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-rw-r--r--actionmailer/lib/action_mailer/test_case.rb1
1 files changed, 0 insertions, 1 deletions
diff --git a/actionmailer/lib/action_mailer/test_case.rb b/actionmailer/lib/action_mailer/test_case.rb
index 529140dfad..108969ed4c 100644
--- a/actionmailer/lib/action_mailer/test_case.rb
+++ b/actionmailer/lib/action_mailer/test_case.rb
@@ -1,5 +1,4 @@
require 'active_support/test_case'
-require 'active_support/core_ext/class/attribute'
module ActionMailer
class NonInferrableMailerError < ::StandardError