diff --git a/Formula/tree.rb b/Formula/tree.rb
index 779d76a553..bfb585f25c 100644
--- a/Formula/tree.rb
+++ b/Formula/tree.rb
@@ -17,4 +17,8 @@ class Tree < Formula
                    "OBJS=#{objs}",
                    "install"
   end
+
+  test do
+    system "#{bin}/tree", prefix
+  end
 end