diff --git a/spec/controllers/ajax/answer_controller_spec.rb b/spec/controllers/ajax/answer_controller_spec.rb
index 18c65354..dd2a1ca6 100644
--- a/spec/controllers/ajax/answer_controller_spec.rb
+++ b/spec/controllers/ajax/answer_controller_spec.rb
@@ -26,6 +26,8 @@ describe Ajax::AnswerController, :ajax_controller, type: :controller do
         end
 
         include_examples "returns the expected response"
+
+        include_examples "touches user timestamp", :inbox_updated_at
       end
 
       shared_examples "does not create the answer" do
diff --git a/spec/controllers/ajax/comment_controller_spec.rb b/spec/controllers/ajax/comment_controller_spec.rb
index 0f4189b8..a93fc126 100644
--- a/spec/controllers/ajax/comment_controller_spec.rb
+++ b/spec/controllers/ajax/comment_controller_spec.rb
@@ -4,6 +4,8 @@
 require "rails_helper"
 
 describe Ajax::CommentController, :ajax_controller, type: :controller do
+  include ActiveSupport::Testing::TimeHelpers
+
   let(:answer) { FactoryBot.create(:answer, user: FactoryBot.create(:user)) }
 
   describe "#create" do
@@ -23,6 +25,19 @@ describe Ajax::CommentController, :ajax_controller, type: :controller do
           expect(answer.reload.comments.ids).to include(Comment.last.id)
         end
 
+        context "a user is subscribed to the answer" do
+          let(:subscribed_user) { FactoryBot.create(:user) }
+
+          it "updates the notification caching timestamp for a subscribed user" do
+            Subscription.subscribe(subscribed_user, answer)
+
+            travel_to(1.day.from_now) do
+              expect { subject }.to change { subscribed_user.reload.notifications_updated_at }.to(DateTime.now)
+            end
+          end
+
+        end
+
         include_examples "returns the expected response"
       end
 
diff --git a/spec/controllers/inbox_controller_spec.rb b/spec/controllers/inbox_controller_spec.rb
index 94a8accf..a6e5917c 100644
--- a/spec/controllers/inbox_controller_spec.rb
+++ b/spec/controllers/inbox_controller_spec.rb
@@ -65,12 +65,7 @@ describe InboxController, type: :controller do
           expect { subject }.to change { inbox_entry.reload.new? }.from(true).to(false)
         end
 
-        it "updates the the timestamp used for caching" do
-          user.update(inbox_updated_at: original_inbox_updated_at)
-          travel 1.second do
-            expect { subject }.to change { user.reload.inbox_updated_at.floor }.from(original_inbox_updated_at.floor).to(Time.now.utc.floor)
-          end
-        end
+        include_examples "touches user timestamp", :inbox_updated_at
 
         context "when requested the turbo stream format" do
           subject { get :show, format: :turbo_stream }
@@ -280,6 +275,8 @@ describe InboxController, type: :controller do
       it "creates an inbox entry" do
         expect { subject }.to(change { user.inboxes.count }.by(1))
       end
+
+      include_examples "touches user timestamp", :inbox_updated_at
     end
   end
 end
diff --git a/spec/controllers/settings/export_controller_spec.rb b/spec/controllers/settings/export_controller_spec.rb
index 0750ed6e..0bc87796 100644
--- a/spec/controllers/settings/export_controller_spec.rb
+++ b/spec/controllers/settings/export_controller_spec.rb
@@ -17,18 +17,20 @@ describe Settings::ExportController, type: :controller do
       end
 
       context "when user has a new DataExported notification" do
-        let(:notification) do
+        let!(:notification) do
           Notification::DataExported.create(
             target_id:   user.id,
             target_type: "User::DataExport",
             recipient:   user,
-            new:         true
+            new:         true,
           )
         end
 
         it "marks the notification as read" do
           expect { subject }.to change { notification.reload.new }.from(true).to(false)
         end
+
+        include_examples "touches user timestamp", :notifications_updated_at
       end
     end
   end
diff --git a/spec/shared_examples/touches_timestamps.rb b/spec/shared_examples/touches_timestamps.rb
new file mode 100644
index 00000000..339a1b95
--- /dev/null
+++ b/spec/shared_examples/touches_timestamps.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+RSpec.shared_examples_for "touches user timestamp" do |timestamp_column|
+  include ActiveSupport::Testing::TimeHelpers
+
+  it "touches #{timestamp_column}" do
+    travel_to(1.day.from_now) do
+      expect { subject }.to change { user.reload.send(timestamp_column) }.to(DateTime.now)
+    end
+  end
+end