14 files changed, 14 insertions, 0 deletions
diff --git a/test/dtrace/dummy.rb b/test/dtrace/dummy.rb
index e85614228c..932cb4e625 100644
--- a/test/dtrace/dummy.rb
+++ b/test/dtrace/dummy.rb
@@ -1 +1,2 @@
+# frozen_string_literal: false
 # this is a dummy file used by test/dtrace/test_require.rb
diff --git a/test/dtrace/helper.rb b/test/dtrace/helper.rb
index f76c41b025..a479b1adb7 100644
--- a/test/dtrace/helper.rb
+++ b/test/dtrace/helper.rb
@@ -1,4 +1,5 @@
 # -*- coding: us-ascii -*-
+# frozen_string_literal: false
 require 'test/unit'
 require 'tempfile'
 
diff --git a/test/dtrace/test_array_create.rb b/test/dtrace/test_array_create.rb
index d849bcc0c7..44d4657b61 100644
--- a/test/dtrace/test_array_create.rb
+++ b/test/dtrace/test_array_create.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_cmethod.rb b/test/dtrace/test_cmethod.rb
index 0a9107fa38..a0aa1b646b 100644
--- a/test/dtrace/test_cmethod.rb
+++ b/test/dtrace/test_cmethod.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_function_entry.rb b/test/dtrace/test_function_entry.rb
index 74aee64b02..fc07ccc455 100644
--- a/test/dtrace/test_function_entry.rb
+++ b/test/dtrace/test_function_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_gc.rb b/test/dtrace/test_gc.rb
index 2f58a11096..77de7998dd 100644
--- a/test/dtrace/test_gc.rb
+++ b/test/dtrace/test_gc.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_hash_create.rb b/test/dtrace/test_hash_create.rb
index 2cceded38f..83a4d0062c 100644
--- a/test/dtrace/test_hash_create.rb
+++ b/test/dtrace/test_hash_create.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_load.rb b/test/dtrace/test_load.rb
index cceb0c2925..1c208bd488 100644
--- a/test/dtrace/test_load.rb
+++ b/test/dtrace/test_load.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 require 'tempfile'
 
diff --git a/test/dtrace/test_method_cache.rb b/test/dtrace/test_method_cache.rb
index d8ddf454f4..7ecec194b2 100644
--- a/test/dtrace/test_method_cache.rb
+++ b/test/dtrace/test_method_cache.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_object_create_start.rb b/test/dtrace/test_object_create_start.rb
index 2be9611613..81f8ed2110 100644
--- a/test/dtrace/test_object_create_start.rb
+++ b/test/dtrace/test_object_create_start.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_raise.rb b/test/dtrace/test_raise.rb
index 48fdbf14d1..81e64e8c16 100644
--- a/test/dtrace/test_raise.rb
+++ b/test/dtrace/test_raise.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_require.rb b/test/dtrace/test_require.rb
index 46a1d7652a..9fa6c0e87c 100644
--- a/test/dtrace/test_require.rb
+++ b/test/dtrace/test_require.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_singleton_function.rb b/test/dtrace/test_singleton_function.rb
index 9e118f65b7..3698a02c93 100644
--- a/test/dtrace/test_singleton_function.rb
+++ b/test/dtrace/test_singleton_function.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace
diff --git a/test/dtrace/test_string.rb b/test/dtrace/test_string.rb
index 873d5ac364..407280b1fc 100644
--- a/test/dtrace/test_string.rb
+++ b/test/dtrace/test_string.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require_relative 'helper'
 
 module DTrace