diff --git a/tests/tbs/tb0627a.pp b/tests/tbs/tb0627a.pp
index 0891b1dbbf..2e1a09ffcd 100644
--- a/tests/tbs/tb0627a.pp
+++ b/tests/tbs/tb0627a.pp
@@ -1,4 +1,4 @@
-{ %OPT=-O3 }
+{ %OPT=-O- -O3 }
 
 program tb0627a;