diff --git a/app/assets/javascripts/ide/stores/utils.js b/app/assets/javascripts/ide/stores/utils.js
index be7ee80656f3578fe5be406d51adbed5250711d9..a29d9bf3b4097c70f16c97b20bb00b5482c8c49a 100644
--- a/app/assets/javascripts/ide/stores/utils.js
+++ b/app/assets/javascripts/ide/stores/utils.js
@@ -162,7 +162,7 @@ export const createCommitPayload = ({
 });
 
 export const createNewMergeRequestUrl = (projectUrl, source, target) =>
-  `${projectUrl}/merge_requests/new?merge_request[source_branch]=${source}&merge_request[target_branch]=${target}&nav_source=webide`;
+  `${projectUrl}/-/merge_requests/new?merge_request[source_branch]=${source}&merge_request[target_branch]=${target}&nav_source=webide`;
 
 const sortTreesByTypeAndName = (a, b) => {
   if (a.type === 'tree' && b.type === 'blob') {
diff --git a/app/assets/javascripts/merge_request_tabs.js b/app/assets/javascripts/merge_request_tabs.js
index 52674107df21875ea05364dbdaade00476c151fa..8d09e88e772f60ac5729c4c51207290401902fb9 100644
--- a/app/assets/javascripts/merge_request_tabs.js
+++ b/app/assets/javascripts/merge_request_tabs.js
@@ -32,17 +32,17 @@ import { __ } from './locale';
 //
 //   <ul class="nav-links merge-request-tabs">
 //     <li class="notes-tab active">
-//       <a data-action="notes" data-target="#notes" data-toggle="tab" href="/foo/bar/merge_requests/1">
+//       <a data-action="notes" data-target="#notes" data-toggle="tab" href="/foo/bar/-/merge_requests/1">
 //         Discussion
 //       </a>
 //     </li>
 //     <li class="commits-tab">
-//       <a data-action="commits" data-target="#commits" data-toggle="tab" href="/foo/bar/merge_requests/1/commits">
+//       <a data-action="commits" data-target="#commits" data-toggle="tab" href="/foo/bar/-/merge_requests/1/commits">
 //         Commits
 //       </a>
 //     </li>
 //     <li class="diffs-tab">
-//       <a data-action="diffs" data-target="#diffs" data-toggle="tab" href="/foo/bar/merge_requests/1/diffs">
+//       <a data-action="diffs" data-target="#diffs" data-toggle="tab" href="/foo/bar/-/merge_requests/1/diffs">
 //         Diffs
 //       </a>
 //     </li>
@@ -260,17 +260,17 @@ export default class MergeRequestTabs {
   //
   // Examples:
   //
-  //   location.pathname # => "/namespace/project/merge_requests/1"
+  //   location.pathname # => "/namespace/project/-/merge_requests/1"
   //   setCurrentAction('diffs')
-  //   location.pathname # => "/namespace/project/merge_requests/1/diffs"
+  //   location.pathname # => "/namespace/project/-/merge_requests/1/diffs"
   //
-  //   location.pathname # => "/namespace/project/merge_requests/1/diffs"
+  //   location.pathname # => "/namespace/project/-/merge_requests/1/diffs"
   //   setCurrentAction('show')
-  //   location.pathname # => "/namespace/project/merge_requests/1"
+  //   location.pathname # => "/namespace/project/-/merge_requests/1"
   //
-  //   location.pathname # => "/namespace/project/merge_requests/1/diffs"
+  //   location.pathname # => "/namespace/project/-/merge_requests/1/diffs"
   //   setCurrentAction('commits')
-  //   location.pathname # => "/namespace/project/merge_requests/1/commits"
+  //   location.pathname # => "/namespace/project/-/merge_requests/1/commits"
   //
   // Returns the new URL String
   setCurrentAction(action) {
diff --git a/app/models/project_services/chat_message/merge_message.rb b/app/models/project_services/chat_message/merge_message.rb
index 46313ba7becb2594ecca776d840e2f1e080674c9..dc62a4c8908f428b1c15509cad804d8faa2e3c58 100644
--- a/app/models/project_services/chat_message/merge_message.rb
+++ b/app/models/project_services/chat_message/merge_message.rb
@@ -62,7 +62,7 @@ def merge_request_title
     end
 
     def merge_request_url
-      "#{project_url}/merge_requests/#{merge_request_iid}"
+      "#{project_url}/-/merge_requests/#{merge_request_iid}"
     end
 
     # overridden in EE
diff --git a/app/models/project_services/hipchat_service.rb b/app/models/project_services/hipchat_service.rb
index 019bd54f48c647bcfe4739fe643b81349b2e1cdd..c92e8ecb31cda059c613a874fd5a318b87fbf1c5 100644
--- a/app/models/project_services/hipchat_service.rb
+++ b/app/models/project_services/hipchat_service.rb
@@ -184,7 +184,7 @@ def create_merge_request_message(data)
     description = obj_attr[:description]
     title = render_line(obj_attr[:title])
 
-    merge_request_url = "#{project_url}/merge_requests/#{merge_request_id}"
+    merge_request_url = "#{project_url}/-/merge_requests/#{merge_request_id}"
     merge_request_link = "<a href=\"#{merge_request_url}\">merge request !#{merge_request_id}</a>"
     message = ["#{user_name} #{state} #{merge_request_link} in " \
       "#{project_link}: <b>#{title}</b>"]
diff --git a/changelogs/unreleased/dz-move-project-routes.yml b/changelogs/unreleased/dz-move-project-routes.yml
new file mode 100644
index 0000000000000000000000000000000000000000..97029f239070fe7a17a114647aaee4e2afadc192
--- /dev/null
+++ b/changelogs/unreleased/dz-move-project-routes.yml
@@ -0,0 +1,5 @@
+---
+title: Move merge request routes under /-/ scope
+merge_request: 21126
+author:
+type: deprecated
diff --git a/config/routes/project.rb b/config/routes/project.rb
index 1a5c58105b28402f4a2a378caadc49c8856047e9..c29d673f315dc232fd96b8997b7f4ad76734a2fe 100644
--- a/config/routes/project.rb
+++ b/config/routes/project.rb
@@ -260,6 +260,82 @@
           end
         end
 
+        resources :merge_requests, concerns: :awardable, except: [:new, :create, :show], constraints: { id: /\d+/ } do
+          member do
+            get :show # Insert this first to ensure redirections using merge_requests#show match this route
+            get :commit_change_content
+            post :merge
+            post :cancel_auto_merge
+            get :pipeline_status
+            get :ci_environments_status
+            post :toggle_subscription
+            post :remove_wip
+            post :assign_related_issues
+            get :discussions, format: :json
+            post :rebase
+            get :test_reports
+            get :exposed_artifacts
+
+            scope constraints: ->(req) { req.format == :json }, as: :json do
+              get :commits
+              get :pipelines
+              get :diffs, to: 'merge_requests/diffs#show'
+              get :diffs_batch, to: 'merge_requests/diffs#diffs_batch'
+              get :diffs_metadata, to: 'merge_requests/diffs#diffs_metadata'
+              get :widget, to: 'merge_requests/content#widget'
+              get :cached_widget, to: 'merge_requests/content#cached_widget'
+            end
+
+            scope action: :show do
+              get :commits, defaults: { tab: 'commits' }
+              get :pipelines, defaults: { tab: 'pipelines' }
+              get :diffs, defaults: { tab: 'diffs' }
+            end
+
+            get :diff_for_path, controller: 'merge_requests/diffs'
+
+            scope controller: 'merge_requests/conflicts' do
+              get :conflicts, action: :show
+              get :conflict_for_path
+              post :resolve_conflicts
+            end
+          end
+
+          collection do
+            get :diff_for_path
+            post :bulk_update
+          end
+
+          resources :discussions, only: [:show], constraints: { id: /\h{40}/ } do
+            member do
+              post :resolve
+              delete :resolve, action: :unresolve
+            end
+          end
+        end
+
+        scope path: 'merge_requests', controller: 'merge_requests/creations' do
+          post '', action: :create, as: nil
+
+          scope path: 'new', as: :new_merge_request do
+            get '', action: :new
+
+            scope constraints: ->(req) { req.format == :json }, as: :json do
+              get :diffs
+              get :pipelines
+            end
+
+            scope action: :new do
+              get :diffs, defaults: { tab: 'diffs' }
+              get :pipelines, defaults: { tab: 'pipelines' }
+            end
+
+            get :diff_for_path
+            get :branch_from
+            get :branch_to
+          end
+        end
+
         # The wiki routing contains wildcard characters so
         # its preferable to keep it below all other project routes
         draw :wiki
@@ -317,82 +393,6 @@
         end
       end
 
-      resources :merge_requests, concerns: :awardable, except: [:new, :create, :show], constraints: { id: /\d+/ } do
-        member do
-          get :show # Insert this first to ensure redirections using merge_requests#show match this route
-          get :commit_change_content
-          post :merge
-          post :cancel_auto_merge
-          get :pipeline_status
-          get :ci_environments_status
-          post :toggle_subscription
-          post :remove_wip
-          post :assign_related_issues
-          get :discussions, format: :json
-          post :rebase
-          get :test_reports
-          get :exposed_artifacts
-
-          scope constraints: ->(req) { req.format == :json }, as: :json do
-            get :commits
-            get :pipelines
-            get :diffs, to: 'merge_requests/diffs#show'
-            get :diffs_batch, to: 'merge_requests/diffs#diffs_batch'
-            get :diffs_metadata, to: 'merge_requests/diffs#diffs_metadata'
-            get :widget, to: 'merge_requests/content#widget'
-            get :cached_widget, to: 'merge_requests/content#cached_widget'
-          end
-
-          scope action: :show do
-            get :commits, defaults: { tab: 'commits' }
-            get :pipelines, defaults: { tab: 'pipelines' }
-            get :diffs, defaults: { tab: 'diffs' }
-          end
-
-          get :diff_for_path, controller: 'merge_requests/diffs'
-
-          scope controller: 'merge_requests/conflicts' do
-            get :conflicts, action: :show
-            get :conflict_for_path
-            post :resolve_conflicts
-          end
-        end
-
-        collection do
-          get :diff_for_path
-          post :bulk_update
-        end
-
-        resources :discussions, only: [:show], constraints: { id: /\h{40}/ } do
-          member do
-            post :resolve
-            delete :resolve, action: :unresolve
-          end
-        end
-      end
-
-      scope path: 'merge_requests', controller: 'merge_requests/creations' do
-        post '', action: :create, as: nil
-
-        scope path: 'new', as: :new_merge_request do
-          get '', action: :new
-
-          scope constraints: ->(req) { req.format == :json }, as: :json do
-            get :diffs
-            get :pipelines
-          end
-
-          scope action: :new do
-            get :diffs, defaults: { tab: 'diffs' }
-            get :pipelines, defaults: { tab: 'pipelines' }
-          end
-
-          get :diff_for_path
-          get :branch_from
-          get :branch_to
-        end
-      end
-
       resources :pipelines, only: [:index, :new, :create, :show] do
         collection do
           resource :pipelines_settings, path: 'settings', only: [:show, :update]
@@ -546,7 +546,7 @@
                                             :forks, :group_links, :import, :avatar, :mirror,
                                             :cycle_analytics, :mattermost, :variables, :triggers,
                                             :environments, :protected_environments, :error_tracking,
-                                            :serverless, :clusters, :audit_events, :wikis)
+                                            :serverless, :clusters, :audit_events, :wikis, :merge_requests)
     end
 
     # rubocop: disable Cop/PutProjectRoutesUnderScope
diff --git a/ee/app/assets/javascripts/onboarding/tour_parts.js b/ee/app/assets/javascripts/onboarding/tour_parts.js
index 6b6cafbd02bbfb81c98091cec6861edca1de2e6b..a2e269f96064f5dcbab54d3ab213c066c7768561 100644
--- a/ee/app/assets/javascripts/onboarding/tour_parts.js
+++ b/ee/app/assets/javascripts/onboarding/tour_parts.js
@@ -253,7 +253,7 @@ const GUIDED_GITLAB_TOUR = [
     },
   },
   {
-    forUrl: ({ projectFullPath }) => new RegExp(`${projectFullPath}/merge_requests$`, ''),
+    forUrl: ({ projectFullPath }) => new RegExp(`${projectFullPath}/-/merge_requests$`, ''),
     getHelpContent: () => [
       {
         text: s__(
@@ -270,7 +270,7 @@ const GUIDED_GITLAB_TOUR = [
     },
   },
   {
-    forUrl: ({ projectFullPath }) => new RegExp(`${projectFullPath}/merge_requests/[0-9]+$`, ''),
+    forUrl: ({ projectFullPath }) => new RegExp(`${projectFullPath}/-/merge_requests/[0-9]+$`, ''),
     getHelpContent: () => [
       {
         text: sprintf(
diff --git a/ee/config/routes/project.rb b/ee/config/routes/project.rb
index 8793429aaedc27d485160f0bb47ece1aeb7e4703..01737c75d7d0243cb44fbec30eb321c30bb37905 100644
--- a/ee/config/routes/project.rb
+++ b/ee/config/routes/project.rb
@@ -83,6 +83,37 @@
         end
 
         resources :audit_events, only: [:index]
+
+        resources :merge_requests, only: [], constraints: { id: /\d+/ } do
+          member do
+            get '/descriptions/:version_id/diff', action: :description_diff, as: :description_diff
+            get :metrics_reports
+            get :license_management_reports
+            get :container_scanning_reports
+            get :dependency_scanning_reports
+            get :sast_reports
+            get :dast_reports
+
+            get :approvals
+            post :approvals, action: :approve
+            delete :approvals, action: :unapprove
+
+            post :rebase
+          end
+
+          resources :approvers, only: :destroy
+          delete 'approvers', to: 'approvers#destroy_via_user_id', as: :approver_via_user_id
+          resources :approver_groups, only: :destroy
+
+          scope module: :merge_requests do
+            resources :drafts, only: [:index, :update, :create, :destroy] do
+              collection do
+                post :publish
+                delete :discard
+              end
+            end
+          end
+        end
       end
       # End of the /-/ scope.
 
@@ -138,37 +169,6 @@
       get '/service_desk' => 'service_desk#show', as: :service_desk
       put '/service_desk' => 'service_desk#update', as: :service_desk_refresh
 
-      resources :merge_requests, only: [], constraints: { id: /\d+/ } do
-        member do
-          get '/descriptions/:version_id/diff', action: :description_diff, as: :description_diff
-          get :metrics_reports
-          get :license_management_reports
-          get :container_scanning_reports
-          get :dependency_scanning_reports
-          get :sast_reports
-          get :dast_reports
-
-          get :approvals
-          post :approvals, action: :approve
-          delete :approvals, action: :unapprove
-
-          post :rebase
-        end
-
-        resources :approvers, only: :destroy
-        delete 'approvers', to: 'approvers#destroy_via_user_id', as: :approver_via_user_id
-        resources :approver_groups, only: :destroy
-
-        scope module: :merge_requests do
-          resources :drafts, only: [:index, :update, :create, :destroy] do
-            collection do
-              post :publish
-              delete :discard
-            end
-          end
-        end
-      end
-
       resources :approvers, only: :destroy
       resources :approver_groups, only: :destroy
       resources :push_rules, constraints: { id: /\d+/ }, only: [:update]
diff --git a/ee/spec/frontend/notes/components/note_actions_spec.js b/ee/spec/frontend/notes/components/note_actions_spec.js
index 5d7eeb11ed77ff8417de3f1e53390a6545be05b4..27fec5754dddaf755e8371023e7baf934dee3bba 100644
--- a/ee/spec/frontend/notes/components/note_actions_spec.js
+++ b/ee/spec/frontend/notes/components/note_actions_spec.js
@@ -31,7 +31,7 @@ describe('noteActions', () => {
       canReportAsAbuse: true,
       canResolve: true,
       noteId: '539',
-      noteUrl: `${TEST_HOST}/group/project/merge_requests/1#note_1`,
+      noteUrl: `${TEST_HOST}/group/project/-/merge_requests/1#note_1`,
       reportAbusePath: `${TEST_HOST}/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F7%23note_539&user_id=26`,
       showReply: false,
       isDraft: true,
diff --git a/ee/spec/frontend/notes/mock_data.js b/ee/spec/frontend/notes/mock_data.js
index 6d5bfe217d6f5f865027ed292e2650deab4f74c0..71de1ed4b6df2ffd1a01ccfc7f78bae80caafdf1 100644
--- a/ee/spec/frontend/notes/mock_data.js
+++ b/ee/spec/frontend/notes/mock_data.js
@@ -52,7 +52,7 @@ export const noteableDataMock = {
   time_estimate: 0,
   title: '14',
   total_time_spent: 0,
-  noteable_note_url: '/group/project/merge_requests/1#note_1',
+  noteable_note_url: '/group/project/-/merge_requests/1#note_1',
   updated_at: '2017-08-04T09:53:01.226Z',
   updated_by_id: 1,
   web_url: '/gitlab-org/gitlab-foss/issues/26',
@@ -101,8 +101,8 @@ export const individualNote = {
         { name: 'art', user: { id: 1, name: 'Root', username: 'root' } },
       ],
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1390/toggle_award_emoji',
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
-      note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
+      note_url: '/group/project/-/merge_requests/1#note_1',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F26%23note_1390&user_id=1',
       path: '/gitlab-org/gitlab-foss/notes/1390',
@@ -161,8 +161,8 @@ export const note = {
     },
   ],
   toggle_award_path: '/gitlab-org/gitlab-foss/notes/546/toggle_award_emoji',
-  note_url: '/group/project/merge_requests/1#note_1',
-  noteable_note_url: '/group/project/merge_requests/1#note_1',
+  note_url: '/group/project/-/merge_requests/1#note_1',
+  noteable_note_url: '/group/project/-/merge_requests/1#note_1',
   report_abuse_path:
     '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F7%23note_546&user_id=1',
   path: '/gitlab-org/gitlab-foss/notes/546',
@@ -204,7 +204,7 @@ export const discussionMock = {
       discussion_id: '9e3bd2f71a01de45fd166e6719eb380ad9f270b1',
       emoji_awardable: true,
       award_emoji: [],
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1395/toggle_award_emoji',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F26%23note_1395&user_id=1',
@@ -251,7 +251,7 @@ export const discussionMock = {
       emoji_awardable: true,
       award_emoji: [],
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1396/toggle_award_emoji',
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F26%23note_1396&user_id=1',
       path: '/gitlab-org/gitlab-foss/notes/1396',
@@ -296,7 +296,7 @@ export const discussionMock = {
       discussion_id: '9e3bd2f71a01de45fd166e6719eb380ad9f270b1',
       emoji_awardable: true,
       award_emoji: [],
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1437/toggle_award_emoji',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F26%23note_1437&user_id=1',
@@ -346,7 +346,7 @@ export const loggedOutnoteableData = {
     can_create_note: false,
     can_update: false,
   },
-  noteable_note_url: '/group/project/merge_requests/1#note_1',
+  noteable_note_url: '/group/project/-/merge_requests/1#note_1',
   create_note_path: '/gitlab-org/gitlab-foss/notes?target_id=98&target_type=issue',
   preview_note_path: '/gitlab-org/gitlab-foss/preview_markdown?target_id=98&target_type=Issue',
 };
@@ -480,7 +480,7 @@ export const INDIVIDUAL_NOTE_RESPONSE_MAP = {
                 },
               },
             ],
-            noteable_note_url: '/group/project/merge_requests/1#note_1',
+            noteable_note_url: '/group/project/-/merge_requests/1#note_1',
             toggle_award_path: '/gitlab-org/gitlab-foss/notes/1390/toggle_award_emoji',
             report_abuse_path:
               '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F26%23note_1390\u0026user_id=1',
@@ -525,7 +525,7 @@ export const INDIVIDUAL_NOTE_RESPONSE_MAP = {
             discussion_id: '70d5c92a4039a36c70100c6691c18c27e4b0a790',
             emoji_awardable: true,
             award_emoji: [],
-            noteable_note_url: '/group/project/merge_requests/1#note_1',
+            noteable_note_url: '/group/project/-/merge_requests/1#note_1',
             toggle_award_path: '/gitlab-org/gitlab-foss/notes/1391/toggle_award_emoji',
             report_abuse_path:
               '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F26%23note_1391\u0026user_id=1',
@@ -580,7 +580,7 @@ export const INDIVIDUAL_NOTE_RESPONSE_MAP = {
       discussion_id: 'a3ed36e29b1957efb3b68c53e2d7a2b24b1df052',
       emoji_awardable: true,
       award_emoji: [],
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1471/toggle_award_emoji',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F29%23note_1471\u0026user_id=1',
@@ -632,7 +632,7 @@ export const DISCUSSION_NOTE_RESPONSE_MAP = {
             emoji_awardable: true,
             award_emoji: [],
             toggle_award_path: '/gitlab-org/gitlab-foss/notes/1471/toggle_award_emoji',
-            noteable_note_url: '/group/project/merge_requests/1#note_1',
+            noteable_note_url: '/group/project/-/merge_requests/1#note_1',
             report_abuse_path:
               '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-foss%2Fissues%2F29%23note_1471\u0026user_id=1',
             path: '/gitlab-org/gitlab-foss/notes/1471',
diff --git a/ee/spec/models/project_services/chat_message/merge_message_spec.rb b/ee/spec/models/project_services/chat_message/merge_message_spec.rb
index 7fe6922af6ec2d03031fee08ea6d1f3301641f26..60853d0d728e568dbd4c47fb48de8def79a46b19 100644
--- a/ee/spec/models/project_services/chat_message/merge_message_spec.rb
+++ b/ee/spec/models/project_services/chat_message/merge_message_spec.rb
@@ -36,7 +36,7 @@
 
     it 'returns a message regarding completed approval of merge requests' do
       expect(subject.pretext).to eq(
-        'Test User (test.user) approved <http://somewhere.com/merge_requests/100|!100 *Merge Request title*> '\
+        'Test User (test.user) approved <http://somewhere.com/-/merge_requests/100|!100 *Merge Request title*> '\
         'in <http://somewhere.com|project_name>')
       expect(subject.attachments).to be_empty
     end
@@ -49,7 +49,7 @@
 
     it 'returns a message regarding revocation of completed approval of merge requests' do
       expect(subject.pretext).to eq(
-        'Test User (test.user) unapproved <http://somewhere.com/merge_requests/100|!100 *Merge Request title*> '\
+        'Test User (test.user) unapproved <http://somewhere.com/-/merge_requests/100|!100 *Merge Request title*> '\
         'in <http://somewhere.com|project_name>')
       expect(subject.attachments).to be_empty
     end
@@ -62,7 +62,7 @@
 
     it 'returns a message regarding added approval of merge requests' do
       expect(subject.pretext).to eq(
-        'Test User (test.user) added their approval to <http://somewhere.com/merge_requests/100|!100 *Merge Request title*> '\
+        'Test User (test.user) added their approval to <http://somewhere.com/-/merge_requests/100|!100 *Merge Request title*> '\
         'in <http://somewhere.com|project_name>')
       expect(subject.attachments).to be_empty
     end
@@ -75,7 +75,7 @@
 
     it 'returns a message regarding revoking approval of merge requests' do
       expect(subject.pretext).to eq(
-        'Test User (test.user) removed their approval from <http://somewhere.com/merge_requests/100|!100 *Merge Request title*> '\
+        'Test User (test.user) removed their approval from <http://somewhere.com/-/merge_requests/100|!100 *Merge Request title*> '\
         'in <http://somewhere.com|project_name>')
       expect(subject.attachments).to be_empty
     end
diff --git a/ee/spec/presenters/merge_request_presenter_spec.rb b/ee/spec/presenters/merge_request_presenter_spec.rb
index 19e14ea5f7e38def3610a441b7a855cf72c78b7b..08f3796453a694bcf2a88ac30c15a4c00cb53e55 100644
--- a/ee/spec/presenters/merge_request_presenter_spec.rb
+++ b/ee/spec/presenters/merge_request_presenter_spec.rb
@@ -36,7 +36,7 @@
 
     it_behaves_like 'is nil when needed'
 
-    it { is_expected.to eq(expose_path("/#{merge_request.project.full_path}/merge_requests/#{merge_request.iid}/approvals")) }
+    it { is_expected.to eq(expose_path("/#{merge_request.project.full_path}/-/merge_requests/#{merge_request.iid}/approvals")) }
   end
 
   describe '#api_approvals_path' do
diff --git a/spec/frontend/notes/mock_data.js b/spec/frontend/notes/mock_data.js
index 01cb70d395cbcd8d589f29dfe8cf00b4d20f4310..9ed79c61c22f24abb0e7b0933acb1586c4aa8724 100644
--- a/spec/frontend/notes/mock_data.js
+++ b/spec/frontend/notes/mock_data.js
@@ -52,7 +52,7 @@ export const noteableDataMock = {
   time_estimate: 0,
   title: '14',
   total_time_spent: 0,
-  noteable_note_url: '/group/project/merge_requests/1#note_1',
+  noteable_note_url: '/group/project/-/merge_requests/1#note_1',
   updated_at: '2017-08-04T09:53:01.226Z',
   updated_by_id: 1,
   web_url: '/gitlab-org/gitlab-foss/issues/26',
@@ -101,8 +101,8 @@ export const individualNote = {
         { name: 'art', user: { id: 1, name: 'Root', username: 'root' } },
       ],
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1390/toggle_award_emoji',
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
-      note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
+      note_url: '/group/project/-/merge_requests/1#note_1',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F26%23note_1390&user_id=1',
       path: '/gitlab-org/gitlab-foss/notes/1390',
@@ -161,8 +161,8 @@ export const note = {
     },
   ],
   toggle_award_path: '/gitlab-org/gitlab-foss/notes/546/toggle_award_emoji',
-  note_url: '/group/project/merge_requests/1#note_1',
-  noteable_note_url: '/group/project/merge_requests/1#note_1',
+  note_url: '/group/project/-/merge_requests/1#note_1',
+  noteable_note_url: '/group/project/-/merge_requests/1#note_1',
   report_abuse_path:
     '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F7%23note_546&user_id=1',
   path: '/gitlab-org/gitlab-foss/notes/546',
@@ -205,7 +205,7 @@ export const discussionMock = {
       discussion_id: '9e3bd2f71a01de45fd166e6719eb380ad9f270b1',
       emoji_awardable: true,
       award_emoji: [],
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1395/toggle_award_emoji',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F26%23note_1395&user_id=1',
@@ -253,7 +253,7 @@ export const discussionMock = {
       emoji_awardable: true,
       award_emoji: [],
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1396/toggle_award_emoji',
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F26%23note_1396&user_id=1',
       path: '/gitlab-org/gitlab-foss/notes/1396',
@@ -299,7 +299,7 @@ export const discussionMock = {
       discussion_id: '9e3bd2f71a01de45fd166e6719eb380ad9f270b1',
       emoji_awardable: true,
       award_emoji: [],
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1437/toggle_award_emoji',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F26%23note_1437&user_id=1',
@@ -349,7 +349,7 @@ export const loggedOutnoteableData = {
     can_create_note: false,
     can_update: false,
   },
-  noteable_note_url: '/group/project/merge_requests/1#note_1',
+  noteable_note_url: '/group/project/-/merge_requests/1#note_1',
   create_note_path: '/gitlab-org/gitlab-foss/notes?target_id=98&target_type=issue',
   preview_note_path: '/gitlab-org/gitlab-foss/preview_markdown?target_id=98&target_type=Issue',
 };
@@ -483,7 +483,7 @@ export const INDIVIDUAL_NOTE_RESPONSE_MAP = {
                 },
               },
             ],
-            noteable_note_url: '/group/project/merge_requests/1#note_1',
+            noteable_note_url: '/group/project/-/merge_requests/1#note_1',
             toggle_award_path: '/gitlab-org/gitlab-foss/notes/1390/toggle_award_emoji',
             report_abuse_path:
               '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F26%23note_1390\u0026user_id=1',
@@ -528,7 +528,7 @@ export const INDIVIDUAL_NOTE_RESPONSE_MAP = {
             discussion_id: '70d5c92a4039a36c70100c6691c18c27e4b0a790',
             emoji_awardable: true,
             award_emoji: [],
-            noteable_note_url: '/group/project/merge_requests/1#note_1',
+            noteable_note_url: '/group/project/-/merge_requests/1#note_1',
             toggle_award_path: '/gitlab-org/gitlab-foss/notes/1391/toggle_award_emoji',
             report_abuse_path:
               '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F26%23note_1391\u0026user_id=1',
@@ -583,7 +583,7 @@ export const INDIVIDUAL_NOTE_RESPONSE_MAP = {
       discussion_id: 'a3ed36e29b1957efb3b68c53e2d7a2b24b1df052',
       emoji_awardable: true,
       award_emoji: [],
-      noteable_note_url: '/group/project/merge_requests/1#note_1',
+      noteable_note_url: '/group/project/-/merge_requests/1#note_1',
       toggle_award_path: '/gitlab-org/gitlab-foss/notes/1471/toggle_award_emoji',
       report_abuse_path:
         '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F29%23note_1471\u0026user_id=1',
@@ -635,7 +635,7 @@ export const DISCUSSION_NOTE_RESPONSE_MAP = {
             emoji_awardable: true,
             award_emoji: [],
             toggle_award_path: '/gitlab-org/gitlab-foss/notes/1471/toggle_award_emoji',
-            noteable_note_url: '/group/project/merge_requests/1#note_1',
+            noteable_note_url: '/group/project/-/merge_requests/1#note_1',
             report_abuse_path:
               '/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F29%23note_1471\u0026user_id=1',
             path: '/gitlab-org/gitlab-foss/notes/1471',
diff --git a/spec/helpers/award_emoji_helper_spec.rb b/spec/helpers/award_emoji_helper_spec.rb
index 2ad6b68a34ce024020b72a498a0b64253a620d29..975f32edd42e0ff0bc7942e057af8f5fa4cf56ea 100644
--- a/spec/helpers/award_emoji_helper_spec.rb
+++ b/spec/helpers/award_emoji_helper_spec.rb
@@ -51,7 +51,7 @@
       it 'returns correct url' do
         @project = merge_request.project
 
-        expected_url = "/#{@project.namespace.path}/#{@project.path}/merge_requests/#{merge_request.iid}/toggle_award_emoji"
+        expected_url = "/#{@project.namespace.path}/#{@project.path}/-/merge_requests/#{merge_request.iid}/toggle_award_emoji"
 
         expect(subject).to eq(expected_url)
       end
diff --git a/spec/helpers/events_helper_spec.rb b/spec/helpers/events_helper_spec.rb
index 7853617c3ed6f8b39d144e7594e055f151a5c28d..63a37a1f1134577427bcc0960302ce4a58d67baf 100644
--- a/spec/helpers/events_helper_spec.rb
+++ b/spec/helpers/events_helper_spec.rb
@@ -115,7 +115,7 @@
     it 'returns a merge request url' do
       event.target = create(:note_on_merge_request, note: 'LGTM!')
 
-      expect(subject).to eq("#{project_base_url}/merge_requests/#{event.note_target.iid}#note_#{event.target.id}")
+      expect(subject).to eq("#{project_base_url}/-/merge_requests/#{event.note_target.iid}#note_#{event.target.id}")
     end
   end
 end
diff --git a/spec/helpers/labels_helper_spec.rb b/spec/helpers/labels_helper_spec.rb
index 3238743ee26d3ae589d26286ec73b792beee8dac..e2dff05cfaa76e764ddcdb4dc87aaa59cd56b7cb 100644
--- a/spec/helpers/labels_helper_spec.rb
+++ b/spec/helpers/labels_helper_spec.rb
@@ -78,13 +78,21 @@
     end
 
     context 'with a type argument' do
-      ['issue', :issue, 'merge_request', :merge_request].each do |type|
+      ['issue', :issue].each do |type|
         context "set to #{type}" do
           it 'links to correct page' do
             expect(link_to_label(label_presenter, type: type)).to match %r{<a href="/#{label.project.full_path}/#{type.to_s.pluralize}\?label_name%5B%5D=#{label.name}">.*</a>}
           end
         end
       end
+
+      ['merge_request', :merge_request].each do |type|
+        context "set to #{type}" do
+          it 'links to correct page' do
+            expect(link_to_label(label_presenter, type: type)).to match %r{<a href="/#{label.project.full_path}/-/#{type.to_s.pluralize}\?label_name%5B%5D=#{label.name}">.*</a>}
+          end
+        end
+      end
     end
 
     context 'with a tooltip argument' do
diff --git a/spec/javascripts/ide/stores/modules/commit/actions_spec.js b/spec/javascripts/ide/stores/modules/commit/actions_spec.js
index cbc2401262f8423d69bfda6f18d999ed9eaaa092..557244e237e6ff9a452ef824bb77f92bc928918a 100644
--- a/spec/javascripts/ide/stores/modules/commit/actions_spec.js
+++ b/spec/javascripts/ide/stores/modules/commit/actions_spec.js
@@ -461,7 +461,7 @@ describe('IDE commit module actions', () => {
             .dispatch('commit/commitChanges')
             .then(() => {
               expect(visitUrl).toHaveBeenCalledWith(
-                `webUrl/merge_requests/new?merge_request[source_branch]=${
+                `webUrl/-/merge_requests/new?merge_request[source_branch]=${
                   store.getters['commit/placeholderBranchName']
                 }&merge_request[target_branch]=master&nav_source=webide`,
               );
diff --git a/spec/javascripts/jobs/components/stages_dropdown_spec.js b/spec/javascripts/jobs/components/stages_dropdown_spec.js
index e091aece5644538877f44405c05af1d3a3dcb97f..f1a015301045804d2da1d67ca443fb7fc33920e9 100644
--- a/spec/javascripts/jobs/components/stages_dropdown_spec.js
+++ b/spec/javascripts/jobs/components/stages_dropdown_spec.js
@@ -27,7 +27,7 @@ describe('Stages Dropdown', () => {
     },
     merge_request: {
       iid: 1234,
-      path: '/root/detached-merge-request-pipelines/merge_requests/1',
+      path: '/root/detached-merge-request-pipelines/-/merge_requests/1',
       title: 'Update README.md',
       source_branch: 'feature-1234',
       source_branch_path: '/root/detached-merge-request-pipelines/branches/feature-1234',
diff --git a/spec/javascripts/merge_request_spec.js b/spec/javascripts/merge_request_spec.js
index dc61482fdf30ca6d6a4143f2ff5eeefdb241e9f7..b6173b9b171739f080b234683116d3ecb9494e83 100644
--- a/spec/javascripts/merge_request_spec.js
+++ b/spec/javascripts/merge_request_spec.js
@@ -17,7 +17,7 @@ describe('MergeRequest', function() {
       mock = new MockAdapter(axios);
 
       mock
-        .onPatch(`${gl.TEST_HOST}/frontend-fixtures/merge-requests-project/merge_requests/1.json`)
+        .onPatch(`${gl.TEST_HOST}/frontend-fixtures/merge-requests-project/-/merge_requests/1.json`)
         .reply(200, {});
 
       this.merge = new MergeRequest();
@@ -75,7 +75,7 @@ describe('MergeRequest', function() {
 
         setTimeout(() => {
           expect(axios.patch).toHaveBeenCalledWith(
-            `${gl.TEST_HOST}/frontend-fixtures/merge-requests-project/merge_requests/1.json`,
+            `${gl.TEST_HOST}/frontend-fixtures/merge-requests-project/-/merge_requests/1.json`,
             {
               merge_request: {
                 description: '- [ ] Task List Item\n- [ ]   \n- [ ] Task List Item 2\n',
@@ -93,7 +93,9 @@ describe('MergeRequest', function() {
       // eslint-disable-next-line jasmine/no-disabled-tests
       xit('shows an error notification when tasklist update failed', done => {
         mock
-          .onPatch(`${gl.TEST_HOST}/frontend-fixtures/merge-requests-project/merge_requests/1.json`)
+          .onPatch(
+            `${gl.TEST_HOST}/frontend-fixtures/merge-requests-project/-/merge_requests/1.json`,
+          )
           .reply(409, {});
 
         $('.js-task-list-field').trigger({
diff --git a/spec/javascripts/merge_request_tabs_spec.js b/spec/javascripts/merge_request_tabs_spec.js
index 73b1ea4d36f0e7772ac64f579125820d6a5aa9cd..1672cf6948573f4b549cb1ec95808a02fdafbf84 100644
--- a/spec/javascripts/merge_request_tabs_spec.js
+++ b/spec/javascripts/merge_request_tabs_spec.js
@@ -147,53 +147,53 @@ describe('MergeRequestTabs', function() {
 
     it('changes from commits', function() {
       setLocation({
-        pathname: '/foo/bar/merge_requests/1/commits',
+        pathname: '/foo/bar/-/merge_requests/1/commits',
       });
 
-      expect(this.subject('show')).toBe('/foo/bar/merge_requests/1');
-      expect(this.subject('diffs')).toBe('/foo/bar/merge_requests/1/diffs');
+      expect(this.subject('show')).toBe('/foo/bar/-/merge_requests/1');
+      expect(this.subject('diffs')).toBe('/foo/bar/-/merge_requests/1/diffs');
     });
 
     it('changes from diffs', function() {
       setLocation({
-        pathname: '/foo/bar/merge_requests/1/diffs',
+        pathname: '/foo/bar/-/merge_requests/1/diffs',
       });
 
-      expect(this.subject('show')).toBe('/foo/bar/merge_requests/1');
-      expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
+      expect(this.subject('show')).toBe('/foo/bar/-/merge_requests/1');
+      expect(this.subject('commits')).toBe('/foo/bar/-/merge_requests/1/commits');
     });
 
     it('changes from diffs.html', function() {
       setLocation({
-        pathname: '/foo/bar/merge_requests/1/diffs.html',
+        pathname: '/foo/bar/-/merge_requests/1/diffs.html',
       });
 
-      expect(this.subject('show')).toBe('/foo/bar/merge_requests/1');
-      expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
+      expect(this.subject('show')).toBe('/foo/bar/-/merge_requests/1');
+      expect(this.subject('commits')).toBe('/foo/bar/-/merge_requests/1/commits');
     });
 
     it('changes from notes', function() {
       setLocation({
-        pathname: '/foo/bar/merge_requests/1',
+        pathname: '/foo/bar/-/merge_requests/1',
       });
 
-      expect(this.subject('diffs')).toBe('/foo/bar/merge_requests/1/diffs');
-      expect(this.subject('commits')).toBe('/foo/bar/merge_requests/1/commits');
+      expect(this.subject('diffs')).toBe('/foo/bar/-/merge_requests/1/diffs');
+      expect(this.subject('commits')).toBe('/foo/bar/-/merge_requests/1/commits');
     });
 
     it('includes search parameters and hash string', function() {
       setLocation({
-        pathname: '/foo/bar/merge_requests/1/diffs',
+        pathname: '/foo/bar/-/merge_requests/1/diffs',
         search: '?view=parallel',
         hash: '#L15-35',
       });
 
-      expect(this.subject('show')).toBe('/foo/bar/merge_requests/1?view=parallel#L15-35');
+      expect(this.subject('show')).toBe('/foo/bar/-/merge_requests/1?view=parallel#L15-35');
     });
 
     it('replaces the current history state', function() {
       setLocation({
-        pathname: '/foo/bar/merge_requests/1',
+        pathname: '/foo/bar/-/merge_requests/1',
       });
       const newState = this.subject('commits');
 
@@ -208,10 +208,10 @@ describe('MergeRequestTabs', function() {
 
     it('treats "show" like "notes"', function() {
       setLocation({
-        pathname: '/foo/bar/merge_requests/1/commits',
+        pathname: '/foo/bar/-/merge_requests/1/commits',
       });
 
-      expect(this.subject('show')).toBe('/foo/bar/merge_requests/1');
+      expect(this.subject('show')).toBe('/foo/bar/-/merge_requests/1');
     });
   });
 
diff --git a/spec/javascripts/notes/components/note_actions_spec.js b/spec/javascripts/notes/components/note_actions_spec.js
index 2e0694869ba96ac60b9228da10d4e29465357675..a65e2fc31ad50891e4079832c503f94e47081930 100644
--- a/spec/javascripts/notes/components/note_actions_spec.js
+++ b/spec/javascripts/notes/components/note_actions_spec.js
@@ -30,7 +30,7 @@ describe('noteActions', () => {
       canAwardEmoji: true,
       canReportAsAbuse: true,
       noteId: '539',
-      noteUrl: `${TEST_HOST}/group/project/merge_requests/1#note_1`,
+      noteUrl: `${TEST_HOST}/group/project/-/merge_requests/1#note_1`,
       reportAbusePath: `${TEST_HOST}/abuse_reports/new?ref_url=http%3A%2F%2Flocalhost%3A3000%2Fgitlab-org%2Fgitlab-ce%2Fissues%2F7%23note_539&user_id=26`,
       showReply: false,
     };
diff --git a/spec/lib/banzai/filter/relative_link_filter_spec.rb b/spec/lib/banzai/filter/relative_link_filter_spec.rb
index a17a645d4d0055bf6530252952afa72b388a18e6..1efca647b8ba942dc5a8c451757155bd44ab2d08 100644
--- a/spec/lib/banzai/filter/relative_link_filter_spec.rb
+++ b/spec/lib/banzai/filter/relative_link_filter_spec.rb
@@ -157,7 +157,7 @@ def allow_gitaly_n_plus_1
     end
 
     it 'does not modify relative URLs in system notes' do
-      path = "#{project_path}/merge_requests/1/diffs"
+      path = "#{project_path}/-/merge_requests/1/diffs"
       doc = filter(link(path), system_note: true)
 
       expect(doc.at_css('a')['href']).to eq path
diff --git a/spec/lib/gitlab/data_builder/pipeline_spec.rb b/spec/lib/gitlab/data_builder/pipeline_spec.rb
index 635bf56b72e24605e0e141f01d02f7b6769c8b9f..86ab7f888caddf1d97cb72bbe33c7a5bbe957f0d 100644
--- a/spec/lib/gitlab/data_builder/pipeline_spec.rb
+++ b/spec/lib/gitlab/data_builder/pipeline_spec.rb
@@ -77,7 +77,7 @@
         expect(merge_request_attrs[:target_project_id]).to eq(merge_request.target_project_id)
         expect(merge_request_attrs[:state]).to eq(merge_request.state)
         expect(merge_request_attrs[:merge_status]).to eq(merge_request.merge_status)
-        expect(merge_request_attrs[:url]).to eq("http://localhost/#{merge_request.target_project.full_path}/merge_requests/#{merge_request.iid}")
+        expect(merge_request_attrs[:url]).to eq("http://localhost/#{merge_request.target_project.full_path}/-/merge_requests/#{merge_request.iid}")
       end
     end
   end
diff --git a/spec/lib/gitlab/url_builder_spec.rb b/spec/lib/gitlab/url_builder_spec.rb
index 0aab02b6c4cc46737e25d00c9993e25e0fffbbeb..d349c2928b0649e63f9541a9baf8ef28c6e56a82 100644
--- a/spec/lib/gitlab/url_builder_spec.rb
+++ b/spec/lib/gitlab/url_builder_spec.rb
@@ -55,7 +55,7 @@
 
         url = described_class.build(merge_request)
 
-        expect(url).to eq "#{Settings.gitlab['url']}/#{merge_request.project.full_path}/merge_requests/#{merge_request.iid}"
+        expect(url).to eq "#{Settings.gitlab['url']}/#{merge_request.project.full_path}/-/merge_requests/#{merge_request.iid}"
       end
     end
 
@@ -118,7 +118,7 @@
 
           url = described_class.build(note)
 
-          expect(url).to eq "#{Settings.gitlab['url']}/#{merge_request.project.full_path}/merge_requests/#{merge_request.iid}#note_#{note.id}"
+          expect(url).to eq "#{Settings.gitlab['url']}/#{merge_request.project.full_path}/-/merge_requests/#{merge_request.iid}#note_#{note.id}"
         end
       end
 
@@ -129,7 +129,7 @@
 
           url = described_class.build(note)
 
-          expect(url).to eq "#{Settings.gitlab['url']}/#{merge_request.project.full_path}/merge_requests/#{merge_request.iid}#note_#{note.id}"
+          expect(url).to eq "#{Settings.gitlab['url']}/#{merge_request.project.full_path}/-/merge_requests/#{merge_request.iid}#note_#{note.id}"
         end
       end
 
diff --git a/spec/models/project_services/chat_message/merge_message_spec.rb b/spec/models/project_services/chat_message/merge_message_spec.rb
index b56eb19dd5535fda21c9ced46ba21f5272ab580c..150ee6f7472545ded75c99c4b4c4c34f17dbce35 100644
--- a/spec/models/project_services/chat_message/merge_message_spec.rb
+++ b/spec/models/project_services/chat_message/merge_message_spec.rb
@@ -52,7 +52,7 @@
     context 'open' do
       it 'returns a message regarding opening of merge requests' do
         expect(subject.pretext).to eq(
-          'Test User (test.user) opened <http://somewhere.com/merge_requests/100|!100 *Merge Request title*> in <http://somewhere.com|project_name>')
+          'Test User (test.user) opened <http://somewhere.com/-/merge_requests/100|!100 *Merge Request title*> in <http://somewhere.com|project_name>')
         expect(subject.attachments).to be_empty
       end
     end
@@ -63,7 +63,7 @@
       end
       it 'returns a message regarding closing of merge requests' do
         expect(subject.pretext).to eq(
-          'Test User (test.user) closed <http://somewhere.com/merge_requests/100|!100 *Merge Request title*> in <http://somewhere.com|project_name>')
+          'Test User (test.user) closed <http://somewhere.com/-/merge_requests/100|!100 *Merge Request title*> in <http://somewhere.com|project_name>')
         expect(subject.attachments).to be_empty
       end
     end
@@ -77,12 +77,12 @@
     context 'open' do
       it 'returns a message regarding opening of merge requests' do
         expect(subject.pretext).to eq(
-          'Test User (test.user) opened [!100 *Merge Request title*](http://somewhere.com/merge_requests/100) in [project_name](http://somewhere.com)')
+          'Test User (test.user) opened [!100 *Merge Request title*](http://somewhere.com/-/merge_requests/100) in [project_name](http://somewhere.com)')
         expect(subject.attachments).to be_empty
         expect(subject.activity).to eq({
           title: 'Merge Request opened by Test User (test.user)',
           subtitle: 'in [project_name](http://somewhere.com)',
-          text: '[!100 *Merge Request title*](http://somewhere.com/merge_requests/100)',
+          text: '[!100 *Merge Request title*](http://somewhere.com/-/merge_requests/100)',
           image: 'http://someavatar.com'
         })
       end
@@ -95,12 +95,12 @@
 
       it 'returns a message regarding closing of merge requests' do
         expect(subject.pretext).to eq(
-          'Test User (test.user) closed [!100 *Merge Request title*](http://somewhere.com/merge_requests/100) in [project_name](http://somewhere.com)')
+          'Test User (test.user) closed [!100 *Merge Request title*](http://somewhere.com/-/merge_requests/100) in [project_name](http://somewhere.com)')
         expect(subject.attachments).to be_empty
         expect(subject.activity).to eq({
           title: 'Merge Request closed by Test User (test.user)',
           subtitle: 'in [project_name](http://somewhere.com)',
-          text: '[!100 *Merge Request title*](http://somewhere.com/merge_requests/100)',
+          text: '[!100 *Merge Request title*](http://somewhere.com/-/merge_requests/100)',
           image: 'http://someavatar.com'
         })
       end
diff --git a/spec/presenters/merge_request_presenter_spec.rb b/spec/presenters/merge_request_presenter_spec.rb
index ce437090d43909a8f4ec250b2dc305eb1968b77e..6ce6f84cf61448981e19a57404ae6585444c6a51 100644
--- a/spec/presenters/merge_request_presenter_spec.rb
+++ b/spec/presenters/merge_request_presenter_spec.rb
@@ -101,7 +101,7 @@
         allow(presenter).to receive_message_chain(:conflicts, :can_be_resolved_by?).with(user) { true }
 
         expect(path)
-          .to eq("/#{project.full_path}/merge_requests/#{resource.iid}/conflicts")
+          .to eq("/#{project.full_path}/-/merge_requests/#{resource.iid}/conflicts")
       end
     end
   end
@@ -179,7 +179,7 @@
 
         it 'returns correct link with correct text' do
           is_expected
-            .to match("#{project.full_path}/merge_requests/#{resource.iid}/assign_related_issues")
+            .to match("#{project.full_path}/-/merge_requests/#{resource.iid}/assign_related_issues")
 
           is_expected
             .to match("Assign yourself to this issue")
@@ -192,7 +192,7 @@
 
         it 'returns correct link with correct text' do
           is_expected
-            .to match("#{project.full_path}/merge_requests/#{resource.iid}/assign_related_issues")
+            .to match("#{project.full_path}/-/merge_requests/#{resource.iid}/assign_related_issues")
 
           is_expected
             .to match("Assign yourself to these issues")
@@ -221,7 +221,7 @@
           .with(user)
           .and_return(true)
 
-        is_expected.to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}/cancel_auto_merge")
+        is_expected.to eq("/#{resource.project.full_path}/-/merge_requests/#{resource.iid}/cancel_auto_merge")
       end
     end
 
@@ -248,7 +248,7 @@
           .and_return(true)
 
         is_expected
-          .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}/merge")
+          .to eq("/#{resource.project.full_path}/-/merge_requests/#{resource.iid}/merge")
       end
     end
 
@@ -312,7 +312,7 @@
         project.add_maintainer(user)
 
         is_expected
-          .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}/remove_wip")
+          .to eq("/#{resource.project.full_path}/-/merge_requests/#{resource.iid}/remove_wip")
       end
     end
 
@@ -535,7 +535,7 @@
 
       it 'returns path' do
         is_expected
-          .to eq("/#{project.full_path}/merge_requests/#{resource.iid}/rebase")
+          .to eq("/#{project.full_path}/-/merge_requests/#{resource.iid}/rebase")
       end
     end
 
diff --git a/spec/requests/api/internal/base_spec.rb b/spec/requests/api/internal/base_spec.rb
index ecbb81294a0c193fdec671de524a1a67f2fd5bfb..d38b7eafe97f8683eb7fee65c2847b6e4680ef9b 100644
--- a/spec/requests/api/internal/base_spec.rb
+++ b/spec/requests/api/internal/base_spec.rb
@@ -852,7 +852,7 @@
 
       message = <<~MESSAGE.strip
         To create a merge request for #{branch_name}, visit:
-          http://#{Gitlab.config.gitlab.host}/#{project.full_path}/merge_requests/new?merge_request%5Bsource_branch%5D=#{branch_name}
+          http://#{Gitlab.config.gitlab.host}/#{project.full_path}/-/merge_requests/new?merge_request%5Bsource_branch%5D=#{branch_name}
       MESSAGE
 
       expect(json_response['messages']).to include(build_basic_message(message))
@@ -909,7 +909,7 @@
 
         message = <<~MESSAGE.strip
           View merge request for #{branch_name}:
-            http://#{Gitlab.config.gitlab.host}/#{project.full_path}/merge_requests/1
+            http://#{Gitlab.config.gitlab.host}/#{project.full_path}/-/merge_requests/1
         MESSAGE
 
         expect(json_response['messages']).to include(build_basic_message(message))
diff --git a/spec/requests/api/releases_spec.rb b/spec/requests/api/releases_spec.rb
index da04e8527951afe13b78745f4875b5a5764a910b..534dced16bfb62e1dcbcdae6c543f2d6a62d327e 100644
--- a/spec/requests/api/releases_spec.rb
+++ b/spec/requests/api/releases_spec.rb
@@ -76,7 +76,7 @@
         mr_uri = URI.parse(links['merge_requests_url'])
         issue_uri = URI.parse(links['issues_url'])
 
-        expect(mr_uri.path).to eq("#{path_base}/merge_requests")
+        expect(mr_uri.path).to eq("#{path_base}/-/merge_requests")
         expect(issue_uri.path).to eq("#{path_base}/issues")
         expect(mr_uri.query).to eq(expected_query)
         expect(issue_uri.query).to eq(expected_query)
diff --git a/spec/requests/projects/merge_requests_discussions_spec.rb b/spec/requests/projects/merge_requests_discussions_spec.rb
index 5945561aa7b6b8591b55f4469b3137fa5daaf9ce..ffc98d09e5c6e8d4e7573f4834cf1c0add1a1d65 100644
--- a/spec/requests/projects/merge_requests_discussions_spec.rb
+++ b/spec/requests/projects/merge_requests_discussions_spec.rb
@@ -4,7 +4,7 @@
 
 describe 'merge requests discussions' do
   # Further tests can be found at merge_requests_controller_spec.rb
-  describe 'GET /:namespace/:project/merge_requests/:iid/discussions' do
+  describe 'GET /:namespace/:project/-/merge_requests/:iid/discussions' do
     let(:project) { create(:project, :repository) }
     let(:user) { project.owner }
     let(:merge_request) { create(:merge_request_with_diffs, target_project: project, source_project: project) }
diff --git a/spec/requests/user_activity_spec.rb b/spec/requests/user_activity_spec.rb
index 15666e00b9fac8dc802a53ef1af47eae200cd3f3..3cd4911098a45cdccf8fee1d212f14f36f06ff2a 100644
--- a/spec/requests/user_activity_spec.rb
+++ b/spec/requests/user_activity_spec.rb
@@ -26,8 +26,8 @@
     '/dashboard/todos',
     '/group/project/issues',
     '/group/project/issues/10',
-    '/group/project/merge_requests',
-    '/group/project/merge_requests/15'
+    '/group/project/-/merge_requests',
+    '/group/project/-/merge_requests/15'
   ]
 
   context 'without an authenticated user' do
diff --git a/spec/routing/project_routing_spec.rb b/spec/routing/project_routing_spec.rb
index 287db20448aca0b5646a28c15b006102f9fdb6e3..96956d85de43db02868f62987a3d034e01f94c67 100644
--- a/spec/routing/project_routing_spec.rb
+++ b/spec/routing/project_routing_spec.rb
@@ -292,71 +292,77 @@
 
   describe Projects::MergeRequestsController, 'routing' do
     it 'to #commits' do
-      expect(get('/gitlab/gitlabhq/merge_requests/1/commits.json')).to route_to('projects/merge_requests#commits', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'json')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1/commits.json')).to route_to('projects/merge_requests#commits', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'json')
     end
 
     it 'to #pipelines' do
-      expect(get('/gitlab/gitlabhq/merge_requests/1/pipelines.json')).to route_to('projects/merge_requests#pipelines', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'json')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1/pipelines.json')).to route_to('projects/merge_requests#pipelines', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'json')
     end
 
     it 'to #merge' do
-      expect(post('/gitlab/gitlabhq/merge_requests/1/merge')).to route_to(
+      expect(post('/gitlab/gitlabhq/-/merge_requests/1/merge')).to route_to(
         'projects/merge_requests#merge',
         namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1'
       )
     end
 
     it 'to #show' do
-      expect(get('/gitlab/gitlabhq/merge_requests/1.diff')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'diff')
-      expect(get('/gitlab/gitlabhq/merge_requests/1.patch')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'patch')
-      expect(get('/gitlab/gitlabhq/merge_requests/1/diffs')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', tab: 'diffs')
-      expect(get('/gitlab/gitlabhq/merge_requests/1/commits')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', tab: 'commits')
-      expect(get('/gitlab/gitlabhq/merge_requests/1/pipelines')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', tab: 'pipelines')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1.diff')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'diff')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1.patch')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'patch')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1/diffs')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', tab: 'diffs')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1/commits')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', tab: 'commits')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1/pipelines')).to route_to('projects/merge_requests#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', tab: 'pipelines')
     end
 
     it_behaves_like 'RESTful project resources' do
       let(:controller) { 'merge_requests' }
       let(:actions) { [:index, :edit, :show, :update] }
+      let(:controller_path) { '/-/merge_requests' }
     end
+
+    it_behaves_like 'redirecting a legacy project path', "/gitlab/gitlabhq/merge_requests", "/gitlab/gitlabhq/-/merge_requests"
+    it_behaves_like 'redirecting a legacy project path', "/gitlab/gitlabhq/merge_requests/1/diffs", "/gitlab/gitlabhq/-/merge_requests/1/diffs"
   end
 
   describe Projects::MergeRequests::CreationsController, 'routing' do
     it 'to #new' do
-      expect(get('/gitlab/gitlabhq/merge_requests/new')).to route_to('projects/merge_requests/creations#new', namespace_id: 'gitlab', project_id: 'gitlabhq')
-      expect(get('/gitlab/gitlabhq/merge_requests/new/diffs')).to route_to('projects/merge_requests/creations#new', namespace_id: 'gitlab', project_id: 'gitlabhq', tab: 'diffs')
-      expect(get('/gitlab/gitlabhq/merge_requests/new/pipelines')).to route_to('projects/merge_requests/creations#new', namespace_id: 'gitlab', project_id: 'gitlabhq', tab: 'pipelines')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/new')).to route_to('projects/merge_requests/creations#new', namespace_id: 'gitlab', project_id: 'gitlabhq')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/new/diffs')).to route_to('projects/merge_requests/creations#new', namespace_id: 'gitlab', project_id: 'gitlabhq', tab: 'diffs')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/new/pipelines')).to route_to('projects/merge_requests/creations#new', namespace_id: 'gitlab', project_id: 'gitlabhq', tab: 'pipelines')
     end
 
     it 'to #create' do
-      expect(post('/gitlab/gitlabhq/merge_requests')).to route_to('projects/merge_requests/creations#create', namespace_id: 'gitlab', project_id: 'gitlabhq')
+      expect(post('/gitlab/gitlabhq/-/merge_requests')).to route_to('projects/merge_requests/creations#create', namespace_id: 'gitlab', project_id: 'gitlabhq')
     end
 
     it 'to #branch_from' do
-      expect(get('/gitlab/gitlabhq/merge_requests/new/branch_from')).to route_to('projects/merge_requests/creations#branch_from', namespace_id: 'gitlab', project_id: 'gitlabhq')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/new/branch_from')).to route_to('projects/merge_requests/creations#branch_from', namespace_id: 'gitlab', project_id: 'gitlabhq')
     end
 
     it 'to #branch_to' do
-      expect(get('/gitlab/gitlabhq/merge_requests/new/branch_to')).to route_to('projects/merge_requests/creations#branch_to', namespace_id: 'gitlab', project_id: 'gitlabhq')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/new/branch_to')).to route_to('projects/merge_requests/creations#branch_to', namespace_id: 'gitlab', project_id: 'gitlabhq')
     end
 
     it 'to #pipelines' do
-      expect(get('/gitlab/gitlabhq/merge_requests/new/pipelines.json')).to route_to('projects/merge_requests/creations#pipelines', namespace_id: 'gitlab', project_id: 'gitlabhq', format: 'json')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/new/pipelines.json')).to route_to('projects/merge_requests/creations#pipelines', namespace_id: 'gitlab', project_id: 'gitlabhq', format: 'json')
     end
 
     it 'to #diffs' do
-      expect(get('/gitlab/gitlabhq/merge_requests/new/diffs.json')).to route_to('projects/merge_requests/creations#diffs', namespace_id: 'gitlab', project_id: 'gitlabhq', format: 'json')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/new/diffs.json')).to route_to('projects/merge_requests/creations#diffs', namespace_id: 'gitlab', project_id: 'gitlabhq', format: 'json')
     end
+
+    it_behaves_like 'redirecting a legacy project path', "/gitlab/gitlabhq/merge_requests/new", "/gitlab/gitlabhq/-/merge_requests/new"
   end
 
   describe Projects::MergeRequests::DiffsController, 'routing' do
     it 'to #show' do
-      expect(get('/gitlab/gitlabhq/merge_requests/1/diffs.json')).to route_to('projects/merge_requests/diffs#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'json')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1/diffs.json')).to route_to('projects/merge_requests/diffs#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1', format: 'json')
     end
   end
 
   describe Projects::MergeRequests::ConflictsController, 'routing' do
     it 'to #show' do
-      expect(get('/gitlab/gitlabhq/merge_requests/1/conflicts')).to route_to('projects/merge_requests/conflicts#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1')
+      expect(get('/gitlab/gitlabhq/-/merge_requests/1/conflicts')).to route_to('projects/merge_requests/conflicts#show', namespace_id: 'gitlab', project_id: 'gitlabhq', id: '1')
     end
   end
   #  raw_project_snippet GET    /:project_id/snippets/:id/raw(.:format)  snippets#raw
diff --git a/spec/serializers/merge_request_widget_entity_spec.rb b/spec/serializers/merge_request_widget_entity_spec.rb
index 22232682be10cbf89fb6e6fe71b65bd38d50bca2..80f59ef90cabc8c345e49f015304daed418f2302 100644
--- a/spec/serializers/merge_request_widget_entity_spec.rb
+++ b/spec/serializers/merge_request_widget_entity_spec.rb
@@ -45,12 +45,12 @@
 
   it 'has email_patches_path' do
     expect(subject[:email_patches_path])
-      .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}.patch")
+      .to eq("/#{resource.project.full_path}/-/merge_requests/#{resource.iid}.patch")
   end
 
   it 'has plain_diff_path' do
     expect(subject[:plain_diff_path])
-      .to eq("/#{resource.project.full_path}/merge_requests/#{resource.iid}.diff")
+      .to eq("/#{resource.project.full_path}/-/merge_requests/#{resource.iid}.diff")
   end
 
   describe 'when source project is deleted' do
diff --git a/spec/serializers/paginated_diff_entity_spec.rb b/spec/serializers/paginated_diff_entity_spec.rb
index 7432e07231892d6bc3573e66a46d547dd1d87781..77569aaa4bcab2fd28cfb990f5a959ca8a09e2b7 100644
--- a/spec/serializers/paginated_diff_entity_spec.rb
+++ b/spec/serializers/paginated_diff_entity_spec.rb
@@ -26,7 +26,7 @@
     expect(subject[:pagination]).to eq(
       current_page: 2,
       next_page: 3,
-      next_page_href: "/#{merge_request.project.full_path}/merge_requests/#{merge_request.iid}/diffs_batch.json?page=3",
+      next_page_href: "/#{merge_request.project.full_path}/-/merge_requests/#{merge_request.iid}/diffs_batch.json?page=3",
       total_pages: 7
     )
   end
diff --git a/spec/services/ci/expire_pipeline_cache_service_spec.rb b/spec/services/ci/expire_pipeline_cache_service_spec.rb
index ff2d286465a2c5df04aa24ca29bcc12383ad0fd8..f7fc73d9f9c98db18a6cc16ac9cc99167ed3b3d1 100644
--- a/spec/services/ci/expire_pipeline_cache_service_spec.rb
+++ b/spec/services/ci/expire_pipeline_cache_service_spec.rb
@@ -11,7 +11,7 @@
   describe '#execute' do
     it 'invalidates Etag caching for project pipelines path' do
       pipelines_path = "/#{project.full_path}/pipelines.json"
-      new_mr_pipelines_path = "/#{project.full_path}/merge_requests/new.json"
+      new_mr_pipelines_path = "/#{project.full_path}/-/merge_requests/new.json"
       pipeline_path = "/#{project.full_path}/pipelines/#{pipeline.id}.json"
 
       expect_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch).with(pipelines_path)
@@ -24,7 +24,7 @@
     it 'invalidates Etag caching for merge request pipelines if pipeline runs on any commit of that source branch' do
       pipeline = create(:ci_empty_pipeline, status: 'created', project: project, ref: 'master')
       merge_request = create(:merge_request, source_project: project, source_branch: pipeline.ref)
-      merge_request_pipelines_path = "/#{project.full_path}/merge_requests/#{merge_request.iid}/pipelines.json"
+      merge_request_pipelines_path = "/#{project.full_path}/-/merge_requests/#{merge_request.iid}/pipelines.json"
 
       allow_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch)
       expect_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch).with(merge_request_pipelines_path)
diff --git a/spec/services/merge_requests/get_urls_service_spec.rb b/spec/services/merge_requests/get_urls_service_spec.rb
index dcb8c8080a1937f84698829c2ad89011bac208b9..8500aa2b85291596cca31e717ef3fed82bfa00ed 100644
--- a/spec/services/merge_requests/get_urls_service_spec.rb
+++ b/spec/services/merge_requests/get_urls_service_spec.rb
@@ -8,8 +8,8 @@
   let(:project) { create(:project, :public, :repository) }
   let(:service) { described_class.new(project) }
   let(:source_branch) { "merge-test" }
-  let(:new_merge_request_url) { "http://#{Gitlab.config.gitlab.host}/#{project.full_path}/merge_requests/new?merge_request%5Bsource_branch%5D=#{source_branch}" }
-  let(:show_merge_request_url) { "http://#{Gitlab.config.gitlab.host}/#{project.full_path}/merge_requests/#{merge_request.iid}" }
+  let(:new_merge_request_url) { "http://#{Gitlab.config.gitlab.host}/#{project.full_path}/-/merge_requests/new?merge_request%5Bsource_branch%5D=#{source_branch}" }
+  let(:show_merge_request_url) { "http://#{Gitlab.config.gitlab.host}/#{project.full_path}/-/merge_requests/#{merge_request.iid}" }
   let(:new_branch_changes) { "#{Gitlab::Git::BLANK_SHA} 570e7b2abdd848b95f2f578043fc23bd6f6fd24d refs/heads/#{source_branch}" }
   let(:deleted_branch_changes) { "d14d6c0abdd253381df51a723d58691b2ee1ab08 #{Gitlab::Git::BLANK_SHA} refs/heads/#{source_branch}" }
   let(:existing_branch_changes) { "d14d6c0abdd253381df51a723d58691b2ee1ab08 570e7b2abdd848b95f2f578043fc23bd6f6fd24d refs/heads/#{source_branch}" }
@@ -127,7 +127,7 @@
       let(:new_branch_changes) { "#{Gitlab::Git::BLANK_SHA} 570e7b2abdd848b95f2f578043fc23bd6f6fd24d refs/heads/new_branch" }
       let(:existing_branch_changes) { "d14d6c0abdd253381df51a723d58691b2ee1ab08 570e7b2abdd848b95f2f578043fc23bd6f6fd24d refs/heads/markdown" }
       let(:changes) { "#{new_branch_changes}\n#{existing_branch_changes}" }
-      let(:new_merge_request_url) { "http://#{Gitlab.config.gitlab.host}/#{project.full_path}/merge_requests/new?merge_request%5Bsource_branch%5D=new_branch" }
+      let(:new_merge_request_url) { "http://#{Gitlab.config.gitlab.host}/#{project.full_path}/-/merge_requests/new?merge_request%5Bsource_branch%5D=new_branch" }
 
       it 'returns 2 urls for both creating new and showing merge request' do
         result = service.execute(changes)
diff --git a/spec/services/system_note_service_spec.rb b/spec/services/system_note_service_spec.rb
index bb457217b3f13cd9515f44e286906e4bbbcb4031..fea3dbce518aae450f915713ab284159a84a11f0 100644
--- a/spec/services/system_note_service_spec.rb
+++ b/spec/services/system_note_service_spec.rb
@@ -328,7 +328,7 @@ def cross_reference(type, link_exists = false)
         url = if type == 'commit'
                 "#{Settings.gitlab.base_url}/#{project.namespace.path}/#{project.path}/commit/#{commit.id}"
               else
-                "#{Settings.gitlab.base_url}/#{project.namespace.path}/#{project.path}/merge_requests/#{merge_request.iid}"
+                "#{Settings.gitlab.base_url}/#{project.namespace.path}/#{project.path}/-/merge_requests/#{merge_request.iid}"
               end
 
         link = double(object: { 'url' => url })