diff --git a/.changeset/sweet-cows-clean.md b/.changeset/sweet-cows-clean.md
new file mode 100644
index 0000000000..fa2004186e
--- /dev/null
+++ b/.changeset/sweet-cows-clean.md
@@ -0,0 +1,5 @@
+---
+'@backstage/frontend-test-utils': patch
+---
+
+Added the ability to provide additional `extensions` and `features` to `renderInTestApp`
diff --git a/packages/frontend-test-utils/api-report.md b/packages/frontend-test-utils/api-report.md
index 31e293e434..ba4b8aae2b 100644
--- a/packages/frontend-test-utils/api-report.md
+++ b/packages/frontend-test-utils/api-report.md
@@ -14,6 +14,7 @@ import { ErrorWithContext } from '@backstage/test-utils';
 import { ExtensionDataRef } from '@backstage/frontend-plugin-api';
 import { ExtensionDefinition } from '@backstage/frontend-plugin-api';
 import { ExtensionDefinitionParameters } from '@backstage/frontend-plugin-api';
+import { FrontendFeature } from '@backstage/frontend-plugin-api';
 import { JsonObject } from '@backstage/types';
 import { MockConfigApi } from '@backstage/test-utils';
 import { MockErrorApi } from '@backstage/test-utils';
@@ -134,6 +135,8 @@ export type TestAppOptions = {
     [path: string]: RouteRef;
   };
   config?: JsonObject;
+  extensions?: ExtensionDefinition<any>[];
+  features?: FrontendFeature[];
 };
 
 export { withLogCollector };
diff --git a/packages/frontend-test-utils/src/app/renderInTestApp.tsx b/packages/frontend-test-utils/src/app/renderInTestApp.tsx
index a9275071b4..cc919f3f3d 100644
--- a/packages/frontend-test-utils/src/app/renderInTestApp.tsx
+++ b/packages/frontend-test-utils/src/app/renderInTestApp.tsx
@@ -31,6 +31,7 @@ import {
   IconComponent,
   RouterBlueprint,
   NavItemBlueprint,
+  FrontendFeature,
 } from '@backstage/frontend-plugin-api';
 
 /**
@@ -60,6 +61,16 @@ export type TestAppOptions = {
    * Additional configuration passed to the app when rendering elements inside it.
    */
   config?: JsonObject;
+
+  /**
+   * Additional extensions to add to the test app.
+   */
+  extensions?: ExtensionDefinition<any>[];
+
+  /**
+   * Additional features to add to the test app.
+   */
+  features?: FrontendFeature[];
 };
 
 const NavItem = (props: {
@@ -167,12 +178,22 @@ export function renderInTestApp(
     }
   }
 
+  if (options?.extensions) {
+    extensions.push(...options.extensions);
+  }
+
+  const features: FrontendFeature[] = [
+    createExtensionOverrides({
+      extensions,
+    }),
+  ];
+
+  if (options?.features) {
+    features.push(...options.features);
+  }
+
   const app = createSpecializedApp({
-    features: [
-      createExtensionOverrides({
-        extensions,
-      }),
-    ],
+    features,
     config: ConfigReader.fromConfigs([
       { context: 'render-config', data: options?.config ?? {} },
     ]),