diff --git a/tox.ini b/tox.ini
index 4294cbb..3cf4494 100644
--- a/tox.ini
+++ b/tox.ini
@@ -54,6 +54,6 @@ multi_line_output=3
 skip=.tox,migrations
 use_parentheses=1
 known_django=django
-known_future_library=future,six
+known_future_library=future
 default_section=THIRDPARTY
 sections=FUTURE,STDLIB,DJANGO,THIRDPARTY,FIRSTPARTY,LOCALFOLDER