diff --git a/regression-test/suites/nereids_rules_p0/defer_materialize_topn/lazy_materialize_topn.groovy b/regression-test/suites/nereids_rules_p0/defer_materialize_topn/lazy_materialize_topn.groovy
index cd683b08f280f2..14bf68b4fa5dd1 100644
--- a/regression-test/suites/nereids_rules_p0/defer_materialize_topn/lazy_materialize_topn.groovy
+++ b/regression-test/suites/nereids_rules_p0/defer_materialize_topn/lazy_materialize_topn.groovy
@@ -16,7 +16,8 @@
 // under the License.
 suite("lazy_materialize_topn") {
     sql """
-        set enable_two_phase_read_opt = true
+        set enable_two_phase_read_opt = true;
+        set topn_opt_limit_threshold = 1000;
     """
 
     sql """