diff --git a/tox.ini b/tox.ini
index 88e4fa58a84..0784f73a3fa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -26,3 +26,10 @@ commands =
   {[testenv:black_check]commands}
   yamllint -s {toxinidir}
   flake8 {toxinidir}
+
+[flake8]
+# E123, E125 skipped as they are invalid PEP-8.
+show-source = True
+ignore = E123,E125,E203,E402,E501,E741,F401,F811,F841,W503
+max-line-length = 160
+builtins = _