) 2016--, gneiss development team.