diff --git a/app/helpers/submodule_helper.rb b/app/helpers/submodule_helper.rb
index e683e2959d16bf067c5c7a72b3c358d9fe8141c2..4b83988e8bb124cfad8b62a663c587e8a33316d1 100644
--- a/app/helpers/submodule_helper.rb
+++ b/app/helpers/submodule_helper.rb
@@ -81,7 +81,7 @@ def standard_links(host, namespace, project, commit)
   end
 
   def relative_self_links(relative_path, commit, project)
-    relative_path.rstrip!
+    relative_path = relative_path.rstrip
     absolute_project_path = "/" + project.full_path
 
     # Resolve `relative_path` to target path
diff --git a/spec/helpers/application_helper_spec.rb b/spec/helpers/application_helper_spec.rb
index 2f481e237a79f2fe048f34924372acb1df86a55a..e8c438e459b60d4b4b7ed374aa12730b0f4a8a4b 100644
--- a/spec/helpers/application_helper_spec.rb
+++ b/spec/helpers/application_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ApplicationHelper do
diff --git a/spec/helpers/auto_devops_helper_spec.rb b/spec/helpers/auto_devops_helper_spec.rb
index e80388f9ea7fd0423d9c46f9d6dcb624d5735598..5d42a80aae378ef3501dd3aeee3f1a9d0e58ab77 100644
--- a/spec/helpers/auto_devops_helper_spec.rb
+++ b/spec/helpers/auto_devops_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe AutoDevopsHelper do
diff --git a/spec/helpers/avatars_helper_spec.rb b/spec/helpers/avatars_helper_spec.rb
index 9330e75af11889c5826e302855640bec4abb59b8..77182a59c1c0c1aa96edabec60cd81d99c5f0819 100644
--- a/spec/helpers/avatars_helper_spec.rb
+++ b/spec/helpers/avatars_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe AvatarsHelper do
diff --git a/spec/helpers/award_emoji_helper_spec.rb b/spec/helpers/award_emoji_helper_spec.rb
index 035960ed96e103bc88c3c611a924538b59102b62..2ee27bc5427783c01c13670d610ac3d35e48f56f 100644
--- a/spec/helpers/award_emoji_helper_spec.rb
+++ b/spec/helpers/award_emoji_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe AwardEmojiHelper do
diff --git a/spec/helpers/blame_helper_spec.rb b/spec/helpers/blame_helper_spec.rb
index 722d21c566fb84ba8c56bebb67ee9d90811f91b6..8b5de0405087852eb718040addbce5239fb4559e 100644
--- a/spec/helpers/blame_helper_spec.rb
+++ b/spec/helpers/blame_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe BlameHelper do
diff --git a/spec/helpers/blob_helper_spec.rb b/spec/helpers/blob_helper_spec.rb
index 1f2364293474df499002026182fe3df06fc85797..e5e16e69833239bb15d003ef46b0128781632c18 100644
--- a/spec/helpers/blob_helper_spec.rb
+++ b/spec/helpers/blob_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe BlobHelper do
diff --git a/spec/helpers/boards_helper_spec.rb b/spec/helpers/boards_helper_spec.rb
index ad088398ce94ea7a1d545bf3f991bb63a8615b59..8a4446b7f595eca2022febc16477516624ea208d 100644
--- a/spec/helpers/boards_helper_spec.rb
+++ b/spec/helpers/boards_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe BoardsHelper do
diff --git a/spec/helpers/broadcast_messages_helper_spec.rb b/spec/helpers/broadcast_messages_helper_spec.rb
index 9bec0f9f432f5bd3ec67690b0e6d69f00881f3cf..d0f0e6f1dd5eb88bc95ebc28a0a5914467d448b3 100644
--- a/spec/helpers/broadcast_messages_helper_spec.rb
+++ b/spec/helpers/broadcast_messages_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe BroadcastMessagesHelper do
diff --git a/spec/helpers/button_helper_spec.rb b/spec/helpers/button_helper_spec.rb
index eebae1d7290a4205f8a8f01f9779b605b344a49a..303b84b23e6ac97db0a04fb89b1e9bc7ca55244c 100644
--- a/spec/helpers/button_helper_spec.rb
+++ b/spec/helpers/button_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ButtonHelper do
diff --git a/spec/helpers/calendar_helper_spec.rb b/spec/helpers/calendar_helper_spec.rb
index 828a9d9fea09842eaef97b68b058921107a00243..8dba6815e8d3dddb7ecaf121ced41148999c9400 100644
--- a/spec/helpers/calendar_helper_spec.rb
+++ b/spec/helpers/calendar_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CalendarHelper do
diff --git a/spec/helpers/ci_status_helper_spec.rb b/spec/helpers/ci_status_helper_spec.rb
index 4f665dc0514adec46a56f4598b997f1cebd213c6..80be119b069c5be81635c4cbc57e88d5d3c2667f 100644
--- a/spec/helpers/ci_status_helper_spec.rb
+++ b/spec/helpers/ci_status_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CiStatusHelper do
diff --git a/spec/helpers/commits_helper_spec.rb b/spec/helpers/commits_helper_spec.rb
index 9e53bc05a487e67e38b57774a1a81e610b81f15e..cbc5566979b4e6d1ef48b97d78e7eaafc5fff403 100644
--- a/spec/helpers/commits_helper_spec.rb
+++ b/spec/helpers/commits_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe CommitsHelper do
diff --git a/spec/helpers/components_helper_spec.rb b/spec/helpers/components_helper_spec.rb
index 94a59193be846dee42d3647fc65cc0fd50443e22..703bee0ca920ec59dbe4eda93cbc9ffb17194b00 100644
--- a/spec/helpers/components_helper_spec.rb
+++ b/spec/helpers/components_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ComponentsHelper do
diff --git a/spec/helpers/dashboard_helper_spec.rb b/spec/helpers/dashboard_helper_spec.rb
index 059ae128d93f330680b5db6ecfd2a39ee3b81a92..c899c2d98531a526d39aa8d397ab3631b08a53d6 100644
--- a/spec/helpers/dashboard_helper_spec.rb
+++ b/spec/helpers/dashboard_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe DashboardHelper do
diff --git a/spec/helpers/defer_script_tag_helper_spec.rb b/spec/helpers/defer_script_tag_helper_spec.rb
index 9ada3ae75bafcbcc6e5b49578c4ff11a5e307e13..440904188cade7584d4839932b3e05ebf9d79c37 100644
--- a/spec/helpers/defer_script_tag_helper_spec.rb
+++ b/spec/helpers/defer_script_tag_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe DeferScriptTagHelper do
diff --git a/spec/helpers/emails_helper_spec.rb b/spec/helpers/emails_helper_spec.rb
index a14ae2cde4b53a135c814351614aaab87649b62b..931b7008173d3fd9abd8222e31669614a58d1a20 100644
--- a/spec/helpers/emails_helper_spec.rb
+++ b/spec/helpers/emails_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe EmailsHelper do
diff --git a/spec/helpers/events_helper_spec.rb b/spec/helpers/events_helper_spec.rb
index e062c841717bce917e754115bfa5513f925f8e5c..7853617c3ed6f8b39d144e7594e055f151a5c28d 100644
--- a/spec/helpers/events_helper_spec.rb
+++ b/spec/helpers/events_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe EventsHelper do
diff --git a/spec/helpers/explore_helper_spec.rb b/spec/helpers/explore_helper_spec.rb
index 12651d80e36db8fc0245d6b588ee659721092f44..5208d3bd65672e735f31553fcb3cd27e938f074e 100644
--- a/spec/helpers/explore_helper_spec.rb
+++ b/spec/helpers/explore_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ExploreHelper do
diff --git a/spec/helpers/form_helper_spec.rb b/spec/helpers/form_helper_spec.rb
index a70d8333f308e288c3f067e3afbfdf677fba8ac0..68aa0137cd533c2d6709cd9c4fb0d0a65e89b38c 100644
--- a/spec/helpers/form_helper_spec.rb
+++ b/spec/helpers/form_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe FormHelper do
diff --git a/spec/helpers/git_helper_spec.rb b/spec/helpers/git_helper_spec.rb
index 9b1ef1e05a2daaae5e6520238cdcf03b5d148569..505d6ed15ac7fbabb9228593521dd6cad9d767cd 100644
--- a/spec/helpers/git_helper_spec.rb
+++ b/spec/helpers/git_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GitHelper do
diff --git a/spec/helpers/gitlab_routing_helper_spec.rb b/spec/helpers/gitlab_routing_helper_spec.rb
index 027480143bd917b096e9b6a0d27652734ea9cd30..bf043f3f0137189ed47b29292fe76c8684fead30 100644
--- a/spec/helpers/gitlab_routing_helper_spec.rb
+++ b/spec/helpers/gitlab_routing_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GitlabRoutingHelper do
diff --git a/spec/helpers/graph_helper_spec.rb b/spec/helpers/graph_helper_spec.rb
index 1f8a38dc697eac2f7c54acce9455ec1c0f63aceb..dc389c09e60ebda8e64976420fae1baa817fa409 100644
--- a/spec/helpers/graph_helper_spec.rb
+++ b/spec/helpers/graph_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe GraphHelper do
diff --git a/spec/helpers/hooks_helper_spec.rb b/spec/helpers/hooks_helper_spec.rb
index 2e21f1134b10b0e14ad5d676e21eb2043524cc11..4352089c1c0c7fe50d065cd017b9d1626594aeed 100644
--- a/spec/helpers/hooks_helper_spec.rb
+++ b/spec/helpers/hooks_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe HooksHelper do
diff --git a/spec/helpers/icons_helper_spec.rb b/spec/helpers/icons_helper_spec.rb
index 950f951e22e9699c00e92376ad4b315bd4bedd48..f1b1d411e05c5d92eabe7f9321bf475122580a0d 100644
--- a/spec/helpers/icons_helper_spec.rb
+++ b/spec/helpers/icons_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe IconsHelper do
diff --git a/spec/helpers/import_helper_spec.rb b/spec/helpers/import_helper_spec.rb
index 8a1b1e859b1fc72a191bac37420dc212f8dc0b52..a6b283e49dc0fc99ca4a236347113611df9e9edc 100644
--- a/spec/helpers/import_helper_spec.rb
+++ b/spec/helpers/import_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ImportHelper do
diff --git a/spec/helpers/instance_configuration_helper_spec.rb b/spec/helpers/instance_configuration_helper_spec.rb
index 5d716b9191d202417dcb70dc12ebbd08687a8860..31a6c7bc839a81c9133185ac4926bd84b6184635 100644
--- a/spec/helpers/instance_configuration_helper_spec.rb
+++ b/spec/helpers/instance_configuration_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe InstanceConfigurationHelper do
diff --git a/spec/helpers/issues_helper_spec.rb b/spec/helpers/issues_helper_spec.rb
index d15b5a4ab58efbc747d3a36718c1a1477c776338..a394812f8f0c02e603c25508cbc82d81f7691a07 100644
--- a/spec/helpers/issues_helper_spec.rb
+++ b/spec/helpers/issues_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe IssuesHelper do
diff --git a/spec/helpers/labels_helper_spec.rb b/spec/helpers/labels_helper_spec.rb
index 1d57aaa0da5a21350d95a1d9bad982ae403934f6..a715390ecae750cbeb43df071aa418d3e319e873 100644
--- a/spec/helpers/labels_helper_spec.rb
+++ b/spec/helpers/labels_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe LabelsHelper do
diff --git a/spec/helpers/markup_helper_spec.rb b/spec/helpers/markup_helper_spec.rb
index f6e1720e1133b6d0e1b7bb50e8970131ac8da9f4..364f215420abbf081751c83659ae3a7507717d2c 100644
--- a/spec/helpers/markup_helper_spec.rb
+++ b/spec/helpers/markup_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MarkupHelper do
@@ -408,12 +410,12 @@
 
       it 'preserves a link href when link text is truncated' do
         text = 'The quick brown fox jumped over the lazy dog' # 44 chars
-        input = "#{text}#{text}#{text} " # 133 chars
         link_url = 'http://example.com/foo/bar/baz' # 30 chars
-        input << link_url
-        object = create_object(input)
+        input = "#{text}#{text}#{text} #{link_url}" # 163 chars
         expected_link_text = 'http://example...</a>'
 
+        object = create_object(input)
+
         expect(first_line_in_markdown(object, attribute, 150, project: project)).to match(link_url)
         expect(first_line_in_markdown(object, attribute, 150, project: project)).to match(expected_link_text)
       end
diff --git a/spec/helpers/members_helper_spec.rb b/spec/helpers/members_helper_spec.rb
index 908e8960f37b2c34376951a0bec7cb8dc1286bd3..e52d2166a69806a86d7cfaac10b18b9e7f2c26b4 100644
--- a/spec/helpers/members_helper_spec.rb
+++ b/spec/helpers/members_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MembersHelper do
diff --git a/spec/helpers/milestones_helper_spec.rb b/spec/helpers/milestones_helper_spec.rb
index f5185cb2857e73554cd8a9d19fa1201d7e219737..3574066e03e3a30f380c44191a3e82d75c44989c 100644
--- a/spec/helpers/milestones_helper_spec.rb
+++ b/spec/helpers/milestones_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MilestonesHelper do
diff --git a/spec/helpers/milestones_routing_helper_spec.rb b/spec/helpers/milestones_routing_helper_spec.rb
index dc13a43c2ab6626b4ccfb088967cad830db4c3e2..4da589a50077221dc4b8c0fa887dd966a0789df4 100644
--- a/spec/helpers/milestones_routing_helper_spec.rb
+++ b/spec/helpers/milestones_routing_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe MilestonesRoutingHelper do
diff --git a/spec/helpers/namespaces_helper_spec.rb b/spec/helpers/namespaces_helper_spec.rb
index e38513f6d94108704acaed08cef55d5f961c4b43..36465069311603870fcd6a9a38b23cb2c2a6fcf2 100644
--- a/spec/helpers/namespaces_helper_spec.rb
+++ b/spec/helpers/namespaces_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe NamespacesHelper do
diff --git a/spec/helpers/nav_helper_spec.rb b/spec/helpers/nav_helper_spec.rb
index ff2be795d8727739b9b1df501a70f74c8943bffb..882a125a0da3340b9e8b76bc9f54ffe9e7956e0b 100644
--- a/spec/helpers/nav_helper_spec.rb
+++ b/spec/helpers/nav_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe NavHelper, :do_not_mock_admin_mode do
diff --git a/spec/helpers/notes_helper_spec.rb b/spec/helpers/notes_helper_spec.rb
index 0715f34dafe5032fcc36de124cf88c52c3b05a27..2da7717ebfc7fdddb3037c2bc128b85f42b7740e 100644
--- a/spec/helpers/notes_helper_spec.rb
+++ b/spec/helpers/notes_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe NotesHelper do
diff --git a/spec/helpers/notifications_helper_spec.rb b/spec/helpers/notifications_helper_spec.rb
index 5717b15d6563a0c5a9e9bd01c8b6cc582af47f5d..2384c87b377eba1971d22b5de749e292e599fff9 100644
--- a/spec/helpers/notifications_helper_spec.rb
+++ b/spec/helpers/notifications_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe NotificationsHelper do
diff --git a/spec/helpers/page_layout_helper_spec.rb b/spec/helpers/page_layout_helper_spec.rb
index 3b08fc511a3a07c7cbe644195a5f8f43df56dd81..7e851a1af019472e7f7db48fde8a2c5ef2b9b4b3 100644
--- a/spec/helpers/page_layout_helper_spec.rb
+++ b/spec/helpers/page_layout_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe PageLayoutHelper do
diff --git a/spec/helpers/pagination_helper_spec.rb b/spec/helpers/pagination_helper_spec.rb
index e235475fb47c2ea15ee75f47eed79d1939ee95e9..9fb51249edcb9b6e4898e7149468f087cf8bb424 100644
--- a/spec/helpers/pagination_helper_spec.rb
+++ b/spec/helpers/pagination_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe PaginationHelper do
diff --git a/spec/helpers/preferences_helper_spec.rb b/spec/helpers/preferences_helper_spec.rb
index 554c08add2d58e244ee6ec6e143bdb79fc1c5062..c4ed99e56a0be9d4a2660f3508c8df3d8431e2a1 100644
--- a/spec/helpers/preferences_helper_spec.rb
+++ b/spec/helpers/preferences_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe PreferencesHelper do
diff --git a/spec/helpers/profiles_helper_spec.rb b/spec/helpers/profiles_helper_spec.rb
index da2dc229c351d3a6a2ae2058aad1ec7c1ddd03b3..fc282eee26d22df37e06c1665a8eaf29d812abf8 100644
--- a/spec/helpers/profiles_helper_spec.rb
+++ b/spec/helpers/profiles_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe ProfilesHelper do
diff --git a/spec/helpers/rss_helper_spec.rb b/spec/helpers/rss_helper_spec.rb
index a7f9bdf07e4f6c2a8e9210d2c1fe33dabeeecf6d..657f5fb42bc6d5154afdd59c6004555c667cba4c 100644
--- a/spec/helpers/rss_helper_spec.rb
+++ b/spec/helpers/rss_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe RssHelper do
diff --git a/spec/helpers/runners_helper_spec.rb b/spec/helpers/runners_helper_spec.rb
index bf00841fcb632be885077534e36ae284d2469e04..042714d002ea740615e81dd0faf8996bcf4395f8 100644
--- a/spec/helpers/runners_helper_spec.rb
+++ b/spec/helpers/runners_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe RunnersHelper do
diff --git a/spec/helpers/search_helper_spec.rb b/spec/helpers/search_helper_spec.rb
index cc058d5b9834a8828f2051d5f2993a6130eac811..bc2a0bb7f386fe688433341f656333e2ab8ad28f 100644
--- a/spec/helpers/search_helper_spec.rb
+++ b/spec/helpers/search_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SearchHelper do
diff --git a/spec/helpers/sidekiq_helper_spec.rb b/spec/helpers/sidekiq_helper_spec.rb
index 117abc9c556dbcec7deb0250ab1b2e307d5e7f1b..86e52419f9cc4a442075310ac7e522b77da67b7e 100644
--- a/spec/helpers/sidekiq_helper_spec.rb
+++ b/spec/helpers/sidekiq_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SidekiqHelper do
diff --git a/spec/helpers/snippets_helper_spec.rb b/spec/helpers/snippets_helper_spec.rb
index ce5e037f88d6bf4176acdf6f81ccdf1c1ec6305f..66c8d576a4c9c6f1b8c8bbc18688191d593c38e3 100644
--- a/spec/helpers/snippets_helper_spec.rb
+++ b/spec/helpers/snippets_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SnippetsHelper do
diff --git a/spec/helpers/storage_helper_spec.rb b/spec/helpers/storage_helper_spec.rb
index 4bd0fbb76ca1c597b1e67080581415d626977985..577e6e5caf0e600f08755ae5cd06c5e1f186851c 100644
--- a/spec/helpers/storage_helper_spec.rb
+++ b/spec/helpers/storage_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe StorageHelper do
diff --git a/spec/helpers/submodule_helper_spec.rb b/spec/helpers/submodule_helper_spec.rb
index 465c76e5e6bebfd886a721300d72adc65e95bfa4..fcfce0eaf3103e2d562c1e527f4e9dbbbb68be42 100644
--- a/spec/helpers/submodule_helper_spec.rb
+++ b/spec/helpers/submodule_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe SubmoduleHelper do
diff --git a/spec/helpers/tab_helper_spec.rb b/spec/helpers/tab_helper_spec.rb
index 9abf63d4bd407b2f5d9296100815b78441cdd3d5..3a3935a2130f8e7c24f584fc05c3695bdb85b895 100644
--- a/spec/helpers/tab_helper_spec.rb
+++ b/spec/helpers/tab_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe TabHelper do
diff --git a/spec/helpers/time_helper_spec.rb b/spec/helpers/time_helper_spec.rb
index 8bf378549fed006af7451012923e35c1621d34c9..858d6d341f4bed37c03e0ff551f8cff1fdf48e9b 100644
--- a/spec/helpers/time_helper_spec.rb
+++ b/spec/helpers/time_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe TimeHelper do
diff --git a/spec/helpers/todos_helper_spec.rb b/spec/helpers/todos_helper_spec.rb
index 63806ef91f30eb7f9827479cec7a53ef87da8657..7c73b990338c5ef034eda267c85c742352acf5c0 100644
--- a/spec/helpers/todos_helper_spec.rb
+++ b/spec/helpers/todos_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe TodosHelper do
diff --git a/spec/helpers/tree_helper_spec.rb b/spec/helpers/tree_helper_spec.rb
index 4a62e696cd9a3008d49f2c4bd0ba3acc70873b01..c7cdb4ae45c9b68477a0caeef0dbbf5688fd7e87 100644
--- a/spec/helpers/tree_helper_spec.rb
+++ b/spec/helpers/tree_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe TreeHelper do
diff --git a/spec/helpers/user_callouts_helper_spec.rb b/spec/helpers/user_callouts_helper_spec.rb
index 8fa479a4474fffde0b8fce45c0d2b1f9db570c1f..547bf693e9431ded1963976689a7790ac3b6ff00 100644
--- a/spec/helpers/user_callouts_helper_spec.rb
+++ b/spec/helpers/user_callouts_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "spec_helper"
 
 describe UserCalloutsHelper do
diff --git a/spec/helpers/users_helper_spec.rb b/spec/helpers/users_helper_spec.rb
index 9165e91ddcd64402a98160a9e40dc383b0163fc6..59abe8c09e127e757c754aa4d333e1c7190cb64e 100644
--- a/spec/helpers/users_helper_spec.rb
+++ b/spec/helpers/users_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe UsersHelper do
diff --git a/spec/helpers/version_check_helper_spec.rb b/spec/helpers/version_check_helper_spec.rb
index edc0d64d031539bc50452950500e412dbe5d0b9f..421ff21bfdb1118bc0314f6511c5f08aa3643924 100644
--- a/spec/helpers/version_check_helper_spec.rb
+++ b/spec/helpers/version_check_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe VersionCheckHelper do
diff --git a/spec/helpers/visibility_level_helper_spec.rb b/spec/helpers/visibility_level_helper_spec.rb
index 2d2766962081aa6e526ffce22e2dff430b5ceae0..1a176cfe965d279014ec944320e77253b40ce3e2 100644
--- a/spec/helpers/visibility_level_helper_spec.rb
+++ b/spec/helpers/visibility_level_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe VisibilityLevelHelper do
diff --git a/spec/helpers/wiki_helper_spec.rb b/spec/helpers/wiki_helper_spec.rb
index ee977e37ec10457f7e337c8d2a1a1a7730985cfe..bcc2bd71da1243605a140177eef922cbcead43bf 100644
--- a/spec/helpers/wiki_helper_spec.rb
+++ b/spec/helpers/wiki_helper_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 describe WikiHelper do