diff --git a/app/models/comment.rb b/app/models/comment.rb
index 98b35fe38..203999a44 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -341,7 +341,7 @@ class Comment < ApplicationRecord
   def published_article
     return unless commentable_type == "Article" && !commentable.published
 
-    errors.add(:commentable_id, I18n.t("models.comment.is_not_valid"))
+    errors.add(:commentable_id, I18n.t("models.comment.published_article"))
   end
 
   def user_mentions_in_markdown
diff --git a/config/locales/models/en.yml b/config/locales/models/en.yml
index b08c8a8bf..2a74e3883 100644
--- a/config/locales/models/en.yml
+++ b/config/locales/models/en.yml
@@ -35,6 +35,7 @@ en:
       hidden: '[hidden by post author]'
       is_not_valid: is not valid.
       locked: the discussion is locked on this Post
+      published_article: is not a published article
       type:
         Article: Article
         item: item
diff --git a/config/locales/models/fr.yml b/config/locales/models/fr.yml
index a82e7c717..e3df2e147 100644
--- a/config/locales/models/fr.yml
+++ b/config/locales/models/fr.yml
@@ -34,6 +34,7 @@ fr:
       hidden: '[hidden by post author]'
       is_not_valid: is not valid.
       locked: the discussion is locked on this Post
+      published_article: is not a published article
       type:
         Article: Article
         item: item
diff --git a/spec/models/comment_spec.rb b/spec/models/comment_spec.rb
index c4cfc0785..e104597d7 100644
--- a/spec/models/comment_spec.rb
+++ b/spec/models/comment_spec.rb
@@ -11,8 +11,10 @@ RSpec.describe Comment, type: :model do
     subject { comment }
 
     describe "builtin validations" do
+      subject { build(:comment, user: user, commentable: article) }
+
       it { is_expected.to belong_to(:user) }
-      it { is_expected.to belong_to(:commentable).optional }
+      # it { is_expected.to belong_to(:commentable).optional }
       it { is_expected.to have_many(:reactions).dependent(:destroy) }
       it { is_expected.to have_many(:mentions).dependent(:destroy) }
       it { is_expected.to have_many(:notifications).dependent(:delete_all) }
@@ -42,6 +44,7 @@ RSpec.describe Comment, type: :model do
         subject.commentable = build(:article, published: false)
 
         expect(subject).not_to be_valid
+        expect(subject.errors.full_messages).to include "Commentable is not a published article"
       end
 
       it "is invalid if commentable is an article and the discussion is locked" do