diff --git a/tox.ini b/tox.ini
index 9eed2f0f3e..e29c2de6bf 100644
--- a/tox.ini
+++ b/tox.ini
@@ -104,7 +104,7 @@ exclude =  .venv,.git,.tox,dist,doc,*lib/python*,*egg,build
 import-order-style = pep8
 application-import-names = ironic
 max-complexity=18
-# [H106] Don’t put vim configuration in source files.
+# [H106] Don't put vim configuration in source files.
 # [H203] Use assertIs(Not)None to check for None.
 # [H204] Use assert(Not)Equal to check for equality.
 # [H205] Use assert(Greater|Less)(Equal) for comparison.