diff --git a/tests/pytest/functions/function_derivative.py b/tests/pytest/functions/function_derivative.py
index 8b77159ffa..61a3ed72fe 100644
--- a/tests/pytest/functions/function_derivative.py
+++ b/tests/pytest/functions/function_derivative.py
@@ -63,7 +63,7 @@ class TDTestCase:
                 tdSql.checkData(3, 1, "2018-09-17 09:01:20.000")
                 tdSql.checkData(3, 3, "2018-09-17 09:01:20.000")
 
-                tdSql.query("select ts,derivative(col1, 10, 1),ts from tb1")
+                tdSql.query("select ts,derivative(col, 10, 1),ts from tb1")
                 tdSql.checkRows(2)
                 tdSql.checkData(0, 0, "2018-09-17 09:00:10.000")
                 tdSql.checkData(0, 1, "2018-09-17 09:00:10.000")