diff --git a/lack-component.asd b/lack-component.asd
index 989229d..2bc6fe2 100644
--- a/lack-component.asd
+++ b/lack-component.asd
@@ -7,4 +7,5 @@
   :version "0.1"
   :author "Eitaro Fukamachi"
   :license "LLGPL"
-  :components ((:file "src/component")))
+  :components ((:file "src/component"))
+  :in-order-to ((test-op (test-op t-lack-component))))
diff --git a/t-lack-component.asd b/t-lack-component.asd
new file mode 100644
index 0000000..3976289
--- /dev/null
+++ b/t-lack-component.asd
@@ -0,0 +1,17 @@
+(in-package :cl-user)
+(defpackage t-lack-component-asd
+  (:use :cl :asdf))
+(in-package :t-lack-component-asd)
+
+(defsystem t-lack-component
+  :author "Eitaro Fukamachi"
+  :license "LLGPL"
+  :depends-on (:lack-component
+               :lack-test
+               :prove)
+  :components
+  ((:test-file "t/component"))
+
+  :defsystem-depends-on (:prove-asdf)
+  :perform (test-op :after (op c)
+                    (funcall (intern #.(string :run-test-system) :prove) c)))
diff --git a/t/component.lisp b/t/component.lisp
new file mode 100644
index 0000000..a000e34
--- /dev/null
+++ b/t/component.lisp
@@ -0,0 +1,31 @@
+(in-package :cl-user)
+(defpackage t.lack.component
+  (:use :cl
+        :lack.component
+        :lack.test
+        :prove))
+(in-package :t.lack.component)
+
+(plan 4)
+
+(defclass myapp (lack-component) ())
+(defmethod call ((comp myapp) env)
+  (declare (ignore env))
+  '(200
+    (:content-type "text/plain")
+    ("ok from myapp")))
+
+(defvar *fn-app*
+  (lambda (env)
+    `(200 (:content-type "text/plain") ("ok" ,(getf env :path-info)))))
+
+(is (call *fn-app* (generate-env "/hello"))
+    '(200 (:content-type "text/plain") ("ok" "/hello")))
+
+(is (call (make-instance 'myapp) (generate-env "/"))
+    '(200 (:content-type "text/plain") ("ok from myapp")))
+
+(is-type (to-app *fn-app*) 'function)
+(is-type (to-app (make-instance 'myapp)) 'function)
+
+(finalize)