diff --git a/.gitignore b/.gitignore
index b2c9314..62b6599 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ nbproject
 *.swp
 spec/dummy
 Gemfile.lock
+coverage
diff --git a/.ruby-version b/.ruby-version
index b1b25a5..437459c 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.2.2
+2.5.0
diff --git a/Gemfile b/Gemfile
index 80c1889..a25604e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,6 +14,8 @@ group :development, :test do
   gem 'i18n-tasks', '~> 0.9' if branch == 'master'
 end
 
+gem 'simplecov', require: false, group: :test
+
 gem 'mysql2'
 gem 'sqlite3'
 gem 'pg'
diff --git a/app/controllers/spree/admin/orders_controller_decorator.rb b/app/controllers/spree/admin/orders_controller_decorator.rb
deleted file mode 100644
index c772b9b..0000000
--- a/app/controllers/spree/admin/orders_controller_decorator.rb
+++ /dev/null
@@ -1,32 +0,0 @@
-module SolidusShipwire
-  module ShipwireController
-    def self.prepended(base)
-      base.before_action :load_shipwire_order, only: [:shipwire]
-    end
-
-    def shipwire
-      order_to_shipwire
-
-      respond_to do |format|
-        format.html
-        format.js
-      end
-    end
-
-    private
-
-    def order_to_shipwire
-      @shipwire_data = @order.in_shipwire
-    rescue ResponseException => e
-      @error = e.response
-    rescue RuntimeError => e
-      @error = e.message
-    end
-
-    def load_shipwire_order
-      load_order
-    end
-  end
-end
-
-Spree::Admin::OrdersController.prepend SolidusShipwire::ShipwireController
diff --git a/app/controllers/spree/admin/return_authorizations_controller_decorator.rb b/app/controllers/spree/admin/return_authorizations_controller_decorator.rb
deleted file mode 100644
index ad260e6..0000000
--- a/app/controllers/spree/admin/return_authorizations_controller_decorator.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-module SolidusShipwire
-  module ShipwireReturnAuthorizationsController
-    def self.prepended(base)
-      base.after_action :flash_message, only: [:create]
-    end
-
-    private
-
-    def flash_message
-      message = @return_authorization.errors.messages[:shipwire]
-      return unless message
-      flash[:error] = message
-    end
-  end
-end
-
-Spree::Admin::ReturnAuthorizationsController.prepend SolidusShipwire::ShipwireReturnAuthorizationsController
diff --git a/app/models/variant_decorator.rb b/app/models/variant_decorator.rb
index 57c7b50..90aa5d7 100644
--- a/app/models/variant_decorator.rb
+++ b/app/models/variant_decorator.rb
@@ -5,10 +5,6 @@ def self.prepended(base)
                                 serializer: SolidusShipwire::VariantSerializer
     end
 
-    def update_stocks_from_shipwire
-      Shipwire::Stock.new.list( sku: self.sku)
-    end
-
     Spree::Variant.prepend self
   end
 end
diff --git a/app/views/spree/admin/orders/_shipwire_data.html.erb b/app/views/spree/admin/orders/_shipwire_data.html.erb
deleted file mode 100644
index 9b27a54..0000000
--- a/app/views/spree/admin/orders/_shipwire_data.html.erb
+++ /dev/null
@@ -1,31 +0,0 @@
-<fieldset class="no-border-bottom">
-    <legend><%= title %></legend>
-    <table>
-      <thead>
-        <tr>
-          <th><%= Spree::Adjustment.human_attribute_name(:name)%></th>
-          <th><%= Spree::Adjustment.human_attribute_name(:value)%></th>
-        </tr>
-      </thead>
-      <tbody id="order-charges" data-hook="order_details_adjustments"  class="with-border">
-        <tr class="total">
-          <td><strong><%= t 'shipwire.status' %>:</strong></td>
-          <td class="total align-center">
-            <span><%= @shipwire_data.status %></span>
-          </td>
-        </tr>
-        <tr class="total">
-          <td><strong><%= t 'shipwire.ship_to' %>:</strong></td>
-          <td class="total align-center">
-            <span><%= @shipwire_data.ship_to %></span>
-          </td>
-        </tr>
-        <tr class="total">
-          <td><strong><%= t 'shipwire.ship_from' %>:</strong></td>
-          <td class="total align-center">
-            <span><%= @shipwire_data.ship_from %></span>
-          </td>
-        </tr>
-      </tbody>
-    </table>
-  </fieldset>
diff --git a/app/views/spree/admin/orders/_shipwire_error.html.erb b/app/views/spree/admin/orders/_shipwire_error.html.erb
deleted file mode 100644
index 19a2de9..0000000
--- a/app/views/spree/admin/orders/_shipwire_error.html.erb
+++ /dev/null
@@ -1,18 +0,0 @@
-<% if @error.kind_of? String %>
-  <p><%= @error %></p>
-<% elsif @error.kind_of?(Shipwire::Response) && @error.has_validation_errors? %>
-  <p>Validation error</p>
-  <ul>
-    <% if @error.validation_errors.kind_of? Array %>
-      <% @error.validation_errors.each do |value| %>
-        <li><%= value['message'] %></li>
-      <% end %>
-    <% else %>
-      <% @error.validation_errors.each do |key, value| %>
-       <% value['message'].each do |_k, message| %>
-          <li><%= key %> - <%= message.values.join(',') %></li>
-        <% end %>
-      <% end %>
-    <% end %>
-  </ul>
-<% end %>
diff --git a/app/views/spree/admin/orders/shipwire.html.erb b/app/views/spree/admin/orders/shipwire.html.erb
deleted file mode 100644
index 510c2b0..0000000
--- a/app/views/spree/admin/orders/shipwire.html.erb
+++ /dev/null
@@ -1,39 +0,0 @@
-<% content_for :page_actions do %>
-  <% if can?(:fire, @order) %>
-    <li><%= event_links %></li>
-  <% end %>
-  <% if can?(:resend, @order) && @order.completed? %>
-    <li><%= button_link_to Spree.t(:resend), resend_admin_order_url(@order), :method => :post, :icon => 'email' %></li>
-  <% end %>
-  <% if can?(:admin, Spree::Order) %>
-    <li><%= button_link_to Spree.t(:back_to_orders_list), admin_orders_path, :icon => 'arrow-left' %></li>
-  <% end %>
-<% end %>
-
-<%= render :partial => 'spree/admin/shared/order_tabs', :locals => { :current => 'Shipwire' } %>
-
-<div data-hook="admin_order_edit_header">
-  <%= render :partial => 'spree/shared/error_messages', :locals => { :target => @order } %>
-</div>
-
-<div data-hook="admin_order_shipwire_form">
-  <div id="order-form-shipwire">
-    <div id="errors" class="alert alert-danger <%= 'hidden' if @error.nil? %>" data-hook="">
-      <%= render partial: 'spree/admin/orders/shipwire_error', error: @error %>
-    </div>
-    <% if @order.shipwire_id.nil? %>
-      <%= link_to Spree.t(:sync_with_shipwire), shipwire_admin_order_url(@order), id: :retry_shipwire, remote: true %>
-    <% end %>
-    <div id='shipwire_data'>
-      <% unless @order.shipwire_id.nil? %>
-        <%= render partial: 'spree/admin/orders/shipwire_data', shipwire_data: @shipwire_data %>
-      <% end %>
-    </div>
-  </div>
-</div>
-
-<%= javascript_tag do -%>
-$('#retry_shipwire').bind('ajax:beforeSend', function() {
-  $('#errors').hide()
-});
-<% end %>
diff --git a/app/views/spree/admin/orders/shipwire.js.erb b/app/views/spree/admin/orders/shipwire.js.erb
deleted file mode 100644
index bca33a4..0000000
--- a/app/views/spree/admin/orders/shipwire.js.erb
+++ /dev/null
@@ -1,7 +0,0 @@
-<% if @error.nil? %>
-  $('#errors').hide()
-  $('#shipwire_data').html("<%= escape_javascript(render partial: 'spree/admin/orders/shipwire_data', shipwire_data: @shipwire_data) %>")
-<% else %>
-  $('#errors').show()
-  $('#errors').html("<%= escape_javascript(render partial: 'spree/admin/orders/shipwire_error', error: @error) %>")
-<% end %>
diff --git a/config/routes.rb b/config/routes.rb
index 54b2e1d..900573f 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,19 +1,7 @@
 Spree::Core::Engine.routes.draw do
-  # Add your extension routes here
-
-  Spree::Core::Engine.routes.draw do
-    namespace :admin do
-      resources :orders, except: [:show] do
-        member do
-          get :shipwire
-        end
-      end
-    end
-
-    namespace :api, defaults: { format: 'json' } do
-      resources :shipments do
-        resources :rates, only: [:index], module: :shipwire
-      end
+  namespace :api, defaults: { format: 'json' } do
+    resources :shipments do
+      resources :rates, only: [:index], module: :shipwire
     end
   end
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 3adcdd9..5153abe 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,6 +1,9 @@
 # Configure Rails Environment
 ENV['RAILS_ENV'] = 'test'
 
+require 'simplecov'
+SimpleCov.start 'rails'
+
 begin
   require File.expand_path('../dummy/config/environment', __FILE__)
 rescue LoadError