3 files changed, 3 insertions, 3 deletions
diff --git a/railties/test/generators/app_generator_test.rb b/railties/test/generators/app_generator_test.rb
index 14cdd8b5c9..1169633244 100644
--- a/railties/test/generators/app_generator_test.rb
+++ b/railties/test/generators/app_generator_test.rb
@@ -964,7 +964,7 @@ class AppGeneratorTest < Rails::Generators::TestCase
 
   def test_after_bundle_callback
     path = "http://example.org/rails_template"
-    template = %{ after_bundle { run 'echo ran after_bundle' } }.dup
+    template = +%{ after_bundle { run 'echo ran after_bundle' } }
     template.instance_eval "def read; self; end" # Make the string respond to read
 
     check_open = -> *args do
diff --git a/railties/test/generators/plugin_generator_test.rb b/railties/test/generators/plugin_generator_test.rb
index 20acd23329..468a9c9e89 100644
--- a/railties/test/generators/plugin_generator_test.rb
+++ b/railties/test/generators/plugin_generator_test.rb
@@ -737,7 +737,7 @@ class PluginGeneratorTest < Rails::Generators::TestCase
 
   def test_after_bundle_callback
     path = "http://example.org/rails_template"
-    template = %{ after_bundle { run "echo ran after_bundle" } }.dup
+    template = +%{ after_bundle { run "echo ran after_bundle" } }
     template.instance_eval "def read; self; end" # Make the string respond to read
 
     check_open = -> *args do
diff --git a/railties/test/generators/shared_generator_tests.rb b/railties/test/generators/shared_generator_tests.rb
index aa577e4234..5a1257e5c1 100644
--- a/railties/test/generators/shared_generator_tests.rb
+++ b/railties/test/generators/shared_generator_tests.rb
@@ -83,7 +83,7 @@ module SharedGeneratorTests
 
   def test_template_is_executed_when_supplied_an_https_path
     path = "https://gist.github.com/josevalim/103208/raw/"
-    template = %{ say "It works!" }.dup
+    template = +%{ say "It works!" }
     template.instance_eval "def read; self; end" # Make the string respond to read
 
     check_open = -> *args do