PuppetSyntax.future_parser = true

Rakefile

@@ -31,6 +31,7 @@ exclude_paths = [
 ]
 PuppetLint.configuration.ignore_paths = exclude_paths
 PuppetSyntax.exclude_paths = exclude_paths
+PuppetSyntax.future_parser = true
 
 desc "Run acceptance tests"
 RSpec::Core::RakeTask.new(:acceptance) do |t|