diff --git a/spec/performable_mailer_spec.rb b/spec/performable_mailer_spec.rb
index ceecc5e40..c4b98a95f 100644
--- a/spec/performable_mailer_spec.rb
+++ b/spec/performable_mailer_spec.rb
@@ -3,7 +3,7 @@
 require 'action_mailer'
 class MyMailer < ActionMailer::Base
   def signup(email)
-    mail :to => email, :subject => "Delaying Emails"
+    mail :to => email, :subject => "Delaying Emails", :from => "delayedjob@example.com"
   end
 end