diff --git a/frontend/e2e/auth.spec.ts b/frontend/e2e/auth.spec.ts
index 767da083..da5c4118 100644
--- a/frontend/e2e/auth.spec.ts
+++ b/frontend/e2e/auth.spec.ts
@@ -61,6 +61,9 @@ test.describe('Authentication', () => {
 
 	test('logout clears the session and redirects to /login', async ({ page }) => {
 		await login(page);
+		// Wait for hydration before interacting with the nav — onclick handlers are
+		// only wired up after SvelteKit finishes hydrating the page client-side.
+		await page.waitForSelector('[data-hydrated]');
 		// Logout is inside the user avatar dropdown — open it first.
 		// Wait for the dropdown button to be visible before clicking Abmelden,
 		// since the {#if userMenuOpen} block renders asynchronously in Svelte.