1 files changed, 5 insertions, 2 deletions
diff --git a/test/ruby/test_object.rb b/test/ruby/test_object.rb
index eddfa9f116..bbc04b0e4a 100644
--- a/test/ruby/test_object.rb
+++ b/test/ruby/test_object.rb
@@ -320,9 +320,12 @@ class TestObject < Test::Unit::TestCase
     INPUT
 
     bug10421 = '[ruby-dev:48691] [Bug #10421]'
-    assert_in_out_err([], <<-INPUT, [], [], bug10421)
+    assert_in_out_err([], <<-INPUT, ["1"], [], bug10421)
       $VERBOSE = false
-      def (BasicObject.new).object_id; end
+      class C < BasicObject
+        def object_id; 1; end
+      end
+      puts C.new.object_id
     INPUT
   end