diff --git a/components/AppHeader/AppHeader.test.tsx b/components/AppHeader/AppHeader.test.tsx
new file mode 100644
index 00000000..592baa44
--- /dev/null
+++ b/components/AppHeader/AppHeader.test.tsx
@@ -0,0 +1,9 @@
+import { AppHeader } from 'components/AppHeader/AppHeader';
+import { render, screen } from 'setUpTest';
+
+describe('AppHeader', () => {
+  test('har overskrift på nivå h1', () => {
+    render(<AppHeader />);
+    expect(screen.getByRole('heading', { level: 1, name: 'Mine arbeidsavklarings­penger' })).toBeVisible();
+  });
+});
diff --git a/lib/utils/date.test.ts b/lib/utils/date.test.ts
new file mode 100644
index 00000000..c6fa6383
--- /dev/null
+++ b/lib/utils/date.test.ts
@@ -0,0 +1,27 @@
+import { formatDate, formatFullDate } from 'lib/utils/date';
+
+describe('date', () => {
+  describe('formatFullDate', () => {
+    test('returnerer tom streng når dato er undefined', () => {
+      const resultat = formatFullDate(undefined);
+      expect(resultat).toBe('');
+    });
+
+    test('returnerer dato på format dd.MM.yyyy HH:mm', () => {
+      const resultat = formatFullDate('2023-08-10T12:32');
+      expect(resultat).toBe('10.08.2023 12:32');
+    });
+  });
+
+  describe('formatDate', () => {
+    test('returnerer tom streng når dato er undefined', () => {
+      const resultat = formatDate(undefined);
+      expect(resultat).toBe('');
+    });
+
+    test('returnerer format på d. MMMM yyyy', () => {
+      const resultat = formatDate('2023-08-10T12:32');
+      expect(resultat).toBe('10. august 2023');
+    });
+  });
+});
diff --git a/next-env.d.ts b/next-env.d.ts
index fd36f949..4f11a03d 100755
--- a/next-env.d.ts
+++ b/next-env.d.ts
@@ -1,6 +1,5 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-/// <reference types="next/navigation-types/compat/navigation" />
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/basic-features/typescript for more information.