diff --git a/app/controllers/api/v2_alpha/notifications_controller.rb b/app/controllers/api/v2_alpha/notifications_controller.rb
index 83d40a0886..945d600e3d 100644
--- a/app/controllers/api/v2_alpha/notifications_controller.rb
+++ b/app/controllers/api/v2_alpha/notifications_controller.rb
@@ -31,13 +31,15 @@ class Api::V2Alpha::NotificationsController < Api::BaseController
         'app.notification_grouping.status.unique_count' => statuses.uniq.size
       )
 
-      render json: @grouped_notifications, each_serializer: REST::NotificationGroupSerializer, relationships: @relationships, group_metadata: @group_metadata
+      presenter = GroupedNotificationsPresenter.new(@grouped_notifications)
+      render json: presenter, serializer: REST::DedupNotificationGroupSerializer, relationships: @relationships, group_metadata: @group_metadata
     end
   end
 
   def show
     @notification = current_account.notifications.without_suspended.find_by!(group_key: params[:id])
-    render json: NotificationGroup.from_notification(@notification), serializer: REST::NotificationGroupSerializer
+    presenter = GroupedNotificationsPresenter.new([NotificationGroup.from_notification(@notification)])
+    render json: presenter, serializer: REST::DedupNotificationGroupSerializer
   end
 
   def clear
diff --git a/app/serializers/rest/notification_group_serializer.rb b/app/serializers/rest/notification_group_serializer.rb
deleted file mode 100644
index 749f717754..0000000000
--- a/app/serializers/rest/notification_group_serializer.rb
+++ /dev/null
@@ -1,51 +0,0 @@
-# frozen_string_literal: true
-
-class REST::NotificationGroupSerializer < ActiveModel::Serializer
-  # Please update app/javascript/api_types/notification.ts when making changes to the attributes
-  attributes :group_key, :notifications_count, :type, :most_recent_notification_id
-
-  attribute :page_min_id, if: :paginated?
-  attribute :page_max_id, if: :paginated?
-  attribute :latest_page_notification_at, if: :paginated?
-
-  has_many :sample_accounts, serializer: REST::AccountSerializer
-  belongs_to :target_status, key: :status, if: :status_type?, serializer: REST::StatusSerializer
-  belongs_to :report, if: :report_type?, serializer: REST::ReportSerializer
-  belongs_to :account_relationship_severance_event, key: :event, if: :relationship_severance_event?, serializer: REST::AccountRelationshipSeveranceEventSerializer
-  belongs_to :account_warning, key: :moderation_warning, if: :moderation_warning_event?, serializer: REST::AccountWarningSerializer
-
-  def status_type?
-    [:favourite, :reblog, :status, :mention, :poll, :update].include?(object.type)
-  end
-
-  def report_type?
-    object.type == :'admin.report'
-  end
-
-  def relationship_severance_event?
-    object.type == :severed_relationships
-  end
-
-  def moderation_warning_event?
-    object.type == :moderation_warning
-  end
-
-  def page_min_id
-    range = instance_options[:group_metadata][object.group_key]
-    range.present? ? range[:min_id].to_s : object.notification.id.to_s
-  end
-
-  def page_max_id
-    range = instance_options[:group_metadata][object.group_key]
-    range.present? ? range[:max_id].to_s : object.notification.id.to_s
-  end
-
-  def latest_page_notification_at
-    range = instance_options[:group_metadata][object.group_key]
-    range.present? ? range[:latest_notification_at] : object.notification.created_at
-  end
-
-  def paginated?
-    !instance_options[:group_metadata].nil?
-  end
-end
diff --git a/spec/requests/api/v2_alpha/notifications_spec.rb b/spec/requests/api/v2_alpha/notifications_spec.rb
index 104651ebe3..20c94fa9c4 100644
--- a/spec/requests/api/v2_alpha/notifications_spec.rb
+++ b/spec/requests/api/v2_alpha/notifications_spec.rb
@@ -58,7 +58,7 @@ RSpec.describe 'Notifications' do
 
         expect(response).to have_http_status(200)
         expect(body_json_types.uniq).to eq ['mention']
-        expect(body_as_json[0][:page_min_id]).to_not be_nil
+        expect(body_as_json.dig(:notification_groups, 0, :page_min_id)).to_not be_nil
       end
     end
 
@@ -84,7 +84,7 @@ RSpec.describe 'Notifications' do
     end
 
     def body_json_types
-      body_as_json.pluck(:type)
+      body_as_json[:notification_groups].pluck(:type)
     end
   end