diff --git a/sqlalchemy_iris/requirements.py b/sqlalchemy_iris/requirements.py
index 475216a..3bee82f 100644
--- a/sqlalchemy_iris/requirements.py
+++ b/sqlalchemy_iris/requirements.py
@@ -249,7 +249,7 @@ def empty_inserts(self):
     def insert_from_select(self):
         """target platform supports INSERT from a SELECT."""
 
-        return exclusions.open()
+        return exclusions.closed()
 
     @property
     def tuple_in(self):