diff --git a/frontend/src/lib/document/viewer/usePdfRenderer.svelte.test.ts b/frontend/src/lib/document/viewer/usePdfRenderer.svelte.test.ts
index c6b40f81..a5647cde 100644
--- a/frontend/src/lib/document/viewer/usePdfRenderer.svelte.test.ts
+++ b/frontend/src/lib/document/viewer/usePdfRenderer.svelte.test.ts
@@ -83,7 +83,7 @@ describe('createPdfRenderer', () => {
 	it('leaves pdfjsReady false when libLoader rejects', async () => {
 		const failingLoader = vi.fn().mockRejectedValue(new Error('load failed'));
 		const r = createPdfRenderer(failingLoader);
-		await r.init().catch(() => {});
+		await expect(r.init()).rejects.toThrow('load failed');
 		expect(r.pdfjsReady).toBe(false);
 	});
 });