2 files changed, 3 insertions, 3 deletions
diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 8205743de3..5aa3c4fa97 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -580,7 +580,7 @@ module ActionMailer
       end
 
       def respond_to_missing?(method, include_all = false)
-        action_methods.include?(method.to_s)
+        action_methods.include?(method.to_s) || super
       end
     end
 
diff --git a/actionmailer/lib/action_mailer/test_case.rb b/actionmailer/lib/action_mailer/test_case.rb
index cbd841466d..9ead03a40c 100644
--- a/actionmailer/lib/action_mailer/test_case.rb
+++ b/actionmailer/lib/action_mailer/test_case.rb
@@ -4,8 +4,8 @@ require "rails-dom-testing"
 module ActionMailer
   class NonInferrableMailerError < ::StandardError
     def initialize(name)
-      super "Unable to determine the mailer to test from #{name}. " +
-        "You'll need to specify it using tests YourMailer in your " +
+      super "Unable to determine the mailer to test from #{name}. " \
+        "You'll need to specify it using tests YourMailer in your " \
         "test case definition"
     end
   end