diff --git a/IPython/html/tests/widgets/manager.js b/IPython/html/tests/widgets/manager.js
index 4281946..ea98dff 100644
--- a/IPython/html/tests/widgets/manager.js
+++ b/IPython/html/tests/widgets/manager.js
@@ -27,7 +27,7 @@ casper.notebook_test(function () {
 
     index = this.append_cell(
         'from IPython.html.widgets import Widget\n' + 
-        'widget = Widget.widgets.values()[0]\n' +
+        'widget = list(Widget.widgets.values())[0]\n' +
         'print(widget.model_id)');
     this.execute_cell_then(index, function(index) {
         var output = this.get_output_cell(index).text.trim();
diff --git a/IPython/html/widgets/widget.py b/IPython/html/widgets/widget.py
index f16b94d..1551b18 100644
--- a/IPython/html/widgets/widget.py
+++ b/IPython/html/widgets/widget.py
@@ -101,8 +101,7 @@ class Widget(LoggingConfigurable):
         """Static method, called when a widget is constructed."""
         target_name = msg['content']['data']['target_name']
         widget_class = import_item(target_name)
-        widget = widget_class(open_comm=False)
-        widget.comm = comm
+        widget = widget_class(comm=comm)
 
 
     #-------------------------------------------------------------------------
@@ -141,8 +140,7 @@ class Widget(LoggingConfigurable):
         super(Widget, self).__init__(**kwargs)
 
         Widget._call_widget_constructed(self)
-        if open_comm:
-            self.open()
+        self.open()
 
     def __del__(self):
         """Object disposal"""