diff --git a/test/tomorrow/tomorrow.js b/test/tomorrow/tomorrow.js
index 9ff554de4..c061ad181 100644
--- a/test/tomorrow/tomorrow.js
+++ b/test/tomorrow/tomorrow.js
@@ -1,7 +1,10 @@
 const tomorrow = () => {
-  let t = new Date();
+  const t = new Date();
   t.setDate(t.getDate() + 1);
-  return t.toISOString().split('T')[0];
+  const year = t.getFullYear();
+  const month = String(t.getMonth() + 1).padStart(2, '0');
+  const date = String(t.getDate()).padStart(2, '0');
+  return `${year}-${month}-${date}`;
 };
 
 module.exports = tomorrow;