diff --git a/django/newforms/widgets.py b/django/newforms/widgets.py
index 355695efd2..2c235513d0 100644
--- a/django/newforms/widgets.py
+++ b/django/newforms/widgets.py
@@ -96,7 +96,7 @@ class PasswordInput(Input):
     input_type = 'password'
 
     def __init__(self, attrs=None, render_value=True):
-        self.attrs = attrs or {}
+        super(PasswordInput, self).__init__(attrs)
         self.render_value = render_value
 
     def render(self, name, value, attrs=None):
@@ -113,8 +113,8 @@ class MultipleHiddenInput(HiddenInput):
     of values.
     """
     def __init__(self, attrs=None, choices=()):
+        super(MultipleHiddenInput, self).__init__(attrs)
         # choices can be any iterable
-        self.attrs = attrs or {}
         self.choices = choices
 
     def render(self, name, value, attrs=None, choices=()):
@@ -153,9 +153,9 @@ class Textarea(Widget):
 
 class CheckboxInput(Widget):
     def __init__(self, attrs=None, check_test=bool):
+        super(CheckboxInput, self).__init__(attrs)
         # check_test is a callable that takes a value and returns True
         # if the checkbox should be checked for that value.
-        self.attrs = attrs or {}
         self.check_test = check_test
 
     def render(self, name, value, attrs=None):
@@ -172,7 +172,7 @@ class CheckboxInput(Widget):
 
 class Select(Widget):
     def __init__(self, attrs=None, choices=()):
-        self.attrs = attrs or {}
+        super(Select, self).__init__(attrs)
         # choices can be any iterable, but we may need to render this widget
         # multiple times. Thus, collapse it into a list so it can be consumed
         # more than once.
@@ -211,8 +211,8 @@ class NullBooleanSelect(Select):
 
 class SelectMultiple(Widget):
     def __init__(self, attrs=None, choices=()):
+        super(SelectMultiple, self).__init__(attrs)
         # choices can be any iterable
-        self.attrs = attrs or {}
         self.choices = choices
 
     def render(self, name, value, attrs=None, choices=()):