diff --git a/tox.ini b/tox.ini
index d6697460639..c153077318f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -201,6 +201,12 @@ commands = sphinx-build -W -b linkcheck doc/source doc/build/linkcheck
 [flake8]
 # We only enable the hacking (H) and neutron (N) checks
 select = H,N
+# 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
+# H904: Delay string interpolations at logging calls
+enable-extensions = H106,H203,H204,H205,H904
 ignore = H405,H701,H702,H703,N530
 show-source = true
 exclude = ./.*,build,dist,doc