15 files changed, 15 insertions, 0 deletions
diff --git a/test/ruby/enc/test_big5.rb b/test/ruby/enc/test_big5.rb
index e8fe0270a8..5dcf93e8e3 100644
--- a/test/ruby/enc/test_big5.rb
+++ b/test/ruby/enc/test_big5.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 
 class TestBig5 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_cp949.rb b/test/ruby/enc/test_cp949.rb
index e675c7b80c..0684162d5b 100644
--- a/test/ruby/enc/test_cp949.rb
+++ b/test/ruby/enc/test_cp949.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 
 class TestCP949 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_emoji.rb b/test/ruby/enc/test_emoji.rb
index 1f80c5a79e..330ff70cb9 100644
--- a/test/ruby/enc/test_emoji.rb
+++ b/test/ruby/enc/test_emoji.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 
 module Emoji
diff --git a/test/ruby/enc/test_euc_jp.rb b/test/ruby/enc/test_euc_jp.rb
index 510ee4611e..4aec69e4db 100644
--- a/test/ruby/enc/test_euc_jp.rb
+++ b/test/ruby/enc/test_euc_jp.rb
@@ -1,4 +1,5 @@
 # vim: set fileencoding=euc-jp
+# frozen_string_literal: false
 
 require "test/unit"
 
diff --git a/test/ruby/enc/test_euc_kr.rb b/test/ruby/enc/test_euc_kr.rb
index 5413fa6062..c9de2cc4e1 100644
--- a/test/ruby/enc/test_euc_kr.rb
+++ b/test/ruby/enc/test_euc_kr.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 
 class TestEucKr < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_euc_tw.rb b/test/ruby/enc/test_euc_tw.rb
index f36d86b088..649b1b81c6 100644
--- a/test/ruby/enc/test_euc_tw.rb
+++ b/test/ruby/enc/test_euc_tw.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 
 class TestEucTw < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_gb18030.rb b/test/ruby/enc/test_gb18030.rb
index f379504d48..76ac785951 100644
--- a/test/ruby/enc/test_gb18030.rb
+++ b/test/ruby/enc/test_gb18030.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 
 class TestGB18030 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_gbk.rb b/test/ruby/enc/test_gbk.rb
index d6dc5d6d1b..2e541b5821 100644
--- a/test/ruby/enc/test_gbk.rb
+++ b/test/ruby/enc/test_gbk.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 
 class TestGBK < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_iso_8859.rb b/test/ruby/enc/test_iso_8859.rb
index 64cc7cd76d..f6b3b3f28b 100644
--- a/test/ruby/enc/test_iso_8859.rb
+++ b/test/ruby/enc/test_iso_8859.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 
 class TestISO8859 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_koi8.rb b/test/ruby/enc/test_koi8.rb
index ce2d8925ea..4a4d233e8d 100644
--- a/test/ruby/enc/test_koi8.rb
+++ b/test/ruby/enc/test_koi8.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 
 class TestKOI8 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_shift_jis.rb b/test/ruby/enc/test_shift_jis.rb
index 1bd47fa859..059992d167 100644
--- a/test/ruby/enc/test_shift_jis.rb
+++ b/test/ruby/enc/test_shift_jis.rb
@@ -1,4 +1,5 @@
 # vim: set fileencoding=shift_jis
+# frozen_string_literal: false
 
 require "test/unit"
 
diff --git a/test/ruby/enc/test_utf16.rb b/test/ruby/enc/test_utf16.rb
index 63929c6f4b..99b48c2982 100644
--- a/test/ruby/enc/test_utf16.rb
+++ b/test/ruby/enc/test_utf16.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 
 class TestUTF16 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_utf32.rb b/test/ruby/enc/test_utf32.rb
index 29a2240598..23e8aeb315 100644
--- a/test/ruby/enc/test_utf32.rb
+++ b/test/ruby/enc/test_utf32.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 
 class TestUTF32 < Test::Unit::TestCase
diff --git a/test/ruby/enc/test_windows_1251.rb b/test/ruby/enc/test_windows_1251.rb
index 6fbf3159a1..002dbaa3cc 100644
--- a/test/ruby/enc/test_windows_1251.rb
+++ b/test/ruby/enc/test_windows_1251.rb
@@ -1,4 +1,5 @@
 # encoding:windows-1251
+# frozen_string_literal: false
 
 require "test/unit"
 
diff --git a/test/ruby/enc/test_windows_1252.rb b/test/ruby/enc/test_windows_1252.rb
index 72ee3d201a..f264cba759 100644
--- a/test/ruby/enc/test_windows_1252.rb
+++ b/test/ruby/enc/test_windows_1252.rb
@@ -1,4 +1,5 @@
 # encoding:windows-1252
+# frozen_string_literal: false
 
 require "test/unit"