Fix test

test/models/filter_test.rb

@@ -56,7 +56,7 @@ class FilterTest < ActiveSupport::TestCase
     assert_changes "filter.reload.updated_at" do
       tags(:mobile).destroy!
     end
-    assert_nil filter.reload.as_params["tag_ids"]
+    assert_nil Filter.find(filter.id).as_params["tag_ids"] # can't reload because as_params is memoized
 
     assert_changes "Filter.exists?(filter.id)" do
       buckets(:writebook).destroy!