diff --git a/spec/lib/balancer_delivery_method_spec.rb b/spec/lib/balancer_delivery_method_spec.rb
index bf5e39b52..7fb2495be 100644
--- a/spec/lib/balancer_delivery_method_spec.rb
+++ b/spec/lib/balancer_delivery_method_spec.rb
@@ -35,7 +35,7 @@ RSpec.describe BalancerDeliveryMethod do
     end
 
     def deliver!(mail)
-      Mail::CheckDeliveryParams.check(mail)
+      Mail::SmtpEnvelope.new(mail)
       self.class.deliveries << mail
     end
   end