diff --git a/e2e/admin.spec.ts b/e2e/admin.spec.ts
index afe3c76..aff0f44 100644
--- a/e2e/admin.spec.ts
+++ b/e2e/admin.spec.ts
@@ -34,7 +34,9 @@ test('admin panel: login form, wrong-creds error, session auth, DB grid CRUD, lo
 
   // --- Authenticate via the test hook + localStorage, then reopen the panel.
   const sessionId = await mintAdminSession(page);
-  await page.evaluate((key) => window.localStorage.setItem(key, sessionId), SESSION_KEY);
+  // Both values must be passed as arguments — the function runs in the browser, where Node-side
+  // variables are not in scope.
+  await page.evaluate(([key, sid]) => window.localStorage.setItem(key, sid), [SESSION_KEY, sessionId]);
   await page.reload();
   await expect(adminBtn).toBeVisible({ timeout: 30_000 });
   await adminBtn.click();