14 files changed, 14 insertions, 0 deletions
diff --git a/test/net/http/test_buffered_io.rb b/test/net/http/test_buffered_io.rb
index e24e7c1ed9..8c299ead03 100644
--- a/test/net/http/test_buffered_io.rb
+++ b/test/net/http/test_buffered_io.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'test/unit'
 require 'net/http'
 require 'stringio'
diff --git a/test/net/http/test_http.rb b/test/net/http/test_http.rb
index 714e576cc1..d8983e91cd 100644
--- a/test/net/http/test_http.rb
+++ b/test/net/http/test_http.rb
@@ -1,4 +1,5 @@
 # coding: US-ASCII
+# frozen_string_literal: false
 require 'test/unit'
 require 'net/http'
 require 'stringio'
diff --git a/test/net/http/test_http_request.rb b/test/net/http/test_http_request.rb
index 1dcb847c3f..35c935ac58 100644
--- a/test/net/http/test_http_request.rb
+++ b/test/net/http/test_http_request.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/http'
 require 'test/unit'
 require 'stringio'
diff --git a/test/net/http/test_httpheader.rb b/test/net/http/test_httpheader.rb
index 224d8bb9a9..2f3a0f1157 100644
--- a/test/net/http/test_httpheader.rb
+++ b/test/net/http/test_httpheader.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/http'
 require 'test/unit'
 
diff --git a/test/net/http/test_httpresponse.rb b/test/net/http/test_httpresponse.rb
index a86020581c..eb1a792e87 100644
--- a/test/net/http/test_httpresponse.rb
+++ b/test/net/http/test_httpresponse.rb
@@ -1,4 +1,5 @@
 # coding: US-ASCII
+# frozen_string_literal: false
 require 'net/http'
 require 'test/unit'
 require 'stringio'
diff --git a/test/net/http/test_httpresponses.rb b/test/net/http/test_httpresponses.rb
index bf7fbeef11..b389e163cf 100644
--- a/test/net/http/test_httpresponses.rb
+++ b/test/net/http/test_httpresponses.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/http'
 require 'test/unit'
 
diff --git a/test/net/http/test_https.rb b/test/net/http/test_https.rb
index 8177d9451f..dfdb221d7e 100644
--- a/test/net/http/test_https.rb
+++ b/test/net/http/test_https.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 begin
   require 'net/https'
diff --git a/test/net/http/test_https_proxy.rb b/test/net/http/test_https_proxy.rb
index 1c8503b7e1..f833f1a1e3 100644
--- a/test/net/http/test_https_proxy.rb
+++ b/test/net/http/test_https_proxy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 begin
   require 'net/https'
 rescue LoadError
diff --git a/test/net/http/utils.rb b/test/net/http/utils.rb
index dcd94693c2..8d0ecd6020 100644
--- a/test/net/http/utils.rb
+++ b/test/net/http/utils.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'webrick'
 begin
   require "webrick/https"
diff --git a/test/net/pop/test_pop.rb b/test/net/pop/test_pop.rb
index 7aa65a4432..f06ccb4452 100644
--- a/test/net/pop/test_pop.rb
+++ b/test/net/pop/test_pop.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/pop'
 require 'test/unit'
 require 'digest/md5'
diff --git a/test/net/protocol/test_protocol.rb b/test/net/protocol/test_protocol.rb
index 4453422552..0161fbc3a0 100644
--- a/test/net/protocol/test_protocol.rb
+++ b/test/net/protocol/test_protocol.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require "test/unit"
 require "net/protocol"
 require "stringio"
diff --git a/test/net/smtp/test_response.rb b/test/net/smtp/test_response.rb
index cfd90b18ec..79ac1d2d32 100644
--- a/test/net/smtp/test_response.rb
+++ b/test/net/smtp/test_response.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/smtp'
 require 'test/unit'
 
diff --git a/test/net/smtp/test_smtp.rb b/test/net/smtp/test_smtp.rb
index d8bb0c192c..0edb3419d5 100644
--- a/test/net/smtp/test_smtp.rb
+++ b/test/net/smtp/test_smtp.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/smtp'
 require 'stringio'
 require 'test/unit'
diff --git a/test/net/smtp/test_ssl_socket.rb b/test/net/smtp/test_ssl_socket.rb
index ff229b5ad0..20792190c8 100644
--- a/test/net/smtp/test_ssl_socket.rb
+++ b/test/net/smtp/test_ssl_socket.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
 require 'net/smtp'
 require 'test/unit'