diff --git a/railties/test/generators/generated_attribute_test.rb b/railties/test/generators/generated_attribute_test.rb
index de7e4de2a68df..272e179fe37b3 100644
--- a/railties/test/generators/generated_attribute_test.rb
+++ b/railties/test/generators/generated_attribute_test.rb
@@ -108,4 +108,16 @@ def test_reference_is_false
       )
     end
   end
+
+  def test_nil_type_raises_exception
+    assert_raise Thor::Error do
+      create_generated_attribute(nil, 'title')
+    end
+  end
+
+  def test_missing_type_raises_exception
+    assert_raise Thor::Error do
+      create_generated_attribute(:'', 'title')
+    end
+  end
 end