diff --git a/spec/hollerback_spec.rb b/spec/hollerback_spec.rb
index <HASH>..<HASH> 100644
--- a/spec/hollerback_spec.rb
+++ b/spec/hollerback_spec.rb
@@ -18,7 +18,7 @@ describe Hollerback do
 
   let(:test_class) do
     stub_const "TestClass", Class.new
-    TestClass.include(Hollerback)
+    TestClass.send(:include, Hollerback)
     TestClass
   end
Fixed: Ruby <I> include and prepend