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-rw-r--r--actionmailer/test/abstract_unit.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/actionmailer/test/abstract_unit.rb b/actionmailer/test/abstract_unit.rb
index dbfdb07e6e..45f69d5375 100644
--- a/actionmailer/test/abstract_unit.rb
+++ b/actionmailer/test/abstract_unit.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "active_support/core_ext/kernel/reporting"
# These are the normal settings that will be set up by Railties