diff --git a/wechat-mp.test.mjs b/wechat-mp.test.mjs
index c380850..e5a6c62 100644
--- a/wechat-mp.test.mjs
+++ b/wechat-mp.test.mjs
@@ -2057,7 +2057,7 @@ test('wechat mp service reconciles existing dedicated session before reply', asy
         extensionsReadCount += 1;
         const extensions =
           extensionsReadCount > 1
-            ? [{ name: 'sandbox-fs', available_tools: ['list_dir'] }]
+            ? [extensionConfig]
             : [];
         return new Response(JSON.stringify({ extensions }), {
           status: 200,
@@ -2212,7 +2212,7 @@ test('wechat mp service recreates poisoned dedicated session after bare completi
     },
     sessionApiFetch: async (sessionId, pathname, init = {}) => {
       if (pathname === `/sessions/${sessionId}/extensions`) {
-        return new Response(JSON.stringify({ extensions: [{ name: 'developer', available_tools: ['write'] }] }), {
+        return new Response(JSON.stringify({ extensions: [{ type: 'platform', name: 'developer', available_tools: ['write'] }] }), {
           status: 200,
           headers: { 'Content-Type': 'application/json' },
         });
@@ -2390,7 +2390,7 @@ test('wechat mp service forwards html link when write_file created a real page w
     },
     sessionApiFetch: async (sessionId, pathname) => {
       if (pathname === `/sessions/${sessionId}/extensions`) {
-        return new Response(JSON.stringify({ extensions: [{ name: 'developer', available_tools: ['write'] }] }), {
+        return new Response(JSON.stringify({ extensions: [{ type: 'platform', name: 'developer', available_tools: ['write'] }] }), {
           status: 200,
           headers: { 'Content-Type': 'application/json' },
         });
@@ -3162,7 +3162,7 @@ test('wechat mp service recreates dedicated session when tool_calls error arrive
     },
     sessionApiFetch: async (sessionId, pathname, init = {}) => {
       if (pathname === `/sessions/${sessionId}/extensions`) {
-        return new Response(JSON.stringify({ extensions: [{ name: 'developer', available_tools: ['write'] }] }), {
+        return new Response(JSON.stringify({ extensions: [{ type: 'platform', name: 'developer', available_tools: ['write'] }] }), {
           status: 200,
           headers: { 'Content-Type': 'application/json' },
         });
@@ -3331,7 +3331,7 @@ test('wechat mp service recreates dedicated session after poisoned tool_calls hi
     },
     sessionApiFetch: async (sessionId, pathname, init = {}) => {
       if (pathname === `/sessions/${sessionId}/extensions`) {
-        return new Response(JSON.stringify({ extensions: [{ name: 'developer', available_tools: ['write'] }] }), {
+        return new Response(JSON.stringify({ extensions: [{ type: 'platform', name: 'developer', available_tools: ['write'] }] }), {
           status: 200,
           headers: { 'Content-Type': 'application/json' },
         });
@@ -3497,7 +3497,7 @@ test('wechat mp service retries poisoned publish claims before forwarding H5 ret
     },
     sessionApiFetch: async (sessionId, pathname) => {
       if (pathname === `/sessions/${sessionId}/extensions`) {
-        return new Response(JSON.stringify({ extensions: [{ name: 'developer', available_tools: ['write'] }] }), {
+        return new Response(JSON.stringify({ extensions: [{ type: 'platform', name: 'developer', available_tools: ['write'] }] }), {
           status: 200,
           headers: { 'Content-Type': 'application/json' },
         });