diff --git a/test/test-helper.el b/test/test-helper.el
index 60e224f..9fba3f7 100644
--- a/test/test-helper.el
+++ b/test/test-helper.el
@@ -35,4 +35,6 @@
 (defun load-plantuml-mode ()
   (require 'plantuml-mode (f-expand "plantuml-mode.el" package-code-path)))
 
+(load-plantuml-mode)
+
 ;;; test-helper.el ends here