diff --git a/tests/pytest/insert/insertJSONPayload.py b/tests/pytest/insert/insertJSONPayload.py
index ff2fcb7f9f779cd4d5faa4c841e2e4165d6e76ed..c5cd96f86d984bff09dcc3ee40405bf5c2056fea 100644
--- a/tests/pytest/insert/insertJSONPayload.py
+++ b/tests/pytest/insert/insertJSONPayload.py
@@ -35,7 +35,7 @@ class TDTestCase:
         print("============= step0 : test metric  ================")
         payload = ['''
         {
-	    "metric":	".stb.0.",
+	    "metric":	"`.stb.0.`",
 	    "timestamp":	1626006833610,
 	    "value":	10,
 	    "tags":	{