diff --git a/app/models/concerns/user/activity.rb b/app/models/concerns/user/activity.rb
new file mode 100644
index 00000000000..df2713415b3
--- /dev/null
+++ b/app/models/concerns/user/activity.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module User::Activity
+  extend ActiveSupport::Concern
+
+  # The home and list feeds will be stored for this amount of time, and status
+  # fan-out to followers will include only people active within this time frame.
+  #
+  # Lowering the duration may improve performance if many people sign up, but
+  # most will not check their feed every day. Raising the duration reduces the
+  # amount of background processing that happens when people become active.
+  ACTIVE_DURATION = ENV.fetch('USER_ACTIVE_DAYS', 7).to_i.days
+
+  included do
+    scope :signed_in_recently, -> { where(current_sign_in_at: ACTIVE_DURATION.ago..) }
+    scope :not_signed_in_recently, -> { where(current_sign_in_at: ...ACTIVE_DURATION.ago) }
+  end
+
+  def signed_in_recently?
+    current_sign_in_at.present? && current_sign_in_at >= ACTIVE_DURATION.ago
+  end
+
+  private
+
+  def inactive_since_duration?
+    last_sign_in_at < ACTIVE_DURATION.ago
+  end
+end
diff --git a/app/models/user.rb b/app/models/user.rb
index 669b51c0698..7da5876af19 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -58,21 +58,13 @@ class User < ApplicationRecord
 
   include LanguagesHelper
   include Redisable
+  include User::Activity
   include User::Confirmation
   include User::HasSettings
   include User::LdapAuthenticable
   include User::Omniauthable
   include User::PamAuthenticable
 
-  # The home and list feeds will be stored in Redis for this amount
-  # of time, and status fan-out to followers will include only people
-  # within this time frame. Lowering the duration may improve performance
-  # if lots of people sign up, but not a lot of them check their feed
-  # every day. Raising the duration reduces the amount of expensive
-  # RegenerationWorker jobs that need to be run when those people come
-  # to check their feed
-  ACTIVE_DURATION = ENV.fetch('USER_ACTIVE_DAYS', 7).to_i.days.freeze
-
   devise :two_factor_authenticatable,
          otp_secret_length: 32
 
@@ -122,8 +114,6 @@ class User < ApplicationRecord
   scope :enabled, -> { where(disabled: false) }
   scope :disabled, -> { where(disabled: true) }
   scope :active, -> { confirmed.signed_in_recently.account_not_suspended }
-  scope :signed_in_recently, -> { where(current_sign_in_at: ACTIVE_DURATION.ago..) }
-  scope :not_signed_in_recently, -> { where(current_sign_in_at: ...ACTIVE_DURATION.ago) }
   scope :matches_email, ->(value) { where(arel_table[:email].matches("#{value}%")) }
   scope :matches_ip, ->(value) { left_joins(:ips).merge(IpBlock.contained_by(value)).group(users: [:id]) }
 
@@ -179,10 +169,6 @@ class User < ApplicationRecord
     end
   end
 
-  def signed_in_recently?
-    current_sign_in_at.present? && current_sign_in_at >= ACTIVE_DURATION.ago
-  end
-
   def invited?
     invite_id.present?
   end
@@ -511,7 +497,7 @@ class User < ApplicationRecord
     return unless confirmed?
 
     ActivityTracker.record('activity:logins', id)
-    regenerate_feed! if needs_feed_update?
+    regenerate_feed! if inactive_since_duration?
   end
 
   def notify_staff_about_pending_account!
@@ -530,10 +516,6 @@ class User < ApplicationRecord
     RegenerationWorker.perform_async(account_id)
   end
 
-  def needs_feed_update?
-    last_sign_in_at < ACTIVE_DURATION.ago
-  end
-
   def validate_email_dns?
     email_changed? && !external? && !self.class.skip_mx_check?
   end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 438937b1001..32c9b7f9f8f 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -10,6 +10,7 @@ RSpec.describe User do
   let(:account) { Fabricate(:account, username: 'alice') }
 
   it_behaves_like 'two_factor_backupable'
+  it_behaves_like 'User::Activity'
   it_behaves_like 'User::Confirmation'
 
   describe 'otp_secret' do
@@ -66,26 +67,6 @@ RSpec.describe User do
       end
     end
 
-    describe 'signed_in_recently' do
-      it 'returns a relation of users who have signed in during the recent period' do
-        recent_sign_in_user = Fabricate(:user, current_sign_in_at: within_duration_window_days.ago)
-        Fabricate(:user, current_sign_in_at: exceed_duration_window_days.ago)
-
-        expect(described_class.signed_in_recently)
-          .to contain_exactly(recent_sign_in_user)
-      end
-    end
-
-    describe 'not_signed_in_recently' do
-      it 'returns a relation of users who have not signed in during the recent period' do
-        no_recent_sign_in_user = Fabricate(:user, current_sign_in_at: exceed_duration_window_days.ago)
-        Fabricate(:user, current_sign_in_at: within_duration_window_days.ago)
-
-        expect(described_class.not_signed_in_recently)
-          .to contain_exactly(no_recent_sign_in_user)
-      end
-    end
-
     describe 'account_not_suspended' do
       it 'returns with linked accounts that are not suspended' do
         suspended_account = Fabricate(:account, suspended_at: 10.days.ago)
@@ -120,14 +101,6 @@ RSpec.describe User do
         expect(described_class.matches_ip('2160:2160::/32')).to contain_exactly(user1)
       end
     end
-
-    def exceed_duration_window_days
-      described_class::ACTIVE_DURATION + 2.days
-    end
-
-    def within_duration_window_days
-      described_class::ACTIVE_DURATION - 2.days
-    end
   end
 
   describe 'email domains denylist integration' do
diff --git a/spec/support/examples/models/concerns/user/activity.rb b/spec/support/examples/models/concerns/user/activity.rb
new file mode 100644
index 00000000000..7e647b694a9
--- /dev/null
+++ b/spec/support/examples/models/concerns/user/activity.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.shared_examples 'User::Activity' do
+  before { stub_const 'User::ACTIVE_DURATION', 7.days }
+
+  describe 'Scopes' do
+    let!(:recent_sign_in_user) { Fabricate(:user, current_sign_in_at: 2.days.ago) }
+    let!(:no_recent_sign_in_user) { Fabricate(:user, current_sign_in_at: 10.days.ago) }
+
+    describe '.signed_in_recently' do
+      it 'returns users who have signed in during the recent period' do
+        expect(described_class.signed_in_recently)
+          .to contain_exactly(recent_sign_in_user)
+      end
+    end
+
+    describe '.not_signed_in_recently' do
+      it 'returns users who have not signed in during the recent period' do
+        expect(described_class.not_signed_in_recently)
+          .to contain_exactly(no_recent_sign_in_user)
+      end
+    end
+  end
+
+  describe '#signed_in_recently?' do
+    subject { Fabricate.build :user, current_sign_in_at: }
+
+    context 'when current_sign_in_at is nil' do
+      let(:current_sign_in_at) { nil }
+
+      it { is_expected.to_not be_signed_in_recently }
+    end
+
+    context 'when current_sign_in_at is before the threshold' do
+      let(:current_sign_in_at) { 10.days.ago }
+
+      it { is_expected.to_not be_signed_in_recently }
+    end
+
+    context 'when current_sign_in_at is after the threshold' do
+      let(:current_sign_in_at) { 2.days.ago }
+
+      it { is_expected.to be_signed_in_recently }
+    end
+  end
+end