diff --git a/test/integration/default/controls/config_spec.rb b/test/integration/default/controls/config_spec.rb
index d89c35f..6af3cf9 100644
--- a/test/integration/default/controls/config_spec.rb
+++ b/test/integration/default/controls/config_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 control 'users configuration' do
   title 'should match desired lines'