diff --git a/test/sanity/pep8/current-ignore.txt b/test/sanity/pep8/current-ignore.txt
index cfdd3049dca..156cecce032 100644
--- a/test/sanity/pep8/current-ignore.txt
+++ b/test/sanity/pep8/current-ignore.txt
@@ -1,5 +1,6 @@
 E305
 E402
 W503
+W504
 E722
 E741