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-rw-r--r--activejob/lib/active_job/test_helper.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activejob/lib/active_job/test_helper.rb b/activejob/lib/active_job/test_helper.rb
index a61e4f59a5..60ca1b5f1b 100644
--- a/activejob/lib/active_job/test_helper.rb
+++ b/activejob/lib/active_job/test_helper.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "active_support/core_ext/class/subclasses"
require "active_support/core_ext/hash/keys"