--- a/browser/extensions/formautofill/test/mochitest/test_basic_creditcard_autocomplete_form.html
+++ b/browser/extensions/formautofill/test/mochitest/test_basic_creditcard_autocomplete_form.html
@@ -84,16 +84,22 @@ async function setupFormHistory() {
     {op: "add", fieldname: "cc-exp-year", value: 2023},
   ]);
 }
 
 initPopupListener();
 
 // Form with history only.
 add_task(async function history_only_menu_checking() {
+  // TODO: eliminate the timeout when we're able to indicate the right
+  // timing to start.
+  //
+  // After test process was re-spawning to https scheme. Wait 2 secs
+  // to ensure the environment is ready to do storage setup.
+  await sleep(2000);
   await setupFormHistory();
 
   await setInput("#cc-exp-year", "");
   doKey("down");
   await expectPopup();
   checkMenuEntries(["2023"], false);
 });
 

new file mode 100644