diff --git a/README.md b/README.md
index 44a6dee..09d8188 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
-# ticker-frontend [![Integration](https://github.com/systemli/ticker-frontend/actions/workflows/integration.yaml/badge.svg)](https://github.com/systemli/ticker-frontend/actions/workflows/integration.yaml)
+# ticker-frontend 
+
+[![Integration](https://github.com/systemli/ticker-frontend/actions/workflows/integration.yaml/badge.svg)](https://github.com/systemli/ticker-frontend/actions/workflows/integration.yaml) [![codecov](https://codecov.io/gh/systemli/ticker-frontend/branch/main/graph/badge.svg?token=bjZUlRawuh)](https://codecov.io/gh/systemli/ticker-frontend)
 
 ## Development
 
diff --git a/src/App.test.tsx b/src/App.test.tsx
index a0f6179..af11f28 100644
--- a/src/App.test.tsx
+++ b/src/App.test.tsx
@@ -26,10 +26,10 @@ describe('App', function () {
         domain: 'example.com',
         information: {
             author: 'Systemli Ticker Team',
-            url: '',
-            email: '',
-            twitter: '',
-            facebook: '',
+            url: 'https://demoticker.org',
+            email: 'admin@demoticker.org',
+            twitter: 'systemli',
+            facebook: 'betternot',
         },
     } as Ticker
 
@@ -44,6 +44,23 @@ describe('App', function () {
         ).toBeInTheDocument()
     })
 
+    test('renders ErrorView', async function () {
+        jest.spyOn(api, 'getInit').mockRejectedValue(
+            new Error(
+                'The server responses with an error: Internal Server Error (500)'
+            )
+        )
+        render(<App />)
+
+        expect(screen.getByText('Loading')).toBeInTheDocument()
+
+        expect(
+            await screen.findByText(
+                'There seems to be a problem connecting to the server.'
+            )
+        ).toBeInTheDocument()
+    })
+
     test('renders InactiveView', async function () {
         jest.spyOn(api, 'getInit').mockResolvedValue({
             data: {