diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index 970e83c0ecb..694767d6ac7 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -231,12 +231,16 @@ import Diff from './diff';
         case 'projects:milestones:new':
         case 'projects:milestones:edit':
         case 'projects:milestones:update':
+          new ZenMode();
+          new DueDateSelectors();
+          new GLForm($('.milestone-form'), true);
+          break;
         case 'groups:milestones:new':
         case 'groups:milestones:edit':
         case 'groups:milestones:update':
           new ZenMode();
           new DueDateSelectors();
-          new GLForm($('.milestone-form'), true);
+          new GLForm($('.milestone-form'), false);
           break;
         case 'projects:compare:show':
           new Diff();
diff --git a/app/views/groups/milestones/_form.html.haml b/app/views/groups/milestones/_form.html.haml
index cc879e5a308..a1be0d3220a 100644
--- a/app/views/groups/milestones/_form.html.haml
+++ b/app/views/groups/milestones/_form.html.haml
@@ -11,7 +11,7 @@
         = f.label :description, "Description", class: "control-label"
         .col-sm-10
           = render layout: 'projects/md_preview', locals: { url: group_preview_markdown_path } do
-            = render 'projects/zen', f: f, attr: :description, classes: 'note-textarea', placeholder: 'Write milestone description...'
+            = render 'projects/zen', f: f, attr: :description, classes: 'note-textarea', placeholder: 'Write milestone description...', supports_autocomplete: false
             .clearfix
             .error-alert
 
diff --git a/spec/features/groups/milestone_spec.rb b/spec/features/groups/milestone_spec.rb
index 12aa54a3da1..1b41b3842c8 100644
--- a/spec/features/groups/milestone_spec.rb
+++ b/spec/features/groups/milestone_spec.rb
@@ -19,9 +19,9 @@ feature 'Group milestones', :js do
     end
 
     it 'renders description preview' do
-      form = find('.gfm-form')
+      description = find('.note-textarea')
 
-      form.fill_in(:milestone_description, with: '')
+      description.native.send_keys('')
 
       click_link('Preview')
 
@@ -31,7 +31,7 @@ feature 'Group milestones', :js do
 
       click_link('Write')
 
-      form.fill_in(:milestone_description, with: ':+1: Nice')
+      description.native.send_keys(':+1: Nice')
 
       click_link('Preview')
 
@@ -51,6 +51,13 @@ feature 'Group milestones', :js do
 
       expect(find('.start_date')).to have_content(Date.today.at_beginning_of_month.strftime('%b %-d, %Y'))
     end
+
+    it 'description input does not support autocomplete' do
+      description = find('.note-textarea')
+      description.native.send_keys('!')
+
+      expect(page).not_to have_selector('.atwho-view')
+    end
   end
 
   context 'milestones list' do