diff --git a/test/unit/lib/redmine/plugin_test.rb b/test/unit/lib/redmine/plugin_test.rb
index 9cfd7e7da..d27668247 100644
--- a/test/unit/lib/redmine/plugin_test.rb
+++ b/test/unit/lib/redmine/plugin_test.rb
@@ -27,8 +27,6 @@ class Redmine::PluginTest < ActiveSupport::TestCase
     # In case some real plugins are installed
     @klass.clear
 
-    # Change plugin loader's directory for testing
-    Redmine::PluginLoader.directory = @klass.directory
     Redmine::PluginLoader.setup
   end