diff --git a/app/models/spree/stock/adjuster.rb b/app/models/spree/stock/adjuster.rb
index 91e38ed345..4926e8a7e6 100644
--- a/app/models/spree/stock/adjuster.rb
+++ b/app/models/spree/stock/adjuster.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Used by Prioritizer to adjust item quantities
 # see prioritizer_spec for use cases
 module Spree
@@ -21,7 +23,7 @@ module Spree
       end
 
       def fulfilled?
-        @need == 0
+        @need.zero?
       end
     end
   end
diff --git a/app/models/spree/stock/prioritizer.rb b/app/models/spree/stock/prioritizer.rb
index cdef38e043..41ef339702 100644
--- a/app/models/spree/stock/prioritizer.rb
+++ b/app/models/spree/stock/prioritizer.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 module Spree
   module Stock
     class Prioritizer
       attr_reader :packages, :order
 
-      def initialize(order, packages, adjuster_class=Adjuster)
+      def initialize(order, packages, adjuster_class = Adjuster)
         @order = order
         @packages = packages
         @adjuster_class = adjuster_class
@@ -17,6 +19,7 @@ module Spree
       end
 
       private
+
       def adjust_packages
         order.line_items.each do |line_item|
           adjuster = @adjuster_class.new(line_item.variant, line_item.quantity, :on_hand)
@@ -40,7 +43,7 @@ module Spree
       end
 
       def prune_packages
-        packages.reject! { |pkg| pkg.empty? }
+        packages.reject!(&:empty?)
       end
     end
   end
diff --git a/spec/models/spree/stock/prioritizer_spec.rb b/spec/models/spree/stock/prioritizer_spec.rb
index 52ce3ae97e..c038a6dfeb 100644
--- a/spec/models/spree/stock/prioritizer_spec.rb
+++ b/spec/models/spree/stock/prioritizer_spec.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'spec_helper'
 
 module Spree
@@ -57,7 +59,7 @@ module Spree
       end
 
       it '1st has some, 2nd has remaining' do
-        order.line_items[0].stub(:quantity => 5)
+        order.line_items[0].stub(quantity: 5)
         package1 = pack do |package|
           package.add variant1, 2, :on_hand
         end
@@ -74,7 +76,7 @@ module Spree
       end
 
       it '1st has backorder, 2nd has some' do
-        order.line_items[0].stub(:quantity => 5)
+        order.line_items[0].stub(quantity: 5)
         package1 = pack do |package|
           package.add variant1, 5, :backordered
         end
@@ -91,7 +93,7 @@ module Spree
       end
 
       it '1st has backorder, 2nd has all' do
-        order.line_items[0].stub(:quantity => 5)
+        order.line_items[0].stub(quantity: 5)
         package1 = pack do |package|
           package.add variant1, 3, :backordered
           package.add variant2, 1, :on_hand