1 files changed, 10 insertions, 0 deletions
diff --git a/test/psych/test_deprecated.rb b/test/psych/test_deprecated.rb
index f5ff79b56d..c2c8a972c3 100644
--- a/test/psych/test_deprecated.rb
+++ b/test/psych/test_deprecated.rb
@@ -171,5 +171,15 @@ module Psych
       assert_equal 'null', Psych.detect_implicit('')
       assert_equal 'string', Psych.detect_implicit('foo')
     end
+
+    def test_private_type
+      types = []
+      Psych.add_private_type('foo') { |*args| types << args }
+      Psych.load <<-eoyml
+- !x-private:foo bar
+      eoyml
+
+      assert_equal [["x-private:foo", "bar"]], types
+    end
   end
 end