diff --git a/frontend/src/lib/document/DocumentTopBar.svelte.test.ts b/frontend/src/lib/document/DocumentTopBar.svelte.test.ts
index 93d07948..0bda8c47 100644
--- a/frontend/src/lib/document/DocumentTopBar.svelte.test.ts
+++ b/frontend/src/lib/document/DocumentTopBar.svelte.test.ts
@@ -46,10 +46,12 @@ describe('DocumentTopBar', () => {
 		await expect.element(page.getByRole('heading', { name: 'brief.pdf' })).toBeVisible();
 	});
 
-	it('renders the short documentDate when one is present', async () => {
+	it('renders the precision-aware long documentDate when one is present', async () => {
 		render(DocumentTopBar, { props: baseProps() });
 
-		await expect.element(page.getByText('15.04.1923')).toBeVisible();
+		// documentDate '1923-04-15' with default DAY precision renders the honest
+		// long German label via formatDocumentDate (Refs #666), not the old short form.
+		await expect.element(page.getByText('15. April 1923')).toBeVisible();
 	});
 
 	it('omits the date paragraph entirely when documentDate is null', async () => {
diff --git a/frontend/src/lib/document/DocumentTopBarTitle.svelte.test.ts b/frontend/src/lib/document/DocumentTopBarTitle.svelte.test.ts
index 5780590a..85fd68cf 100644
--- a/frontend/src/lib/document/DocumentTopBarTitle.svelte.test.ts
+++ b/frontend/src/lib/document/DocumentTopBarTitle.svelte.test.ts
@@ -32,10 +32,12 @@ describe('DocumentTopBarTitle', () => {
 		await expect.element(page.getByRole('heading', { name: 'brief.pdf' })).toBeVisible();
 	});
 
-	it('renders the short date format when a documentDate is supplied', async () => {
+	it('renders the precision-aware long date when a documentDate is supplied', async () => {
 		render(DocumentTopBarTitle, { props: baseProps });
 
-		await expect.element(page.getByText('15.04.1923')).toBeVisible();
+		// '1923-04-15' defaults to DAY precision and renders the honest long German
+		// label via formatDocumentDate (Refs #666), not the old short form.
+		await expect.element(page.getByText('15. April 1923')).toBeVisible();
 	});
 
 	it('omits the date paragraph entirely when documentDate is null', async () => {