1 files changed, 6 insertions, 0 deletions
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 42614e00cb..ab893dbfd8 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -1457,4 +1457,10 @@ class TestIO < Test::Unit::TestCase
       }
     }
   end
+
+  def test_tainted
+    t = make_tempfile
+    assert(File.read(t.path, 4).tainted?, '[ruby-dev:38826]')
+    assert(File.open(t.path) {|f| f.read(4)}.tainted?, '[ruby-dev:38826]')
+  end
 end