Deal with Ruby 2.5 and Ruby 2.6 in a different way

railties/test/generators/actions_test.rb

@@ -573,9 +573,15 @@ def test_log_with_status_with_quiet
   end
 
   private
+  if RUBY_VERSION < "2.7"
+    def action(*args, &block)
+      capture(:stdout) { generator.send(*args, &block) }
+    end
+  else
     def action(*args, **kwargs, &block)
       capture(:stdout) { generator.send(*args, **kwargs, &block) }
     end
+  end
 
     def assert_runs(commands, config = {}, &block)
       config_matcher = ->(actual_config) do