diff --git a/actionmailer/test/parameterized_test.rb b/actionmailer/test/parameterized_test.rb
index 3713dc3e3e..3369808515 100644
--- a/actionmailer/test/parameterized_test.rb
+++ b/actionmailer/test/parameterized_test.rb
@@ -83,6 +83,7 @@ class ParameterizedTest < ActiveSupport::TestCase
     def with_delivery_job(job)
       old_delivery_job = ParamsMailer.delivery_job
       ParamsMailer.delivery_job = job
+      yield
     ensure
       ParamsMailer.delivery_job = old_delivery_job
     end