Merge pull request #17029 from grk/fix-loading-fixtures-in-engine-tests

Fix loading fixtures in engine tests

railties/lib/rails/generators/rails/plugin/templates/test/test_helper.rb

@@ -13,6 +13,6 @@
 Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each { |f| require f }
 
 # Load fixtures from the engine
-if ActiveSupport::TestCase.method_defined?(:fixture_path=)
+if ActiveSupport::TestCase.respond_to?(:fixture_path=)
   ActiveSupport::TestCase.fixture_path = File.expand_path("../fixtures", __FILE__)
 end