diff --git a/lib/generators/rolemodel/base_generator.rb b/lib/generators/rolemodel/base_generator.rb
index 08898ccb..ebfe333d 100644
--- a/lib/generators/rolemodel/base_generator.rb
+++ b/lib/generators/rolemodel/base_generator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rails/generators/base'
 require 'rails/generators/bundle_helper'
 require_relative 'replace_content_helper'
diff --git a/lib/rolemodel-rails.rb b/lib/rolemodel-rails.rb
index fd394225..d6ccc1df 100644
--- a/lib/rolemodel-rails.rb
+++ b/lib/rolemodel-rails.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Rolemodel
   NODE_VERSION = '24.12.0'
   RUBY_VERSION = '4.0.1'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index d46b9c83..56d7e19f 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rails'
 require 'bundler/setup'
 require 'generator_spec'
diff --git a/spec/support/helpers/example_app.rb b/spec/support/helpers/example_app.rb
index 10f7ab6f..99a9dd26 100644
--- a/spec/support/helpers/example_app.rb
+++ b/spec/support/helpers/example_app.rb
@@ -26,8 +26,7 @@ def cleanup_test_app
 
   def clean_test_gemfile
     gemfile_path = File.join(destination_root, 'Gemfile')
-    gemfile = File.open(gemfile_path)
 
-    File.write(gemfile_path, gemfile.grep_v(/rolemodel-rails/).join)
+    File.write(gemfile_path, File.readlines(gemfile_path).grep_v(/rolemodel-rails/).join)
   end
 end