diff --git a/app/views/shared/milestones/_milestone.html.haml b/app/views/shared/milestones/_milestone.html.haml
index 6f6a036b13f..6a85f7d0564 100644
--- a/app/views/shared/milestones/_milestone.html.haml
+++ b/app/views/shared/milestones/_milestone.html.haml
@@ -32,7 +32,7 @@
         .col-sm-6.milestone-actions
           - if can?(current_user, :admin_milestones, @group)
             - if milestone.is_group_milestone?
-              = link_to edit_group_milestone_path(@group, milestone.id), class: "btn btn-xs btn-grouped" do
+              = link_to edit_group_milestone_path(@group, milestone), class: "btn btn-xs btn-grouped" do
                 Edit
               \
             - if milestone.closed?
diff --git a/app/views/shared/milestones/_top.html.haml b/app/views/shared/milestones/_top.html.haml
index b93837e3087..3014300fbe7 100644
--- a/app/views/shared/milestones/_top.html.haml
+++ b/app/views/shared/milestones/_top.html.haml
@@ -23,7 +23,7 @@
     .pull-right
       - if can?(current_user, :admin_milestones, group)
         - if milestone.is_group_milestone?
-          = link_to edit_group_milestone_path(group, milestone.iid), class: "btn btn btn-grouped" do
+          = link_to edit_group_milestone_path(group, milestone), class: "btn btn btn-grouped" do
             Edit
         - if milestone.active?
           = link_to 'Close Milestone', group_milestone_route(milestone, {state_event: :close }), method: :put, class: "btn btn-grouped btn-close"
diff --git a/spec/features/groups/milestone_spec.rb b/spec/features/groups/milestone_spec.rb
index 32b3e13c624..56144d17d4f 100644
--- a/spec/features/groups/milestone_spec.rb
+++ b/spec/features/groups/milestone_spec.rb
@@ -35,12 +35,12 @@ feature 'Group milestones', :js do
   context 'milestones list' do
     let!(:other_project) { create(:project_empty_repo, group: group) }
 
-    let!(:active_group_milestone) { create(:milestone, group: group, state: 'active') }
     let!(:active_project_milestone1) { create(:milestone, project: project, state: 'active', title: 'v1.0') }
     let!(:active_project_milestone2) { create(:milestone, project: other_project, state: 'active', title: 'v1.0') }
-    let!(:closed_group_milestone) { create(:milestone, group: group, state: 'closed') }
     let!(:closed_project_milestone1) { create(:milestone, project: project, state: 'closed', title: 'v2.0') }
     let!(:closed_project_milestone2) { create(:milestone, project: other_project, state: 'closed', title: 'v2.0') }
+    let!(:active_group_milestone) { create(:milestone, group: group, state: 'active') }
+    let!(:closed_group_milestone) { create(:milestone, group: group, state: 'closed') }
 
     before do
       visit group_milestones_path(group)
@@ -58,5 +58,30 @@ feature 'Group milestones', :js do
       expect(page).to have_selector("#milestone_#{active_group_milestone.id}", count: 1)
       expect(page).to have_selector("#milestone_#{legacy_milestone.milestones.first.id}", count: 1)
     end
+
+    it 'updates milestone' do
+      page.within(".milestones #milestone_#{active_group_milestone.id}") do
+        click_link('Edit')
+      end
+
+      page.within('.milestone-form') do
+        fill_in 'milestone_title', with: 'new title'
+        click_button('Update milestone')
+      end
+
+      expect(find('#content-body h2')).to have_content('new title')
+    end
+
+    it 'shows milestone detail and supports its edit' do
+      page.within(".milestones #milestone_#{active_group_milestone.id}") do
+        click_link(active_group_milestone.title)
+      end
+
+      page.within('.detail-page-header') do
+        click_link('Edit')
+      end
+
+      expect(page).to have_selector('.milestone-form')
+    end
   end
 end