diff --git a/activerecord/test/cases/locking_test.rb b/activerecord/test/cases/locking_test.rb
index 839bbea5bbead2c0f527adc43cd303dda2c33bc3..2e1363334d3442c26f4331959b014f703661cef1 100644
--- a/activerecord/test/cases/locking_test.rb
+++ b/activerecord/test/cases/locking_test.rb
@@ -263,6 +263,18 @@ def test_update_without_attributes_does_not_only_update_lock_version
     end
   end
 
+  def test_polymorphic_destroy_with_dependencies_and_lock_version
+    car = Car.create!
+
+    assert_difference 'car.wheels.count'  do
+      car.wheels << Wheel.create!
+    end
+    assert_difference 'car.wheels.count', -1  do
+      car.reload.destroy
+    end
+    assert car.destroyed?
+  end
+
   def test_removing_has_and_belongs_to_many_associations_upon_destroy
     p = RichPerson.create! first_name: 'Jon'
     p.treasures.create!