1 files changed, 8 insertions, 0 deletions
diff --git a/dom/serviceworkers/test/lazy_worker.js b/dom/serviceworkers/test/lazy_worker.js
new file mode 100644
index 0000000000..6f8681d25c
--- /dev/null
+++ b/dom/serviceworkers/test/lazy_worker.js
@@ -0,0 +1,8 @@
+onactivate = function (event) {
+  var promise = new Promise(function (res) {
+    setTimeout(function () {
+      res();
+    }, 500);
+  });
+  event.waitUntil(promise);
+};