diff --git a/spec/models/comment_spec.rb b/spec/models/comment_spec.rb
index e1f39ea0d..09e6a9900 100644
--- a/spec/models/comment_spec.rb
+++ b/spec/models/comment_spec.rb
@@ -5,7 +5,8 @@ describe Comment do
   let(:comment) { build(:comment) }
 
   it_behaves_like "public_voters_stats"
-  
+  it_behaves_like "has_public_author"
+
   it "is valid" do
     expect(comment).to be_valid
   end
diff --git a/spec/models/concerns/has_public_author_spec.rb b/spec/models/concerns/has_public_author_spec.rb
new file mode 100644
index 000000000..a5a9c2811
--- /dev/null
+++ b/spec/models/concerns/has_public_author_spec.rb
@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+shared_examples_for 'has_public_author' do
+  let(:model) { described_class }
+
+  describe 'public_author' do
+    it "returns author if author's activity is public" do
+      author = create(:user, public_activity: true)
+      authored_element = create(model.to_s.underscore.to_sym, author: author)
+
+      expect(authored_element.public_author).to eq(author)
+    end
+
+    it "returns nil if author's activity is private" do
+      author = create(:user, public_activity: false)
+      authored_element = create(model.to_s.underscore.to_sym, author: author)
+
+      expect(authored_element.public_author).to be_nil
+    end
+  end
+end
diff --git a/spec/models/debate_spec.rb b/spec/models/debate_spec.rb
index 7c40e63fe..4db0e5f0a 100644
--- a/spec/models/debate_spec.rb
+++ b/spec/models/debate_spec.rb
@@ -5,7 +5,8 @@ describe Debate do
   let(:debate) { build(:debate) }
 
   it_behaves_like "public_voters_stats"
-  
+  it_behaves_like "has_public_author"
+
   it "should be valid" do
     expect(debate).to be_valid
   end
diff --git a/spec/models/proposal_spec.rb b/spec/models/proposal_spec.rb
index 77eb3e358..08ed6b384 100644
--- a/spec/models/proposal_spec.rb
+++ b/spec/models/proposal_spec.rb
@@ -5,6 +5,7 @@ describe Proposal do
   let(:proposal) { build(:proposal) }
 
   it_behaves_like "public_voters_stats"
+  it_behaves_like "has_public_author"
 
   it "should be valid" do
     expect(proposal).to be_valid