diff --git a/test/src/test/java/cn/edu/tsinghua/iginx/integration/func/sql/SQLSessionIT.java b/test/src/test/java/cn/edu/tsinghua/iginx/integration/func/sql/SQLSessionIT.java
index 60e9721d4e..20aaab14e6 100644
--- a/test/src/test/java/cn/edu/tsinghua/iginx/integration/func/sql/SQLSessionIT.java
+++ b/test/src/test/java/cn/edu/tsinghua/iginx/integration/func/sql/SQLSessionIT.java
@@ -7071,7 +7071,7 @@ public void testMappingTransform() {
             + "Total line number = 3\n";
     executor.executeAndCompare(query, expect);
 
-    if (!isScaling) {
+    if (!isScaling && isOptimizerOpen) {
       query = "explain SELECT first(s1), last(s2), first(s3), last(s4) from us.d1;";
       expect =
           "ResultSets:\n"