diff --git a/frontend/src/lib/document/WhoWhenSection.svelte.spec.ts b/frontend/src/lib/document/WhoWhenSection.svelte.spec.ts
index a1b26628..e38a0969 100644
--- a/frontend/src/lib/document/WhoWhenSection.svelte.spec.ts
+++ b/frontend/src/lib/document/WhoWhenSection.svelte.spec.ts
@@ -39,4 +39,17 @@ describe('WhoWhenSection — onMount seeding (Felix B1 fix regression fence)', (
 		const locationInput = document.querySelector('input#location') as HTMLInputElement;
 		expect(locationInput.value).toBe('Berlin');
 	});
+
+	// Regression fence for the DatePrecisionField extraction (#781): the existing
+	// spec covered only date pre-fill / hideDate / location, so the RANGE end-date
+	// reveal had no red signal. This test must stay green across the extraction.
+	it('reveals the end-date field when precision is RANGE', async () => {
+		render(WhoWhenSection, { precision: 'RANGE' });
+		await expect.element(page.getByLabelText('Enddatum')).toBeVisible();
+	});
+
+	it('hides the end-date field when precision is not RANGE', async () => {
+		render(WhoWhenSection, { precision: 'YEAR' });
+		await expect.element(page.getByTestId('who-when-end-date')).not.toBeInTheDocument();
+	});
 });