diff --git a/test/plantuml-mode-test.el b/test/plantuml-mode-test.el
index 4c95184..afcff0c 100644
--- a/test/plantuml-mode-test.el
+++ b/test/plantuml-mode-test.el
@@ -12,6 +12,24 @@
   (should (equal (expand-file-name "~/plantuml.jar")
                  plantuml-jar-path)))
 
+(ert-deftest can-unload-plantuml ()
+  (unload-feature 'plantuml-mode t)
+  (should (eq nil (boundp 'plantuml-jar-path)))
+  (load-plantuml-mode)
+  (should (not (eq nil (boundp 'plantuml-jar-path)))))
+
+(ert-deftest debug-install-issues ()
+  (unload-feature 'plantuml-mode t)
+
+  (condition-case nil
+      (require 'package)
+    (add-to-list 'package-archives
+                 '("melpa" . "https://melpa.milkbox.net/packages/"))
+    (package-install "plantuml-mode")
+    (unload-feature 'plantuml-mode t))
+
+  (load-plantuml-mode))
+
 (provide 'plantuml-mode-test)
 
 ;;; plantuml-mode-test.el ends here
diff --git a/test/test-helper.el b/test/test-helper.el
index 6e9026c..9fba3f7 100644
--- a/test/test-helper.el
+++ b/test/test-helper.el
@@ -32,6 +32,9 @@
 (defun read-test-file (path)
   (f-read (f-join plantuml-test-resources-path path) 'utf-8))
 
-(require 'plantuml-mode (f-expand "plantuml-mode.el" package-code-path))
+(defun load-plantuml-mode ()
+  (require 'plantuml-mode (f-expand "plantuml-mode.el" package-code-path)))
+
+(load-plantuml-mode)
 
 ;;; test-helper.el ends here