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-rw-r--r--test/drb/ut_port.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/drb/ut_port.rb b/test/drb/ut_port.rb
index 3009db5acdd..d317a307cc1 100644
--- a/test/drb/ut_port.rb
+++ b/test/drb/ut_port.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'drb/drb'
require 'drb/extserv'