diff --git a/spec/producer/core/task/dsl_spec.rb b/spec/producer/core/task/dsl_spec.rb
index afe91a4..9f5be3a 100644
--- a/spec/producer/core/task/dsl_spec.rb
+++ b/spec/producer/core/task/dsl_spec.rb
@@ -16,7 +16,11 @@ module Producer::Core
       let(:name) { :some_task }
 
       it 'builds a new DSL sandbox with given code' do
-        expect(Task::DSL).to receive(:new).with(&block).and_call_original
+        dsl = double('dsl').as_null_object
+        expect(Task::DSL).to receive(:new).with(no_args) do |&b|
+          expect(b).to be block
+          dsl
+        end
         Task::DSL.evaluate(name, env, &block)
       end