diff --git a/spec/rspec/support/method_signature_verifier_spec.rb b/spec/rspec/support/method_signature_verifier_spec.rb
index f8691705..482bcc33 100644
--- a/spec/rspec/support/method_signature_verifier_spec.rb
+++ b/spec/rspec/support/method_signature_verifier_spec.rb
@@ -1,6 +1,8 @@
 require 'rspec/support'
 require 'rspec/support/method_signature_verifier'
 
+def ruby2_keywords(*); end unless respond_to?(:ruby2_keywords, true)
+
 module RSpec
   module Support
     RSpec.describe 'verifying methods' do