diff --git a/polymorphic/tests/migrations/0001_initial.py b/polymorphic/tests/migrations/0001_initial.py
index 4e51629..148b2dc 100644
--- a/polymorphic/tests/migrations/0001_initial.py
+++ b/polymorphic/tests/migrations/0001_initial.py
@@ -1118,7 +1118,6 @@ class Migration(migrations.Migration):
             ],
             options={
                 'proxy': True,
-                'indexes': [],
             },
             bases=('tests.duck',),
         ),
@@ -1128,7 +1127,6 @@ class Migration(migrations.Migration):
             ],
             options={
                 'proxy': True,
-                'indexes': [],
             },
             bases=('tests.duck',),
         ),