Specify yamler before runnnig tests.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32042 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 0 deletions

diff --git a/test/syck/test_class.rb b/test/syck/test_class.rb
index 803a1f14b4..983cf4192c 100644
--- a/test/syck/test_class.rb
+++ b/test/syck/test_class.rb
@@ -3,6 +3,15 @@ require 'yaml'
 
 module Syck
   class TestClass < Test::Unit::TestCase
+    def setup
+      @engine = YAML::ENGINE.yamler
+      YAML::ENGINE.yamler = 'syck'
+    end
+
+    def teardown
+      YAML::ENGINE.yamler = @engine
+    end
+
     def test_to_yaml
       assert_raises(::TypeError) do
         TestClass.to_yaml