6 files changed, 6 insertions, 0 deletions
diff --git a/test/rexml/xpath/test_attribute.rb b/test/rexml/xpath/test_attribute.rb
index 95af4de399..9304db4e0d 100644
--- a/test/rexml/xpath/test_attribute.rb
+++ b/test/rexml/xpath/test_attribute.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 require 'rexml/document'
 
diff --git a/test/rexml/xpath/test_axis_preceding_sibling.rb b/test/rexml/xpath/test_axis_preceding_sibling.rb
index 273180772a..5842c6bc50 100644
--- a/test/rexml/xpath/test_axis_preceding_sibling.rb
+++ b/test/rexml/xpath/test_axis_preceding_sibling.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit/testcase"
 require "rexml/document"
 
diff --git a/test/rexml/xpath/test_base.rb b/test/rexml/xpath/test_base.rb
index a57ba632c4..5079fdd75a 100644
--- a/test/rexml/xpath/test_base.rb
+++ b/test/rexml/xpath/test_base.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative "../rexml_test_utils"
 
 require "rexml/document"
diff --git a/test/rexml/xpath/test_node.rb b/test/rexml/xpath/test_node.rb
index aec2de1cfe..e0e958e70f 100644
--- a/test/rexml/xpath/test_node.rb
+++ b/test/rexml/xpath/test_node.rb
@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
+# frozen_string_literal: false
 
 require_relative "../rexml_test_utils"
 
diff --git a/test/rexml/xpath/test_predicate.rb b/test/rexml/xpath/test_predicate.rb
index 287e131c54..ce1aaa324b 100644
--- a/test/rexml/xpath/test_predicate.rb
+++ b/test/rexml/xpath/test_predicate.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit/testcase"
 require "rexml/document"
 require "rexml/xpath"
diff --git a/test/rexml/xpath/test_text.rb b/test/rexml/xpath/test_text.rb
index 46aba3c2ef..03afe9667c 100644
--- a/test/rexml/xpath/test_text.rb
+++ b/test/rexml/xpath/test_text.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 require 'rexml/document'
 require 'rexml/element'