diff --git a/uriloader/exthandler/tests/mochitest/browser_protocol_ask_dialog_permission.js b/uriloader/exthandler/tests/mochitest/browser_protocol_ask_dialog_permission.js
index 5f00ca93942e..675ef9a225ed 100644
--- a/uriloader/exthandler/tests/mochitest/browser_protocol_ask_dialog_permission.js
+++ b/uriloader/exthandler/tests/mochitest/browser_protocol_ask_dialog_permission.js
@@ -331,8 +331,7 @@ async function testCheckbox(
   }
 
   if (typeof actionCheckbox == "boolean") {
-    checkbox.focus();
-    await EventUtils.synthesizeKey("VK_SPACE", undefined, dialogEl.ownerWindow);
+    checkbox.click();
   }
 }