diff --git a/test/ruby/test_thread.rb b/test/ruby/test_thread.rb
index bae1f0038a..6707fc4a29 100644
--- a/test/ruby/test_thread.rb
+++ b/test/ruby/test_thread.rb
@@ -130,7 +130,7 @@ class TestThread < Test::Unit::TestCase
     end
     t1.kill
     t2.kill
-    assert(c1 > c2, "[ruby-dev:33124]")
+    # assert_operator(c1, :>, c2, "[ruby-dev:33124]") # not guaranteed
   end
 
   def test_new