diff --git a/wagtail_ab_testing/test/tests/test_abtest_model.py b/wagtail_ab_testing/test/tests/test_abtest_model.py
index a8ea8cd..89bc2d6 100644
--- a/wagtail_ab_testing/test/tests/test_abtest_model.py
+++ b/wagtail_ab_testing/test/tests/test_abtest_model.py
@@ -170,8 +170,7 @@ def test_check_raise_protect_error(self):
         Test to check if ProtectedError is raised when associated revision is deleted
         """
         with self.assertRaises(ProtectedError):
-            revision = self.ab_test.variant_revision
-            revision.delete()
+            self.ab_test.variant_revision.delete()
 
 
 class TestAutoCancelOnUnpublish(TestCase):