diff --git a/spec/encoder_spec.rb b/spec/encoder_spec.rb
index 0e90b9f..ae23bd2 100644
--- a/spec/encoder_spec.rb
+++ b/spec/encoder_spec.rb
@@ -6,6 +6,7 @@
   let(:salt) { SaltGenerator.generate }
   let(:environments) { [] }
   let(:current_flavor) { nil }
+  let(:should_infer_types) { true }
 
   describe ".encode!" do
     context "when keys is empty" do