diff --git a/spec/lib/spree/core/calculated_adjustments_spec.rb b/spec/lib/spree/core/calculated_adjustments_spec.rb
index b701fff3e0..b9210c4f29 100644
--- a/spec/lib/spree/core/calculated_adjustments_spec.rb
+++ b/spec/lib/spree/core/calculated_adjustments_spec.rb
@@ -24,7 +24,7 @@ describe Spree::Core::CalculatedAdjustments do
     let(:target) { order }
 
     it "should be associated with the target" do
-      target.adjustments.should_receive(:create)
+      expect(target.adjustments).to receive(:create)
       tax_rate.create_adjustment("foo", target, order)
     end
 
@@ -42,7 +42,7 @@ describe Spree::Core::CalculatedAdjustments do
     end
 
     context "when the calculator returns 0" do
-      before { calculator.stub(compute: 0) }
+      before { allow(calculator).to receive_messages(compute: 0) }
 
       context "when adjustment is mandatory" do
         before { tax_rate.create_adjustment("foo", target, order, true) }
@@ -66,7 +66,7 @@ describe Spree::Core::CalculatedAdjustments do
     it "should update the adjustment using its calculator (and the specified source)" do
       adjustment = double(:adjustment).as_null_object
       calculable = double :calculable
-      adjustment.should_receive(:update_column).with(:amount, 10)
+      expect(adjustment).to receive(:update_column).with(:amount, 10)
       tax_rate.update_adjustment(adjustment, calculable)
     end
   end
diff --git a/spec/lib/spree/core/mail_settings_spec.rb b/spec/lib/spree/core/mail_settings_spec.rb
index 753f8465ee..a8db4d5eed 100644
--- a/spec/lib/spree/core/mail_settings_spec.rb
+++ b/spec/lib/spree/core/mail_settings_spec.rb
@@ -12,8 +12,8 @@ module Spree
 
         context "init" do
           it "calls override!" do
-            MailSettings.should_receive(:new).and_return(subject)
-            subject.should_receive(:override!)
+            expect(MailSettings).to receive(:new).and_return(subject)
+            expect(subject).to receive(:override!)
             MailSettings.init
           end
         end
@@ -80,7 +80,7 @@ module Spree
 
         context "init" do
           it "doesnt calls override!" do
-            subject.should_not_receive(:override!)
+            expect(subject).not_to receive(:override!)
             MailSettings.init
           end
         end
diff --git a/spec/lib/spree/core/token_resource_spec.rb b/spec/lib/spree/core/token_resource_spec.rb
index b5be7195c0..087c5b9350 100644
--- a/spec/lib/spree/core/token_resource_spec.rb
+++ b/spec/lib/spree/core/token_resource_spec.rb
@@ -16,8 +16,8 @@ describe Spree::Core::TokenResource do
 
   context '#token' do
     it 'should return the token of the associated permission' do
-      order.stub tokenized_permission: permission
-      permission.stub token: 'foo'
+      allow(order).to receive_messages tokenized_permission: permission
+      allow(permission).to receive_messages token: 'foo'
       expect(order.token).to eq 'foo'
     end
 
diff --git a/spec/lib/spree/product_duplicator_spec.rb b/spec/lib/spree/product_duplicator_spec.rb
index 0a9a702eed..7978465a5e 100644
--- a/spec/lib/spree/product_duplicator_spec.rb
+++ b/spec/lib/spree/product_duplicator_spec.rb
@@ -49,36 +49,36 @@ module Spree
     end
 
     before do
-      product.should_receive(:dup).and_return(new_product)
-      variant.should_receive(:dup).and_return(new_variant)
-      image.should_receive(:dup).and_return(new_image)
-      property.should_receive(:dup).and_return(new_property)
+      expect(product).to receive(:dup).and_return(new_product)
+      expect(variant).to receive(:dup).and_return(new_variant)
+      expect(image).to receive(:dup).and_return(new_image)
+      expect(property).to receive(:dup).and_return(new_property)
     end
 
     it "can duplicate a product" do
       duplicator = Spree::ProductDuplicator.new(product)
-      new_product.should_receive(:name=).with("COPY OF foo")
-      new_product.should_receive(:taxons=).with([])
-      new_product.should_receive(:product_properties=).with([new_property])
-      new_product.should_receive(:created_at=).with(nil)
-      new_product.should_receive(:updated_at=).with(nil)
-      new_product.should_receive(:deleted_at=).with(nil)
-      new_product.should_receive(:master=).with(new_variant)
+      expect(new_product).to receive(:name=).with("COPY OF foo")
+      expect(new_product).to receive(:taxons=).with([])
+      expect(new_product).to receive(:product_properties=).with([new_property])
+      expect(new_product).to receive(:created_at=).with(nil)
+      expect(new_product).to receive(:updated_at=).with(nil)
+      expect(new_product).to receive(:deleted_at=).with(nil)
+      expect(new_product).to receive(:master=).with(new_variant)
 
-      new_variant.should_receive(:sku=).with("COPY OF 12345")
-      new_variant.should_receive(:deleted_at=).with(nil)
-      new_variant.should_receive(:images=).with([new_image])
-      new_variant.should_receive(:price=).with(variant.price)
-      new_variant.should_receive(:currency=).with(variant.currency)
+      expect(new_variant).to receive(:sku=).with("COPY OF 12345")
+      expect(new_variant).to receive(:deleted_at=).with(nil)
+      expect(new_variant).to receive(:images=).with([new_image])
+      expect(new_variant).to receive(:price=).with(variant.price)
+      expect(new_variant).to receive(:currency=).with(variant.currency)
 
-      image.attachment.should_receive(:clone).and_return(image.attachment)
+      expect(image.attachment).to receive(:clone).and_return(image.attachment)
 
-      new_image.should_receive(:assign_attributes).
+      expect(new_image).to receive(:assign_attributes).
         with(attachment: image.attachment).
         and_return(new_image)
 
-      new_property.should_receive(:created_at=).with(nil)
-      new_property.should_receive(:updated_at=).with(nil)
+      expect(new_property).to receive(:created_at=).with(nil)
+      expect(new_property).to receive(:updated_at=).with(nil)
 
       duplicator.duplicate
     end