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-rw-r--r--activerecord/test/cases/explain_test.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activerecord/test/cases/explain_test.rb b/activerecord/test/cases/explain_test.rb
index 86fe90ae51..17654027a9 100644
--- a/activerecord/test/cases/explain_test.rb
+++ b/activerecord/test/cases/explain_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require "cases/helper"
require "models/car"
require "active_support/core_ext/string/strip"