diff --git a/tox.ini b/tox.ini
index ff93c44e..0258d256 100644
--- a/tox.ini
+++ b/tox.ini
@@ -70,3 +70,4 @@ commands = bindep test
 [flake8]
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools
 show-source = True
+enable-extensions = H203,H106