diff --git a/spec/integration/mutant/test_mutator_handles_types_spec.rb b/spec/integration/mutant/test_mutator_handles_types_spec.rb
index be5eb57a..67b85de3 100644
--- a/spec/integration/mutant/test_mutator_handles_types_spec.rb
+++ b/spec/integration/mutant/test_mutator_handles_types_spec.rb
@@ -2,7 +2,7 @@ RSpec.describe do
 
   specify 'mutant should not crash for any node parser can generate' do
     Mutant::AST::Types::ALL.each do |type|
-      Mutant::Mutator::Registry.lookup(s(type))
+      Mutant::Mutator::REGISTRY.lookup(s(type))
     end
   end
 end