diff --git a/test/unit/forum_post_test.rb b/test/unit/forum_post_test.rb
index 7d534fa3b..246848eda 100644
--- a/test/unit/forum_post_test.rb
+++ b/test/unit/forum_post_test.rb
@@ -36,7 +36,7 @@ class ForumPostTest < ActiveSupport::TestCase
       should "update the topic's updated_at when deleted" do
         @posts.last.destroy
         @topic.reload
-        assert_equal(@posts[0].updated_at.to_s, @topic.updated_at.to_s)
+        assert_equal(@posts[8].updated_at.to_s, @topic.updated_at.to_s)
       end
     end