correct for earlier versions of ruby

spec/services/post_owner_changer_spec.rb

@@ -22,10 +22,12 @@ describe PostOwnerChanger do
     it "changes the user" do
       bumped_at = topic.bumped_at
 
+      freeze_time 2.days.from_now
+
       old_user = p1.user
       PostOwnerChanger.new(post_ids: [p1.id], topic_id: topic.id, new_owner: user_a, acting_user: editor).change_owner!
       p1.reload
-      expect(p1.topic.bumped_at).to eq(bumped_at)
+      expect(p1.topic.bumped_at).to be_within(1.second).of (bumped_at)
       expect(p1.topic.last_post_user_id).to eq(user_a.id)
       expect(old_user).not_to eq(p1.user)
       expect(p1.user).to eq(user_a)