1 files changed, 4 insertions, 0 deletions
diff --git a/Library/Formula/plotutils.rb b/Library/Formula/plotutils.rb
index 6b443c1d0..9834b52b9 100644
--- a/Library/Formula/plotutils.rb
+++ b/Library/Formula/plotutils.rb
@@ -22,4 +22,8 @@ class Plotutils < Formula
     system "make"
     system "make", "install"
   end
+
+  test do
+    assert pipe_output("#{bin}/graph -T ps", "0.0 0.0\n1.0 0.2\n").start_with?("")
+  end
 end