diff -r 000000000000 -r 6474c204b198 addon-sdk/source/test/addons/private-browsing-supported/test-tabs.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/test/addons/private-browsing-supported/test-tabs.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+'use strict';
+
+const tabs = require('sdk/tabs');
+const { isPrivate } = require('sdk/private-browsing');
+const pbUtils = require('sdk/private-browsing/utils');
+const { getOwnerWindow } = require('sdk/private-browsing/window/utils');
+
+exports.testPrivateTabsAreListed = function (assert, done) {
+  let originalTabCount = tabs.length;
+
+  tabs.open({
+    url: 'about:blank',
+    isPrivate: true,
+    onOpen: function(tab) {
+      let win = getOwnerWindow(tab);
+      // PWPB case
+      if (pbUtils.isWindowPBSupported || pbUtils.isTabPBSupported) {
+        assert.ok(isPrivate(tab), "tab is private");
+        assert.equal(tabs.length, originalTabCount + 1,
+                     'New private window\'s tab are visible in tabs list');
+      }
+      else {
+      // Global case, openDialog didn't opened a private window/tab
+        assert.ok(!isPrivate(tab), "tab isn't private");
+        assert.equal(tabs.length, originalTabCount + 1,
+                     'New non-private window\'s tab is visible in tabs list');
+      }
+
+      tab.close(done);
+    }
+  });
+};
+