1 files changed, 18 insertions, 0 deletions
diff --git a/docshell/test/unit/test_pb_notification.js b/docshell/test/unit/test_pb_notification.js
new file mode 100644
index 0000000000..51cd3b95ff
--- /dev/null
+++ b/docshell/test/unit/test_pb_notification.js
@@ -0,0 +1,18 @@
+function destroy_transient_docshell() {
+  let windowlessBrowser = Services.appShell.createWindowlessBrowser(true);
+  windowlessBrowser.docShell.setOriginAttributes({ privateBrowsingId: 1 });
+  windowlessBrowser.close();
+  do_test_pending();
+  do_timeout(0, Cu.forceGC);
+}
+
+function run_test() {
+  var obs = {
+    observe(aSubject, aTopic, aData) {
+      Assert.equal(aTopic, "last-pb-context-exited");
+      do_test_finished();
+    },
+  };
+  Services.obs.addObserver(obs, "last-pb-context-exited");
+  destroy_transient_docshell();
+}