diff --git a/tox.ini b/tox.ini
index 8ae6157..0e141c0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,3 +29,5 @@ commands = {posargs}
 [flake8]
 exclude = .venv,.tox,dist,doc,*.egg
 show-source = true
+# H904: Delay string interpolations at logging calls
+enable-extensions = H904