diff --git a/spec/ruby_llm/generators/install_generator_spec.rb b/spec/ruby_llm/generators/install_generator_spec.rb
index cbd6bc166..6b272b22f 100644
--- a/spec/ruby_llm/generators/install_generator_spec.rb
+++ b/spec/ruby_llm/generators/install_generator_spec.rb
@@ -75,7 +75,8 @@
         expect(File.exist?('config/initializers/ruby_llm.rb')).to be true
         initializer = File.read('config/initializers/ruby_llm.rb')
         expect(initializer).to include('RubyLLM.configure')
-        expect(initializer).to include('config.use_new_acts_as = true')
+        # use_new_acts_as defaults to true, so the generator no longer emits it
+        expect(initializer).not_to include('config.use_new_acts_as')
         # Default Model class doesn't need explicit config
         expect(initializer).not_to include('config.model_registry_class')
       end