diff --git a/spec/functions/getvar_spec.rb b/spec/functions/getvar_spec.rb
index 6ab137ec7..54f1842e1 100755
--- a/spec/functions/getvar_spec.rb
+++ b/spec/functions/getvar_spec.rb
@@ -6,6 +6,8 @@
   it { is_expected.to run.with_params('one', 'two').and_raise_error(Puppet::ParseError, /wrong number of arguments/i) }
   it { is_expected.to run.with_params().and_raise_error(Puppet::ParseError, /wrong number of arguments/i) }
 
+  it { is_expected.to run.with_params('$::foo').and_return(nil) }
+
   context 'given variables in namespaces' do
     let(:pre_condition) {
       <<-'ENDofPUPPETcode'