diff --git a/tox.ini b/tox.ini
index 846911b..4abf218 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,7 +33,7 @@ deps=
 commands=
     black --check treemodeladmin setup.py
     flake8 .
-    isort --check-only --diff --recursive treemodeladmin
+    isort --check-only --diff treemodeladmin
 
 [flake8]
 ignore=E731,W503,W504
@@ -49,7 +49,6 @@ lines_after_imports=2
 include_trailing_comma=1
 multi_line_output=3
 skip=.tox,migrations
-not_skip=__init__.py
 use_parentheses=1
 known_django=django
 known_wagtail=wagtail