diff --git a/sqlalchemy_iris/base.py b/sqlalchemy_iris/base.py
index 5410022..60e02d3 100644
--- a/sqlalchemy_iris/base.py
+++ b/sqlalchemy_iris/base.py
@@ -915,7 +915,8 @@ def on_connect(conn):
                 )
             else:
                 try:
-                    conn.execute(text("SELECT TO_VECTOR('1,2,3', INT, 3)"))
+                    with conn.cursor() as cursor:
+                        cursor.execute(text("SELECT TO_VECTOR('1,2,3', INT, 3)"))
                     self.supports_vectors = True
                 except:  # noqa
                     self.supports_vectors = False