diff --git a/railties/test/generators/namespaced_generators_test.rb b/railties/test/generators/namespaced_generators_test.rb
index abafcefde5..6f00fc5d26 100644
--- a/railties/test/generators/namespaced_generators_test.rb
+++ b/railties/test/generators/namespaced_generators_test.rb
@@ -64,9 +64,10 @@ class NamespacedControllerGeneratorTest < NamespacedGeneratorTestCase
 
   def test_namespaced_controller_dont_indent_blank_lines
     run_generator
-    assert_file "app/controllers/test_app/account_controller.rb"
-    File.readlines(File.expand_path("app/controllers/test_app/account_controller.rb", destination_root)).each do |line|
-      assert_no_match line.chomp, /^\s+$/, "Don't indent blank lines"
+    assert_file "app/controllers/test_app/account_controller.rb" do |content|
+      content.split("\n").each do |line|
+        assert_no_match line, /^\s+$/, "Don't indent blank lines"
+      end
     end
   end
 end