diff --git a/tox.ini b/tox.ini
index e699b28..71025d1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -71,6 +71,6 @@
     flake8 {posargs}
 
 [flake8]
-ignore = E123, E133, E731
+ignore = E123, E133
 show-source = True
 exclude = .git,.tox,dist,*egg,testing,src/postorius/doc