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-rw-r--r--test/test_middleware_unicorn_ipv6.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/test_middleware_unicorn_ipv6.rb b/test/test_middleware_unicorn_ipv6.rb
index 3d6862c..99ecb7f 100644
--- a/test/test_middleware_unicorn_ipv6.rb
+++ b/test/test_middleware_unicorn_ipv6.rb
@@ -1,4 +1,5 @@
 # -*- encoding: binary -*-
+# frozen_string_literal: false
 require "./test/rack_unicorn"
 require "./test/ipv6_enabled"
 $stderr.sync = $stdout.sync = true