diff --git a/tox.ini b/tox.ini
index 5c5261549..424c91346 100644
--- a/tox.ini
+++ b/tox.ini
@@ -85,7 +85,7 @@ commands = python setup.py build_sphinx
 # E126 continuation line over-indented for hanging indent
 # E128 continuation line under-indented for visual indent
 # E129 visually indented line with same indent as next logical line
-# E265 block comment should start with ‘# ‘
+# E265 block comment should start with '# '
 # H404 multi line docstring should start with a summary
 # H405 multi line docstring summary not separated with an empty line
 # TODO(dougwig) -- uncomment this to test for remaining linkages