1 files changed, 9 insertions, 0 deletions
diff --git a/Library/Formula/md5sha1sum.rb b/Library/Formula/md5sha1sum.rb
index b657d7f15..5975ee4fe 100644
--- a/Library/Formula/md5sha1sum.rb
+++ b/Library/Formula/md5sha1sum.rb
@@ -14,4 +14,13 @@ class Md5sha1sum < Formula
     bin.install_symlink bin/'md5sum' => 'sha1sum'
     bin.install_symlink bin/'md5sum' => 'ripemd160sum'
   end
+
+  test do
+    (testpath/'file.txt').write('This is a test file with a known checksum')
+    (testpath/'file.txt.sha1').write <<-EOS.undent
+      52623d47c33ad3fac30c4ca4775ca760b893b963  file.txt
+    EOS
+    system "#{bin}/sha1sum", '--check', 'file.txt.sha1'
+  end
+
 end