diff --git a/Gemfile b/Gemfile
index 5cdc2aa0e5..9489fe1e81 100644
--- a/Gemfile
+++ b/Gemfile
@@ -27,7 +27,7 @@ gem 'addressable', '~> 2.8'
 gem 'bootsnap', require: false
 gem 'browser'
 gem 'charlock_holmes', '~> 0.7.7'
-gem 'chewy', '~> 7.3'
+gem 'chewy'
 gem 'devise'
 gem 'devise-two-factor'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index e316211a25..dc1c09c46f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -159,9 +159,9 @@ GEM
     cbor (0.5.10.1)
     cgi (0.5.1)
     charlock_holmes (0.7.9)
-    chewy (7.6.0)
-      activesupport (>= 5.2)
-      elasticsearch (>= 7.14.0, < 8)
+    chewy (8.0.1)
+      activesupport (>= 7.2)
+      elasticsearch (>= 8.14, < 9.0)
       elasticsearch-dsl
     childprocess (5.1.0)
       logger (~> 1.5)
@@ -214,16 +214,16 @@ GEM
     dotenv (3.2.0)
     drb (2.2.3)
     dry-cli (1.4.1)
-    elasticsearch (7.17.11)
-      elasticsearch-api (= 7.17.11)
-      elasticsearch-transport (= 7.17.11)
-    elasticsearch-api (7.17.11)
+    elastic-transport (8.4.1)
+      faraday (< 3)
+      multi_json
+    elasticsearch (8.19.3)
+      elastic-transport (~> 8.3)
+      elasticsearch-api (= 8.19.3)
+      ostruct
+    elasticsearch-api (8.19.3)
       multi_json
     elasticsearch-dsl (0.1.10)
-    elasticsearch-transport (7.17.11)
-      base64
-      faraday (>= 1, < 3)
-      multi_json
     email_validator (2.2.4)
       activemodel
     erb (6.0.2)
@@ -959,7 +959,7 @@ DEPENDENCIES
   capybara (~> 3.39)
   capybara-playwright-driver
   charlock_holmes (~> 0.7.7)
-  chewy (~> 7.3)
+  chewy
   climate_control
   cocoon (~> 1.2)
   color_diff (~> 0.1)
diff --git a/README.md b/README.md
index 9cb0d3e61f..82c67b05e8 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,7 @@ Mastodon is a **free, open-source social network server** based on [ActivityPub]
 - **PostgreSQL** 14+
 - **Redis** 7.0+
 - **Node.js** 20+
+- **FFmpeg** 5.1+
 
 This repository includes deployment configurations for **Docker and docker-compose**, as well as for other environments like Heroku and Scalingo. For Helm charts, reference the [mastodon/chart repository](https://github.com/mastodon/chart). A [**standalone** installation guide](https://docs.joinmastodon.org/admin/install/) is available in the main documentation.
 
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 765bf4dcf6..d3b2789314 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -1366,6 +1366,9 @@ body > [data-popper-placement] {
   .autosuggest-textarea > .autosuggest-textarea__textarea:lang(#{$lang}) {
     writing-mode: vertical-lr;
     min-height: 209px; // writable
+    max-height: 209px; // suppress autosizing by react-textarea-autosize
+    overflow-x: auto;
+    scrollbar-color: unset;
   }
 
   .detailed-status > .status__content > .status__content__text:lang(#{$lang}) {
diff --git a/app/javascript/styles/mastodon/forms.scss b/app/javascript/styles/mastodon/forms.scss
index c25bdfc820..98cbbf7659 100644
--- a/app/javascript/styles/mastodon/forms.scss
+++ b/app/javascript/styles/mastodon/forms.scss
@@ -1257,31 +1257,44 @@ code {
 }
 
 .progress-tracker {
+  --circle-size: 30px;
+
   display: flex;
   align-items: center;
   padding-bottom: 30px;
   margin-bottom: 30px;
 
   li {
-    flex: 0 0 auto;
     position: relative;
-  }
 
-  .separator {
-    height: 2px;
-    background: var(--color-border-primary);
-    flex: 1 1 auto;
+    --connector-color: var(--color-border-primary);
+    --connector-thickness: 2px;
 
     &.completed {
-      background: var(--color-text-brand);
+      --connector-color: var(--color-bg-brand-base);
+    }
+
+    &:not(:last-child) {
+      flex-grow: 1;
+
+      // Connector line between circles
+      &::after {
+        content: '';
+        display: block;
+        position: absolute;
+        inset-inline: var(--circle-size) 0;
+        background-color: var(--connector-color);
+        height: 2px;
+        top: calc((var(--circle-size) - var(--connector-thickness)) / 2);
+      }
     }
   }
 
   .circle {
     box-sizing: border-box;
     position: relative;
-    width: 30px;
-    height: 30px;
+    width: var(--circle-size);
+    height: var(--circle-size);
     border-radius: 50%;
     border: 2px solid var(--color-border-primary);
     flex: 0 0 auto;
@@ -1302,8 +1315,9 @@ code {
     padding-top: 10px;
     text-align: center;
     width: 100px;
-    left: 50%;
-    transform: translateX(-50%);
+
+    // Center-align the label with the circle
+    transform: translateX(-33.3333%);
   }
 
   li:first-child .label {
@@ -1320,15 +1334,15 @@ code {
     transform: none;
   }
 
-  .active .circle {
-    border-color: var(--color-text-brand);
+  [aria-current='step'] .circle {
+    border-color: var(--color-bg-brand-base);
 
     &::before {
       content: '';
       width: 10px;
       height: 10px;
       border-radius: 50%;
-      background: var(--color-text-brand);
+      background: var(--color-bg-brand-base);
       position: absolute;
       left: 50%;
       top: 50%;
@@ -1337,8 +1351,9 @@ code {
   }
 
   .completed .circle {
-    border-color: var(--color-text-brand);
-    background: var(--color-text-brand);
+    color: var(--color-text-on-brand-base);
+    background: var(--color-bg-brand-base);
+    border-color: var(--color-bg-brand-base);
   }
 }
 
diff --git a/app/lib/activitypub/activity.rb b/app/lib/activitypub/activity.rb
index 2931600831..57fd41dcb3 100644
--- a/app/lib/activitypub/activity.rb
+++ b/app/lib/activitypub/activity.rb
@@ -167,6 +167,12 @@ class ActivityPub::Activity
     @follow_from_object ||= ::Follow.find_by(target_account: @account, uri: object_uri) unless object_uri.nil?
   end
 
+  def feature_request_from_object
+    return @collection_item if instance_variable_defined?(:@collection_item)
+
+    @collection_item = CollectionItem.local.find_by(activity_uri: value_or_id(@object), account_id: @account.id)
+  end
+
   def fetch_remote_original_status
     if object_uri.start_with?('http')
       return if ActivityPub::TagManager.instance.local_uri?(object_uri)
diff --git a/app/lib/activitypub/activity/accept.rb b/app/lib/activitypub/activity/accept.rb
index 92a8190c03..dd4c8341ff 100644
--- a/app/lib/activitypub/activity/accept.rb
+++ b/app/lib/activitypub/activity/accept.rb
@@ -5,6 +5,7 @@ class ActivityPub::Activity::Accept < ActivityPub::Activity
     return accept_follow_for_relay if relay_follow?
     return accept_follow!(follow_request_from_object) unless follow_request_from_object.nil?
     return accept_quote!(quote_request_from_object) unless quote_request_from_object.nil?
+    return accept_feature_request! if Mastodon::Feature.collections_federation_enabled? && feature_request_from_object.present?
 
     case @object['type']
     when 'Follow'
@@ -44,6 +45,17 @@ class ActivityPub::Activity::Accept < ActivityPub::Activity
     accept_quote!(quote)
   end
 
+  def accept_feature_request!
+    approval_uri = value_or_id(first_of_value(@json['result']))
+    return if approval_uri.nil? || unsupported_uri_scheme?(approval_uri) || non_matching_uri_hosts?(approval_uri, @account.uri)
+
+    collection_item = feature_request_from_object
+    collection_item.update!(approval_uri:, state: :accepted)
+
+    activity_json = ActiveModelSerializers::SerializableResource.new(collection_item, serializer: ActivityPub::AddFeaturedItemSerializer, adapter: ActivityPub::Adapter).to_json
+    ActivityPub::AccountRawDistributionWorker.perform_async(activity_json, collection_item.collection.account_id)
+  end
+
   def accept_quote!(quote)
     approval_uri = value_or_id(first_of_value(@json['result']))
     return if unsupported_uri_scheme?(approval_uri) || quote.quoted_account != @account || !quote.status.local? || !quote.pending?
diff --git a/app/lib/activitypub/activity/reject.rb b/app/lib/activitypub/activity/reject.rb
index 3dafaba188..b6195cd199 100644
--- a/app/lib/activitypub/activity/reject.rb
+++ b/app/lib/activitypub/activity/reject.rb
@@ -6,6 +6,7 @@ class ActivityPub::Activity::Reject < ActivityPub::Activity
     return follow_request_from_object.reject! unless follow_request_from_object.nil?
     return UnfollowService.new.call(follow_from_object.account, @account) unless follow_from_object.nil?
     return reject_quote!(quote_request_from_object) unless quote_request_from_object.nil?
+    return reject_feature_request! unless feature_request_from_object.nil?
 
     case @object['type']
     when 'Follow'
@@ -46,6 +47,13 @@ class ActivityPub::Activity::Reject < ActivityPub::Activity
     quote.reject!
   end
 
+  def reject_feature_request!
+    collection_item = feature_request_from_object
+    return unless collection_item.account == @account && collection_item.local?
+
+    collection_item.destroy!
+  end
+
   def relay
     @relay ||= Relay.find_by(follow_activity_id: object_uri) unless object_uri.nil?
   end
diff --git a/app/lib/admin/metrics/dimension/software_versions_dimension.rb b/app/lib/admin/metrics/dimension/software_versions_dimension.rb
index 3e81579584..70d8f07b51 100644
--- a/app/lib/admin/metrics/dimension/software_versions_dimension.rb
+++ b/app/lib/admin/metrics/dimension/software_versions_dimension.rb
@@ -65,7 +65,7 @@ class Admin::Metrics::Dimension::SoftwareVersionsDimension < Admin::Metrics::Dim
       value: version,
       human_value: version,
     }
-  rescue Faraday::ConnectionFailed, Elasticsearch::Transport::Transport::Error
+  rescue Faraday::ConnectionFailed, Elastic::Transport::Transport::Error
     nil
   end
 
diff --git a/app/lib/admin/metrics/dimension/space_usage_dimension.rb b/app/lib/admin/metrics/dimension/space_usage_dimension.rb
index 1b4d224c77..ea48de52ab 100644
--- a/app/lib/admin/metrics/dimension/space_usage_dimension.rb
+++ b/app/lib/admin/metrics/dimension/space_usage_dimension.rb
@@ -69,7 +69,7 @@ class Admin::Metrics::Dimension::SpaceUsageDimension < Admin::Metrics::Dimension
       unit: 'bytes',
       human_value: number_to_human_size(value),
     }
-  rescue Faraday::ConnectionFailed, Elasticsearch::Transport::Transport::Error
+  rescue Faraday::ConnectionFailed, Elastic::Transport::Transport::Error
     nil
   end
 end
diff --git a/app/lib/admin/system_check/elasticsearch_check.rb b/app/lib/admin/system_check/elasticsearch_check.rb
index 11a1abd777..1d404950e3 100644
--- a/app/lib/admin/system_check/elasticsearch_check.rb
+++ b/app/lib/admin/system_check/elasticsearch_check.rb
@@ -17,7 +17,7 @@ class Admin::SystemCheck::ElasticsearchCheck < Admin::SystemCheck::BaseCheck
     return true unless Chewy.enabled?
 
     running_version.present? && compatible_version? && cluster_health['status'] == 'green' && indexes_match? && specifications_match? && preset_matches?
-  rescue Faraday::ConnectionFailed, Elasticsearch::Transport::Transport::Error, HTTPClient::KeepAliveDisconnected
+  rescue Faraday::ConnectionFailed, Elastic::Transport::Transport::Error, HTTPClient::KeepAliveDisconnected
     false
   end
 
@@ -54,7 +54,7 @@ class Admin::SystemCheck::ElasticsearchCheck < Admin::SystemCheck::BaseCheck
     else
       Admin::SystemCheck::Message.new(:elasticsearch_preset, nil, 'https://docs.joinmastodon.org/admin/elasticsearch/#scaling')
     end
-  rescue Faraday::ConnectionFailed, Elasticsearch::Transport::Transport::Error, HTTPClient::KeepAliveDisconnected
+  rescue Faraday::ConnectionFailed, Elastic::Transport::Transport::Error, HTTPClient::KeepAliveDisconnected
     Admin::SystemCheck::Message.new(:elasticsearch_running_check)
   end
 
@@ -67,7 +67,7 @@ class Admin::SystemCheck::ElasticsearchCheck < Admin::SystemCheck::BaseCheck
   def running_version
     @running_version ||= begin
       Chewy.client.info['version']['number']
-    rescue Faraday::ConnectionFailed, Elasticsearch::Transport::Transport::Error
+    rescue Faraday::ConnectionFailed, Elastic::Transport::Transport::Error
       nil
     end
   end
diff --git a/app/models/collection_item.rb b/app/models/collection_item.rb
index 78186a89fc..018fd3cb17 100644
--- a/app/models/collection_item.rb
+++ b/app/models/collection_item.rb
@@ -29,7 +29,7 @@ class CollectionItem < ApplicationRecord
 
   validates :position, numericality: { only_integer: true, greater_than: 0 }
   validates :activity_uri, presence: true, if: :local_item_with_remote_account?
-  validates :approval_uri, presence: true, unless: -> { local? || account&.local? }
+  validates :approval_uri, presence: true, unless: -> { local? || account&.local? || !accepted? }
   validates :account, presence: true, if: :accepted?
   validates :object_uri, presence: true, if: -> { account.nil? }
   validates :uri, presence: true, if: :remote_item_with_remote_account?
diff --git a/app/services/activitypub/process_featured_item_service.rb b/app/services/activitypub/process_featured_item_service.rb
index 56edf14c79..b69cfc54e8 100644
--- a/app/services/activitypub/process_featured_item_service.rb
+++ b/app/services/activitypub/process_featured_item_service.rb
@@ -21,9 +21,9 @@ class ActivityPub::ProcessFeaturedItemService
       else
         @collection_item = collection.collection_items.create!(
           uri: item_json['id'],
-          object_uri: item_json['featuredObject'],
-          approval_uri: item_json['featureAuthorization']
+          object_uri: item_json['featuredObject']
         )
+        @approval_uri = item_json['featureAuthorization']
 
         verify_authorization!
       end
@@ -35,8 +35,8 @@ class ActivityPub::ProcessFeaturedItemService
   private
 
   def verify_authorization!
-    ActivityPub::VerifyFeaturedItemService.new.call(@collection_item)
+    ActivityPub::VerifyFeaturedItemService.new.call(@collection_item, @approval_uri)
   rescue Mastodon::RecursionLimitExceededError, Mastodon::UnexpectedResponseError, *Mastodon::HTTP_CONNECTION_ERRORS
-    ActivityPub::VerifyFeaturedItemWorker.perform_in(rand(30..600).seconds, @collection_item.id)
+    ActivityPub::VerifyFeaturedItemWorker.perform_in(rand(30..600).seconds, @collection_item.id, @approval_uri)
   end
 end
diff --git a/app/services/activitypub/verify_featured_item_service.rb b/app/services/activitypub/verify_featured_item_service.rb
index f3dcccf4a0..ecebdf2075 100644
--- a/app/services/activitypub/verify_featured_item_service.rb
+++ b/app/services/activitypub/verify_featured_item_service.rb
@@ -3,23 +3,23 @@
 class ActivityPub::VerifyFeaturedItemService
   include JsonLdHelper
 
-  def call(collection_item)
+  def call(collection_item, approval_uri)
     @collection_item = collection_item
-    @authorization = fetch_resource(@collection_item.approval_uri, true, raise_on_error: :temporary)
+    @authorization = fetch_resource(approval_uri, true, raise_on_error: :temporary)
 
     if @authorization.nil?
       @collection_item.update!(state: :rejected)
       return
     end
 
-    return if non_matching_uri_hosts?(@collection_item.approval_uri, @authorization['interactionTarget'])
+    return if non_matching_uri_hosts?(approval_uri, @authorization['interactionTarget'])
     return unless matching_type? && matching_collection_uri?
 
     account = Account.where(uri: @collection_item.object_uri).first
     account ||= ActivityPub::FetchRemoteAccountService.new.call(@collection_item.object_uri)
     return if account.blank?
 
-    @collection_item.update!(account:, state: :accepted)
+    @collection_item.update!(account:, approval_uri:, state: :accepted)
   end
 
   private
diff --git a/app/services/fetch_oembed_service.rb b/app/services/fetch_oembed_service.rb
index c7d4f7e292..cc71a5f92b 100644
--- a/app/services/fetch_oembed_service.rb
+++ b/app/services/fetch_oembed_service.rb
@@ -86,14 +86,14 @@ class FetchOEmbedService
     end
 
     validate(parse_for_format(body)) if body.present?
-  rescue Oj::ParseError, Ox::ParseError
+  rescue JSON::ParserError, Ox::ParseError
     nil
   end
 
   def parse_for_format(body)
     case @format
     when :json
-      Oj.load(body, mode: :strict)&.with_indifferent_access
+      JSON.parse(body)&.with_indifferent_access
     when :xml
       Ox.load(body, mode: :hash_no_attrs)&.with_indifferent_access&.dig(:oembed)
     end
diff --git a/app/views/auth/shared/_progress.html.haml b/app/views/auth/shared/_progress.html.haml
index 8fb3385419..9ee0abdf90 100644
--- a/app/views/auth/shared/_progress.html.haml
+++ b/app/views/auth/shared/_progress.html.haml
@@ -1,26 +1,35 @@
 - progress_index = { rules: 0, details: 1, confirm: 2, confirmed: 3, completed: 4 }[stage.to_sym]
 
-%ol.progress-tracker
-  %li{ class: progress_index.positive? ? 'completed' : 'active' }
+%ol.progress-tracker{ role: 'list', 'aria-label': t('auth.progress.list') }
+  %li{
+    class: progress_index.positive? ? 'completed' : nil,
+    'aria-current': progress_index.zero? ? 'step' : nil
+  }
     .circle
       - if progress_index.positive?
         = check_icon
     .label= t('auth.progress.rules')
-  %li.separator{ class: progress_index.positive? ? 'completed' : nil }
-  %li{ class: [progress_index > 1 && 'completed', progress_index == 1 && 'active'] }
+  %li{
+    class: progress_index > 1 && 'completed',
+    'aria-current': progress_index == 1 ? 'step' : nil
+  }
     .circle
       - if progress_index > 1
         = check_icon
     .label= t('auth.progress.details')
-  %li.separator{ class: progress_index > 1 ? 'completed' : nil }
-  %li{ class: [progress_index > 2 && 'completed', progress_index == 2 && 'active'] }
+  %li{
+    class: progress_index > 2 && 'completed',
+    'aria-current': progress_index == 2 ? 'step' : nil
+  }
     .circle
       - if progress_index > 2
         = check_icon
     .label= t('auth.progress.confirm')
   - if approved_registrations?
-    %li.separator{ class: progress_index > 2 ? 'completed' : nil }
-    %li{ class: [progress_index > 3 && 'completed', progress_index == 3 && 'active'] }
+    %li{
+      class: progress_index > 3 && 'completed',
+      'aria-current': progress_index == 3 ? 'step' : nil
+    }
       .circle
         - if progress_index > 3
           = check_icon
diff --git a/app/workers/activitypub/verify_featured_item_worker.rb b/app/workers/activitypub/verify_featured_item_worker.rb
index 6eda194717..cd47f5ee21 100644
--- a/app/workers/activitypub/verify_featured_item_worker.rb
+++ b/app/workers/activitypub/verify_featured_item_worker.rb
@@ -7,10 +7,10 @@ class ActivityPub::VerifyFeaturedItemWorker
 
   sidekiq_options queue: 'pull', retry: 5
 
-  def perform(collection_item_id)
+  def perform(collection_item_id, approval_uri)
     collection_item = CollectionItem.find(collection_item_id)
 
-    ActivityPub::VerifyFeaturedItemService.new.call(collection_item)
+    ActivityPub::VerifyFeaturedItemService.new.call(collection_item, approval_uri)
   rescue ActiveRecord::RecordNotFound
     # Do nothing
     nil
diff --git a/config/locales/en-GB.yml b/config/locales/en-GB.yml
index 815378fbdd..108c17149e 100644
--- a/config/locales/en-GB.yml
+++ b/config/locales/en-GB.yml
@@ -1279,6 +1279,7 @@ en-GB:
     progress:
       confirm: Confirm email
       details: Your details
+      list: Sign up progress
       review: Our review
       rules: Accept rules
     providers:
diff --git a/config/locales/en.yml b/config/locales/en.yml
index aeb0051a11..5db5384a47 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -1279,6 +1279,7 @@ en:
     progress:
       confirm: Confirm email
       details: Your details
+      list: Sign up progress
       review: Our review
       rules: Accept rules
     providers:
diff --git a/lib/elasticsearch/client_extensions.rb b/lib/elasticsearch/client_extensions.rb
index 700bfa4a1c..1e1b441c6e 100644
--- a/lib/elasticsearch/client_extensions.rb
+++ b/lib/elasticsearch/client_extensions.rb
@@ -2,7 +2,9 @@
 
 module Elasticsearch
   module ClientExtensions
-    def verify_elasticsearch
+    def initialize(arguments = {}, &block)
+      super
+
       @verified = true
     end
   end
diff --git a/lib/mastodon/cli/domains.rb b/lib/mastodon/cli/domains.rb
index cbd3465e04..2b719f3777 100644
--- a/lib/mastodon/cli/domains.rb
+++ b/lib/mastodon/cli/domains.rb
@@ -140,13 +140,13 @@ module Mastodon::CLI
           Request.new(:get, "https://#{domain}/api/v1/instance").perform do |res|
             next unless res.code == 200
 
-            stats[domain] = Oj.load(res.to_s)
+            stats[domain] = JSON.parse(res.to_s)
           end
 
           Request.new(:get, "https://#{domain}/api/v1/instance/peers").perform do |res|
             next unless res.code == 200
 
-            Oj.load(res.to_s).reject { |peer| stats.key?(peer) }.each do |peer|
+            JSON.parse(res.to_s).reject { |peer| stats.key?(peer) }.each do |peer|
               pool.post(peer, &work_unit)
             end
           end
@@ -154,7 +154,7 @@ module Mastodon::CLI
           Request.new(:get, "https://#{domain}/api/v1/instance/activity").perform do |res|
             next unless res.code == 200
 
-            stats[domain]['activity'] = Oj.load(res.to_s)
+            stats[domain]['activity'] = JSON.parse(res.to_s)
           end
         rescue
           failed.increment
diff --git a/lib/mastodon/cli/search.rb b/lib/mastodon/cli/search.rb
index 7a9d95fb3e..3d866b5d36 100644
--- a/lib/mastodon/cli/search.rb
+++ b/lib/mastodon/cli/search.rb
@@ -115,7 +115,7 @@ module Mastodon::CLI
       progress.finish
 
       say("Indexed #{added} records, de-indexed #{removed}", :green, true)
-    rescue Elasticsearch::Transport::Transport::ServerError => e
+    rescue Elastic::Transport::Transport::ServerError => e
       fail_with_message <<~ERROR
         There was an issue connecting to the search server. Make sure the
         server is configured and running correctly, and that the environment
diff --git a/lib/paperclip/transcoder.rb b/lib/paperclip/transcoder.rb
index 47e3f9f547..c2017b8d3a 100644
--- a/lib/paperclip/transcoder.rb
+++ b/lib/paperclip/transcoder.rb
@@ -51,10 +51,7 @@ module Paperclip
           @output_options['maxrate'] = bitrate + 192_000
           @output_options['bufsize'] = bitrate * 5
 
-          if high_vfr?(metadata)
-            # TODO: change to `fps_mode` in the future, as `vsync` is being deprecated
-            @output_options['vsync'] = 'vfr'
-          end
+          @output_options['fps_mode'] = 'vfr' if high_vfr?(metadata)
         end
       end
 
diff --git a/lib/tasks/emojis.rake b/lib/tasks/emojis.rake
index 3b99a102d1..902c308739 100644
--- a/lib/tasks/emojis.rake
+++ b/lib/tasks/emojis.rake
@@ -109,7 +109,7 @@ namespace :emojis do
     emojis_light = '👽⚾🐔☁️💨🕊️👀🍥👻🐐❕❔⛸️🌩️🔊🔇📃🌧️🐏🍚🍙🐓🐑💀☠️🌨️🔉🔈💬💭🏐🏳️⚪⬜◽◻️▫️🪽🪿'
     emojis_dark = '🎱🐜⚫🖤⬛◼️◾◼️✒️▪️💣🎳📷📸♣️🕶️✴️🔌💂‍♀️📽️🍳🦍💂🔪🕳️🕹️🕋🖊️🖋️💂‍♂️🎤🎓🎥🎼♠️🎩🦃📼📹🎮🐃🏴🐞🕺📱📲🚲🪮🐦‍⬛'
 
-    map = Oj.load(File.read(src))
+    map = JSON.parse(File.read(src))
 
     emojis_light.each_grapheme_cluster do |emoji|
       gen_border map[emoji], 'black'
@@ -193,7 +193,7 @@ namespace :emojis do
     require 'vips'
 
     src = Rails.root.join('app', 'javascript', 'mastodon', 'features', 'emoji', 'emoji_data.json')
-    sheet = Oj.load(File.read(src))
+    sheet = JSON.load_file(src)
 
     max = 0
     sheet['emojis'].each_value do |row|
diff --git a/lib/tasks/repo.rake b/lib/tasks/repo.rake
index 6c696a9097..85c7bc43f3 100644
--- a/lib/tasks/repo.rake
+++ b/lib/tasks/repo.rake
@@ -22,7 +22,7 @@ namespace :repo do
 
     while url.present?
       response     = HTTP.get(url)
-      contributors = Oj.load(response.body)
+      contributors = JSON.parse(response.body)
 
       contributors.each do |c|
         file << "* [#{c['login']}](#{c['html_url']})\n" if c['login']
@@ -68,7 +68,7 @@ namespace :repo do
                   end
                 end
 
-                pull_request = Oj.load(response.to_s)
+                pull_request = JSON.parse(response.to_s)
                 pull_request['user']['login']
               end
 
diff --git a/lib/vite_ruby/sri_extensions.rb b/lib/vite_ruby/sri_extensions.rb
index 31363272bf..edff6f808e 100644
--- a/lib/vite_ruby/sri_extensions.rb
+++ b/lib/vite_ruby/sri_extensions.rb
@@ -15,7 +15,7 @@ module ViteRuby::ManifestIntegrityExtension
   end
 
   def load_name_lookup_cache
-    Oj.load(config.build_output_dir.join('.vite/manifest-lookup.json').read)
+    JSON.load_file(config.build_output_dir.join('.vite/manifest-lookup.json'))
   end
 
   # Upstream's `virtual` type is a hack, re-implement it with efficient exact name lookup
diff --git a/spec/fabricators/collection_item_fabricator.rb b/spec/fabricators/collection_item_fabricator.rb
index 7c4bcb3d85..c3f62ca15a 100644
--- a/spec/fabricators/collection_item_fabricator.rb
+++ b/spec/fabricators/collection_item_fabricator.rb
@@ -11,6 +11,5 @@ Fabricator(:unverified_remote_collection_item, from: :collection_item) do
   account      nil
   state        :pending
   object_uri   { Fabricate.build(:remote_account).uri }
-  approval_uri { sequence(:uri) { |i| "https://example.com/authorizations/#{i}" } }
   uri { sequence(:uri) { |i| "https://example.com/collection_items/#{i}" } }
 end
diff --git a/spec/lib/activitypub/activity/accept_spec.rb b/spec/lib/activitypub/activity/accept_spec.rb
index 615287389c..f7c1e1d617 100644
--- a/spec/lib/activitypub/activity/accept_spec.rb
+++ b/spec/lib/activitypub/activity/accept_spec.rb
@@ -171,5 +171,71 @@ RSpec.describe ActivityPub::Activity::Accept do
         end
       end
     end
+
+    context 'with a FeatureRequest', feature: :collections_federation do
+      let(:collection) { Fabricate(:collection, account: recipient) }
+      let(:collection_item) { Fabricate(:collection_item, collection:, account: sender, state: :pending) }
+      let(:object) { collection_item.activity_uri }
+      let(:approval_uri) { 'https://example.com/stamps/1' }
+      let(:json) do
+        {
+          'id' => 'https://example.com/accepts/1',
+          'type' => 'Accept',
+          'actor' => sender.uri,
+          'to' => ActivityPub::TagManager.instance.uri_for(recipient),
+          'object' => object,
+          'result' => approval_uri,
+        }
+      end
+
+      context 'when activity is valid' do
+        it 'accepts the collection item, stores the authorization uri and federates an `Add` activity' do
+          subject.perform
+
+          expect(collection_item.reload).to be_accepted
+          expect(collection_item.approval_uri).to eq 'https://example.com/stamps/1'
+          expect(ActivityPub::AccountRawDistributionWorker)
+            .to have_enqueued_sidekiq_job
+        end
+      end
+
+      context 'when activity is invalid' do
+        shared_examples 'ignoring activity' do
+          it 'does not accept the item and does not send out an activity' do
+            subject.perform
+
+            expect(collection_item.reload).to_not be_accepted
+            expect(collection_item.approval_uri).to be_nil
+            expect(ActivityPub::AccountRawDistributionWorker)
+              .to_not have_enqueued_sidekiq_job
+          end
+        end
+
+        context 'when matching collection item cannot be found' do
+          let(:object) { 'https://localhost/feature_requests/1' }
+
+          it_behaves_like 'ignoring activity'
+        end
+
+        context 'when the sender is not the featured account' do
+          let(:other_account) { Fabricate(:remote_account) }
+          let(:collection_item) { Fabricate(:collection_item, collection:, account: other_account, state: :pending) }
+
+          it_behaves_like 'ignoring activity'
+        end
+
+        context "when approval_uri does not match the sender's uri" do
+          let(:approval_uri) { 'https://other.localhost/authorizations/1' }
+
+          it_behaves_like 'ignoring activity'
+        end
+
+        context 'when approval_uri is missing' do
+          let(:approval_uri) { nil }
+
+          it_behaves_like 'ignoring activity'
+        end
+      end
+    end
   end
 end
diff --git a/spec/lib/activitypub/activity/announce_spec.rb b/spec/lib/activitypub/activity/announce_spec.rb
index 4becf2320d..986aa4186f 100644
--- a/spec/lib/activitypub/activity/announce_spec.rb
+++ b/spec/lib/activitypub/activity/announce_spec.rb
@@ -35,7 +35,7 @@ RSpec.describe ActivityPub::Activity::Announce do
     context 'when sender is followed by a local account' do
       before do
         Fabricate(:account).follow!(sender)
-        stub_request(:get, 'https://example.com/actor/hello-world').to_return(body: JSON.generate(unknown_object_json), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/actor/hello-world').to_return(body: unknown_object_json.to_json, headers: { 'Content-Type': 'application/activity+json' })
         subject.perform
       end
 
@@ -120,7 +120,7 @@ RSpec.describe ActivityPub::Activity::Announce do
       let(:object_json) { 'https://example.com/actor/hello-world' }
 
       before do
-        stub_request(:get, 'https://example.com/actor/hello-world').to_return(body: JSON.generate(unknown_object_json), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/actor/hello-world').to_return(body: unknown_object_json.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       context 'when the relay is enabled' do
diff --git a/spec/lib/activitypub/activity/create_spec.rb b/spec/lib/activitypub/activity/create_spec.rb
index 450b6daef7..3c5839e92d 100644
--- a/spec/lib/activitypub/activity/create_spec.rb
+++ b/spec/lib/activitypub/activity/create_spec.rb
@@ -1078,8 +1078,8 @@ RSpec.describe ActivityPub::Activity::Create do
           )
         end
 
-        before do
-          stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+        let(:quote_authorization_json) do
+          {
             '@context': [
               'https://www.w3.org/ns/activitystreams',
               {
@@ -1104,7 +1104,11 @@ RSpec.describe ActivityPub::Activity::Create do
             attributedTo: ActivityPub::TagManager.instance.uri_for(quoted_status.account),
             interactingObject: object_json[:id],
             interactionTarget: ActivityPub::TagManager.instance.uri_for(quoted_status),
-          }))
+          }
+        end
+
+        before do
+          stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
         end
 
         it 'creates a status with a verified quote' do
@@ -1134,8 +1138,8 @@ RSpec.describe ActivityPub::Activity::Create do
           )
         end
 
-        before do
-          stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+        let(:quote_authorization_json) do
+          {
             '@context': [
               'https://www.w3.org/ns/activitystreams',
               {
@@ -1160,7 +1164,11 @@ RSpec.describe ActivityPub::Activity::Create do
             attributedTo: ActivityPub::TagManager.instance.uri_for(quoted_status.account),
             interactingObject: object_json[:id],
             interactionTarget: ActivityPub::TagManager.instance.uri_for(quoted_status),
-          }))
+          }
+        end
+
+        before do
+          stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
         end
 
         it 'creates a status without the verified quote' do
@@ -1267,7 +1275,7 @@ RSpec.describe ActivityPub::Activity::Create do
       before do
         stub_request(:get, object_json[:id])
           .with(headers: { Authorization: "Bearer #{token}" })
-          .to_return(body: JSON.generate(object_json), headers: { 'Content-Type': 'application/activity+json' })
+          .to_return(body: object_json.to_json, headers: { 'Content-Type': 'application/activity+json' })
 
         subject.perform
       end
diff --git a/spec/lib/activitypub/activity/quote_request_spec.rb b/spec/lib/activitypub/activity/quote_request_spec.rb
index d68f01211d..84f931e618 100644
--- a/spec/lib/activitypub/activity/quote_request_spec.rb
+++ b/spec/lib/activitypub/activity/quote_request_spec.rb
@@ -65,7 +65,7 @@ RSpec.describe ActivityPub::Activity::QuoteRequest do
         expect { subject.perform }
           .to enqueue_sidekiq_job(ActivityPub::DeliveryWorker)
           .with(satisfying do |body|
-            outgoing_json = Oj.load(body)
+            outgoing_json = JSON.parse(body)
             outgoing_json['type'] == 'Reject' && %w(type id actor object instrument).all? { |key| json[key] == outgoing_json['object'][key] }
           end, recipient.id, sender.inbox_url)
       end
@@ -78,7 +78,7 @@ RSpec.describe ActivityPub::Activity::QuoteRequest do
         expect { subject.perform }
           .to enqueue_sidekiq_job(ActivityPub::DeliveryWorker)
           .with(satisfying do |body|
-            outgoing_json = Oj.load(body)
+            outgoing_json = JSON.parse(body)
             outgoing_json['type'] == 'Reject' && json['instrument']['id'] == outgoing_json['object']['instrument'] && %w(type id actor object).all? { |key| json[key] == outgoing_json['object'][key] }
           end, recipient.id, sender.inbox_url)
       end
@@ -86,7 +86,7 @@ RSpec.describe ActivityPub::Activity::QuoteRequest do
 
     context 'when trying to quote a quotable local status' do
       before do
-        stub_request(:get, 'https://example.com/unknown-status').to_return(status: 200, body: JSON.generate(status_json), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/unknown-status').to_return(status: 200, body: status_json.to_json, headers: { 'Content-Type': 'application/activity+json' })
         quoted_post.update(quote_approval_policy: InteractionPolicy::POLICY_FLAGS[:public] << 16)
       end
 
@@ -95,7 +95,7 @@ RSpec.describe ActivityPub::Activity::QuoteRequest do
           .to change { quoted_post.reload.quotes.accepted.count }.by(1)
           .and enqueue_sidekiq_job(ActivityPub::DeliveryWorker)
           .with(satisfying do |body|
-            outgoing_json = Oj.load(body)
+            outgoing_json = JSON.parse(body)
             outgoing_json['type'] == 'Accept' && %w(type id actor object instrument).all? { |key| json[key] == outgoing_json['object'][key] }
           end, recipient.id, sender.inbox_url)
       end
@@ -113,7 +113,7 @@ RSpec.describe ActivityPub::Activity::QuoteRequest do
           .to change { quoted_post.reload.quotes.accepted.count }.by(1)
           .and enqueue_sidekiq_job(ActivityPub::DeliveryWorker)
           .with(satisfying do |body|
-            outgoing_json = Oj.load(body)
+            outgoing_json = JSON.parse(body)
             outgoing_json['type'] == 'Accept' && json['instrument']['id'] == outgoing_json['object']['instrument'] && %w(type id actor object).all? { |key| json[key] == outgoing_json['object'][key] }
           end, recipient.id, sender.inbox_url)
       end
diff --git a/spec/lib/activitypub/activity/reject_spec.rb b/spec/lib/activitypub/activity/reject_spec.rb
index ee8557f123..8f58f02c71 100644
--- a/spec/lib/activitypub/activity/reject_spec.rb
+++ b/spec/lib/activitypub/activity/reject_spec.rb
@@ -3,7 +3,7 @@
 require 'rails_helper'
 
 RSpec.describe ActivityPub::Activity::Reject do
-  let(:sender)    { Fabricate(:account) }
+  let(:sender)    { Fabricate(:remote_account) }
   let(:recipient) { Fabricate(:account) }
 
   let(:json) do
@@ -129,12 +129,12 @@ RSpec.describe ActivityPub::Activity::Reject do
     context 'with a QuoteRequest' do
       let(:status) { Fabricate(:status, account: recipient) }
       let(:quoted_status) { Fabricate(:status, account: sender) }
-      let(:quote) { Fabricate(:quote, status: status, quoted_status: quoted_status, activity_uri: 'https://abc-123/456') }
+      let!(:quote) { Fabricate(:quote, status: status, quoted_status: quoted_status) }
       let(:approval_uri) { "https://#{sender.domain}/approvals/1" }
 
       let(:object_json) do
         {
-          id: 'https://abc-123/456',
+          id: quote.activity_uri,
           type: 'QuoteRequest',
           actor: ActivityPub::TagManager.instance.uri_for(recipient),
           object: ActivityPub::TagManager.instance.uri_for(quoted_status),
@@ -147,5 +147,23 @@ RSpec.describe ActivityPub::Activity::Reject do
           .to change { quote.reload.rejected? }.from(false).to(true)
       end
     end
+
+    context 'with a FeatureRequest' do
+      let(:collection) { Fabricate(:collection, account: recipient) }
+      let!(:collection_item) { Fabricate(:collection_item, collection:, account: sender, state: :pending) }
+      let(:json) do
+        {
+          'id' => 'https://example.com/accepts/1',
+          'type' => 'Accept',
+          'actor' => sender.uri,
+          'to' => ActivityPub::TagManager.instance.uri_for(recipient),
+          'object' => collection_item.activity_uri,
+        }
+      end
+
+      it 'deletes the collection item' do
+        expect { subject.perform }.to change(collection.collection_items, :count).by(-1)
+      end
+    end
   end
 end
diff --git a/spec/lib/activitypub/activity_spec.rb b/spec/lib/activitypub/activity_spec.rb
index a4976eb867..d8236191df 100644
--- a/spec/lib/activitypub/activity_spec.rb
+++ b/spec/lib/activitypub/activity_spec.rb
@@ -89,7 +89,7 @@ RSpec.describe ActivityPub::Activity do
     before do
       sender.update(uri: ActivityPub::TagManager.instance.uri_for(sender))
 
-      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate(approval_payload))
+      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: approval_payload.to_json)
     end
 
     context 'when getting them in order' do
diff --git a/spec/lib/activitypub/dereferencer_spec.rb b/spec/lib/activitypub/dereferencer_spec.rb
index 13eedf518f..a482ecaced 100644
--- a/spec/lib/activitypub/dereferencer_spec.rb
+++ b/spec/lib/activitypub/dereferencer_spec.rb
@@ -12,7 +12,7 @@ RSpec.describe ActivityPub::Dereferencer do
     let(:uri) { nil }
 
     before do
-      stub_request(:get, 'https://example.com/foo').to_return(body: JSON.generate(object), headers: { 'Content-Type' => 'application/activity+json' })
+      stub_request(:get, 'https://example.com/foo').to_return(body: object.to_json, headers: { 'Content-Type' => 'application/activity+json' })
     end
 
     context 'with a URI' do
diff --git a/spec/lib/activitypub/forwarder_spec.rb b/spec/lib/activitypub/forwarder_spec.rb
index 7276511a7d..81175ba8da 100644
--- a/spec/lib/activitypub/forwarder_spec.rb
+++ b/spec/lib/activitypub/forwarder_spec.rb
@@ -54,8 +54,8 @@ RSpec.describe ActivityPub::Forwarder do
 
     it 'correctly forwards to expected remote followers' do
       expect { subject.forward! }
-        .to enqueue_sidekiq_job(ActivityPub::LowPriorityDeliveryWorker).with(JSON.generate(payload), anything, eve.preferred_inbox_url)
-        .and enqueue_sidekiq_job(ActivityPub::LowPriorityDeliveryWorker).with(JSON.generate(payload), anything, mallory.preferred_inbox_url)
+        .to enqueue_sidekiq_job(ActivityPub::LowPriorityDeliveryWorker).with(payload.to_json, anything, eve.preferred_inbox_url)
+        .and enqueue_sidekiq_job(ActivityPub::LowPriorityDeliveryWorker).with(payload.to_json, anything, mallory.preferred_inbox_url)
     end
   end
 end
diff --git a/spec/lib/admin/system_check/elasticsearch_check_spec.rb b/spec/lib/admin/system_check/elasticsearch_check_spec.rb
index 702c19cf09..fe6585ff06 100644
--- a/spec/lib/admin/system_check/elasticsearch_check_spec.rb
+++ b/spec/lib/admin/system_check/elasticsearch_check_spec.rb
@@ -131,7 +131,7 @@ RSpec.describe Admin::SystemCheck::ElasticsearchCheck do
 
   def stub_elasticsearch_error
     client = instance_double(Elasticsearch::Client)
-    allow(client).to receive(:info).and_raise(Elasticsearch::Transport::Transport::Error)
+    allow(client).to receive(:info).and_raise(Elastic::Transport::Transport::Error)
     allow(Chewy).to receive(:client).and_return(client)
   end
 end
diff --git a/spec/lib/elasticsearch/client_extensions_spec.rb b/spec/lib/elasticsearch/client_extensions_spec.rb
new file mode 100644
index 0000000000..1d97bb8e03
--- /dev/null
+++ b/spec/lib/elasticsearch/client_extensions_spec.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Elasticsearch::ClientExtensions do
+  describe '#initialize' do
+    it 'marks the connection as verified on initialization' do
+      client = Elasticsearch::Client.new
+
+      expect(client.instance_variable_get(:@verified))
+        .to be(true)
+    end
+  end
+end
diff --git a/spec/lib/mastodon/cli/domains_spec.rb b/spec/lib/mastodon/cli/domains_spec.rb
index 0d2c7f70a8..39203fbdfa 100644
--- a/spec/lib/mastodon/cli/domains_spec.rb
+++ b/spec/lib/mastodon/cli/domains_spec.rb
@@ -87,7 +87,7 @@ RSpec.describe Mastodon::CLI::Domains do
         end
 
         def json_summary
-          JSON.generate('host.example': { activity: {} })
+          { 'host.example': { activity: {} } }.to_json
         end
       end
     end
diff --git a/spec/lib/mastodon/cli/search_spec.rb b/spec/lib/mastodon/cli/search_spec.rb
index 8a6c2492aa..63913ae8ba 100644
--- a/spec/lib/mastodon/cli/search_spec.rb
+++ b/spec/lib/mastodon/cli/search_spec.rb
@@ -36,7 +36,7 @@ RSpec.describe Mastodon::CLI::Search do
     context 'when server communication raises an error' do
       let(:options) { { reset_chewy: true } }
 
-      before { allow(Chewy::Stash::Specification).to receive(:reset!).and_raise(Elasticsearch::Transport::Transport::Errors::InternalServerError) }
+      before { allow(Chewy::Stash::Specification).to receive(:reset!).and_raise(Elastic::Transport::Transport::Errors::InternalServerError) }
 
       it 'Exits with error message' do
         expect { subject }
diff --git a/spec/lib/webhooks/payload_renderer_spec.rb b/spec/lib/webhooks/payload_renderer_spec.rb
index d4a330ea1c..7cd536fb05 100644
--- a/spec/lib/webhooks/payload_renderer_spec.rb
+++ b/spec/lib/webhooks/payload_renderer_spec.rb
@@ -3,27 +3,34 @@
 require 'rails_helper'
 
 RSpec.describe Webhooks::PayloadRenderer do
-  subject(:renderer) { described_class.new(json) }
+  subject(:renderer) { described_class.new(payload.to_json) }
 
   let(:event)   { Webhooks::EventPresenter.new(type, object) }
   let(:payload) { ActiveModelSerializers::SerializableResource.new(event, serializer: REST::Admin::WebhookEventSerializer, scope: nil, scope_name: :current_user).as_json }
-  let(:json)    { JSON.generate(payload) }
 
   describe '#render' do
+    subject { renderer.render(template) }
+
     context 'when event is account.approved' do
       let(:type)   { 'account.approved' }
-      let(:object) { Fabricate(:account, display_name: 'Foo"') }
+      let(:object) { Fabricate(:account, display_name: 'Foo"', username: 'foofoobarbar') }
 
-      it 'renders event-related variables into template' do
-        expect(renderer.render('foo={{event}}')).to eq 'foo=account.approved'
+      context 'with event-related variables' do
+        let(:template) { 'foo={{event}}' }
+
+        it { is_expected.to eq('foo=account.approved') }
       end
 
-      it 'renders event-specific variables into template' do
-        expect(renderer.render('foo={{object.username}}')).to eq "foo=#{object.username}"
+      context 'with event-specific variables' do
+        let(:template) { 'foo={{object.username}}' }
+
+        it { is_expected.to eq('foo=foofoobarbar') }
       end
 
-      it 'escapes values for use in JSON' do
-        expect(renderer.render('foo={{object.account.display_name}}')).to eq 'foo=Foo\\"'
+      context 'with values needing JSON escape' do
+        let(:template) { 'foo={{object.account.display_name}}' }
+
+        it { is_expected.to eq('foo=Foo\\"') }
       end
     end
   end
diff --git a/spec/models/account/avatar_spec.rb b/spec/models/account/avatar_spec.rb
index 05d5c16e60..30751e9cc2 100644
--- a/spec/models/account/avatar_spec.rb
+++ b/spec/models/account/avatar_spec.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'rails_helper'
+
 RSpec.describe Account::Avatar do
   describe 'static avatars', :attachment_processing do
     describe 'with a square GIF' do
diff --git a/spec/models/account/header_spec.rb b/spec/models/account/header_spec.rb
index 9faf30a3db..79423e2d25 100644
--- a/spec/models/account/header_spec.rb
+++ b/spec/models/account/header_spec.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'rails_helper'
+
 RSpec.describe Account::Header do
   describe 'base64-encoded files', :attachment_processing do
     let(:base64_attachment) { "data:image/jpeg;base64,#{Base64.encode64(attachment_fixture('attachment.jpg').read)}" }
diff --git a/spec/models/account/search_spec.rb b/spec/models/account/search_spec.rb
index a67eddf63d..a806dbd92c 100644
--- a/spec/models/account/search_spec.rb
+++ b/spec/models/account/search_spec.rb
@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'rails_helper'
+
 RSpec.describe Account::Search do
   describe '.search_for' do
     before do
diff --git a/spec/requests/api/v1/donation_campaigns_spec.rb b/spec/requests/api/v1/donation_campaigns_spec.rb
index 90add50820..a9bc0c3190 100644
--- a/spec/requests/api/v1/donation_campaigns_spec.rb
+++ b/spec/requests/api/v1/donation_campaigns_spec.rb
@@ -91,7 +91,7 @@ RSpec.describe 'Donation campaigns' do
         end
 
         before do
-          stub_request(:get, "#{api_url}?platform=web&seed=#{seed}&locale=en").to_return(body: JSON.generate(campaign_json), status: 200)
+          stub_request(:get, "#{api_url}?platform=web&seed=#{seed}&locale=en").to_return(body: campaign_json.to_json, status: 200)
         end
 
         it 'returns the expected campaign' do
@@ -109,7 +109,7 @@ RSpec.describe 'Donation campaigns' do
           expect(Rails.cache.read("donation_campaign_request:#{seed}:en", raw: true))
             .to eq 'campaign-1:en'
 
-          expect(Oj.load(Rails.cache.read('donation_campaign:campaign-1:en', raw: true)))
+          expect(JSON.parse(Rails.cache.read('donation_campaign:campaign-1:en', raw: true)))
             .to match(campaign_json)
         end
       end
diff --git a/spec/services/activitypub/fetch_featured_collection_service_spec.rb b/spec/services/activitypub/fetch_featured_collection_service_spec.rb
index 24c5fa0a06..71462e65e0 100644
--- a/spec/services/activitypub/fetch_featured_collection_service_spec.rb
+++ b/spec/services/activitypub/fetch_featured_collection_service_spec.rb
@@ -75,11 +75,11 @@ RSpec.describe ActivityPub::FetchFeaturedCollectionService do
 
     shared_examples 'sets pinned posts' do
       before do
-        stub_request(:get, 'https://example.com/account/pinned/known').to_return(status: 200, body: JSON.generate(status_json_pinned_known), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/account/pinned/unknown-inlined').to_return(status: 200, body: JSON.generate(status_json_pinned_unknown_inlined), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/account/pinned/known').to_return(status: 200, body: status_json_pinned_known.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/account/pinned/unknown-inlined').to_return(status: 200, body: status_json_pinned_unknown_inlined.to_json, headers: { 'Content-Type': 'application/activity+json' })
         stub_request(:get, 'https://example.com/account/pinned/unknown-unreachable').to_return(status: 404)
-        stub_request(:get, 'https://example.com/account/pinned/unknown-reachable').to_return(status: 200, body: JSON.generate(status_json_pinned_unknown_reachable), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/account/collections/featured').to_return(status: 200, body: JSON.generate(featured_with_null), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/account/pinned/unknown-reachable').to_return(status: 200, body: status_json_pinned_unknown_reachable.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/account/collections/featured').to_return(status: 200, body: featured_with_null.to_json, headers: { 'Content-Type': 'application/activity+json' })
 
         subject
       end
@@ -101,7 +101,7 @@ RSpec.describe ActivityPub::FetchFeaturedCollectionService do
         let(:collection_or_uri) { actor.featured_collection_url }
 
         before do
-          stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it_behaves_like 'sets pinned posts'
@@ -122,7 +122,7 @@ RSpec.describe ActivityPub::FetchFeaturedCollectionService do
 
     context 'when the endpoint is a Collection' do
       before do
-        stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'sets pinned posts'
@@ -139,7 +139,7 @@ RSpec.describe ActivityPub::FetchFeaturedCollectionService do
       end
 
       before do
-        stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'sets pinned posts'
@@ -148,11 +148,12 @@ RSpec.describe ActivityPub::FetchFeaturedCollectionService do
         let(:items) { 'https://example.com/account/pinned/unknown-reachable' }
 
         before do
-          stub_request(:get, 'https://example.com/account/pinned/unknown-reachable').to_return(status: 200, body: JSON.generate(status_json_pinned_unknown_reachable), headers: { 'Content-Type': 'application/activity+json' })
-          subject
+          stub_request(:get, 'https://example.com/account/pinned/unknown-reachable').to_return(status: 200, body: status_json_pinned_unknown_reachable.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'sets expected posts as pinned posts' do
+          subject
+
           expect(actor.pinned_statuses.pluck(:uri)).to contain_exactly(
             'https://example.com/account/pinned/unknown-reachable'
           )
@@ -175,7 +176,7 @@ RSpec.describe ActivityPub::FetchFeaturedCollectionService do
       end
 
       before do
-        stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, actor.featured_collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'sets pinned posts'
@@ -184,11 +185,12 @@ RSpec.describe ActivityPub::FetchFeaturedCollectionService do
         let(:items) { 'https://example.com/account/pinned/unknown-reachable' }
 
         before do
-          stub_request(:get, 'https://example.com/account/pinned/unknown-reachable').to_return(status: 200, body: JSON.generate(status_json_pinned_unknown_reachable), headers: { 'Content-Type': 'application/activity+json' })
-          subject
+          stub_request(:get, 'https://example.com/account/pinned/unknown-reachable').to_return(status: 200, body: status_json_pinned_unknown_reachable.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'sets expected posts as pinned posts' do
+          subject
+
           expect(actor.pinned_statuses.pluck(:uri)).to contain_exactly(
             'https://example.com/account/pinned/unknown-reachable'
           )
diff --git a/spec/services/activitypub/fetch_featured_tags_collection_service_spec.rb b/spec/services/activitypub/fetch_featured_tags_collection_service_spec.rb
index 91b5267bdf..e8ffea546d 100644
--- a/spec/services/activitypub/fetch_featured_tags_collection_service_spec.rb
+++ b/spec/services/activitypub/fetch_featured_tags_collection_service_spec.rb
@@ -38,7 +38,7 @@ RSpec.describe ActivityPub::FetchFeaturedTagsCollectionService do
   describe '#call' do
     context 'when the endpoint is a Collection' do
       before do
-        stub_request(:get, collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'sets featured tags'
@@ -46,7 +46,7 @@ RSpec.describe ActivityPub::FetchFeaturedTagsCollectionService do
 
     context 'when the account already has featured tags' do
       before do
-        stub_request(:get, collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
 
         actor.featured_tags.create!(name: 'FoO')
         actor.featured_tags.create!(name: 'baz')
@@ -67,7 +67,7 @@ RSpec.describe ActivityPub::FetchFeaturedTagsCollectionService do
       end
 
       before do
-        stub_request(:get, collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'sets featured tags'
@@ -88,7 +88,7 @@ RSpec.describe ActivityPub::FetchFeaturedTagsCollectionService do
       end
 
       before do
-        stub_request(:get, collection_url).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_url).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'sets featured tags'
diff --git a/spec/services/activitypub/fetch_remote_account_service_spec.rb b/spec/services/activitypub/fetch_remote_account_service_spec.rb
index 30d693fa4b..6d3d8a252b 100644
--- a/spec/services/activitypub/fetch_remote_account_service_spec.rb
+++ b/spec/services/activitypub/fetch_remote_account_service_spec.rb
@@ -38,8 +38,8 @@ RSpec.describe ActivityPub::FetchRemoteAccountService do
       before do
         actor[:inbox] = nil
 
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and returns nil' do
@@ -54,8 +54,8 @@ RSpec.describe ActivityPub::FetchRemoteAccountService do
       let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/alice', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and sets attributes' do
@@ -75,9 +75,9 @@ RSpec.describe ActivityPub::FetchRemoteAccountService do
       let!(:webfinger) { { subject: 'acct:alice@iscool.af', links: [{ rel: 'self', href: 'https://example.com/alice', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
-        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and follows redirection and sets attributes' do
@@ -98,8 +98,8 @@ RSpec.describe ActivityPub::FetchRemoteAccountService do
       let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/bob', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and does not create account' do
@@ -114,9 +114,9 @@ RSpec.describe ActivityPub::FetchRemoteAccountService do
       let!(:webfinger) { { subject: 'acct:alice@iscool.af', links: [{ rel: 'self', href: 'https://example.com/bob', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
-        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and follows redirect and does not create account' do
@@ -130,7 +130,7 @@ RSpec.describe ActivityPub::FetchRemoteAccountService do
 
     context 'with wrong id' do
       it 'does not create account' do
-        expect(subject.call('https://fake.address/@foo', prefetched_body: JSON.generate(actor))).to be_nil
+        expect(subject.call('https://fake.address/@foo', prefetched_body: actor.to_json)).to be_nil
       end
     end
   end
diff --git a/spec/services/activitypub/fetch_remote_actor_service_spec.rb b/spec/services/activitypub/fetch_remote_actor_service_spec.rb
index 36457c207c..61b1e15c95 100644
--- a/spec/services/activitypub/fetch_remote_actor_service_spec.rb
+++ b/spec/services/activitypub/fetch_remote_actor_service_spec.rb
@@ -38,8 +38,8 @@ RSpec.describe ActivityPub::FetchRemoteActorService do
       before do
         actor[:inbox] = nil
 
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and returns nil' do
@@ -54,8 +54,8 @@ RSpec.describe ActivityPub::FetchRemoteActorService do
       let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/alice', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and sets values' do
@@ -75,9 +75,9 @@ RSpec.describe ActivityPub::FetchRemoteActorService do
       let!(:webfinger) { { subject: 'acct:alice@iscool.af', links: [{ rel: 'self', href: 'https://example.com/alice', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
-        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and follows redirect and sets values' do
@@ -98,8 +98,8 @@ RSpec.describe ActivityPub::FetchRemoteActorService do
       let!(:webfinger) { { subject: 'acct:alice@example.com', links: [{ rel: 'self', href: 'https://example.com/bob', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and does not create account' do
@@ -114,9 +114,9 @@ RSpec.describe ActivityPub::FetchRemoteActorService do
       let!(:webfinger) { { subject: 'acct:alice@iscool.af', links: [{ rel: 'self', href: 'https://example.com/bob', type: 'application/activity+json' }] } }
 
       before do
-        stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
-        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
+        stub_request(:get, 'https://iscool.af/.well-known/webfinger?resource=acct:alice@iscool.af').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
       end
 
       it 'fetches resource and looks up webfinger and follows redirect and does not create account' do
@@ -130,7 +130,7 @@ RSpec.describe ActivityPub::FetchRemoteActorService do
 
     context 'with wrong id' do
       it 'does not create account' do
-        expect(subject.call('https://fake.address/@foo', prefetched_body: JSON.generate(actor))).to be_nil
+        expect(subject.call('https://fake.address/@foo', prefetched_body: actor.to_json)).to be_nil
       end
     end
   end
diff --git a/spec/services/activitypub/fetch_remote_key_service_spec.rb b/spec/services/activitypub/fetch_remote_key_service_spec.rb
index 635a07c26b..f5df52d5ba 100644
--- a/spec/services/activitypub/fetch_remote_key_service_spec.rb
+++ b/spec/services/activitypub/fetch_remote_key_service_spec.rb
@@ -50,8 +50,8 @@ RSpec.describe ActivityPub::FetchRemoteKeyService do
   end
 
   before do
-    stub_request(:get, 'https://example.com/alice').to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
-    stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: JSON.generate(webfinger), headers: { 'Content-Type': 'application/jrd+json' })
+    stub_request(:get, 'https://example.com/alice').to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
+    stub_request(:get, 'https://example.com/.well-known/webfinger?resource=acct:alice@example.com').to_return(body: webfinger.to_json, headers: { 'Content-Type': 'application/jrd+json' })
   end
 
   describe '#call' do
@@ -59,7 +59,7 @@ RSpec.describe ActivityPub::FetchRemoteKeyService do
 
     context 'when the key is a sub-object from the actor' do
       before do
-        stub_request(:get, public_key_id).to_return(body: JSON.generate(actor), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, public_key_id).to_return(body: actor.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it 'returns the expected account' do
@@ -71,7 +71,7 @@ RSpec.describe ActivityPub::FetchRemoteKeyService do
       let(:public_key_id) { 'https://example.com/alice-public-key.json' }
 
       before do
-        stub_request(:get, public_key_id).to_return(body: JSON.generate(key_json.merge({ '@context': ['https://w3id.org/security/v1'] })), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, public_key_id).to_return(body: key_json.merge({ '@context': ['https://w3id.org/security/v1'] }).to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it 'returns the expected account' do
@@ -84,7 +84,7 @@ RSpec.describe ActivityPub::FetchRemoteKeyService do
       let(:actor_public_key) { 'https://example.com/alice-public-key.json' }
 
       before do
-        stub_request(:get, public_key_id).to_return(body: JSON.generate(key_json.merge({ '@context': ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1'] })), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, public_key_id).to_return(body: key_json.merge({ '@context': ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1'] }).to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it 'returns the nil' do
diff --git a/spec/services/activitypub/fetch_remote_status_service_spec.rb b/spec/services/activitypub/fetch_remote_status_service_spec.rb
index e37fcca7a0..d7196d8dab 100644
--- a/spec/services/activitypub/fetch_remote_status_service_spec.rb
+++ b/spec/services/activitypub/fetch_remote_status_service_spec.rb
@@ -11,7 +11,7 @@ RSpec.describe ActivityPub::FetchRemoteStatusService do
 
   let(:follower) { Fabricate(:account, username: 'alice') }
   let(:follow) { nil }
-  let(:response) { { body: JSON.generate(object), headers: { 'content-type': 'application/activity+json' } } }
+  let(:response) { { body: object.to_json, headers: { 'content-type': 'application/activity+json' } } }
   let(:existing_status) { nil }
 
   let(:note) do
@@ -369,7 +369,7 @@ RSpec.describe ActivityPub::FetchRemoteStatusService do
       end
 
       it 'creates statuses but not more than limit allows' do
-        expect { subject.call(object[:id], prefetched_body: JSON.generate(object)) }
+        expect { subject.call(object[:id], prefetched_body: object.to_json) }
           .to change { sender.statuses.count }.by_at_least(2)
           .and change { sender.statuses.count }.by_at_most(3)
       end
@@ -419,7 +419,7 @@ RSpec.describe ActivityPub::FetchRemoteStatusService do
       end
 
       it 'creates statuses but not more than limit allows' do
-        expect { subject.call(object[:id], prefetched_body: JSON.generate(object)) }
+        expect { subject.call(object[:id], prefetched_body: object.to_json) }
           .to change { sender.statuses.count }.by_at_least(2)
           .and change { sender.statuses.count }.by_at_most(3)
       end
diff --git a/spec/services/activitypub/fetch_replies_service_spec.rb b/spec/services/activitypub/fetch_replies_service_spec.rb
index 1442755c53..f84a44f931 100644
--- a/spec/services/activitypub/fetch_replies_service_spec.rb
+++ b/spec/services/activitypub/fetch_replies_service_spec.rb
@@ -58,7 +58,7 @@ RSpec.describe ActivityPub::FetchRepliesService do
 
       context 'when passing the URL to the collection' do
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'spawns workers for up to 5 replies on the same server' do
@@ -93,7 +93,7 @@ RSpec.describe ActivityPub::FetchRepliesService do
 
       context 'when passing the URL to the collection' do
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'spawns workers for up to 5 replies on the same server' do
@@ -132,7 +132,7 @@ RSpec.describe ActivityPub::FetchRepliesService do
 
       context 'when passing the URL to the collection' do
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'spawns workers for up to 5 replies on the same server' do
diff --git a/spec/services/activitypub/process_collection_service_spec.rb b/spec/services/activitypub/process_collection_service_spec.rb
index cee4272c22..c5fa38c641 100644
--- a/spec/services/activitypub/process_collection_service_spec.rb
+++ b/spec/services/activitypub/process_collection_service_spec.rb
@@ -21,7 +21,7 @@ RSpec.describe ActivityPub::ProcessCollectionService do
     }
   end
 
-  let(:json) { JSON.generate(payload) }
+  let(:json) { payload.to_json }
 
   describe '#call' do
     context 'when actor is suspended' do
diff --git a/spec/services/activitypub/process_featured_item_service_spec.rb b/spec/services/activitypub/process_featured_item_service_spec.rb
index dc04ce5d08..55bf89df91 100644
--- a/spec/services/activitypub/process_featured_item_service_spec.rb
+++ b/spec/services/activitypub/process_featured_item_service_spec.rb
@@ -52,7 +52,7 @@ RSpec.describe ActivityPub::ProcessFeaturedItemService do
 
       new_item = collection.collection_items.last
       expect(new_item.object_uri).to eq 'https://example.com/actor/1'
-      expect(new_item.approval_uri).to eq 'https://example.com/auth/1'
+      expect(new_item.approval_uri).to be_nil
     end
 
     context 'when an item exists for a local featured account' do
@@ -93,7 +93,7 @@ RSpec.describe ActivityPub::ProcessFeaturedItemService do
 
       new_item = collection.collection_items.last
       expect(new_item.object_uri).to eq 'https://example.com/actor/1'
-      expect(new_item.approval_uri).to eq 'https://example.com/auth/1'
+      expect(new_item.approval_uri).to be_nil
     end
   end
 end
diff --git a/spec/services/activitypub/process_status_update_service_spec.rb b/spec/services/activitypub/process_status_update_service_spec.rb
index 8279411a33..bcff6f1c41 100644
--- a/spec/services/activitypub/process_status_update_service_spec.rb
+++ b/spec/services/activitypub/process_status_update_service_spec.rb
@@ -23,7 +23,7 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
       ],
     }
   end
-  let(:json) { Oj.load(JSON.generate(payload)) }
+  let(:json) { JSON.parse(payload.to_json) }
 
   let(:alice) { Fabricate(:account) }
   let(:bob) { Fabricate(:account) }
@@ -544,8 +544,8 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
       }
     end
 
-    before do
-      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+    let(:quote_authorization_json) do
+      {
         '@context': [
           'https://www.w3.org/ns/activitystreams',
           {
@@ -570,7 +570,11 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
         attributedTo: ActivityPub::TagManager.instance.uri_for(quoted_status.account),
         interactingObject: ActivityPub::TagManager.instance.uri_for(status),
         interactionTarget: ActivityPub::TagManager.instance.uri_for(quoted_status),
-      }))
+      }
+    end
+
+    before do
+      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
     end
 
     it 'updates the approval URI and verifies the quote' do
@@ -609,8 +613,8 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
       }
     end
 
-    before do
-      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+    let(:quote_authorization_json) do
+      {
         '@context': [
           'https://www.w3.org/ns/activitystreams',
           {
@@ -635,7 +639,11 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
         attributedTo: ActivityPub::TagManager.instance.uri_for(quoted_status.account),
         interactingObject: ActivityPub::TagManager.instance.uri_for(status),
         interactionTarget: ActivityPub::TagManager.instance.uri_for(quoted_status),
-      }))
+      }
+    end
+
+    before do
+      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
     end
 
     it 'updates the approval URI and verifies the quote' do
@@ -818,8 +826,8 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
       }
     end
 
-    before do
-      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+    let(:quote_authorization_json) do
+      {
         '@context': [
           'https://www.w3.org/ns/activitystreams',
           {
@@ -844,7 +852,11 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
         attributedTo: ActivityPub::TagManager.instance.uri_for(quoted_status.account),
         interactingObject: ActivityPub::TagManager.instance.uri_for(status),
         interactionTarget: ActivityPub::TagManager.instance.uri_for(quoted_status),
-      }))
+      }
+    end
+
+    before do
+      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
     end
 
     it 'updates the approval URI and verifies the quote' do
@@ -883,8 +895,8 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
       }
     end
 
-    before do
-      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+    let(:quote_authorization_json) do
+      {
         '@context': [
           'https://www.w3.org/ns/activitystreams',
           {
@@ -909,7 +921,11 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
         attributedTo: ActivityPub::TagManager.instance.uri_for(quoted_status.account),
         interactingObject: ActivityPub::TagManager.instance.uri_for(status),
         interactionTarget: ActivityPub::TagManager.instance.uri_for(quoted_status),
-      }))
+      }
+    end
+
+    before do
+      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
     end
 
     it 'updates the approval URI but does not verify the quote' do
@@ -1126,8 +1142,8 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
       }
     end
 
-    before do
-      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+    let(:quote_authorization_json) do
+      {
         '@context': [
           'https://www.w3.org/ns/activitystreams',
           {
@@ -1152,7 +1168,11 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
         attributedTo: ActivityPub::TagManager.instance.uri_for(quoted_status.account),
         interactingObject: ActivityPub::TagManager.instance.uri_for(status),
         interactionTarget: ActivityPub::TagManager.instance.uri_for(quoted_status),
-      }))
+      }
+    end
+
+    before do
+      stub_request(:get, approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
     end
 
     it 'updates the URI and unverifies the quote' do
@@ -1234,8 +1254,8 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
       }
     end
 
-    before do
-      stub_request(:get, second_approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+    let(:quote_authorization_json) do
+      {
         '@context': [
           'https://www.w3.org/ns/activitystreams',
           {
@@ -1260,7 +1280,11 @@ RSpec.describe ActivityPub::ProcessStatusUpdateService do
         attributedTo: ActivityPub::TagManager.instance.uri_for(second_quoted_status.account),
         interactingObject: ActivityPub::TagManager.instance.uri_for(status),
         interactionTarget: ActivityPub::TagManager.instance.uri_for(second_quoted_status),
-      }))
+      }
+    end
+
+    before do
+      stub_request(:get, second_approval_uri).to_return(headers: { 'Content-Type': 'application/activity+json' }, body: quote_authorization_json.to_json)
     end
 
     it 'updates the URI and unverifies the quote' do
diff --git a/spec/services/activitypub/synchronize_followers_service_spec.rb b/spec/services/activitypub/synchronize_followers_service_spec.rb
index c41783f7c4..5d577bd006 100644
--- a/spec/services/activitypub/synchronize_followers_service_spec.rb
+++ b/spec/services/activitypub/synchronize_followers_service_spec.rb
@@ -55,7 +55,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
 
     context 'when the endpoint is a Collection of actor URIs' do
       before do
-        stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'synchronizes followers'
@@ -72,7 +72,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
       end
 
       before do
-        stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'synchronizes followers'
@@ -93,7 +93,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
       end
 
       before do
-        stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'synchronizes followers'
@@ -102,31 +102,31 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
     context 'when the endpoint is a paginated Collection of actor URIs split across multiple pages' do
       before do
         stub_request(:get, 'https://example.com/partial-followers')
-          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: {
             '@context': 'https://www.w3.org/ns/activitystreams',
             type: 'Collection',
             id: 'https://example.com/partial-followers',
             first: 'https://example.com/partial-followers/1',
-          }))
+          }.to_json)
 
         stub_request(:get, 'https://example.com/partial-followers/1')
-          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: {
             '@context': 'https://www.w3.org/ns/activitystreams',
             type: 'CollectionPage',
             id: 'https://example.com/partial-followers/1',
             partOf: 'https://example.com/partial-followers',
             next: 'https://example.com/partial-followers/2',
             items: [alice, eve].map { |account| ActivityPub::TagManager.instance.uri_for(account) },
-          }))
+          }.to_json)
 
         stub_request(:get, 'https://example.com/partial-followers/2')
-          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: {
             '@context': 'https://www.w3.org/ns/activitystreams',
             type: 'CollectionPage',
             id: 'https://example.com/partial-followers/2',
             partOf: 'https://example.com/partial-followers',
             items: ActivityPub::TagManager.instance.uri_for(mallory),
-          }))
+          }.to_json)
       end
 
       it_behaves_like 'synchronizes followers'
@@ -135,22 +135,22 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
     context 'when the endpoint is a paginated Collection of actor URIs split across, but one page errors out' do
       before do
         stub_request(:get, 'https://example.com/partial-followers')
-          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: {
             '@context': 'https://www.w3.org/ns/activitystreams',
             type: 'Collection',
             id: 'https://example.com/partial-followers',
             first: 'https://example.com/partial-followers/1',
-          }))
+          }.to_json)
 
         stub_request(:get, 'https://example.com/partial-followers/1')
-          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: JSON.generate({
+          .to_return(status: 200, headers: { 'Content-Type': 'application/activity+json' }, body: {
             '@context': 'https://www.w3.org/ns/activitystreams',
             type: 'CollectionPage',
             id: 'https://example.com/partial-followers/1',
             partOf: 'https://example.com/partial-followers',
             next: 'https://example.com/partial-followers/2',
             items: [mallory].map { |account| ActivityPub::TagManager.instance.uri_for(account) },
-          }))
+          }.to_json)
 
         stub_request(:get, 'https://example.com/partial-followers/2')
           .to_return(status: 404)
@@ -185,7 +185,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
 
       before do
         stub_const('ActivityPub::SynchronizeFollowersService::MAX_COLLECTION_PAGES', 1)
-        stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it 'confirms pending follow request but does not remove extra followers' do
@@ -213,7 +213,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
 
       context 'when the endpoint is a Collection of actor URIs' do
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it_behaves_like 'synchronizes followers'
@@ -230,7 +230,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
         end
 
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it_behaves_like 'synchronizes followers'
@@ -251,7 +251,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
         end
 
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it_behaves_like 'synchronizes followers'
@@ -263,7 +263,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
 
       context 'when the endpoint is a Collection of actor URIs' do
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'does not remove followers' do
@@ -286,7 +286,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
         end
 
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'does not remove followers' do
@@ -313,7 +313,7 @@ RSpec.describe ActivityPub::SynchronizeFollowersService do
         end
 
         before do
-          stub_request(:get, collection_uri).to_return(status: 200, body: JSON.generate(payload), headers: { 'Content-Type': 'application/activity+json' })
+          stub_request(:get, collection_uri).to_return(status: 200, body: payload.to_json, headers: { 'Content-Type': 'application/activity+json' })
         end
 
         it 'does not remove followers' do
diff --git a/spec/services/activitypub/verify_featured_item_service_spec.rb b/spec/services/activitypub/verify_featured_item_service_spec.rb
index 5976ffeffc..5698c23155 100644
--- a/spec/services/activitypub/verify_featured_item_service_spec.rb
+++ b/spec/services/activitypub/verify_featured_item_service_spec.rb
@@ -12,14 +12,14 @@ RSpec.describe ActivityPub::VerifyFeaturedItemService do
               account: nil,
               state: :pending,
               uri: 'https://other.example.com/items/1',
-              object_uri: 'https://example.com/actor/1',
-              approval_uri: verification_json['id'])
+              object_uri: 'https://example.com/actor/1')
   end
+  let(:approval_uri) { 'https://example.com/auth/1' }
   let(:verification_json) do
     {
       '@context' => 'https://www.w3.org/ns/activitystreams',
       'type' => 'FeatureAuthorization',
-      'id' => 'https://example.com/auth/1',
+      'id' => approval_uri,
       'interactionTarget' => 'https://example.com/actor/1',
       'interactingObject' => collection.uri,
     }
@@ -41,12 +41,13 @@ RSpec.describe ActivityPub::VerifyFeaturedItemService do
       before { featured_account }
 
       it 'verifies and creates the item' do
-        subject.call(collection_item)
+        subject.call(collection_item, approval_uri)
 
         expect(verification_request).to have_been_requested
 
         expect(collection_item.account_id).to eq featured_account.id
         expect(collection_item).to be_accepted
+        expect(collection_item.approval_uri).to eq approval_uri
       end
     end
 
@@ -59,13 +60,14 @@ RSpec.describe ActivityPub::VerifyFeaturedItemService do
       end
 
       it 'fetches the actor and creates the item' do
-        subject.call(collection_item)
+        subject.call(collection_item, approval_uri)
 
         expect(stubbed_service).to have_received(:call)
         expect(verification_request).to have_been_requested
 
         expect(collection_item.account_id).to eq featured_account.id
         expect(collection_item).to be_accepted
+        expect(collection_item.approval_uri).to eq approval_uri
       end
     end
   end
@@ -77,7 +79,7 @@ RSpec.describe ActivityPub::VerifyFeaturedItemService do
     end
 
     it 'creates item without attached account and in proper state' do
-      subject.call(collection_item)
+      subject.call(collection_item, approval_uri)
 
       expect(collection_item.account_id).to be_nil
       expect(collection_item).to be_rejected
diff --git a/spec/services/activitypub/verify_quote_service_spec.rb b/spec/services/activitypub/verify_quote_service_spec.rb
index 5c9248dbb9..9309eeb537 100644
--- a/spec/services/activitypub/verify_quote_service_spec.rb
+++ b/spec/services/activitypub/verify_quote_service_spec.rb
@@ -76,7 +76,7 @@ RSpec.describe ActivityPub::VerifyQuoteService do
 
     before do
       stub_request(:get, approval_uri)
-        .to_return(status: 200, body: JSON.generate(json), headers: { 'Content-Type': 'application/activity+json' })
+        .to_return(status: 200, body: json.to_json, headers: { 'Content-Type': 'application/activity+json' })
     end
 
     context 'with a valid activity for already-fetched posts' do
@@ -179,7 +179,7 @@ RSpec.describe ActivityPub::VerifyQuoteService do
 
     context 'with a valid activity for already-fetched posts, with a pre-fetched approval' do
       it 'updates the status without fetching the activity' do
-        expect { subject.call(quote, prefetched_approval: JSON.generate(json)) }
+        expect { subject.call(quote, prefetched_approval: json.to_json) }
           .to change(quote, :state).to('accepted')
 
         expect(a_request(:get, approval_uri))
diff --git a/spec/services/fetch_remote_status_service_spec.rb b/spec/services/fetch_remote_status_service_spec.rb
index 2b7ff9cbdc..3dcd3b885d 100644
--- a/spec/services/fetch_remote_status_service_spec.rb
+++ b/spec/services/fetch_remote_status_service_spec.rb
@@ -19,17 +19,15 @@ RSpec.describe FetchRemoteStatusService do
   context 'when protocol is :activitypub' do
     subject { described_class.new.call(note[:id], prefetched_body: prefetched_body) }
 
-    let(:prefetched_body) { JSON.generate(note) }
-
-    before do
-      subject
-    end
+    let(:prefetched_body) { note.to_json }
 
     it 'creates status' do
-      status = account.statuses.first
+      expect { subject }
+        .to change(Status, :count).by(1)
 
-      expect(status).to_not be_nil
-      expect(status.text).to eq 'Lorem ipsum'
+      expect(account.statuses.first)
+        .to be_present
+        .and have_attributes(text: 'Lorem ipsum')
     end
   end
 end
diff --git a/spec/services/resolve_account_service_spec.rb b/spec/services/resolve_account_service_spec.rb
index 897f7cf44f..4714606343 100644
--- a/spec/services/resolve_account_service_spec.rb
+++ b/spec/services/resolve_account_service_spec.rb
@@ -150,7 +150,7 @@ RSpec.describe ResolveAccountService do
   end
 
   context 'with webfinger response subject missing a host value' do
-    let(:body) { JSON.generate({ subject: 'user@' }) }
+    let(:body) { { subject: 'user@' }.to_json }
     let(:url) { 'https://host.example/.well-known/webfinger?resource=acct:user@host.example' }
 
     before do
diff --git a/spec/services/software_update_check_service_spec.rb b/spec/services/software_update_check_service_spec.rb
index 8f04b85d58..581e494ada 100644
--- a/spec/services/software_update_check_service_spec.rb
+++ b/spec/services/software_update_check_service_spec.rb
@@ -92,7 +92,7 @@ RSpec.describe SoftwareUpdateCheckService do
       end
 
       before do
-        stub_request(:get, full_update_check_url).to_return(body: JSON.generate(server_json))
+        stub_request(:get, full_update_check_url).to_return(body: server_json.to_json)
       end
 
       it 'updates the list of known updates' do
diff --git a/spec/support/streaming_client.rb b/spec/support/streaming_client.rb
index c9a97ab060..005ddd922e 100644
--- a/spec/support/streaming_client.rb
+++ b/spec/support/streaming_client.rb
@@ -161,8 +161,8 @@ class StreamingClient
 
   def wait_for_message
     message = @connection.wait_for_event(:message)
-    event = Oj.load(message)
-    event['payload'] = Oj.load(event['payload']) if event['payload']
+    event = JSON.parse(message)
+    event['payload'] = JSON.parse(event['payload']) if event['payload']
 
     event.deep_symbolize_keys
   end
diff --git a/spec/workers/activitypub/fetch_all_replies_worker_spec.rb b/spec/workers/activitypub/fetch_all_replies_worker_spec.rb
index c7b107ac81..bd166c4c7f 100644
--- a/spec/workers/activitypub/fetch_all_replies_worker_spec.rb
+++ b/spec/workers/activitypub/fetch_all_replies_worker_spec.rb
@@ -126,11 +126,11 @@ RSpec.describe ActivityPub::FetchAllRepliesWorker do
     all_items.each do |item|
       next if [top_note_uri, reply_note_uri].include? item
 
-      stub_request(:get, item).to_return(status: 200, body: JSON.generate(empty_object), headers: { 'Content-Type': 'application/activity+json' })
+      stub_request(:get, item).to_return(status: 200, body: empty_object.to_json, headers: { 'Content-Type': 'application/activity+json' })
     end
 
-    stub_request(:get, top_note_uri).to_return(status: 200, body: JSON.generate(top_object), headers: { 'Content-Type': 'application/activity+json' })
-    stub_request(:get, reply_note_uri).to_return(status: 200, body: JSON.generate(reply_object), headers: { 'Content-Type': 'application/activity+json' })
+    stub_request(:get, top_note_uri).to_return(status: 200, body: top_object.to_json, headers: { 'Content-Type': 'application/activity+json' })
+    stub_request(:get, reply_note_uri).to_return(status: 200, body: reply_object.to_json, headers: { 'Content-Type': 'application/activity+json' })
   end
 
   shared_examples 'fetches all replies' do
@@ -180,8 +180,8 @@ RSpec.describe ActivityPub::FetchAllRepliesWorker do
       end
 
       before do
-        stub_request(:get, top_collection_uri).to_return(status: 200, body: JSON.generate(replies_top), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, reply_collection_uri).to_return(status: 200, body: JSON.generate(replies_nested), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, top_collection_uri).to_return(status: 200, body: replies_top.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, reply_collection_uri).to_return(status: 200, body: replies_nested.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'fetches all replies'
@@ -254,8 +254,8 @@ RSpec.describe ActivityPub::FetchAllRepliesWorker do
       end
 
       before do
-        stub_request(:get, top_page_2_uri).to_return(status: 200, body: JSON.generate(top_page_two), headers: { 'Content-Type': 'application/activity+json' })
-        stub_request(:get, reply_page_2_uri).to_return(status: 200, body: JSON.generate(reply_page_two), headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, top_page_2_uri).to_return(status: 200, body: top_page_two.to_json, headers: { 'Content-Type': 'application/activity+json' })
+        stub_request(:get, reply_page_2_uri).to_return(status: 200, body: reply_page_two.to_json, headers: { 'Content-Type': 'application/activity+json' })
       end
 
       it_behaves_like 'fetches all replies'
diff --git a/spec/workers/activitypub/fetch_replies_worker_spec.rb b/spec/workers/activitypub/fetch_replies_worker_spec.rb
index 5eea3fcbcf..fd791871a1 100644
--- a/spec/workers/activitypub/fetch_replies_worker_spec.rb
+++ b/spec/workers/activitypub/fetch_replies_worker_spec.rb
@@ -17,7 +17,7 @@ RSpec.describe ActivityPub::FetchRepliesWorker do
     }
   end
 
-  let(:json) { JSON.generate(payload) }
+  let(:json) { payload.to_json }
 
   describe 'perform' do
     it 'performs a request if the collection URI is from the same host' do
diff --git a/spec/workers/activitypub/verify_featured_item_worker_spec.rb b/spec/workers/activitypub/verify_featured_item_worker_spec.rb
index f94313ce1d..bbea044c34 100644
--- a/spec/workers/activitypub/verify_featured_item_worker_spec.rb
+++ b/spec/workers/activitypub/verify_featured_item_worker_spec.rb
@@ -12,13 +12,13 @@ RSpec.describe ActivityPub::VerifyFeaturedItemWorker do
     before { stub_service }
 
     it 'sends the status to the service' do
-      worker.perform(collection_item.id)
+      worker.perform(collection_item.id, 'https://example.com/authorizations/1')
 
-      expect(service).to have_received(:call).with(collection_item)
+      expect(service).to have_received(:call).with(collection_item, 'https://example.com/authorizations/1')
     end
 
     it 'returns nil for non-existent record' do
-      result = worker.perform(123_123_123)
+      result = worker.perform(123_123_123, 'https://example.com/authorizations/1')
 
       expect(result).to be_nil
     end
diff --git a/yarn.lock b/yarn.lock
index f14c322d93..536a2666b8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10715,10 +10715,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"pg-connection-string@npm:^2.11.0, pg-connection-string@npm:^2.6.0":
-  version: 2.11.0
-  resolution: "pg-connection-string@npm:2.11.0"
-  checksum: 10c0/7a4bcf9b4f1e1fee6482e2bd814f544d451240059be6b8a186f24f73f163f1c599bb8c4984c398254869f744f6c3659b83e285c3d525fc640e99c60c453bd0df
+"pg-connection-string@npm:^2.12.0, pg-connection-string@npm:^2.6.0":
+  version: 2.12.0
+  resolution: "pg-connection-string@npm:2.12.0"
+  checksum: 10c0/3a26c62884a9f0464718f652bd5d6bce276ebda830c0fef4de4f88ae73c2507d70cae1d45c2f5b49bebd76187fb4c94f889d07c53fca6acd06b2eecbebcdc336
   languageName: node
   linkType: hard
 
@@ -10729,19 +10729,19 @@ __metadata:
   languageName: node
   linkType: hard
 
-"pg-pool@npm:^3.12.0":
-  version: 3.12.0
-  resolution: "pg-pool@npm:3.12.0"
+"pg-pool@npm:^3.13.0":
+  version: 3.13.0
+  resolution: "pg-pool@npm:3.13.0"
   peerDependencies:
     pg: ">=8.0"
-  checksum: 10c0/b09da392ae2d0dae7bdf62b8557d3643bb7d84335894bc536f16ddd0da116b44c2f2770c88ff71a80252988ca115ec95a480cc047a75df34fbbbb2432b3a75da
+  checksum: 10c0/2756f79cda14e3834356f2ca035deab806bca2172a38a488b62ada54bd3e65d33f583661bbe96da0c0e75e6bc59807ada733c37efca6e24ae2893429936a1549
   languageName: node
   linkType: hard
 
-"pg-protocol@npm:*, pg-protocol@npm:^1.12.0":
-  version: 1.12.0
-  resolution: "pg-protocol@npm:1.12.0"
-  checksum: 10c0/577f33c756f6503682d9ac17fd813f9edbe4a1716e497f17d36b6edaf9bf8383accaf8cd7422c49e2fbe4eb28ef275bc52fbd8287e154d4510f50b9ccefe4165
+"pg-protocol@npm:*, pg-protocol@npm:^1.13.0":
+  version: 1.13.0
+  resolution: "pg-protocol@npm:1.13.0"
+  checksum: 10c0/a4e851e6bb8ff404ca19d561cf49b6b0caf45163bd3f289889edaf6c4e9fb25b08fb57f50d37a8cc86007efcf2cbb3dd2372c97a353a546f45eb49ddebc84fa9
   languageName: node
   linkType: hard
 
@@ -10759,13 +10759,13 @@ __metadata:
   linkType: hard
 
 "pg@npm:^8.5.0":
-  version: 8.19.0
-  resolution: "pg@npm:8.19.0"
+  version: 8.20.0
+  resolution: "pg@npm:8.20.0"
   dependencies:
     pg-cloudflare: "npm:^1.3.0"
-    pg-connection-string: "npm:^2.11.0"
-    pg-pool: "npm:^3.12.0"
-    pg-protocol: "npm:^1.12.0"
+    pg-connection-string: "npm:^2.12.0"
+    pg-pool: "npm:^3.13.0"
+    pg-protocol: "npm:^1.13.0"
     pg-types: "npm:2.2.0"
     pgpass: "npm:1.0.5"
   peerDependencies:
@@ -10776,7 +10776,7 @@ __metadata:
   peerDependenciesMeta:
     pg-native:
       optional: true
-  checksum: 10c0/7713d6ef9f32746370f2bd599ebfa54d22bbdbb3a256a64b76997dd8a7279a5734dde260d6a1da22047171604fba88bd273d570c77b16f08ebe32a47ffbe2aba
+  checksum: 10c0/e21d44b9fb3ec188e67778d7abd32d945a546f2da5128b6c8c16da8ae1e42fdc953c0d6f0a2ee65d11f31808c1dffaf908cb9c880cd2e8f0ae05525e4b8bc832
   languageName: node
   linkType: hard