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-rw-r--r--test/json/setup_variant.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/json/setup_variant.rb b/test/json/setup_variant.rb
index 2dab184bc4..f7fb2a1d56 100644
--- a/test/json/setup_variant.rb
+++ b/test/json/setup_variant.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
case ENV['JSON']
when 'pure'
$:.unshift 'lib'