diff --git a/test/ruby/test_optimization.rb b/test/ruby/test_optimization.rb
index 853fade279..d6649cc958 100644
--- a/test/ruby/test_optimization.rb
+++ b/test/ruby/test_optimization.rb
@@ -802,7 +802,7 @@ class TestRubyOptimization < Test::Unit::TestCase
   end
 
   def test_optimized_empty_ensure
-    assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}", timeout: 1)
+    assert_separately([], "#{<<~"begin;"}\n#{<<~'end;'}", timeout: 10)
     begin;
       assert_raise(RuntimeError) {
         begin raise ensure nil if nil end