2 files changed, 15 insertions, 0 deletions
diff --git a/activemodel/test/cases/attribute_methods_test.rb b/activemodel/test/cases/attribute_methods_test.rb
index 0c6e49bee2..9406328d3e 100644
--- a/activemodel/test/cases/attribute_methods_test.rb
+++ b/activemodel/test/cases/attribute_methods_test.rb
@@ -76,7 +76,15 @@ private
   end
 end
 
+class ModelWithoutAttributesMethod
+  include ActiveModel::AttributeMethods
+end
+
 class AttributeMethodsTest < ActiveModel::TestCase
+  test 'method missing works correctly even if attributes method is not defined' do
+    assert_raises(NoMethodError) { ModelWithoutAttributesMethod.new.foo }
+  end
+
   test 'unrelated classes should not share attribute method matchers' do
     assert_not_equal ModelWithAttributes.send(:attribute_method_matchers),
                      ModelWithAttributes2.send(:attribute_method_matchers)
diff --git a/activemodel/test/cases/errors_test.rb b/activemodel/test/cases/errors_test.rb
index 8ddedb160a..4edeece3e8 100644
--- a/activemodel/test/cases/errors_test.rb
+++ b/activemodel/test/cases/errors_test.rb
@@ -27,6 +27,13 @@ class ErrorsTest < ActiveModel::TestCase
     end
   end
 
+  def test_delete
+    errors = ActiveModel::Errors.new(self)
+    errors[:foo] = 'omg'
+    errors.delete(:foo)
+    assert_empty errors[:foo]
+  end
+
   def test_include?
     errors = ActiveModel::Errors.new(self)
     errors[:foo] = 'omg'