diff --git a/clients/web/src/test/integration/mcp/mcp-app-demo.test.ts b/clients/web/src/test/integration/mcp/mcp-app-demo.test.ts
index 4da5d92c..298dd43d 100644
--- a/clients/web/src/test/integration/mcp/mcp-app-demo.test.ts
+++ b/clients/web/src/test/integration/mcp/mcp-app-demo.test.ts
@@ -7,11 +7,10 @@ import {
   createTestServerInfo,
   createMcpAppDemoTool,
   createMcpAppDemoResource,
+  MCP_APP_DEMO_URI,
 } from "@modelcontextprotocol/inspector-test-server";
 import type { Tool } from "@modelcontextprotocol/sdk/types.js";
 
-const MCP_APP_DEMO_URI = "ui://demo/widget.html";
-
 /**
  * Exercises the `mcp_app_demo` preset added in #1557 end-to-end: it confirms the
  * `_meta` plumbing through the composable test server's tool/resource
diff --git a/test-servers/src/test-server-fixtures.ts b/test-servers/src/test-server-fixtures.ts
index 80874b28..fe52bc28 100644
--- a/test-servers/src/test-server-fixtures.ts
+++ b/test-servers/src/test-server-fixtures.ts
@@ -754,7 +754,8 @@ export function createArgsPrompt(
   };
 }
 
-const MCP_APP_DEMO_URI = "ui://demo/widget.html";
+/** Canonical URI for the {@link createMcpAppDemoResource} UI resource, referenced by {@link createMcpAppDemoTool}'s `_meta.ui.resourceUri`. Exported so tests can assert against it without redefining the literal. */
+export const MCP_APP_DEMO_URI = "ui://demo/widget.html";
 
 /**
  * Minimal MCP App widget that exercises the host-side UI protocol surface