diff --git a/tests/system-test/99-TDcase/TD-15517.py b/tests/system-test/99-TDcase/TD-15517.py
index e7837ba009..44a64421d3 100644
--- a/tests/system-test/99-TDcase/TD-15517.py
+++ b/tests/system-test/99-TDcase/TD-15517.py
@@ -251,7 +251,7 @@ class TDTestCase:
         # wait db ready
         while 1:
             tdSql.query("show databases")
-            if tdSql.getRows() == 3: 
+            if tdSql.getRows() == 4: 
                 print (tdSql.getData(0,0), tdSql.getData(1,0),tdSql.getData(2,0),)           
                 break
             else: