diff --git a/.sync.yml b/.sync.yml
index 079eb29..2a799d4 100644
--- a/.sync.yml
+++ b/.sync.yml
@@ -3,3 +3,5 @@
   enabled_lint_checks:
     - parameter_types
     - parameter_documentation
+spec/spec_helper.rb:
+  facterdb_string_keys: true
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 58c9b66..d9a3f29 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -10,7 +10,7 @@
 require 'voxpupuli/test/spec_helper'
 
 RSpec.configure do |c|
-  c.facterdb_string_keys = false
+  c.facterdb_string_keys = true
 end
 
 add_mocked_facts!