diff --git a/sample_project/database/test_project.sqlite b/sample_project/database/test_project.sqlite
index 4efba75..d439e4a 100644
Binary files a/sample_project/database/test_project.sqlite and b/sample_project/database/test_project.sqlite differ
diff --git a/sample_project/samples/migrations/0002_auto_20180319_2117.py b/sample_project/samples/migrations/0002_auto_20180319_2117.py
new file mode 100644
index 0000000..0bf0847
--- /dev/null
+++ b/sample_project/samples/migrations/0002_auto_20180319_2117.py
@@ -0,0 +1,29 @@
+# Generated by Django 2.0 on 2018-03-20 01:17
+
+from django.db import migrations, models
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('samples', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='TestNonAutoFieldModel',
+            fields=[
+                ('id', models.UUIDField(default=uuid.uuid4, editable=False, primary_key=True, serialize=False)),
+                ('order', models.PositiveIntegerField(db_index=True, editable=False)),
+            ],
+            options={
+                'ordering': ['order'],
+            },
+        ),
+        migrations.AlterField(
+            model_name='category',
+            name='order',
+            field=models.PositiveIntegerField(default=0, editable=False),
+        ),
+    ]
diff --git a/sample_project/samples/models.py b/sample_project/samples/models.py
index 81a56d4..35b2611 100644
--- a/sample_project/samples/models.py
+++ b/sample_project/samples/models.py
@@ -1,3 +1,5 @@
+import uuid
+
 from django.contrib.contenttypes.fields import GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
 from django.db import models
@@ -249,3 +251,12 @@ class BackwardCompatibleWidget(Sortable, SimpleModel):
 
     def __str__(self):
         return self.title
+
+
+@python_2_unicode_compatible
+class TestNonAutoFieldModel(SortableMixin):
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    order = models.PositiveIntegerField(editable=False, db_index=True)
+
+    class Meta:
+        ordering = ['order']
diff --git a/sample_project/samples/tests.py b/sample_project/samples/tests.py
index 60715f5..4fb1442 100644
--- a/sample_project/samples/tests.py
+++ b/sample_project/samples/tests.py
@@ -4,7 +4,6 @@ except ImportError:
     import http.client as httplib  # Python 3
 
 import json
-import uuid
 
 import django
 
@@ -15,27 +14,7 @@ from django.test.client import Client
 
 from adminsortable.models import SortableMixin
 from adminsortable.utils import get_is_sortable
-from .models import Category, Person, Project
-
-
-class TestSortableModel(SortableMixin):
-    title = models.CharField(max_length=100)
-
-    order = models.PositiveIntegerField(default=0, editable=False)
-
-    class Meta:
-        ordering = ['order']
-
-    def __unicode__(self):
-        return self.title
-
-
-class TestNonAutoFieldModel(SortableMixin):
-    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
-    order = models.PositiveIntegerField(editable=False, db_index=True)
-
-    class Meta:
-        ordering = ['order']
+from .models import Category, Person, Project, TestNonAutoFieldModel
 
 
 class SortableTestCase(TestCase):