diff --git a/model_clone/tests/test_clone_mixin.py b/model_clone/tests/test_clone_mixin.py
index a3982a92..2df54ee7 100644
--- a/model_clone/tests/test_clone_mixin.py
+++ b/model_clone/tests/test_clone_mixin.py
@@ -309,6 +309,9 @@ def test_cloning_without_explicit_clone_m2m_fields(self):
             list(book.authors.values_list("first_name", "last_name")),
             list(book_clone.authors.values_list("first_name", "last_name")),
         )
+        self.assertEqual(
+            len(list(book_clone.authors.values_list("first_name", "last_name"))), 0
+        )
 
     def test_cloning_with_unique_constraint_is_valid(self):
         sale_tag = SaleTag.objects.create(name="test-sale-tag")