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-rw-r--r--railties/test/abstract_unit.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/railties/test/abstract_unit.rb b/railties/test/abstract_unit.rb
index 2d4c7a0f0b..a63b7a8377 100644
--- a/railties/test/abstract_unit.rb
+++ b/railties/test/abstract_unit.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
ENV["RAILS_ENV"] ||= "test"
require "stringio"