diff --git a/test/integration/default/controls/config_spec.rb b/test/integration/default/controls/config_spec.rb
index 7a17f23..3ba827d 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 'Keepalived configuration' do
   title 'should match desired lines'
 
diff --git a/test/integration/default/controls/package_spec.rb b/test/integration/default/controls/package_spec.rb
index 96ffbc8..1c9cfc5 100644
--- a/test/integration/default/controls/package_spec.rb
+++ b/test/integration/default/controls/package_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 control 'Keepalived package' do
   title 'should be installed'