3 files changed, 6 insertions, 0 deletions
diff --git a/test/content_type/tc_content_type.rb b/test/content_type/tc_content_type.rb
index e94f311e..a3c6603f 100644
--- a/test/content_type/tc_content_type.rb
+++ b/test/content_type/tc_content_type.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'tc_helper'
 
 class TestContentType < Test::Unit::TestCase
diff --git a/test/content_type/tc_default.rb b/test/content_type/tc_default.rb
index e3d8d75e..89125bf1 100644
--- a/test/content_type/tc_default.rb
+++ b/test/content_type/tc_default.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'tc_helper'
 
 class TestDefault < Test::Unit::TestCase
diff --git a/test/content_type/tc_override.rb b/test/content_type/tc_override.rb
index ad0699b5..73a13410 100644
--- a/test/content_type/tc_override.rb
+++ b/test/content_type/tc_override.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'tc_helper'
 
 class TestOverride < Test::Unit::TestCase