diff --git a/frontend/src/routes/zeitstrahl/page.svelte.spec.ts b/frontend/src/routes/zeitstrahl/page.svelte.spec.ts
index 50782a41..af31f0c9 100644
--- a/frontend/src/routes/zeitstrahl/page.svelte.spec.ts
+++ b/frontend/src/routes/zeitstrahl/page.svelte.spec.ts
@@ -17,10 +17,21 @@ const event = (title: string) =>
 		documentId: undefined
 	});
 
+// The route's PageData merges the layout's auth fields with the page load's
+// timeline; the component only reads `timeline`, but the full shape keeps the
+// test type-clean.
+const pageData = (timeline: ReturnType<typeof makeTimelineDTO>) => ({
+	user: undefined,
+	canWrite: false,
+	canAnnotate: false,
+	canBlogWrite: false,
+	timeline
+});
+
 describe('/zeitstrahl page', () => {
 	it('wraps the timeline in a bordered, rounded canvas frame (REQ-001)', () => {
 		render(Page, {
-			data: { timeline: makeTimelineDTO({ years: [makeYear(1909, [makeEntry()])] }) }
+			data: pageData(makeTimelineDTO({ years: [makeYear(1909, [makeEntry()])] }))
 		});
 		const canvas = document.querySelector('[data-testid="timeline-canvas"]');
 		expect(canvas).not.toBeNull();
@@ -41,7 +52,7 @@ describe('/zeitstrahl page', () => {
 				makeYear(1924, [makeEntry({ documentId: 'c' }), event('Tod')])
 			]
 		});
-		render(Page, { data: { timeline: dto } });
+		render(Page, { data: pageData(dto) });
 		const sub = document.querySelector('[data-testid="timeline-meta"]');
 		expect(sub?.textContent).toContain('1909–1924');
 		expect(sub?.textContent).toContain(m.timeline_letters_count({ count: 3 }));
@@ -51,7 +62,7 @@ describe('/zeitstrahl page', () => {
 
 	it('omits the range segment when there are no year bands (REQ-002)', () => {
 		render(Page, {
-			data: { timeline: makeTimelineDTO({ undated: [makeEntry({ documentId: 'u1' })] }) }
+			data: pageData(makeTimelineDTO({ undated: [makeEntry({ documentId: 'u1' })] }))
 		});
 		const sub = document.querySelector('[data-testid="timeline-meta"]');
 		expect(sub).not.toBeNull();
@@ -60,7 +71,7 @@ describe('/zeitstrahl page', () => {
 	});
 
 	it('omits the entire sub-line for an empty timeline (REQ-002)', () => {
-		render(Page, { data: { timeline: makeTimelineDTO() } });
+		render(Page, { data: pageData(makeTimelineDTO()) });
 		expect(document.querySelector('[data-testid="timeline-meta"]')).toBeNull();
 	});
 });