diff --git a/tests/system-test/0-others/udf_create.py b/tests/system-test/0-others/udf_create.py
index ec7716fba3..ee1a0ef5b3 100644
--- a/tests/system-test/0-others/udf_create.py
+++ b/tests/system-test/0-others/udf_create.py
@@ -257,7 +257,7 @@ class TDTestCase:
 
 
         # aggregate functions
-        tdSql.query("select udf2(num1) ,udf2_dup(num2) from tb")
+        tdSql.query("select udf2(num1) ,udf2_dup(num1) from tb")
         val = tdSql.queryResult[0][0] + 100
         tdSql.checkData(0,1,val)