diff --git a/packages/frontend-test-utils/api-report.md b/packages/frontend-test-utils/api-report.md
index 3b368394ca..3aa9069219 100644
--- a/packages/frontend-test-utils/api-report.md
+++ b/packages/frontend-test-utils/api-report.md
@@ -7,7 +7,10 @@
 
 import { AnalyticsApi } from '@backstage/frontend-plugin-api';
 import { AnalyticsEvent } from '@backstage/frontend-plugin-api';
+import { AppNode } from '@backstage/frontend-plugin-api';
+import { AppNodeInstance } from '@backstage/frontend-plugin-api';
 import { ErrorWithContext } from '@backstage/test-utils';
+import { ExtensionDataRef } from '@backstage/frontend-plugin-api';
 import { ExtensionDefinition } from '@backstage/frontend-plugin-api';
 import { JsonObject } from '@backstage/types';
 import { MockConfigApi } from '@backstage/test-utils';
@@ -36,6 +39,17 @@ export function createExtensionTester<TConfig>(
 
 export { ErrorWithContext };
 
+// @public (undocumented)
+export class ExtensionQuery {
+  constructor(node: AppNode);
+  // (undocumented)
+  data<T>(ref: ExtensionDataRef<T>): T | undefined;
+  // (undocumented)
+  get instance(): AppNodeInstance;
+  // (undocumented)
+  get node(): AppNode;
+}
+
 // @public (undocumented)
 export class ExtensionTester {
   // (undocumented)
@@ -46,6 +60,10 @@ export class ExtensionTester {
     },
   ): ExtensionTester;
   // (undocumented)
+  data<T>(ref: ExtensionDataRef<T>): T | undefined;
+  // (undocumented)
+  query(id: string | ExtensionDefinition<any, any>): ExtensionQuery;
+  // (undocumented)
   render(options?: { config?: JsonObject }): RenderResult;
 }
 
diff --git a/packages/frontend-test-utils/src/app/index.ts b/packages/frontend-test-utils/src/app/index.ts
index 2351561022..6c6ef26e4c 100644
--- a/packages/frontend-test-utils/src/app/index.ts
+++ b/packages/frontend-test-utils/src/app/index.ts
@@ -17,6 +17,7 @@
 export {
   createExtensionTester,
   type ExtensionTester,
+  type ExtensionQuery,
 } from './createExtensionTester';
 
 export { renderInTestApp, type TestAppOptions } from './renderInTestApp';