1 files changed, 15 insertions, 1 deletions
diff --git a/activerecord/test/cases/persistence_test.rb b/activerecord/test/cases/persistence_test.rb
index 31686bde3f..b2e59e3970 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -744,9 +744,10 @@ class PersistenceTest < ActiveRecord::TestCase
     assert !topic.approved?
     assert_equal "The First Topic", topic.title
 
-    assert_raise(ActiveRecord::RecordNotUnique, ActiveRecord::StatementInvalid) do
+    error = assert_raise(ActiveRecord::RecordNotUnique, ActiveRecord::StatementInvalid) do
       topic.update_attributes(id: 3, title: "Hm is it possible?")
     end
+    assert_not_nil error.cause
     assert_not_equal "Hm is it possible?", Topic.find(3).title
 
     topic.update_attributes(id: 1234)
@@ -965,4 +966,17 @@ class PersistenceTest < ActiveRecord::TestCase
       widget.reset_column_information
     end
   end
+
+  def test_reset_column_information_resets_children
+    child = Class.new(Topic)
+    child.new # force schema to load
+
+    ActiveRecord::Base.connection.add_column(:topics, :foo, :string)
+    Topic.reset_column_information
+
+    assert_equal "bar", child.new(foo: :bar).foo
+  ensure
+    ActiveRecord::Base.connection.remove_column(:topics, :foo)
+    Topic.reset_column_information
+  end
 end