diff --git a/spec/controllers/api/v1/circles/statuses_controller_spec.rb b/spec/controllers/api/v1/circles/statuses_controller_spec.rb
index 2a323aa0f8..5921f468bf 100644
--- a/spec/controllers/api/v1/circles/statuses_controller_spec.rb
+++ b/spec/controllers/api/v1/circles/statuses_controller_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe Api::V1::Circles::StatusesController do
+RSpec.describe Api::V1::Circles::StatusesController do
   render_views
 
   let(:user)  { Fabricate(:user) }
diff --git a/spec/controllers/api/v1/lists_controller_spec.rb b/spec/controllers/api/v1/lists_controller_spec.rb
index ed4edbf760..62cf53a09f 100644
--- a/spec/controllers/api/v1/lists_controller_spec.rb
+++ b/spec/controllers/api/v1/lists_controller_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe Api::V1::ListsController do
+RSpec.describe Api::V1::ListsController do
   render_views
 
   let(:user) { Fabricate(:user) }
diff --git a/spec/models/admin/ng_rule_spec.rb b/spec/models/admin/ng_rule_spec.rb
index 8e04bc1696..fb85e6e9bb 100644
--- a/spec/models/admin/ng_rule_spec.rb
+++ b/spec/models/admin/ng_rule_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe Admin::NgRule do
+RSpec.describe Admin::NgRule do
   shared_examples 'matches rule' do |reason|
     it 'matches and history is added' do
       expect(subject).to be false
diff --git a/spec/models/friend_domain_spec.rb b/spec/models/friend_domain_spec.rb
index 98dcb9cd90..336f921ebd 100644
--- a/spec/models/friend_domain_spec.rb
+++ b/spec/models/friend_domain_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe FriendDomain do
+RSpec.describe FriendDomain do
   let(:friend) { Fabricate(:friend_domain, domain: 'foo.bar', inbox_url: 'https://foo.bar/inbox') }
 
   before do
diff --git a/spec/requests/api/v1/timelines/antenna_spec.rb b/spec/requests/api/v1/timelines/antenna_spec.rb
index 7b35cf2fa9..263fd450ec 100644
--- a/spec/requests/api/v1/timelines/antenna_spec.rb
+++ b/spec/requests/api/v1/timelines/antenna_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe 'API V1 Timelines Antenna' do
+RSpec.describe 'API V1 Timelines Antenna' do
   let(:user) { Fabricate(:user) }
   let(:scopes)  { 'read:statuses' }
   let(:token)   { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
diff --git a/spec/requests/user_custom_css_spec.rb b/spec/requests/user_custom_css_spec.rb
index a36afc0e6e..5ef01a7392 100644
--- a/spec/requests/user_custom_css_spec.rb
+++ b/spec/requests/user_custom_css_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe 'User custom CSS' do
+RSpec.describe 'User custom CSS' do
   let(:user)       { Fabricate(:user) }
   let(:custom_css) { '* { display: none !important; }' }
 
diff --git a/spec/search/services/statuses_search_service_spec.rb b/spec/search/services/statuses_search_service_spec.rb
index abbe28f715..d1951658d5 100644
--- a/spec/search/services/statuses_search_service_spec.rb
+++ b/spec/search/services/statuses_search_service_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe StatusesSearchService do
+RSpec.describe StatusesSearchService do
   describe 'a local user posts with searchability' do
     subject do
       described_class.new.call('ohagi', account, limit: 10, searchability: searchability).map(&:id)
diff --git a/spec/serializers/activitypub/note_for_misskey_serializer_spec.rb b/spec/serializers/activitypub/note_for_misskey_serializer_spec.rb
index 5666f4ed49..6bcdd7978e 100644
--- a/spec/serializers/activitypub/note_for_misskey_serializer_spec.rb
+++ b/spec/serializers/activitypub/note_for_misskey_serializer_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe ActivityPub::NoteForMisskeySerializer do
+RSpec.describe ActivityPub::NoteForMisskeySerializer do
   subject { JSON.parse(serialization.to_json) }
 
   let(:serialization) { ActiveModelSerializers::SerializableResource.new(parent, serializer: described_class, adapter: ActivityPub::Adapter) }
diff --git a/spec/serializers/node_info/serializer_spec.rb b/spec/serializers/node_info/serializer_spec.rb
index 2c7074368c..da7a6bcebb 100644
--- a/spec/serializers/node_info/serializer_spec.rb
+++ b/spec/serializers/node_info/serializer_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe NodeInfo::Serializer do
+RSpec.describe NodeInfo::Serializer do
   let(:serialization) do
     JSON.parse(
       ActiveModelSerializers::SerializableResource.new(
diff --git a/spec/serializers/rest/custom_emoji_serializer_spec.rb b/spec/serializers/rest/custom_emoji_serializer_spec.rb
index d1806fd0c0..10f84278af 100644
--- a/spec/serializers/rest/custom_emoji_serializer_spec.rb
+++ b/spec/serializers/rest/custom_emoji_serializer_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe REST::CustomEmojiSerializer do
+RSpec.describe REST::CustomEmojiSerializer do
   let(:serialization) { serialized_record_json(record, described_class) }
   let(:record) do
     Fabricate(:custom_emoji, shortcode: 'ohagi', aliases: aliases)
diff --git a/spec/workers/activitypub/fetch_instance_info_worker_spec.rb b/spec/workers/activitypub/fetch_instance_info_worker_spec.rb
index 9dc9594041..4ce1fdf519 100644
--- a/spec/workers/activitypub/fetch_instance_info_worker_spec.rb
+++ b/spec/workers/activitypub/fetch_instance_info_worker_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe ActivityPub::FetchInstanceInfoWorker do
+RSpec.describe ActivityPub::FetchInstanceInfoWorker do
   subject { described_class.new }
 
   let(:wellknown_nodeinfo) do
diff --git a/spec/workers/activitypub/fetch_remote_status_worker_spec.rb b/spec/workers/activitypub/fetch_remote_status_worker_spec.rb
index 6336c21558..a5ab71a2c3 100644
--- a/spec/workers/activitypub/fetch_remote_status_worker_spec.rb
+++ b/spec/workers/activitypub/fetch_remote_status_worker_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe ActivityPub::FetchRemoteStatusWorker do
+RSpec.describe ActivityPub::FetchRemoteStatusWorker do
   subject { described_class.new }
 
   let(:sender) { Fabricate(:account, domain: 'example.com', uri: 'https://example.com/actor') }
diff --git a/spec/workers/process_references_worker_spec.rb b/spec/workers/process_references_worker_spec.rb
index 10a2bc68f9..3184f50977 100644
--- a/spec/workers/process_references_worker_spec.rb
+++ b/spec/workers/process_references_worker_spec.rb
@@ -2,7 +2,7 @@
 
 require 'rails_helper'
 
-describe ProcessReferencesWorker do
+RSpec.describe ProcessReferencesWorker do
   let(:worker) { described_class.new }
 
   describe 'perform' do