1 files changed, 6 insertions, 0 deletions
diff --git a/Library/Formula/chicken.rb b/Library/Formula/chicken.rb
index 816d49a64..cbd91d28d 100644
--- a/Library/Formula/chicken.rb
+++ b/Library/Formula/chicken.rb
@@ -15,4 +15,10 @@ class Chicken < Formula
     system "make", *args
     system "make", "install", *args
   end
+
+  test do
+    output = `'#{bin}/csi' -e '(print (* 5 5))'`
+    assert_equal "25", output.strip
+    assert $?.success?
+  end
 end