diff --git a/hearth/spec/hearth/refreshing_identity_resolver_spec.rb b/hearth/spec/hearth/refreshing_identity_resolver_spec.rb
index b80a0afc3..dbc21952d 100644
--- a/hearth/spec/hearth/refreshing_identity_resolver_spec.rb
+++ b/hearth/spec/hearth/refreshing_identity_resolver_spec.rb
@@ -45,6 +45,7 @@ def refresh(properties = {})
         end
 
         it 'refreshes synchronously' do
+          expect(Thread).not_to receive(:new)
           expect(proc).to receive(:call)
             .with(properties).and_return(near_sync_expiration_identity)
           expect(proc).to receive(:call)