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-rw-r--r--test/rexml/parser/test_sax2.rb1
-rw-r--r--test/rexml/parser/test_tree.rb1
-rw-r--r--test/rexml/parser/test_ultra_light.rb1
3 files changed, 3 insertions, 0 deletions
diff --git a/test/rexml/parser/test_sax2.rb b/test/rexml/parser/test_sax2.rb
index dba5eab033..91d135f5f7 100644
--- a/test/rexml/parser/test_sax2.rb
+++ b/test/rexml/parser/test_sax2.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "rexml/parsers/sax2parser"
require "rexml/sax2listener"
diff --git a/test/rexml/parser/test_tree.rb b/test/rexml/parser/test_tree.rb
index fa010f6975..7ab0addca1 100644
--- a/test/rexml/parser/test_tree.rb
+++ b/test/rexml/parser/test_tree.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "rexml/document"
require "rexml/parsers/treeparser"
diff --git a/test/rexml/parser/test_ultra_light.rb b/test/rexml/parser/test_ultra_light.rb
index 4960fc16dc..c48a13d311 100644
--- a/test/rexml/parser/test_ultra_light.rb
+++ b/test/rexml/parser/test_ultra_light.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require "test/unit"
require "rexml/parsers/ultralightparser"