diff --git a/test/ruby/test_optimization.rb b/test/ruby/test_optimization.rb
index e6163c06e2..7f2db199ad 100644
--- a/test/ruby/test_optimization.rb
+++ b/test/ruby/test_optimization.rb
@@ -710,7 +710,7 @@ class TestRubyOptimization < Test::Unit::TestCase
       foo{}
       ObjectSpace.count_objects(h2)
 
-      assert_equal 0, h2[:TOTAL] - h1[:TOTAL]
+      assert_equal 0, h2[:T_DATA] - h1[:T_DATA] # Proc is T_DATA
     END
   end