diff --git a/spec/mailers/test_mailer_spec.rb b/spec/mailers/test_mailer_spec.rb
index 71087a9f36..e0b023c6bf 100644
--- a/spec/mailers/test_mailer_spec.rb
+++ b/spec/mailers/test_mailer_spec.rb
@@ -15,7 +15,7 @@ describe Spree::TestMailer do
   it "confirm_email accepts a user id as an alternative to a User object" do
     expect(Spree.user_class).to receive(:find).with(user.id).and_return(user)
     expect {
-      test_email = Spree::TestMailer.test_email(user.id)
+      Spree::TestMailer.test_email(user.id).deliver
     }.to_not raise_error
   end
 end