diff --git a/spec/controllers/work_packages_controller_spec.rb b/spec/controllers/work_packages_controller_spec.rb
index 0ff6a00efe..afc3717c9d 100644
--- a/spec/controllers/work_packages_controller_spec.rb
+++ b/spec/controllers/work_packages_controller_spec.rb
@@ -345,7 +345,7 @@ describe WorkPackagesController do
         it 'should attach attachments if those are provided' do
           params[:attachments] = 'attachment-blubs-data'
 
-          Attachment.should_receive(:attach_files).with(stub_work_package, params[:attachments])
+          stub_work_package.should_receive(:attach_files).with(params[:attachments])
           controller.stub(:render_attachment_warning_if_needed)
 
           call_action