[1.8.x] Sorted imports with isort; refs #23860.

Backport of 0ed7d155635da9f79d4dd67e4889087d3673c6da from master

3 files changed, 7 insertions, 5 deletions

diff --git a/tests/model_inheritance/models.py b/tests/model_inheritance/models.py
index af28159757..a77ab15f70 100644
--- a/tests/model_inheritance/models.py
+++ b/tests/model_inheritance/models.py
@@ -16,6 +16,7 @@ from __future__ import unicode_literals
 from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
 
+
 #
 # Abstract base classes
 #
diff --git a/tests/model_inheritance/same_model_name/models.py b/tests/model_inheritance/same_model_name/models.py
index 307a505ee6..6b45e28dfe 100644
--- a/tests/model_inheritance/same_model_name/models.py
+++ b/tests/model_inheritance/same_model_name/models.py
@@ -5,9 +5,9 @@ requiring an %(app_label)s format string. This app tests this feature by
 redefining the Copy model from model_inheritance/models.py.
 """
 
-from django.db import models
-
 from model_inheritance.models import NamedURL
+
+from django.db import models
 from django.utils.encoding import python_2_unicode_compatible
 
 
diff --git a/tests/model_inheritance/tests.py b/tests/model_inheritance/tests.py
index 7ee7e19a12..d11f50d476 100644
--- a/tests/model_inheritance/tests.py
+++ b/tests/model_inheritance/tests.py
@@ -10,9 +10,10 @@ from django.test.utils import CaptureQueriesContext
 from django.utils import six
 
 from .models import (
-    Chef, CommonInfo, ItalianRestaurant, ParkingLot, Place, Post,
-    Restaurant, Student, Supplier, Worker, MixinModel,
-    Title, Copy, Base, SubBase, GrandParent, GrandChild)
+    Base, Chef, CommonInfo, Copy, GrandChild, GrandParent, ItalianRestaurant,
+    MixinModel, ParkingLot, Place, Post, Restaurant, Student, SubBase,
+    Supplier, Title, Worker,
+)
 
 
 class ModelInheritanceTests(TestCase):