diff --git a/Library/Homebrew/unittest.rb b/Library/Homebrew/unittest.rb
index bdf3835336..1736a6fa91 100755
--- a/Library/Homebrew/unittest.rb
+++ b/Library/Homebrew/unittest.rb
@@ -35,13 +35,21 @@ class TestBall <Formula
     @url="file:///#{Pathname.new(__FILE__).parent.realpath}/testball-0.1.tbz"
     super "testball"
   end
-
   def install
     prefix.install "bin"
     prefix.install "libexec"
   end
 end
 
+class TestZip <Formula
+  def initialize
+    path=HOMEBREW_CACHE.parent+'test-0.1.zip'
+    Kernel.system 'zip', '-0', path, __FILE__
+    @url="file://#{path}"
+    super 'testzip'
+  end
+end
+
 class TestBallValidMd5 <TestBall
   @md5='71aa838a9e4050d1876a295a9e62cbe6'
 end
@@ -261,6 +269,10 @@ class BeerTasting <Test::Unit::TestCase
     nostdout { assert_raises(ExecutionError) { f.brew } }
   end
 
+  def test_zip
+    nostdout { assert_nothing_raised { TestZip.new.brew {} } }
+  end
+
   def test_no_ARGV_dupes
     ARGV.unshift'foo'
     ARGV.unshift'foo'