diff --git a/railties/test/generators/model_generator_test.rb b/railties/test/generators/model_generator_test.rb
index ef415a4fed45a..f4a9a152c9fea 100644
--- a/railties/test/generators/model_generator_test.rb
+++ b/railties/test/generators/model_generator_test.rb
@@ -11,6 +11,12 @@ def test_help_shows_invoked_generators_options
     assert_match /TestUnit options:/, content
   end
 
+  def test_model_with_missing_attribute_type
+    content = capture(:stderr) { run_generator ["post", "title:string", "body"] }
+    assert_match /Missing type for attribute 'body'/, content
+    assert_match /Example: 'body:string' where string is the type/, content
+  end
+
   def test_invokes_default_orm
     run_generator
     assert_file "app/models/account.rb", /class Account < ActiveRecord::Base/
diff --git a/railties/test/generators/scaffold_generator_test.rb b/railties/test/generators/scaffold_generator_test.rb
index f12445ae35880..446bed3269877 100644
--- a/railties/test/generators/scaffold_generator_test.rb
+++ b/railties/test/generators/scaffold_generator_test.rb
@@ -231,4 +231,10 @@ def test_scaffold_generator_on_revoke_does_not_mutilate_legacy_map_parameter
 
     assert_file "config/routes.rb", /\.routes\.draw do\s*\|map\|\s*$/
   end
+
+  def test_scaffold_generator_outputs_error_message_on_missing_attribute_type
+    content = capture(:stderr) { run_generator ["post", "title:string", "body"]}
+    assert_match /Missing type for attribute 'body'/, content
+    assert_match /Example: 'body:string' where string is the type/, content
+  end
 end