1 files changed, 18 insertions, 0 deletions
diff --git a/test/syck/test_class.rb b/test/syck/test_class.rb
new file mode 100644
index 0000000000..803a1f14b4
--- /dev/null
+++ b/test/syck/test_class.rb
@@ -0,0 +1,18 @@
+require 'test/unit'
+require 'yaml'
+
+module Syck
+  class TestClass < Test::Unit::TestCase
+    def test_to_yaml
+      assert_raises(::TypeError) do
+        TestClass.to_yaml
+      end
+    end
+
+    def test_dump
+      assert_raises(::TypeError) do
+        YAML.dump TestClass
+      end
+    end
+  end
+end