diff --git a/website/src/pages/can-i-use/scenario-tiers.ts b/website/src/pages/can-i-use/scenario-tiers.ts
index 1a948d0af3..355fb7e9a0 100644
--- a/website/src/pages/can-i-use/scenario-tiers.ts
+++ b/website/src/pages/can-i-use/scenario-tiers.ts
@@ -135,6 +135,10 @@ export const scenarioTiers = {
       "Encode_Duration_Query_floatMillisecondsLargerUnit",
       "Encode_Duration_Header_floatSecondsLargerUnit",
       "Encode_Duration_Header_floatMillisecondsLargerUnit",
+
+      // Payload XML with namespace — XML namespace support is not required for all languages
+      "Payload_Xml_ModelWithNamespaceValue_*",
+      "Payload_Xml_ModelWithNamespaceOnPropertiesValue_*",
     ],
   },
 };