6 files changed, 6 insertions, 0 deletions
diff --git a/actioncable/test/stubs/global_id.rb b/actioncable/test/stubs/global_id.rb
index 334f0d03e8..374503487d 100644
--- a/actioncable/test/stubs/global_id.rb
+++ b/actioncable/test/stubs/global_id.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class GlobalID
   attr_reader :uri
   delegate :to_param, :to_s, to: :uri
diff --git a/actioncable/test/stubs/room.rb b/actioncable/test/stubs/room.rb
index 1664b07d12..662200aa68 100644
--- a/actioncable/test/stubs/room.rb
+++ b/actioncable/test/stubs/room.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class Room
   attr_reader :id, :name
 
diff --git a/actioncable/test/stubs/test_adapter.rb b/actioncable/test/stubs/test_adapter.rb
index bbd142b287..0d23576d2c 100644
--- a/actioncable/test/stubs/test_adapter.rb
+++ b/actioncable/test/stubs/test_adapter.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class SuccessAdapter < ActionCable::SubscriptionAdapter::Base
   def broadcast(channel, payload)
   end
diff --git a/actioncable/test/stubs/test_connection.rb b/actioncable/test/stubs/test_connection.rb
index cd2e219d88..c543518929 100644
--- a/actioncable/test/stubs/test_connection.rb
+++ b/actioncable/test/stubs/test_connection.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "stubs/user"
 
 class TestConnection
diff --git a/actioncable/test/stubs/test_server.rb b/actioncable/test/stubs/test_server.rb
index 5bf2a151dc..fc5b0df6bc 100644
--- a/actioncable/test/stubs/test_server.rb
+++ b/actioncable/test/stubs/test_server.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 require "ostruct"
 
 class TestServer
diff --git a/actioncable/test/stubs/user.rb b/actioncable/test/stubs/user.rb
index a66b4f87d5..e6b917b281 100644
--- a/actioncable/test/stubs/user.rb
+++ b/actioncable/test/stubs/user.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 class User
   attr_reader :name