diff --git a/elasticsearch-api/api-spec-testing/test_file/action.rb b/elasticsearch-api/api-spec-testing/test_file/action.rb
index bc7da39d1..869dd5760 100644
--- a/elasticsearch-api/api-spec-testing/test_file/action.rb
+++ b/elasticsearch-api/api-spec-testing/test_file/action.rb
@@ -157,7 +157,7 @@ def perform_action(method, args, client, test)
               transport_options: transport_options.merge(headers: headers)
             )
           end
-        when 'catch', 'warnings', 'allowed_warnings', 'allowed_warnings_regex'
+        when 'catch', 'warnings', 'allowed_warnings', 'allowed_warnings_regex', 'warnings_regex'
           client
         when 'put_trained_model_alias'
           args.merge!('reassign' => true) unless args['reassign'] === false