diff --git a/tox.ini b/tox.ini
index 73840a0..d4c505a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,3 +1,15 @@
+# The flake8 and pep8 sections just contain configuration for corresponding tools.
+# Checkers are not run implicitly.
+[flake8]
+exclude = *.egg*,.env,.git,.hg,.tox,_*,build*,dist*,venv*
+ignore = E261
+max-line-length = 101
+
+[pep8]
+exclude = *.egg*,.env,.git,.hg,.tox,_*,build*,dist*,venv*
+ignore = E261
+max-line-length = 101
+
 [tox]
 envlist = py25selects,py25poll,py26selects,py26poll,py26epolls,py27selects,py27poll,py27epolls