diff --git a/tests/system-test/pytest.sh b/tests/system-test/pytest.sh
index a76efb62f3..dfdfc32ed0 100755
--- a/tests/system-test/pytest.sh
+++ b/tests/system-test/pytest.sh
@@ -93,7 +93,7 @@ else
     fi
     sleep 1
   done
-
+  # check case successful
   AsanFileSuccessLen=$(grep -w "successfully executed" $AsanFile | wc -l)
   echo "AsanFileSuccessLen:" $AsanFileSuccessLen