diff --git a/app/models/user.rb b/app/models/user.rb
index 5a02462482eb0d6e3369b1da4c1eea0d7084cd3f..752a399b99a2a493543dc6182ff8b51c55ac016a 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -257,7 +257,7 @@ def update_tracked_fields!(request)
   has_many :pipeline_schedules,       foreign_key: :owner_id, class_name: 'Ci::PipelineSchedule'
   has_many :todos,                    dependent: :delete_all # rubocop:disable Cop/ActiveRecordDependent -- legacy behavior
   has_many :authored_todos, class_name: 'Todo', dependent: :destroy, foreign_key: :author_id # rubocop:disable Cop/ActiveRecordDependent
-  has_many :notification_settings
+  has_many :notification_settings, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
   has_many :award_emoji, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
   has_many :triggers, -> { Feature.enabled?(:trigger_token_expiration) ? not_expired : self }, class_name: 'Ci::Trigger', foreign_key: :owner_id
   has_many :audit_events, foreign_key: :author_id, inverse_of: :user
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 26a9bd348f7963f4313a942ebf4deeedf3ce079e..7db1674aef94265c4b1d5aa13a9fa323e9fb18b9 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -242,6 +242,7 @@
     it { is_expected.to have_many(:events).dependent(:delete_all) }
     it { is_expected.to have_many(:issues).dependent(:destroy) }
     it { is_expected.to have_many(:notes).dependent(:destroy) }
+    it { is_expected.to have_many(:notification_settings).dependent(:destroy) }
     it { is_expected.to have_many(:merge_requests).dependent(:destroy) }
     it { is_expected.to have_many(:identities).dependent(:destroy) }
     it { is_expected.to have_many(:spam_logs).dependent(:destroy) }
diff --git a/spec/support/shared_examples/models/user_shared_examples.rb b/spec/support/shared_examples/models/user_shared_examples.rb
index f0cdab91954d2cf7c140bf1288b4bb6bf918dd26..88be331cd3563bc2c3583ab6c142fd88298eff0b 100644
--- a/spec/support/shared_examples/models/user_shared_examples.rb
+++ b/spec/support/shared_examples/models/user_shared_examples.rb
@@ -31,7 +31,6 @@
       builds
       pipelines
       pipeline_schedules
-      notification_settings
       triggers
       audit_events
       uploaded_uploads