already initialized constant

.github/workflows/rubyonrails.yml

@@ -160,8 +160,8 @@ jobs:
           litmus http://localhost:3000/dmsf/webdav/dmsf_test_project admin admin
           kill `cat tmp/pids/server.pid`
           bundle exec rake redmine:dmsf_webdav_test_off
-        env:
-          TESTS: "basic copymove props"
+        #env:
+        #  TESTS: "basic copymove props"
       - name: Cleanup
         # Rollback plugin's changes to the database
         # Stop the database engine

lib/redmine_dmsf/webdav/base_resource.rb

@@ -30,7 +30,6 @@ module RedmineDmsf
 
       attr_reader :public_path
 
-      unless const_defined?(DIR_FILE)
       DIR_FILE = %(
                     <tr>
                       <td class=\"name\"><a href=\"%s\">%s</a></td>
@@ -39,7 +38,6 @@ module RedmineDmsf
                       <td class=\"mtime\">%s</td>
                     </tr>
                    )
-      end
 
       def initialize(path, request, response, options)
         raise NotFound if Setting.plugin_redmine_dmsf['dmsf_webdav'].blank?