diff --git a/railties/lib/rails/generators/test_unit/model/templates/fixtures.yml b/railties/lib/rails/generators/test_unit/model/templates/fixtures.yml
index b2bcaf63be..7625ff975c 100644
--- a/railties/lib/rails/generators/test_unit/model/templates/fixtures.yml
+++ b/railties/lib/rails/generators/test_unit/model/templates/fixtures.yml
@@ -4,13 +4,17 @@
 one:
 <% attributes.each do |attribute| -%>
   <%= attribute.column_name %>: <%= attribute.default %>
-  <%= "#{attribute.name}_type: #{attribute.human_name}" if attribute.polymorphic? %>
+  <%- if attribute.polymorphic? -%>
+  <%= "#{attribute.name}_type: #{attribute.human_name}" %>
+  <%- end -%>
 <% end -%>
 
 two:
 <% attributes.each do |attribute| -%>
   <%= attribute.column_name %>: <%= attribute.default %>
-  <%= "#{attribute.name}_type: #{attribute.human_name}" if attribute.polymorphic? %>
+  <%- if attribute.polymorphic? -%>
+  <%= "#{attribute.name}_type: #{attribute.human_name}" %>
+  <%- end -%>
 <% end -%>
 <% else -%>
 # This model initially had no columns defined.  If you add columns to the
diff --git a/railties/test/generators/model_generator_test.rb b/railties/test/generators/model_generator_test.rb
index 0fbaf0c9bb..70e080a8ab 100644
--- a/railties/test/generators/model_generator_test.rb
+++ b/railties/test/generators/model_generator_test.rb
@@ -275,12 +275,12 @@ class ModelGeneratorTest < Rails::Generators::TestCase
 
   def test_fixtures_use_the_references_ids
     run_generator ["LineItem", "product:references", "cart:belongs_to"]
-    assert_file "test/fixtures/line_items.yml", /product_id: /, /cart_id: /
+    assert_file "test/fixtures/line_items.yml", /product_id: \n  cart_id: /
   end
 
   def test_fixtures_use_the_references_ids_and_type
     run_generator ["LineItem", "product:references{polymorphic}", "cart:belongs_to"]
-    assert_file "test/fixtures/line_items.yml", /product_id: /, /product_type: Product/, /cart_id: /
+    assert_file "test/fixtures/line_items.yml", /product_id: \n  product_type: Product\n  cart_id: /
   end
 
   def test_fixture_is_skipped