diff --git a/test/ruby/test_refinement.rb b/test/ruby/test_refinement.rb
index 1f2a67eeb2..51231bd56c 100644
--- a/test/ruby/test_refinement.rb
+++ b/test/ruby/test_refinement.rb
@@ -920,7 +920,7 @@ class TestRefinement < Test::Unit::TestCase
         #{PrependAfterRefine_CODE}
         undef PrependAfterRefine
       }
-    }, timeout: 30
+    }, timeout: 60
   end
 
   def test_prepend_after_refine