1 files changed, 1 insertions, 1 deletions
diff --git a/test/json/test_json_generate.rb b/test/json/test_json_generate.rb
index 50895f6247..e5ae3f4987 100644
--- a/test/json/test_json_generate.rb
+++ b/test/json/test_json_generate.rb
@@ -286,7 +286,7 @@ EOT
   if defined?(JSON::Ext::Generator)
     def test_broken_bignum # [ruby-core:38867]
       pid = fork do
-        Bignum.class_eval do
+        Integer.class_eval do
           def to_s
           end
         end