diff --git a/packages/frontend-plugin-api/src/extensions/ApiBlueprint.test.ts b/packages/frontend-plugin-api/src/extensions/ApiBlueprint.test.ts
index c85c021c08..f070956e96 100644
--- a/packages/frontend-plugin-api/src/extensions/ApiBlueprint.test.ts
+++ b/packages/frontend-plugin-api/src/extensions/ApiBlueprint.test.ts
@@ -49,6 +49,7 @@ describe('ApiBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
@@ -121,6 +122,7 @@ describe('ApiBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/AppRootElementBlueprint.test.tsx b/packages/frontend-plugin-api/src/extensions/AppRootElementBlueprint.test.tsx
index d9c7d296cc..3fb8d7b37a 100644
--- a/packages/frontend-plugin-api/src/extensions/AppRootElementBlueprint.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/AppRootElementBlueprint.test.tsx
@@ -40,6 +40,7 @@ describe('AppRootElementBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.test.tsx b/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.test.tsx
index b67fc3664d..2ff46f0785 100644
--- a/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.test.tsx
@@ -23,7 +23,6 @@ import {
   createExtension,
   createExtensionInput,
 } from '../wiring';
-import { each } from 'lodash';
 
 describe('AppRootWrapperBlueprint', () => {
   it('should return an extension with sensible defaults', () => {
@@ -38,7 +37,7 @@ describe('AppRootWrapperBlueprint', () => {
         "$$type": "@backstage/ExtensionDefinition",
         "attachTo": {
           "id": "app/root",
-          "input": "elements",
+          "input": "wrappers",
         },
         "configSchema": undefined,
         "disabled": false,
@@ -50,6 +49,7 @@ describe('AppRootWrapperBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.tsx b/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.tsx
index 5bcbaa49bd..4e8cab8f1b 100644
--- a/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.tsx
+++ b/packages/frontend-plugin-api/src/extensions/AppRootWrapperBlueprint.tsx
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 import React from 'react';
 import { ComponentType, PropsWithChildren } from 'react';
 import { createExtensionBlueprint } from '../wiring';
@@ -20,7 +21,7 @@ import { createAppRootWrapperExtension } from './createAppRootWrapperExtension';
 
 export const AppRootWrapperBlueprint = createExtensionBlueprint({
   kind: 'app-root-wrapper',
-  attachTo: { id: 'app/root', input: 'elements' },
+  attachTo: { id: 'app/root', input: 'wrappers' },
   output: [createAppRootWrapperExtension.componentDataRef],
   dataRefs: {
     component: createAppRootWrapperExtension.componentDataRef,
diff --git a/packages/frontend-plugin-api/src/extensions/NavItemBlueprint.test.tsx b/packages/frontend-plugin-api/src/extensions/NavItemBlueprint.test.tsx
index ba7643eee7..90c9cdf9b4 100644
--- a/packages/frontend-plugin-api/src/extensions/NavItemBlueprint.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/NavItemBlueprint.test.tsx
@@ -60,6 +60,7 @@ describe('NavItemBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/NavLogoBlueprint.test.tsx b/packages/frontend-plugin-api/src/extensions/NavLogoBlueprint.test.tsx
index fa01862785..4a96475cf5 100644
--- a/packages/frontend-plugin-api/src/extensions/NavLogoBlueprint.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/NavLogoBlueprint.test.tsx
@@ -43,6 +43,7 @@ describe('NavLogoBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/PageBlueprint.test.tsx b/packages/frontend-plugin-api/src/extensions/PageBlueprint.test.tsx
index 5e1d6b7601..c1350b3ddb 100644
--- a/packages/frontend-plugin-api/src/extensions/PageBlueprint.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/PageBlueprint.test.tsx
@@ -76,6 +76,7 @@ describe('PageBlueprint', () => {
             "toString": [Function],
           },
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/RouterBlueprint.test.tsx b/packages/frontend-plugin-api/src/extensions/RouterBlueprint.test.tsx
index ba4123138f..018c3fc570 100644
--- a/packages/frontend-plugin-api/src/extensions/RouterBlueprint.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/RouterBlueprint.test.tsx
@@ -52,6 +52,7 @@ describe('RouterBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/SignInPageBlueprint.test.tsx b/packages/frontend-plugin-api/src/extensions/SignInPageBlueprint.test.tsx
index 5ffdd3175b..f97798a64c 100644
--- a/packages/frontend-plugin-api/src/extensions/SignInPageBlueprint.test.tsx
+++ b/packages/frontend-plugin-api/src/extensions/SignInPageBlueprint.test.tsx
@@ -13,10 +13,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 import React from 'react';
 import { SignInPageBlueprint } from './SignInPageBlueprint';
 import { createExtensionTester } from '@backstage/frontend-test-utils';
-import { waitFor } from '@testing-library/react';
+import { screen, waitFor } from '@testing-library/react';
+import { coreExtensionData, createExtension } from '../wiring';
 
 describe('SignInPageBlueprint', () => {
   it('should create an extension with sensible defaults', () => {
@@ -41,6 +43,7 @@ describe('SignInPageBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
@@ -51,17 +54,29 @@ describe('SignInPageBlueprint', () => {
     const MockSignInPage = () => <div data-testid="mock-sign-in" />;
 
     const extension = SignInPageBlueprint.make({
+      name: 'test',
       params: { loader: async () => () => <MockSignInPage /> },
     });
 
     const tester = createExtensionTester(extension);
+
     expect(tester.data(SignInPageBlueprint.dataRefs.component)).toBeDefined();
 
-    const { getByTestId } = tester.render();
+    createExtensionTester(
+      createExtension({
+        name: 'dummy',
+        attachTo: { id: 'ignored', input: 'ignored' },
+        output: {
+          element: coreExtensionData.reactElement,
+        },
+        factory: () => ({ element: <div /> }),
+      }),
+    )
+      .add(extension)
+      .render();
 
-    // todo(blam): need a better way to test this, currently fails.
     await waitFor(() => {
-      expect(getByTestId('mock-sign-in')).toBeInTheDocument();
+      expect(screen.getByTestId('mock-sign-in')).toBeInTheDocument();
     });
   });
 });
diff --git a/packages/frontend-plugin-api/src/extensions/ThemeBlueprint.test.ts b/packages/frontend-plugin-api/src/extensions/ThemeBlueprint.test.ts
index 5bc3a8f7c3..92acd8eeba 100644
--- a/packages/frontend-plugin-api/src/extensions/ThemeBlueprint.test.ts
+++ b/packages/frontend-plugin-api/src/extensions/ThemeBlueprint.test.ts
@@ -44,6 +44,7 @@ describe('ThemeBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }
diff --git a/packages/frontend-plugin-api/src/extensions/TranslationBlueprint.test.ts b/packages/frontend-plugin-api/src/extensions/TranslationBlueprint.test.ts
index a059189044..e2a979c097 100644
--- a/packages/frontend-plugin-api/src/extensions/TranslationBlueprint.test.ts
+++ b/packages/frontend-plugin-api/src/extensions/TranslationBlueprint.test.ts
@@ -60,6 +60,7 @@ describe('TranslationBlueprint', () => {
         "output": [
           [Function],
         ],
+        "override": [Function],
         "toString": [Function],
         "version": "v2",
       }