diff --git a/redfish-tests/test_telemetry.py b/redfish-tests/test_telemetry.py
index 36eb770..921737b 100644
--- a/redfish-tests/test_telemetry.py
+++ b/redfish-tests/test_telemetry.py
@@ -261,7 +261,7 @@
 
 
 @pytest.mark.parametrize(
-    "invalid", ["50000", "P12ST", "PT12S12", "PPP" "PD222T222H222M222.222S"]
+    "invalid", ["50000", "P12ST", "PT12S12", "PPPPD222T222H222M222.222S"]
 )
 def test_add_report_with_invalid_duration_response_bad_request(
     invalid, report_definitions