diff --git a/lib/producer/core/env.rb b/lib/producer/core/env.rb
index 25adf51..76edb59 100644
--- a/lib/producer/core/env.rb
+++ b/lib/producer/core/env.rb
@@ -4,7 +4,7 @@ module Producer
       attr_reader   :current_recipe
       attr_accessor :target
 
-      def initialize(recipe)
+      def initialize(recipe = nil)
         @current_recipe = recipe
         @target         = nil
       end
diff --git a/spec/producer/core/env_spec.rb b/spec/producer/core/env_spec.rb
index 64354e9..5575852 100644
--- a/spec/producer/core/env_spec.rb
+++ b/spec/producer/core/env_spec.rb
@@ -2,18 +2,26 @@ require 'spec_helper'
 
 module Producer::Core
   describe Env do
-    let(:recipe)  { Recipe.new(proc { nil }) }
-    subject(:env) { Env.new(recipe) }
+    subject(:env) { Env.new }
 
     describe '#initialize' do
       it 'has no target' do
         expect(env.target).not_to be
       end
-    end
 
-    describe '#current_recipe' do
-      it 'returns the assigned current recipe' do
-        expect(env.current_recipe).to eq recipe
+      context 'without argument' do
+        it 'has no recipe' do
+          expect(env.current_recipe).not_to be
+        end
+      end
+
+      context 'when a recipe is given as argument' do
+        let(:recipe)  { Recipe.new(proc { nil }) }
+        subject(:env) { Env.new(recipe) }
+
+        it 'assigns the current recipe' do
+          expect(env.current_recipe).to eq recipe
+        end
       end
     end