diff --git a/test/unit/comment_test.rb b/test/unit/comment_test.rb
index 4a46c4c..cbcd09f 100644
--- a/test/unit/comment_test.rb
+++ b/test/unit/comment_test.rb
@@ -398,6 +398,9 @@ class CommentTest < ActiveSupport::TestCase
   end
 
   should 'update article activity when add a comment' do
+    now = Time.now
+    Time.stubs(:now).returns(now)
+
     profile = create_user('testuser').person
     article = create(TinyMceArticle, :profile => profile)
 
--
libgit2 0.21.2