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-rw-r--r--railties/test/railties/engine_test.rb1
-rw-r--r--railties/test/railties/generators_test.rb1
-rw-r--r--railties/test/railties/mounted_engine_test.rb1
-rw-r--r--railties/test/railties/railtie_test.rb1
4 files changed, 4 insertions, 0 deletions
diff --git a/railties/test/railties/engine_test.rb b/railties/test/railties/engine_test.rb
index e382a7a873..19d2a2e4f6 100644
--- a/railties/test/railties/engine_test.rb
+++ b/railties/test/railties/engine_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "isolation/abstract_unit"
require "stringio"
require "rack/test"
diff --git a/railties/test/railties/generators_test.rb b/railties/test/railties/generators_test.rb
index 5c691b9ec4..22c2697577 100644
--- a/railties/test/railties/generators_test.rb
+++ b/railties/test/railties/generators_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
RAILS_ISOLATED_ENGINE = true
require "isolation/abstract_unit"
diff --git a/railties/test/railties/mounted_engine_test.rb b/railties/test/railties/mounted_engine_test.rb
index 6639e55382..b4efe50038 100644
--- a/railties/test/railties/mounted_engine_test.rb
+++ b/railties/test/railties/mounted_engine_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "isolation/abstract_unit"
module ApplicationTests
diff --git a/railties/test/railties/railtie_test.rb b/railties/test/railties/railtie_test.rb
index 30cd525266..be77af8134 100644
--- a/railties/test/railties/railtie_test.rb
+++ b/railties/test/railties/railtie_test.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "isolation/abstract_unit"
module RailtiesTest