diff --git a/spec/unit/parser/functions/lookup_spec.rb b/spec/unit/parser/functions/lookup_spec.rb
index <HASH>..<HASH> 100644
--- a/spec/unit/parser/functions/lookup_spec.rb
+++ b/spec/unit/parser/functions/lookup_spec.rb
@@ -3,6 +3,10 @@ require 'puppet/pops'
 require 'stringio'
 
 describe "lookup function" do
+  before(:each) do
+    Puppet[:binder] = true
+  end
+
   it "must be called with at least a name to lookup" do
     scope = scope_with_injections_from(bound(bindings))
(#<I>) Fix failing lookup function test (missing setting of --binder)

The lookup function test was missing because the setting --binder
was missing, and lookup only works when this feature is turned on).