diff --git a/.changeset/fix-test-route-matching.md b/.changeset/fix-test-route-matching.md
new file mode 100644
index 0000000000..c8adb6f8d5
--- /dev/null
+++ b/.changeset/fix-test-route-matching.md
@@ -0,0 +1,5 @@
+---
+'@backstage/frontend-test-utils': patch
+---
+
+Added a `mountPath` option to `renderInTestApp` that controls the route path pattern the test element is rendered at. When set, the element is wrapped in a `<Route>` with the given path, enabling `useParams()` to extract route parameters from the URL. Use together with `initialRouteEntries` to set a concrete URL that matches the pattern. This is useful for testing page components that depend on URL parameters, such as entity pages that use `useRouteRefParams`.
diff --git a/packages/frontend-test-utils/report.api.md b/packages/frontend-test-utils/report.api.md
index d24046953f..309d304fe1 100644
--- a/packages/frontend-test-utils/report.api.md
+++ b/packages/frontend-test-utils/report.api.md
@@ -478,6 +478,7 @@ export type TestAppOptions<TApiPairs extends any[] = any[]> = {
   };
   config?: JsonObject;
   features?: FrontendFeature[];
+  mountPath?: string;
   initialRouteEntries?: string[];
   apis?: readonly [...TestApiPairs<TApiPairs>];
 };
diff --git a/packages/frontend-test-utils/src/app/renderInTestApp.tsx b/packages/frontend-test-utils/src/app/renderInTestApp.tsx
index d599bdca01..ada78a35a3 100644
--- a/packages/frontend-test-utils/src/app/renderInTestApp.tsx
+++ b/packages/frontend-test-utils/src/app/renderInTestApp.tsx
@@ -15,7 +15,7 @@
  */
 
 import { Fragment } from 'react';
-import { MemoryRouter } from 'react-router-dom';
+import { MemoryRouter, Route, Routes } from 'react-router-dom';
 import { prepareSpecializedApp } from '@backstage/frontend-app-api';
 import { RenderResult, render } from '@testing-library/react';
 import { ConfigReader } from '@backstage/config';
@@ -79,6 +79,24 @@ export type TestAppOptions<TApiPairs extends any[] = any[]> = {
    */
   features?: FrontendFeature[];
 
+  /**
+   * The route path pattern that the test element is rendered at. When set,
+   * the element is wrapped in a `<Route>` with this path, enabling
+   * `useParams()` to extract parameters from the URL.
+   *
+   * Should be used together with `initialRouteEntries` to set a concrete
+   * URL that matches the pattern.
+   *
+   * @example
+   * ```ts
+   * renderInTestApp(<EntityPage />, {
+   *   mountPath: '/catalog/:namespace/:kind/:name',
+   *   initialRouteEntries: ['/catalog/default/component/my-entity'],
+   * })
+   * ```
+   */
+  mountPath?: string;
+
   /**
    * Initial route entries to use for the router.
    */
@@ -125,12 +143,28 @@ export function renderInTestApp<const TApiPairs extends any[] = any[]>(
   element: JSX.Element,
   options?: TestAppOptions<TApiPairs>,
 ): RenderResult {
+  const mountPath = options?.mountPath;
+
   const extensions: Array<ExtensionDefinition> = [
     createExtension({
       attachTo: { id: 'app/root', input: 'children' },
       output: [coreExtensionData.reactElement],
       factory: () => {
-        return [coreExtensionData.reactElement(element)];
+        let content: JSX.Element = element;
+
+        if (mountPath) {
+          const routePath =
+            mountPath === '/' || mountPath.endsWith('/*')
+              ? mountPath
+              : `${mountPath.replace(/\/$/, '')}/*`;
+          content = (
+            <Routes>
+              <Route path={routePath} element={content} />
+            </Routes>
+          );
+        }
+
+        return [coreExtensionData.reactElement(content)];
       },
     }),
   ];
diff --git a/plugins/catalog/src/alpha/pages.test.tsx b/plugins/catalog/src/alpha/pages.test.tsx
index 239f286515..6807817967 100644
--- a/plugins/catalog/src/alpha/pages.test.tsx
+++ b/plugins/catalog/src/alpha/pages.test.tsx
@@ -28,7 +28,6 @@ import {
 } from '@backstage/plugin-catalog-react/alpha';
 import { catalogApiMock } from '@backstage/plugin-catalog-react/testUtils';
 import {
-  catalogApiRef,
   entityRouteRef,
   MockStarredEntitiesApi,
   starredEntitiesApiRef,
@@ -40,7 +39,7 @@ import { Entity } from '@backstage/catalog-model';
 jest.setTimeout(30_000);
 
 describe('Entity page', () => {
-  const entityMock = {
+  const entityMock: Entity = {
     metadata: {
       namespace: 'default',
       annotations: {
@@ -108,9 +107,9 @@ describe('Entity page', () => {
     ],
   };
 
-  const mockCatalogApi = catalogApiMock.mock({
-    getEntityByRef: async () => entityMock,
-  });
+  const entityPath = '/catalog/default/component/artist-lookup';
+
+  const mockCatalogApi = catalogApiMock({ entities: [entityMock] });
 
   const mockStarredEntitiesApi = new MockStarredEntitiesApi();
 
@@ -152,10 +151,9 @@ describe('Entity page', () => {
         .add(apidocsEntityContent);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -175,11 +173,11 @@ describe('Entity page', () => {
 
       await expect(
         screen.findByRole('button', { name: /TechDocs/ }),
-      ).resolves.toHaveAttribute('href', '/techdocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/techdocs`);
 
       await expect(
         screen.findByRole('button', { name: /ApiDocs/ }),
-      ).resolves.toHaveAttribute('href', '/apidocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/apidocs`);
     });
 
     it('Should rename a default group', async () => {
@@ -199,10 +197,9 @@ describe('Entity page', () => {
         .add(apidocsEntityContent);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -220,11 +217,11 @@ describe('Entity page', () => {
 
       await expect(
         screen.findByRole('button', { name: /TechDocs/ }),
-      ).resolves.toHaveAttribute('href', '/techdocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/techdocs`);
 
       await expect(
         screen.findByRole('button', { name: /ApiDocs/ }),
-      ).resolves.toHaveAttribute('href', '/apidocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/apidocs`);
     });
 
     it('Should disassociate a content with a default group', async () => {
@@ -239,10 +236,9 @@ describe('Entity page', () => {
         });
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -292,10 +288,9 @@ describe('Entity page', () => {
         });
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -313,11 +308,11 @@ describe('Entity page', () => {
 
       await expect(
         screen.findByRole('button', { name: /TechDocs/ }),
-      ).resolves.toHaveAttribute('href', '/techdocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/techdocs`);
 
       await expect(
         screen.findByRole('button', { name: /ApiDocs/ }),
-      ).resolves.toHaveAttribute('href', '/apidocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/apidocs`);
     });
 
     it('Should render a single-content groups as a normal tab', async () => {
@@ -333,10 +328,9 @@ describe('Entity page', () => {
         });
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -367,10 +361,9 @@ describe('Entity page', () => {
         .add(overviewEntityContent);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -413,10 +406,9 @@ describe('Entity page', () => {
         .add(apidocsEntityContent);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -434,11 +426,11 @@ describe('Entity page', () => {
 
       await expect(
         screen.findByRole('button', { name: /TechDocs/ }),
-      ).resolves.toHaveAttribute('href', '/techdocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/techdocs`);
 
       await expect(
         screen.findByRole('button', { name: /ApiDocs/ }),
-      ).resolves.toHaveAttribute('href', '/apidocs');
+      ).resolves.toHaveAttribute('href', `${entityPath}/apidocs`);
     });
 
     it('Should sort content by title by default', async () => {
@@ -449,10 +441,9 @@ describe('Entity page', () => {
         .add(apidocsEntityContent);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -490,10 +481,9 @@ describe('Entity page', () => {
         .add(apidocsEntityContent);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -539,10 +529,9 @@ describe('Entity page', () => {
         .add(apidocsEntityContent);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -588,10 +577,9 @@ describe('Entity page', () => {
         });
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -625,10 +613,9 @@ describe('Entity page', () => {
       );
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -664,10 +651,9 @@ describe('Entity page', () => {
       ).add(customEntityHeader);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -723,10 +709,9 @@ describe('Entity page', () => {
       ).add(menuItem);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -778,10 +763,9 @@ describe('Entity page', () => {
       ).add(menuItem);
 
       await renderInTestApp(tester.reactElement(), {
-        apis: [
-          [catalogApiRef, mockCatalogApi],
-          [starredEntitiesApiRef, mockStarredEntitiesApi],
-        ],
+        apis: [mockCatalogApi, [starredEntitiesApiRef, mockStarredEntitiesApi]],
+        mountPath: '/catalog/:namespace/:kind/:name',
+        initialRouteEntries: [entityPath],
         config: {
           app: {
             title: 'Custom app',
@@ -801,14 +785,14 @@ describe('Entity page', () => {
         screen.findByText(/artist-lookup/),
       ).resolves.toBeInTheDocument();
 
-      await userEvent.click(screen.getByTestId('menu-button'));
+      await userEvent.click(await screen.findByTestId('menu-button'));
 
       await expect(
         screen.findByText('Test Title'),
       ).resolves.toBeInTheDocument();
 
       await expect(screen.findByText('Test Icon')).resolves.toBeInTheDocument();
-      const listItem = screen.getByText('Test Title').closest('li');
+      const listItem = (await screen.findByText('Test Title')).closest('li');
       expect(listItem).toHaveAttribute('aria-disabled', disabled.toString());
       if (!disabled) {
         await userEvent.click(screen.getByText('Test Title'));
@@ -870,6 +854,8 @@ describe('Entity page', () => {
           .add(filteredMenuItem);
 
         await renderInTestApp(tester.reactElement(), {
+          mountPath: '/catalog/:namespace/:kind/:name',
+          initialRouteEntries: [entityPath],
           config: {
             app: {
               title: 'Custom app',
@@ -882,7 +868,7 @@ describe('Entity page', () => {
               convertLegacyRouteRef(entityRouteRef),
           },
           apis: [
-            [catalogApiRef, mockCatalogApi],
+            mockCatalogApi,
             [starredEntitiesApiRef, mockStarredEntitiesApi],
           ],
         });