diff --git a/tests/testapp/models/custom_methods.py b/tests/testapp/models/custom_methods.py
index 07b8e02e25..9f19314991 100644
--- a/tests/testapp/models/custom_methods.py
+++ b/tests/testapp/models/custom_methods.py
@@ -48,6 +48,8 @@ class Article(meta.Model):
             FROM custom_methods_articles
             WHERE pub_date = %s
                 AND id != %s""", [str(self.pub_date), self.id])
+        # The asterisk in "Article(*row)" tells Python to expand the list into
+        # positional arguments to Article().
         return [Article(*row) for row in cursor.fetchall()]
 
 API_TESTS = """