diff --git a/app/models/card/readable.rb b/app/models/card/readable.rb
index 2511a6b45..652bb2fce 100644
--- a/app/models/card/readable.rb
+++ b/app/models/card/readable.rb
@@ -13,7 +13,19 @@ module Card::Readable
     end
 
     def notification_sources
-      events + mentions + comment_mentions
+      event_notification_sources + mention_notification_sources
+    end
+
+    def event_notification_sources
+      events + comment_creation_events
+    end
+
+    def mention_notification_sources
+      mentions + comment_mentions
+    end
+
+    def comment_creation_events
+      Event.where(eventable: comments)
     end
 
     def comment_mentions
@@ -21,6 +33,6 @@ module Card::Readable
     end
 
     def comments
-      Comment.where(id: messages.comments.pluck(:messageable_id))
+      @comments ||= Comment.where(id: messages.comments.pluck(:messageable_id))
     end
 end
diff --git a/test/models/card/readable_test.rb b/test/models/card/readable_test.rb
index b60d98a09..c53d3f44d 100644
--- a/test/models/card/readable_test.rb
+++ b/test/models/card/readable_test.rb
@@ -20,4 +20,10 @@ class Card::ReadableTest < ActiveSupport::TestCase
       cards(:logo).read_by(users(:david))
     end
   end
+
+  test "read clears notifications from the comments" do
+    assert_changes -> { notifications(:layout_commented_kevin).reload.read? }, from: false, to: true do
+      cards(:layout).read_by(users(:kevin))
+    end
+  end
 end