diff --git a/.sync.yml b/.sync.yml
index cb28c684..6d2a69c3 100644
--- a/.sync.yml
+++ b/.sync.yml
@@ -4,3 +4,4 @@
     timeout_minutes: 75
 spec/spec_helper.rb:
   spec_overrides: "require 'spec_helper_methods'"
+  facterdb_string_keys: true
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 46d4c7f1..2f99127a 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -9,6 +9,10 @@
 
 require 'voxpupuli/test/spec_helper'
 
+RSpec.configure do |c|
+  c.facterdb_string_keys = true
+end
+
 add_mocked_facts!
 
 if File.exist?(File.join(__dir__, 'default_module_facts.yml'))