Selector('test-dialog');
          MockInteractions.tap(Polymer.dom(innerDialog).querySelector('[dialog-confirm]'));
          setTimeout(function() {
            assert.isFalse(innerDialog.opened, 'inner dialog is closed');
            assert.isTrue(dialog.opened, 'dialog is still open');
            done();
          }, 10);
        });

        var properties = ['noCancelOnEscKey', 'noCancelOnOutsideClick', 'withBackdrop'];
        properties.forEach(function(property) {

          test('modal sets ' + p