diff --git a/frontend/src/lib/document/DocumentRow.svelte.test.ts b/frontend/src/lib/document/DocumentRow.svelte.test.ts
index 94b30a44..ca66951e 100644
--- a/frontend/src/lib/document/DocumentRow.svelte.test.ts
+++ b/frontend/src/lib/document/DocumentRow.svelte.test.ts
@@ -154,10 +154,11 @@ describe('DocumentRow', () => {
 		await expect.element(page.getByTestId('doc-summary')).toBeVisible();
 	});
 
-	it('renders an em-dash for missing documentDate', async () => {
+	it("renders 'Datum unbekannt' for a missing documentDate", async () => {
 		render(DocumentRow, { props: { item: baseItem({ documentDate: null }) } });
 
-		// Multiple em-dashes possible; just ensure at least one is rendered
-		expect(document.body.textContent).toContain('—');
+		// #668: an undated document renders the "Datum unbekannt" badge (via
+		// <DocumentDate>), never a bare em-dash.
+		await expect.element(page.getByText('Datum unbekannt').first()).toBeInTheDocument();
 	});
 });