diff --git a/tests/test_choices.py b/tests/test_choices.py
index a503405..29dbb36 100644
--- a/tests/test_choices.py
+++ b/tests/test_choices.py
@@ -79,7 +79,7 @@ class LabelChoicesTests(ChoicesTests):
             ('DRAFT', 'is draft'),
             ('PUBLISHED', 'is published'),
             ('DELETED', 'DELETED'))
-                         )
+        )
 
     def test_indexing(self):
         self.assertEqual(self.STATUS['PUBLISHED'], 'is published')
diff --git a/tests/test_managers/test_inheritance_manager.py b/tests/test_managers/test_inheritance_manager.py
index 39c694e..7cde8d3 100644
--- a/tests/test_managers/test_inheritance_manager.py
+++ b/tests/test_managers/test_inheritance_manager.py
@@ -6,11 +6,12 @@ import django
 from django.db import models
 from django.test import TestCase
 
-from tests.models import (InheritanceManagerTestRelated, InheritanceManagerTestGrandChild1,
-                                      InheritanceManagerTestGrandChild1_2, InheritanceManagerTestParent,
-                                      InheritanceManagerTestChild1,
-                                      InheritanceManagerTestChild2, TimeFrame, InheritanceManagerTestChild3
-                                      )
+from tests.models import (
+    InheritanceManagerTestRelated, InheritanceManagerTestGrandChild1,
+    InheritanceManagerTestGrandChild1_2, InheritanceManagerTestParent,
+    InheritanceManagerTestChild1,
+    InheritanceManagerTestChild2, TimeFrame, InheritanceManagerTestChild3
+)
 
 
 class InheritanceManagerTests(TestCase):
@@ -177,27 +178,26 @@ class InheritanceManagerTests(TestCase):
 
         # No argument to select_subclasses
         objs_1 = list(
-            self.get_manager().
-                select_subclasses().
-                values_list('id')
+            self.get_manager()
+                .select_subclasses()
+                .values_list('id')
         )
 
         # String argument to select_subclasses
         objs_2 = list(
-            self.get_manager().
-                select_subclasses(
+            self.get_manager()
+            .select_subclasses(
                 "inheritancemanagertestchild2"
-            ).
-                values_list('id')
+            )
+            .values_list('id')
         )
 
         # String argument to select_subclasses
         objs_3 = list(
-            self.get_manager().
-                select_subclasses(
+            self.get_manager()
+            .select_subclasses(
                 InheritanceManagerTestChild2
-            ).
-                values_list('id')
+            ).values_list('id')
         )
 
         assert all((
diff --git a/tox.ini b/tox.ini
index c46b78a..339c671 100644
--- a/tox.ini
+++ b/tox.ini
@@ -40,3 +40,4 @@ commands =
 ignore =
     E731,  ; do not assign a lambda expression, use a def
     W503  ; line break before binary operator
+    E402  ; module level import not at top of file