Tests were failing due to Schema cache not being cleared on reset_column_information

test/unit/model_test.rb

@@ -353,6 +353,7 @@ class HasPaperTrailModelTest < ActiveSupport::TestCase
     context "after a column is removed from the record's schema" do
       setup do
         change_schema
+        Widget.connection.schema_cache.clear!
         Widget.reset_column_information
         assert_raise(NoMethodError) { Widget.new.sacrificial_column }
         @last = @widget.versions.last

test/unit/timestamp_test.rb

@@ -5,6 +5,7 @@ class TimestampTest < ActiveSupport::TestCase
   setup do
     PaperTrail.timestamp_field = :custom_created_at
     change_schema
+    Version.connection.schema_cache.clear!
     Version.reset_column_information
 
     Fluxor.instance_eval <<-END