diff --git a/django/newforms/widgets.py b/django/newforms/widgets.py
index ebbf2ab..5a830e3 100644
--- a/django/newforms/widgets.py
+++ b/django/newforms/widgets.py
@@ -321,8 +321,8 @@ class RadioFieldRenderer(StrAndUnicode):
 
     def render(self):
         """Outputs a <ul> for this set of radio fields."""
-        return mark_safe(u'<ul>\n%s\n</ul>' % u'\n'.join([u'<li>%s</li>'
-                % force_unicode(w) for w in self]))
+        return mark_safe(u'<ul%s>\n%s\n</ul>' % (flatatt(self.attrs), u'\n'.join([u'<li>%s</li>'
+                % force_unicode(w) for w in self])))
 
 class RadioSelect(Select):
     renderer = RadioFieldRenderer
@@ -360,7 +360,7 @@ class CheckboxSelectMultiple(SelectMultiple):
         if value is None: value = []
         has_id = attrs and 'id' in attrs
         final_attrs = self.build_attrs(attrs, name=name)
-        output = [u'<ul>']
+        output = [u'<ul%s>' % flatatt(self.build_attrs(attrs))]
         # Normalize to strings
         str_values = set([force_unicode(v) for v in value])
         for i, (option_value, option_label) in enumerate(chain(self.choices, choices)):
diff --git a/tests/regressiontests/forms/forms.py b/tests/regressiontests/forms/forms.py
index 7fc206d..1ef290f 100644
--- a/tests/regressiontests/forms/forms.py
+++ b/tests/regressiontests/forms/forms.py
@@ -442,7 +442,7 @@ gets a distinct ID, formed by appending an underscore plus the button's
 zero-based index.
 >>> f = FrameworkForm(auto_id='id_%s')
 >>> print f['language']
-<ul>
+<ul id="id_language">
 <li><label for="id_language_0"><input type="radio" id="id_language_0" value="P" name="language" /> Python</label></li>
 <li><label for="id_language_1"><input type="radio" id="id_language_1" value="J" name="language" /> Java</label></li>
 </ul>
@@ -452,19 +452,19 @@ either as_table() or as_ul(), the label for the RadioSelect will point to the
 ID of the *first* radio button.
 >>> print f
 <tr><th><label for="id_name">Name:</label></th><td><input type="text" name="name" id="id_name" /></td></tr>
-<tr><th><label for="id_language_0">Language:</label></th><td><ul>
+<tr><th><label for="id_language_0">Language:</label></th><td><ul id="id_language">
 <li><label for="id_language_0"><input type="radio" id="id_language_0" value="P" name="language" /> Python</label></li>
 <li><label for="id_language_1"><input type="radio" id="id_language_1" value="J" name="language" /> Java</label></li>
 </ul></td></tr>
 >>> print f.as_ul()
 <li><label for="id_name">Name:</label> <input type="text" name="name" id="id_name" /></li>
-<li><label for="id_language_0">Language:</label> <ul>
+<li><label for="id_language_0">Language:</label> <ul id="id_language">
 <li><label for="id_language_0"><input type="radio" id="id_language_0" value="P" name="language" /> Python</label></li>
 <li><label for="id_language_1"><input type="radio" id="id_language_1" value="J" name="language" /> Java</label></li>
 </ul></li>
 >>> print f.as_p()
 <p><label for="id_name">Name:</label> <input type="text" name="name" id="id_name" /></p>
-<p><label for="id_language_0">Language:</label> <ul>
+<p><label for="id_language_0">Language:</label> <ul id="id_language">
 <li><label for="id_language_0"><input type="radio" id="id_language_0" value="P" name="language" /> Python</label></li>
 <li><label for="id_language_1"><input type="radio" id="id_language_1" value="J" name="language" /> Java</label></li>
 </ul></p>
@@ -534,7 +534,7 @@ gets a distinct ID, formed by appending an underscore plus the checkbox's
 zero-based index.
 >>> f = SongForm(auto_id='%s_id')
 >>> print f['composers']
-<ul>
+<ul id="composers_id">
 <li><label for="composers_id_0"><input type="checkbox" name="composers" value="J" id="composers_id_0" /> John Lennon</label></li>
 <li><label for="composers_id_1"><input type="checkbox" name="composers" value="P" id="composers_id_1" /> Paul McCartney</label></li>
 </ul>
diff --git a/tests/regressiontests/forms/regressions.py b/tests/regressiontests/forms/regressions.py
index cbc8095..0f634d7 100644
--- a/tests/regressiontests/forms/regressions.py
+++ b/tests/regressiontests/forms/regressions.py
@@ -40,7 +40,7 @@ Unicode decoding problems...
 ...     somechoice = ChoiceField(choices=GENDERS, widget=RadioSelect(), label=u'\xc5\xf8\xdf')
 >>> f = SomeForm()
 >>> f.as_p()
-u'<p><label for="id_somechoice_0">\xc5\xf8\xdf:</label> <ul>\n<li><label for="id_somechoice_0"><input type="radio" id="id_somechoice_0" value="\xc5" name="somechoice" /> En tied\xe4</label></li>\n<li><label for="id_somechoice_1"><input type="radio" id="id_somechoice_1" value="\xf8" name="somechoice" /> Mies</label></li>\n<li><label for="id_somechoice_2"><input type="radio" id="id_somechoice_2" value="\xdf" name="somechoice" /> Nainen</label></li>\n</ul></p>'
+u'<p><label for="id_somechoice_0">\xc5\xf8\xdf:</label> <ul id="id_somechoice">\n<li><label for="id_somechoice_0"><input type="radio" id="id_somechoice_0" value="\xc5" name="somechoice" /> En tied\xe4</label></li>\n<li><label for="id_somechoice_1"><input type="radio" id="id_somechoice_1" value="\xf8" name="somechoice" /> Mies</label></li>\n<li><label for="id_somechoice_2"><input type="radio" id="id_somechoice_2" value="\xdf" name="somechoice" /> Nainen</label></li>\n</ul></p>'
 
 Testing choice validation with UTF-8 bytestrings as input (these are the
 Russian abbreviations "мес." and "шт.".
@@ -56,7 +56,7 @@ Translated error messages used to be buggy.
 >>> activate('ru')
 >>> f = SomeForm({})
 >>> f.as_p()
-u'<ul class="errorlist"><li>\u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043f\u043e\u043b\u0435.</li></ul>\n<p><label for="id_somechoice_0">\xc5\xf8\xdf:</label> <ul>\n<li><label for="id_somechoice_0"><input type="radio" id="id_somechoice_0" value="\xc5" name="somechoice" /> En tied\xe4</label></li>\n<li><label for="id_somechoice_1"><input type="radio" id="id_somechoice_1" value="\xf8" name="somechoice" /> Mies</label></li>\n<li><label for="id_somechoice_2"><input type="radio" id="id_somechoice_2" value="\xdf" name="somechoice" /> Nainen</label></li>\n</ul></p>'
+u'<ul class="errorlist"><li>\u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u0435 \u043f\u043e\u043b\u0435.</li></ul>\n<p><label for="id_somechoice_0">\xc5\xf8\xdf:</label> <ul id="id_somechoice">\n<li><label for="id_somechoice_0"><input type="radio" id="id_somechoice_0" value="\xc5" name="somechoice" /> En tied\xe4</label></li>\n<li><label for="id_somechoice_1"><input type="radio" id="id_somechoice_1" value="\xf8" name="somechoice" /> Mies</label></li>\n<li><label for="id_somechoice_2"><input type="radio" id="id_somechoice_2" value="\xdf" name="somechoice" /> Nainen</label></li>\n</ul></p>'
 >>> deactivate()
 
 Deep copying translated text shouldn't raise an error
diff --git a/tests/regressiontests/forms/widgets.py b/tests/regressiontests/forms/widgets.py
index 2c6b51a..d0ad268 100644
--- a/tests/regressiontests/forms/widgets.py
+++ b/tests/regressiontests/forms/widgets.py
@@ -740,7 +740,7 @@ u'<ul>\n<li><label><input checked="checked" type="radio" name="email" value="\u0
 # Attributes provided at instantiation are passed to the constituent inputs
 >>> w = RadioSelect(attrs={'id':'foo'})
 >>> print w.render('beatle', 'J', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')))
-<ul>
+<ul id="foo">
 <li><label for="foo_0"><input checked="checked" type="radio" id="foo_0" value="J" name="beatle" /> John</label></li>
 <li><label for="foo_1"><input type="radio" id="foo_1" value="P" name="beatle" /> Paul</label></li>
 <li><label for="foo_2"><input type="radio" id="foo_2" value="G" name="beatle" /> George</label></li>
@@ -750,7 +750,7 @@ u'<ul>\n<li><label><input checked="checked" type="radio" name="email" value="\u0
 # Attributes provided at render-time are passed to the constituent inputs
 >>> w = RadioSelect()
 >>> print w.render('beatle', 'J', choices=(('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo')), attrs={'id':'bar'})
-<ul>
+<ul id="bar">
 <li><label for="bar_0"><input checked="checked" type="radio" id="bar_0" value="J" name="beatle" /> John</label></li>
 <li><label for="bar_1"><input type="radio" id="bar_1" value="P" name="beatle" /> Paul</label></li>
 <li><label for="bar_2"><input type="radio" id="bar_2" value="G" name="beatle" /> George</label></li>