Error when trying to stub ChefVault item

Hi Chef Users,
I am trying to stub Chef Vault items in my spec file thusly:

The call to vault within the recipe looks like this:

The error I am receiving (also pasted on the bottom of the first link) is:Failure/Error: allow (ChefVault::Item).to receive(:load). NoMethodError: undefined method `to’ for ChefVault::Item:ClassAm I missing a syntax thing? rspec is from the ChefDK Omnibus install:bash-3.2$ /opt/chefdk/embedded/bin/rspec -v3.1.7Thanks,Joe