diff --git a/frontend/packages/core/src/api/entityView/EntityPageBuilder.tsx b/frontend/packages/core/src/api/entityView/EntityPageBuilder.tsx
index 7944b26ca7..fdbdef01fb 100644
--- a/frontend/packages/core/src/api/entityView/EntityPageBuilder.tsx
+++ b/frontend/packages/core/src/api/entityView/EntityPageBuilder.tsx
@@ -3,6 +3,7 @@ import DefaultEntityPage from '../../components/DefaultEntityPage';
 import { App, AppComponentBuilder } from '../app/types';
 import BackstagePlugin from '../plugin/Plugin';
 import { EntityPageNavItem, EntityPageView } from './types';
+import { IconComponent } from '../types';
 
 // type AppComponents = {
 //   EntityPage: ComponentType<EntityPageProps>;
@@ -10,8 +11,6 @@ import { EntityPageNavItem, EntityPageView } from './types';
 //   EntityPageHeader: ComponentType<EntityPageHeaderProps>;
 // };
 
-type IconComponent = ComponentType<{ fontSize?: number }>;
-
 type EntityPageRegistration =
   | {
       type: 'page';
diff --git a/frontend/packages/core/src/api/plugin/Plugin.tsx b/frontend/packages/core/src/api/plugin/Plugin.tsx
index dfe5da2993..772776e288 100644
--- a/frontend/packages/core/src/api/plugin/Plugin.tsx
+++ b/frontend/packages/core/src/api/plugin/Plugin.tsx
@@ -1,5 +1,6 @@
 import { ComponentType } from 'react';
 import { PluginOutput, RoutePath, RouteOptions } from './types';
+import { IconComponent } from '../types';
 
 export type PluginConfig = {
   id: string;
diff --git a/frontend/packages/plugins/home-page/src/components/HomePage/HomePage.test.tsx b/frontend/packages/plugins/home-page/src/components/HomePage/HomePage.test.tsx
index 383bc9a5aa..fc495d3111 100644
--- a/frontend/packages/plugins/home-page/src/components/HomePage/HomePage.test.tsx
+++ b/frontend/packages/plugins/home-page/src/components/HomePage/HomePage.test.tsx
@@ -1,10 +1,16 @@
 import React from 'react';
 import { render } from '@testing-library/react';
 import HomePage from './HomePage';
+import { ThemeProvider } from '@material-ui/core';
+import { BackstageTheme } from '@backstage/core';
 
 describe('HomePage', () => {
   it('should render', () => {
-    const rendered = render(<HomePage />);
+    const rendered = render(
+      <ThemeProvider theme={BackstageTheme}>
+        <HomePage />
+      </ThemeProvider>,
+    );
     expect(rendered.baseElement).toBeInTheDocument();
   });
 });