readonly attribute isn't relevant on a number of input element types

lib/capybara/rack_test/node.rb

@@ -108,6 +108,13 @@ class Capybara::RackTest::Node < Capybara::Driver::Node
     end
   end
 
+  def readonly?
+    # readonly attribute not valid on these input types
+    return false if input_field? && %w[hidden range color checkbox radio file submit image reset button].include?(type)
+
+    super
+  end
+
   def path
     native.path
   end

lib/capybara/spec/session/choose_spec.rb

@@ -11,6 +11,12 @@ Capybara::SpecHelper.spec '#choose' do
     expect(extract_results(@session)['gender']).to eq('male')
   end
 
+  it 'ignores readonly attribute on radio buttons' do
+    @session.choose('gender_both')
+    @session.click_button('awesome')
+    expect(extract_results(@session)['gender']).to eq('both')
+  end
+
   it 'should choose a radio button by label' do
     @session.choose('Both')
     @session.click_button('awesome')

lib/capybara/spec/views/form.erb

@@ -170,7 +170,7 @@ New line after and before textarea tag
     <label for="gender_male">Male</label>
     <input type="radio" name="form[gender]" value="female" id="gender_female" checked="checked"/>
     <label for="gender_female">Female</label>
-    <input type="radio" name="form[gender]" value="both" id="gender_both"/>
+    <input type="radio" name="form[gender]" value="both" id="gender_both" readonly="readonly"/>
     <label for="gender_both">Both</label>
   </p>