diff --git a/.rubocop.yml b/.rubocop.yml
index 8f8ebda37..545e1c1fa 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -7,12 +7,14 @@ AllCops:
   Exclude:
     - 'db/schema.rb'
     - 'vendor/**/*'
+  TargetRailsVersion: 4.0
 
 Rails:
   Enabled: true
 
 Style/FileName:
   Exclude:
+    - 'Guardfile'
     - 'Gemfile'
     - 'Gemfile.lock'
 
@@ -26,12 +28,12 @@ Style/PercentLiteralDelimiters:
     '%i': ()
     '%w': ()
 
-Style/MultilineMethodCallIndentation:
+Layout/MultilineMethodCallIndentation:
   EnforcedStyle: indented
 
 # Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
 # SupportedStyles: with_first_parameter, with_fixed_indentation
-Style/AlignParameters:
+Layout/AlignParameters:
   EnforcedStyle: with_fixed_indentation
 
 Metrics/LineLength:
diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 211de1ca6..4e0d899c7 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config --no-offense-counts`
-# on 2017-11-05 20:41:45 +1300 using RuboCop version 0.47.1.
+# on 2017-12-06 11:20:15 +1300 using RuboCop version 0.49.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -18,12 +18,6 @@ Lint/UnusedMethodArgument:
     - 'app/controllers/passwords_controller.rb'
     - 'app/controllers/registrations_controller.rb'
     - 'app/validators/approved_validator.rb'
-    - 'spec/views/plantings/show.html.haml_spec.rb'
-
-# Cop supports --auto-correct.
-Performance/StringReplacement:
-  Exclude:
-    - 'spec/rails_helper.rb'
 
 Rails/FilePath:
   Exclude:
@@ -62,37 +56,6 @@ Style/AsciiComments:
   Exclude:
     - 'config/initializers/comfortable_mexican_sofa.rb'
 
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: percent_q, bare_percent
-Style/BarePercentLiterals:
-  Exclude:
-    - 'app/helpers/auto_suggest_helper.rb'
-    - 'spec/support/feature_helpers.rb'
-
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, ProceduralMethods, FunctionalMethods, IgnoredMethods.
-# SupportedStyles: line_count_based, semantic, braces_for_chaining
-# ProceduralMethods: benchmark, bm, bmbm, create, each_with_object, measure, new, realtime, tap, with_object
-# FunctionalMethods: let, let!, subject, watch
-# IgnoredMethods: lambda, proc, it
-Style/BlockDelimiters:
-  Exclude:
-    - 'spec/controllers/order_items_controller_spec.rb'
-    - 'spec/features/notifications_spec.rb'
-    - 'spec/models/ability_spec.rb'
-    - 'spec/models/comment_spec.rb'
-    - 'spec/models/follow_spec.rb'
-    - 'spec/models/member_spec.rb'
-    - 'spec/models/post_spec.rb'
-    - 'spec/views/crops/edit.html.haml_spec.rb'
-
-# Cop supports --auto-correct.
-Style/BlockEndNewline:
-  Exclude:
-    - 'spec/models/ability_spec.rb'
-    - 'spec/models/member_spec.rb'
-
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 # SupportedStyles: nested, compact
 Style/ClassAndModuleChildren:
@@ -101,38 +64,10 @@ Style/ClassAndModuleChildren:
     - 'lib/actions/oauth_signup_action.rb'
     - 'lib/haml/filters/escaped_markdown.rb'
 
-# Cop supports --auto-correct.
-Style/ColonMethodCall:
-  Exclude:
-    - 'spec/lib/haml/filters/escaped_markdown_spec.rb'
-    - 'spec/lib/haml/filters/growstuff_markdown_spec.rb'
-
-# Cop supports --auto-correct.
-Style/EachForSimpleLoop:
-  Exclude:
-    - 'spec/models/crop_spec.rb'
-    - 'spec/views/home/_crops.html.haml_spec.rb'
-
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: format, sprintf, percent
-Style/FormatString:
-  Exclude:
-    - 'app/helpers/application_helper.rb'
-    - 'spec/helpers/application_helper_spec.rb'
-    - 'spec/views/shop/index_spec.rb'
-
 Style/IdenticalConditionalBranches:
   Exclude:
     - 'app/controllers/follows_controller.rb'
 
-# Cop supports --auto-correct.
-# Configuration parameters: MaxLineLength.
-Style/IfUnlessModifier:
-  Exclude:
-    - 'app/helpers/crops_helper.rb'
-    - 'config/initializers/geocoder.rb'
-    - 'lib/tasks/growstuff.rake'
-
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 # SupportedStyles: line_count_dependent, lambda, literal
@@ -146,32 +81,11 @@ Style/MultilineIfModifier:
   Exclude:
     - 'spec/rails_helper.rb'
 
-Style/MultilineTernaryOperator:
-  Exclude:
-    - 'app/controllers/order_items_controller.rb'
-
 # Cop supports --auto-correct.
 Style/MutableConstant:
   Exclude:
     - 'app/models/planting.rb'
 
-# Cop supports --auto-correct.
-Style/NegatedIf:
-  Exclude:
-    - 'app/helpers/crops_helper.rb'
-
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
-# SupportedStyles: skip_modifier_ifs, always
-Style/Next:
-  Exclude:
-    - 'lib/tasks/growstuff.rake'
-
-# Cop supports --auto-correct.
-Style/NilComparison:
-  Exclude:
-    - 'lib/tasks/growstuff.rake'
-
 # Cop supports --auto-correct.
 # Configuration parameters: AutoCorrect, EnforcedStyle, SupportedStyles.
 # SupportedStyles: predicate, comparison
@@ -187,14 +101,6 @@ Style/ParallelAssignment:
   Exclude:
     - 'app/mailers/notifier.rb'
 
-# Cop supports --auto-correct.
-# Configuration parameters: PreferredDelimiters.
-Style/PercentLiteralDelimiters:
-  Exclude:
-    - 'app/helpers/auto_suggest_helper.rb'
-    - 'spec/features/signin_spec.rb'
-    - 'spec/features/signout_spec.rb'
-
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles, AllowInnerSlashes.
 # SupportedStyles: slashes, percent_r, mixed
@@ -205,23 +111,3 @@ Style/RegexpLiteral:
     - 'spec/views/devise/registrations/edit_spec.rb'
     - 'spec/views/members/index.html.haml_spec.rb'
     - 'spec/views/posts/index.html.haml_spec.rb'
-
-# Cop supports --auto-correct.
-# Configuration parameters: SupportedStyles.
-# SupportedStyles: use_perl_names, use_english_names
-Style/SpecialGlobalVars:
-  EnforcedStyle: use_perl_names
-
-# Cop supports --auto-correct.
-# Configuration parameters: IgnoredMethods.
-# IgnoredMethods: respond_to, define_method
-Style/SymbolProc:
-  Exclude:
-    - 'lib/tasks/growstuff.rake'
-
-# Cop supports --auto-correct.
-# Configuration parameters: SupportedStyles, WordRegex.
-# SupportedStyles: percent, brackets
-Style/WordArray:
-  EnforcedStyle: percent
-  MinSize: 4
diff --git a/Gemfile b/Gemfile
index 36a8608c0..c5d5d1fe1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,5 @@
 # frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 ruby '2.4.1'
@@ -46,8 +47,8 @@ gem 'comfortable_mexican_sofa'     # content management system
 gem 'bootstrap-kaminari-views'     # bootstrap views for kaminari
 gem 'kaminari'                     # pagination
 
-gem 'activemerchant'
 gem 'active_utils'
+gem 'activemerchant'
 gem 'sidekiq'
 
 # Markdown formatting for updates etc
@@ -144,7 +145,7 @@ group :development, :test do
   gem 'rainbow', '< 2.2.0' # See https://github.com/sickill/rainbow/issues/44
   gem 'rspec-activemodel-mocks'
   gem 'rspec-rails' # unit testing framework
-  gem 'rubocop', '<= 0.47.1', require: false # Pin to rubocop (0.47.1) as 0.48.0 is buggy
+  gem 'rubocop'
   gem 'selenium-webdriver'
   gem 'webrat' # provides HTML matchers for view tests
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 7042c04c2..e3f9bf48f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -366,6 +366,7 @@ GEM
       cocaine (~> 0.5.5)
       mime-types
       mimemagic (~> 0.3.0)
+    parallel (1.12.0)
     parser (2.4.0.2)
       ast (~> 2.3)
     pg (0.21.0)
@@ -461,7 +462,8 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.0)
-    rubocop (0.47.1)
+    rubocop (0.49.1)
+      parallel (~> 1.10)
       parser (>= 2.3.3.1, < 3.0)
       powerpack (~> 0.1)
       rainbow (>= 1.99.1, < 3.0)
@@ -623,7 +625,7 @@ DEPENDENCIES
   responders
   rspec-activemodel-mocks
   rspec-rails
-  rubocop (<= 0.47.1)
+  rubocop
   ruby-units
   sass-rails
   selenium-webdriver
diff --git a/Guardfile b/Guardfile
index edc8164d3..4b5f3ccb5 100644
--- a/Guardfile
+++ b/Guardfile
@@ -1,13 +1,13 @@
 guard :rspec,
-      cmd: 'bundle exec rspec --format documentation',
-      failed_mode: :keep do
+  cmd: 'bundle exec rspec --format documentation',
+  failed_mode: :keep do
   watch(%r{^spec/.+_spec\.rb$})
   watch(%r{^lib/(.+)\.rb$}) { |m| "spec/libs/#{m[1]}_spec.rb" }
-  watch('spec/spec_helper.rb')  { "spec" }
+  watch('spec/spec_helper.rb') { "spec" }
 
   # Rails example
   watch(%r{^app/(.+)\.rb$})                           { |m| "spec/#{m[1]}_spec.rb" }
   watch(%r{^app/(.*)(\.erb|\.haml|\.slim)$})          { |m| "spec/#{m[1]}#{m[2]}_spec.rb" }
   watch(%r{^spec/support/(.+)\.rb$})                  { "spec" }
   watch('config/routes.rb')                           { "spec/routing" }
-end
\ No newline at end of file
+end
diff --git a/Rakefile b/Rakefile
old mode 100644
new mode 100755
diff --git a/app/controllers/alternate_names_controller.rb b/app/controllers/alternate_names_controller.rb
index b673a63d7..0f1471a8c 100644
--- a/app/controllers/alternate_names_controller.rb
+++ b/app/controllers/alternate_names_controller.rb
@@ -1,5 +1,5 @@
 class AlternateNamesController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :show]
+  before_action :authenticate_member!, except: %i(index show)
   load_and_authorize_resource
   respond_to :html, :json
   responders :flash
diff --git a/app/controllers/comments_controller.rb b/app/controllers/comments_controller.rb
index f85302d74..389efb825 100644
--- a/app/controllers/comments_controller.rb
+++ b/app/controllers/comments_controller.rb
@@ -1,5 +1,5 @@
 class CommentsController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :show]
+  before_action :authenticate_member!, except: %i(index show)
   load_and_authorize_resource
   respond_to :html, :json
   respond_to :rss, only: :index
diff --git a/app/controllers/crops_controller.rb b/app/controllers/crops_controller.rb
index ffb5c49a1..3df1a7ca7 100644
--- a/app/controllers/crops_controller.rb
+++ b/app/controllers/crops_controller.rb
@@ -1,9 +1,9 @@
 require 'will_paginate/array'
 
 class CropsController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :hierarchy, :search, :show]
+  before_action :authenticate_member!, except: %i(index hierarchy search show)
   load_and_authorize_resource
-  skip_authorize_resource only: [:hierarchy, :search]
+  skip_authorize_resource only: %i(hierarchy search)
   respond_to :html, :json, :rss, :csv
   responders :flash
 
@@ -134,7 +134,7 @@ class CropsController < ApplicationController
   end
 
   def recreate_names(param_name, name_type)
-    return unless params[param_name].present?
+    return if params[param_name].blank?
     destroy_names(name_type)
     params[param_name].each do |_i, value|
       create_name!(name_type, value) unless value.empty?
@@ -159,9 +159,9 @@ class CropsController < ApplicationController
       :request_notes,
       :reason_for_rejection,
       :rejection_notes,
-      scientific_names_attributes: [:scientific_name,
-                                    :_destroy,
-                                    :id])
+      scientific_names_attributes: %i(scientific_name
+                                      _destroy
+                                      id))
   end
 
   def filename
@@ -173,7 +173,7 @@ class CropsController < ApplicationController
       include: {
         plantings: {
           include: {
-            owner: { only: [:id, :login_name, :location, :latitude, :longitude] }
+            owner: { only: %i(id login_name location latitude longitude) }
           }
         },
         scientific_names: { only: [:name] },
diff --git a/app/controllers/gardens_controller.rb b/app/controllers/gardens_controller.rb
index 6b345dc70..ede5c2602 100644
--- a/app/controllers/gardens_controller.rb
+++ b/app/controllers/gardens_controller.rb
@@ -1,6 +1,6 @@
 class GardensController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :show]
-  after_action :expire_homepage, only: [:create, :delete]
+  before_action :authenticate_member!, except: %i(index show)
+  after_action :expire_homepage, only: %i(create delete)
   load_and_authorize_resource
   respond_to :html, :json
 
diff --git a/app/controllers/members_controller.rb b/app/controllers/members_controller.rb
index 1353a8720..c346eb8e3 100644
--- a/app/controllers/members_controller.rb
+++ b/app/controllers/members_controller.rb
@@ -1,6 +1,6 @@
 class MembersController < ApplicationController
-  load_and_authorize_resource except: [:finish_signup, :unsubscribe, :view_follows, :view_followers, :show]
-  skip_authorize_resource only: [:nearby, :unsubscribe, :finish_signup]
+  load_and_authorize_resource except: %i(finish_signup unsubscribe view_follows view_followers show)
+  skip_authorize_resource only: %i(nearby unsubscribe finish_signup)
   respond_to :html, :json, :rss
   after_action :expire_homepage, only: :create
 
@@ -62,7 +62,6 @@ class MembersController < ApplicationController
     @member.update(@type => false)
 
     flash.now[:notice] = I18n.t('members.unsubscribed', email_type: EMAIL_TYPE_STRING[@type])
-
   rescue ActiveSupport::MessageVerifier::InvalidSignature
     flash.now[:alert] = I18n.t('members.unsubscribe.error')
   end
@@ -88,11 +87,11 @@ class MembersController < ApplicationController
   end
 
   def member_json_fields
-    [
-      :id, :login_name,
-      :slug, :bio, :created_at,
-      :location, :latitude, :longitude
-    ]
+    %i(
+      id login_name
+      slug bio created_at
+      location latitude longitude
+    )
   end
 
   def members
diff --git a/app/controllers/omniauth_callbacks_controller.rb b/app/controllers/omniauth_callbacks_controller.rb
index afb56d3db..3d642cd3d 100644
--- a/app/controllers/omniauth_callbacks_controller.rb
+++ b/app/controllers/omniauth_callbacks_controller.rb
@@ -30,7 +30,7 @@ class OmniauthCallbacksController < Devise::OmniauthCallbacksController
     @authentication = action.establish_authentication(auth, member)
 
     if action.member_created?
-      raise "Invalid provider" unless ['facebook', 'twitter', 'flickr'].index(auth['provider'].to_s)
+      raise "Invalid provider" unless %w(facebook twitter flickr).index(auth['provider'].to_s)
 
       session["devise.#{auth['provider']}_data"] = request.env["omniauth.auth"]
       sign_in member
diff --git a/app/controllers/photos_controller.rb b/app/controllers/photos_controller.rb
index 1f091b19b..18e95302b 100644
--- a/app/controllers/photos_controller.rb
+++ b/app/controllers/photos_controller.rb
@@ -1,6 +1,6 @@
 class PhotosController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :show]
-  after_action :expire_homepage, only: [:create, :delete]
+  before_action :authenticate_member!, except: %i(index show)
+  after_action :expire_homepage, only: %i(create delete)
   load_and_authorize_resource
   respond_to :html, :json
   responders :flash
diff --git a/app/controllers/places_controller.rb b/app/controllers/places_controller.rb
index cf821e32b..4586b5d39 100644
--- a/app/controllers/places_controller.rb
+++ b/app/controllers/places_controller.rb
@@ -7,9 +7,9 @@ class PlacesController < ApplicationController
       format.html
       # json response is whatever we want to map here
       format.json do
-        render json: Member.located.to_json(only: [
-                                              :id, :login_name, :slug, :location, :latitude, :longitude
-                                            ])
+        render json: Member.located.to_json(only: %i(
+                                              id login_name slug location latitude longitude
+                                            ))
       end
     end
   end
@@ -22,9 +22,9 @@ class PlacesController < ApplicationController
     respond_to do |format|
       format.html # show.html.haml
       format.json do
-        render json: @nearby_members.to_json(only: [
-                                               :id, :login_name, :slug, :location, :latitude, :longitude
-                                             ])
+        render json: @nearby_members.to_json(only: %i(
+                                               id login_name slug location latitude longitude
+                                             ))
       end
     end
   end
diff --git a/app/controllers/posts_controller.rb b/app/controllers/posts_controller.rb
index 287ef6f2a..47aa6bd18 100644
--- a/app/controllers/posts_controller.rb
+++ b/app/controllers/posts_controller.rb
@@ -1,8 +1,8 @@
 class PostsController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :show]
+  before_action :authenticate_member!, except: %i(index show)
   load_and_authorize_resource
   respond_to :html, :json
-  respond_to :rss, only: [:index, :show]
+  respond_to :rss, only: %i(index show)
 
   # GET /posts
   # GET /posts.json
diff --git a/app/controllers/scientific_names_controller.rb b/app/controllers/scientific_names_controller.rb
index 954a94dbc..cf58fd4f7 100644
--- a/app/controllers/scientific_names_controller.rb
+++ b/app/controllers/scientific_names_controller.rb
@@ -1,5 +1,5 @@
 class ScientificNamesController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :show]
+  before_action :authenticate_member!, except: %i(index show)
   load_and_authorize_resource
   respond_to :html, :json
   responders :flash
diff --git a/app/controllers/seeds_controller.rb b/app/controllers/seeds_controller.rb
index f21b1b61a..f7cf530eb 100644
--- a/app/controllers/seeds_controller.rb
+++ b/app/controllers/seeds_controller.rb
@@ -1,5 +1,5 @@
 class SeedsController < ApplicationController
-  before_action :authenticate_member!, except: [:index, :show]
+  before_action :authenticate_member!, except: %i(index show)
   load_and_authorize_resource
   respond_to :html, :json
   respond_to :csv, only: :index
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 2fde0fcf8..639d27686 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,11 +1,11 @@
 module ApplicationHelper
   def price_in_dollars(price)
-    sprintf('%.2f', price / 100.0)
+    format('%.2f', price / 100.0)
   end
 
   # 999 cents becomes 9.99 AUD -- for products/orders/etc
   def price_with_currency(price)
-    sprintf('%.2f %s', price / 100.0, Growstuff::Application.config.currency)
+    format('%.2f %s', price / 100.0, Growstuff::Application.config.currency)
   end
 
   def parse_date(str)
diff --git a/app/helpers/auto_suggest_helper.rb b/app/helpers/auto_suggest_helper.rb
index a8a86de56..caa0cd7ff 100644
--- a/app/helpers/auto_suggest_helper.rb
+++ b/app/helpers/auto_suggest_helper.rb
@@ -11,7 +11,7 @@ module AutoSuggestHelper
     resource = resource.class.name.downcase
     source_path = Rails.application.routes.url_helpers.send("#{source}s_search_path")
 
-    %Q{
+    %(
       <input id="#{source}" class="auto-suggest #{options[:class]}"
         type="text" value="#{default}" data-source-url="#{source_path}",
         placeholder="e.g. lettuce">
@@ -20,6 +20,6 @@ module AutoSuggestHelper
       </noscript>
       <input id="#{resource}_#{source}_id" class="auto-suggest-id"
         type="hidden" name="#{resource}[#{source}_id]" value="#{default_id}">
-    }.html_safe
+    ).html_safe
   end
 end
diff --git a/app/helpers/crops_helper.rb b/app/helpers/crops_helper.rb
index c4dc00c0c..b99d687aa 100644
--- a/app/helpers/crops_helper.rb
+++ b/app/helpers/crops_helper.rb
@@ -8,9 +8,7 @@ module CropsHelper
       total_quantity += seed.quantity if seed.quantity
     end
 
-    if !seeds.any?
-      return "You don't have any seeds of this crop."
-    end
+    return "You don't have any seeds of this crop." if seeds.none?
 
     if total_quantity != 0
       "You have #{total_quantity} #{Seed.model_name.human(count: total_quantity)} of this crop."
diff --git a/app/helpers/harvests_helper.rb b/app/helpers/harvests_helper.rb
index 55aa92a2e..14277817b 100644
--- a/app/helpers/harvests_helper.rb
+++ b/app/helpers/harvests_helper.rb
@@ -15,7 +15,7 @@ module HarvestsHelper
 
     if harvest.unit == 'individual' # just the number
       number_to_human(harvest.quantity, strip_insignificant_zeros: true)
-    elsif !harvest.unit.blank? # pluralize anything else
+    elsif harvest.unit.present? # pluralize anything else
       pluralize(number_to_human(harvest.quantity, strip_insignificant_zeros: true), harvest.unit)
     else
       "#{number_to_human(harvest.quantity, strip_insignificant_zeros: true)} #{harvest.unit}"
diff --git a/app/helpers/plantings_helper.rb b/app/helpers/plantings_helper.rb
index b8e2b257c..f71dc8158 100644
--- a/app/helpers/plantings_helper.rb
+++ b/app/helpers/plantings_helper.rb
@@ -10,11 +10,11 @@ module PlantingsHelper
   end
 
   def display_planted_from(planting)
-    !planting.planted_from.blank? ? planting.planted_from : "not specified"
+    planting.planted_from.present? ? planting.planted_from : "not specified"
   end
 
   def display_planting_quantity(planting)
-    !planting.quantity.blank? ? planting.quantity : "not specified"
+    planting.quantity.present? ? planting.quantity : "not specified"
   end
 
   def display_planting(planting)
diff --git a/app/models/crop.rb b/app/models/crop.rb
index c3d4d7c7b..15787f6f1 100644
--- a/app/models/crop.rb
+++ b/app/models/crop.rb
@@ -1,6 +1,6 @@
 class Crop < ActiveRecord::Base
   extend FriendlyId
-  friendly_id :name, use: [:slugged, :finders]
+  friendly_id :name, use: %i(slugged finders)
 
   ##
   ## Triggers
diff --git a/app/models/csv_importer.rb b/app/models/csv_importer.rb
index dadff9978..66297b13c 100644
--- a/app/models/csv_importer.rb
+++ b/app/models/csv_importer.rb
@@ -34,7 +34,7 @@ class CsvImporter
 
   def add_scientific_names(scientific_names)
     names_to_add = []
-    if !scientific_names.blank? # i.e. we actually passed something in, which isn't a given
+    if scientific_names.present? # i.e. we actually passed something in, which isn't a given
       names_to_add = scientific_names.split(/,\s*/)
     elsif @crop.parent && !@crop.parent.scientific_names.empty? # pick up from parent
       names_to_add = @crop.parent.scientific_names.map(&:name)
diff --git a/app/models/seed.rb b/app/models/seed.rb
index 4213a7886..56c9f809d 100644
--- a/app/models/seed.rb
+++ b/app/models/seed.rb
@@ -1,7 +1,7 @@
 class Seed < ActiveRecord::Base
   extend FriendlyId
   include PhotoCapable
-  friendly_id :seed_slug, use: [:slugged, :finders]
+  friendly_id :seed_slug, use: %i(slugged finders)
 
   TRADABLE_TO_VALUES = %w(nowhere locally nationally internationally).freeze
   ORGANIC_VALUES = ['certified organic', 'non-certified organic', 'conventional/non-organic', 'unknown'].freeze
diff --git a/config/initializers/devise.rb b/config/initializers/devise.rb
index ad33e335d..ec28eb983 100644
--- a/config/initializers/devise.rb
+++ b/config/initializers/devise.rb
@@ -43,7 +43,7 @@ Devise.setup do |config|
   # Configure which authentication keys should have whitespace stripped.
   # These keys will have whitespace before and after removed upon creating or
   # modifying a user and when used to authenticate or find a user. Default is :email.
-  config.strip_whitespace_keys = [:email, :login_name]
+  config.strip_whitespace_keys = %i(email login_name)
 
   # Tell if authentication through request.params is enabled. True by default.
   # It can be set to an array that will enable params authentication only for the
diff --git a/config/initializers/geocoder.rb b/config/initializers/geocoder.rb
index 67ce37799..afe41f574 100644
--- a/config/initializers/geocoder.rb
+++ b/config/initializers/geocoder.rb
@@ -11,6 +11,4 @@ Geocoder.configure(
 )
 # This configuration takes precedence over environment/test.rb
 # Reported as https://github.com/alexreisner/geocoder/issues/509
-if Geocoder.config.lookup != :test
-  Geocoder.configure(lookup: :nominatim)
-end
+Geocoder.configure(lookup: :nominatim) if Geocoder.config.lookup != :test
diff --git a/config/routes.rb b/config/routes.rb
index 30327901b..1f22a521a 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -12,14 +12,14 @@ Growstuff::Application.routes.draw do
   devise_scope :member do
     get '/members/unsubscribe/:message' => 'members#unsubscribe', :as => 'unsubscribe_member'
   end
-  match '/members/:id/finish_signup' => 'members#finish_signup', via: [:get, :patch], :as => :finish_signup
+  match '/members/:id/finish_signup' => 'members#finish_signup', via: %i(get patch), :as => :finish_signup
 
   resources :members
 
   resources :photos
   delete 'photo_associations' => 'photo_associations#destroy'
 
-  resources :authentications, only: [:create, :destroy]
+  resources :authentications, only: %i(create destroy)
 
   resources :plantings do
     resources :harvests
@@ -59,7 +59,7 @@ Growstuff::Application.routes.draw do
     get 'reply', on: :member
   end
 
-  resources :follows, only: [:create, :destroy]
+  resources :follows, only: %i(create destroy)
   get '/members/:login_name/follows' => 'members#view_follows', :as => 'member_follows'
   get '/members/:login_name/followers' => 'members#view_followers', :as => 'member_followers'
 
@@ -78,7 +78,7 @@ Growstuff::Application.routes.draw do
   resources :order_items
   resources :products
 
-  resources :likes, only: [:create, :destroy]
+  resources :likes, only: %i(create destroy)
 
   get "home/index"
   root to: 'home#index'
diff --git a/db/migrate/20121109130033_add_creation_index_to_updates.rb b/db/migrate/20121109130033_add_creation_index_to_updates.rb
index 4e3f4c560..46601ef3d 100644
--- a/db/migrate/20121109130033_add_creation_index_to_updates.rb
+++ b/db/migrate/20121109130033_add_creation_index_to_updates.rb
@@ -1,5 +1,5 @@
 class AddCreationIndexToUpdates < ActiveRecord::Migration
   def change
-    add_index :updates, [:created_at, :user_id]
+    add_index :updates, %i(created_at user_id)
   end
 end
diff --git a/db/migrate/20130215131921_rename_notification_fields.rb b/db/migrate/20130215131921_rename_notification_fields.rb
index 3f11af8af..63f52ae6d 100644
--- a/db/migrate/20130215131921_rename_notification_fields.rb
+++ b/db/migrate/20130215131921_rename_notification_fields.rb
@@ -1,6 +1,6 @@
 class RenameNotificationFields < ActiveRecord::Migration
   def change
-    change_table :notifications do |t| # rubocop:disable Rails/ReversibleMigration
+    change_table :notifications do |t|
       t.rename :to_id, :recipient_id
       t.rename :from_id, :sender_id
     end
diff --git a/db/migrate/20140928044231_add_crops_posts_table.rb b/db/migrate/20140928044231_add_crops_posts_table.rb
index 475a993f5..6dcf9a494 100644
--- a/db/migrate/20140928044231_add_crops_posts_table.rb
+++ b/db/migrate/20140928044231_add_crops_posts_table.rb
@@ -4,7 +4,7 @@ class AddCropsPostsTable < ActiveRecord::Migration
       t.integer :crop_id
       t.integer :post_id
     end
-    add_index :crops_posts, [:crop_id, :post_id]
+    add_index :crops_posts, %i(crop_id post_id)
     add_index :crops_posts, :crop_id
   end
 end
diff --git a/db/migrate/20141002022459_create_index_harvest_photos.rb b/db/migrate/20141002022459_create_index_harvest_photos.rb
index 75ef69d36..95913bd04 100644
--- a/db/migrate/20141002022459_create_index_harvest_photos.rb
+++ b/db/migrate/20141002022459_create_index_harvest_photos.rb
@@ -1,5 +1,5 @@
 class CreateIndexHarvestPhotos < ActiveRecord::Migration
   def change
-    add_index(:harvests_photos, [:harvest_id, :photo_id])
+    add_index(:harvests_photos, %i(harvest_id photo_id))
   end
 end
diff --git a/db/migrate/20150127043022_add_gardens_photos_table.rb b/db/migrate/20150127043022_add_gardens_photos_table.rb
index 7e8f8bd81..0c2b99dfe 100644
--- a/db/migrate/20150127043022_add_gardens_photos_table.rb
+++ b/db/migrate/20150127043022_add_gardens_photos_table.rb
@@ -4,6 +4,6 @@ class AddGardensPhotosTable < ActiveRecord::Migration
       t.integer :photo_id
       t.integer :garden_id
     end
-    add_index(:gardens_photos, [:garden_id, :photo_id])
+    add_index(:gardens_photos, %i(garden_id photo_id))
   end
 end
diff --git a/db/migrate/20150201052245_create_cms.rb b/db/migrate/20150201052245_create_cms.rb
index b52816813..e8ba4fb9e 100644
--- a/db/migrate/20150201052245_create_cms.rb
+++ b/db/migrate/20150201052245_create_cms.rb
@@ -33,8 +33,8 @@ class CreateCms < ActiveRecord::Migration
       t.boolean :is_shared,   null: false, default: false
       t.timestamps null: true
     end
-    add_index :comfy_cms_layouts, [:parent_id, :position]
-    add_index :comfy_cms_layouts, [:site_id, :identifier], unique: true
+    add_index :comfy_cms_layouts, %i(parent_id position)
+    add_index :comfy_cms_layouts, %i(site_id identifier), unique: true
 
     # -- Pages --------------------------------------------------------------
     create_table :comfy_cms_pages do |t|
@@ -52,8 +52,8 @@ class CreateCms < ActiveRecord::Migration
       t.boolean :is_shared,       null: false, default: false
       t.timestamps null: true
     end
-    add_index :comfy_cms_pages, [:site_id, :full_path]
-    add_index :comfy_cms_pages, [:parent_id, :position]
+    add_index :comfy_cms_pages, %i(site_id full_path)
+    add_index :comfy_cms_pages, %i(parent_id position)
 
     # -- Page Blocks --------------------------------------------------------
     create_table :comfy_cms_blocks do |t|
@@ -63,7 +63,7 @@ class CreateCms < ActiveRecord::Migration
       t.timestamps null: true
     end
     add_index :comfy_cms_blocks, [:identifier]
-    add_index :comfy_cms_blocks, [:blockable_id, :blockable_type]
+    add_index :comfy_cms_blocks, %i(blockable_id blockable_type)
 
     # -- Snippets -----------------------------------------------------------
     create_table :comfy_cms_snippets do |t|
@@ -75,8 +75,8 @@ class CreateCms < ActiveRecord::Migration
       t.boolean :is_shared,   null: false, default: false
       t.timestamps null: true
     end
-    add_index :comfy_cms_snippets, [:site_id, :identifier], unique: true
-    add_index :comfy_cms_snippets, [:site_id, :position]
+    add_index :comfy_cms_snippets, %i(site_id identifier), unique: true
+    add_index :comfy_cms_snippets, %i(site_id position)
 
     # -- Files --------------------------------------------------------------
     create_table :comfy_cms_files do |t|
@@ -90,10 +90,10 @@ class CreateCms < ActiveRecord::Migration
       t.integer :position,          null: false, default: 0
       t.timestamps null: true
     end
-    add_index :comfy_cms_files, [:site_id, :label]
-    add_index :comfy_cms_files, [:site_id, :file_file_name]
-    add_index :comfy_cms_files, [:site_id, :position]
-    add_index :comfy_cms_files, [:site_id, :block_id]
+    add_index :comfy_cms_files, %i(site_id label)
+    add_index :comfy_cms_files, %i(site_id file_file_name)
+    add_index :comfy_cms_files, %i(site_id position)
+    add_index :comfy_cms_files, %i(site_id block_id)
 
     # -- Revisions -----------------------------------------------------------
     create_table :comfy_cms_revisions, force: true do |t|
@@ -102,7 +102,7 @@ class CreateCms < ActiveRecord::Migration
       t.text      :data,        text_limit
       t.datetime  :created_at
     end
-    add_index :comfy_cms_revisions, [:record_type, :record_id, :created_at],
+    add_index :comfy_cms_revisions, %i(record_type record_id created_at),
       name: 'index_cms_revisions_on_rtype_and_rid_and_created_at'
 
     # -- Categories ---------------------------------------------------------
@@ -111,7 +111,7 @@ class CreateCms < ActiveRecord::Migration
       t.string  :label,            null: false
       t.string  :categorized_type, null: false
     end
-    add_index :comfy_cms_categories, [:site_id, :categorized_type, :label],
+    add_index :comfy_cms_categories, %i(site_id categorized_type label),
       unique: true,
       name: 'index_cms_categories_on_site_id_and_cat_type_and_label'
 
@@ -120,7 +120,7 @@ class CreateCms < ActiveRecord::Migration
       t.string  :categorized_type,  null: false
       t.integer :categorized_id,    null: false
     end
-    add_index :comfy_cms_categorizations, [:category_id, :categorized_type, :categorized_id],
+    add_index :comfy_cms_categorizations, %i(category_id categorized_type categorized_id),
       unique: true,
       name: 'index_cms_categorizations_on_cat_id_and_catd_type_and_catd_id'
   end
diff --git a/db/migrate/20161201154922_add_photos_seeds_table.rb b/db/migrate/20161201154922_add_photos_seeds_table.rb
index 31693d225..f4a2f18fe 100644
--- a/db/migrate/20161201154922_add_photos_seeds_table.rb
+++ b/db/migrate/20161201154922_add_photos_seeds_table.rb
@@ -4,6 +4,6 @@ class AddPhotosSeedsTable < ActiveRecord::Migration
       t.integer :photo_id
       t.integer :seed_id
     end
-    add_index(:photos_seeds, [:seed_id, :photo_id])
+    add_index(:photos_seeds, %i(seed_id photo_id))
   end
 end
diff --git a/lib/geocodable.rb b/lib/geocodable.rb
index 93a09aaf7..7e00c7566 100644
--- a/lib/geocodable.rb
+++ b/lib/geocodable.rb
@@ -6,7 +6,7 @@ module Geocodable
   private
 
   def empty_unwanted_geocodes
-    return unless location.blank?
+    return if location.present?
     self.latitude = nil
     self.longitude = nil
   end
diff --git a/lib/tasks/growstuff.rake b/lib/tasks/growstuff.rake
index 1daab4175..03b2e3d0e 100644
--- a/lib/tasks/growstuff.rake
+++ b/lib/tasks/growstuff.rake
@@ -62,7 +62,7 @@ namespace :growstuff do
   # this fixes up anyone who has erroneously wound up with a 0,0 lat/long
   task depopulate_null_island: :environment do
     Member.find_each do |m|
-      if m.location and (m.latitude == nil and m.longitude == nil)
+      if m.location and (m.latitude.nil? and m.longitude.nil?)
         m.geocode
         m.save
       end
@@ -140,9 +140,7 @@ namespace :growstuff do
 
       puts "Giving each member an account record..."
       Member.all.each do |m|
-        unless m.account
-          Account.create(member_id: m.id)
-        end
+        Account.create(member_id: m.id) unless m.account
       end
 
       puts "Making Skud a staff account..."
@@ -224,12 +222,11 @@ namespace :growstuff do
     task initialize_garden_locations: :environment do
       Member.located.find_each do |m|
         m.gardens.each do |g|
-          if g.location.blank?
-            g.location = m.location
-            g.latitude = m.latitude
-            g.longitude = m.longitude
-            g.save
-          end
+          next if g.location.present?
+          g.location = m.location
+          g.latitude = m.latitude
+          g.longitude = m.longitude
+          g.save
         end
       end
     end
@@ -277,16 +274,12 @@ namespace :growstuff do
 
     desc "October 2014: remove unused photos"
     task remove_unused_photos: :environment do
-      Photo.find_each do |p|
-        p.destroy_if_unused
-      end
+      Photo.find_each(&:destroy_if_unused)
     end
 
     desc "October 2014: generate crops_posts records for existing posts"
     task generate_crops_posts_records: :environment do
-      Post.find_each do |p|
-        p.save
-      end
+      Post.find_each(&:save)
     end
 
     desc "October 2014: add alternate names for crops"
diff --git a/script/check_contributors_md.rb b/script/check_contributors_md.rb
index 444cf372d..3fca50489 100755
--- a/script/check_contributors_md.rb
+++ b/script/check_contributors_md.rb
@@ -18,7 +18,7 @@ if ENV['TRAVIS']
   end
 else
   author = `git config github.user`.chomp
-  if $?.exitstatus.positive?
+  if $CHILD_STATUS.exitstatus.positive?
     abort %(
 Couldn't determine your GitHub username, and not in a Travis PR build
 Please set it using
diff --git a/script/heroku_maintenance.rb b/script/heroku_maintenance.rb
index c4cda6aa7..d2a20d67a 100755
--- a/script/heroku_maintenance.rb
+++ b/script/heroku_maintenance.rb
@@ -18,7 +18,7 @@ when "on"
 when "off"
   maintenance_state = false
 else
-  abort "usage: #{$0} (on|off)"
+  abort "usage: #{$PROGRAM_NAME} (on|off)"
 end
 
 puts "Turning #{maintenance_state} maintenance mode on app #{app}"
diff --git a/spec/controllers/photo_associations_controller_spec.rb b/spec/controllers/photo_associations_controller_spec.rb
index a15d2143d..42e0ccc37 100644
--- a/spec/controllers/photo_associations_controller_spec.rb
+++ b/spec/controllers/photo_associations_controller_spec.rb
@@ -33,7 +33,7 @@ describe PhotoAssociationsController do
           rescue
             nil
           end
-        end.not_to change { photo.harvests.count }
+        end.not_to change(photo.harvests, :count)
       end
       it { expect { delete :destroy, valid_params }.to raise_error(ActiveRecord::RecordNotFound) }
     end
diff --git a/spec/factories/member.rb b/spec/factories/member.rb
index b3380e628..619e7d4f2 100644
--- a/spec/factories/member.rb
+++ b/spec/factories/member.rb
@@ -2,7 +2,7 @@ FactoryBot.define do
   sequence(:email) { |n| "member#{n}@example.com" }
   sequence(:login_name) { |n| "member#{n}" }
 
-  factory :member, aliases: [:author, :owner, :sender, :recipient, :creator] do
+  factory :member, aliases: %i(author owner sender recipient creator) do
     login_name { generate(:login_name) }
     password 'password1'
     email { generate(:email) }
diff --git a/spec/features/notifications_spec.rb b/spec/features/notifications_spec.rb
index feaf5d351..aa81403d6 100644
--- a/spec/features/notifications_spec.rb
+++ b/spec/features/notifications_spec.rb
@@ -5,13 +5,13 @@ feature "Notifications", :js do
   let(:recipient) { create :member }
 
   context "On existing notification" do
-    let!(:notification) {
+    let!(:notification) do
       create :notification,
         sender: sender,
         recipient: recipient,
         body: "Notification body",
         post_id: nil
-    }
+    end
 
     background do
       login_as recipient
diff --git a/spec/features/signin_spec.rb b/spec/features/signin_spec.rb
index a6224e05a..acd9f5295 100644
--- a/spec/features/signin_spec.rb
+++ b/spec/features/signin_spec.rb
@@ -48,7 +48,7 @@ feature "signin", js: true do
   end
 
   describe "redirects to what you were trying to do" do
-    %w[plantings harvests posts photos gardens seeds].each do |m|
+    %w(plantings harvests posts photos gardens seeds).each do |m|
       it_behaves_like "redirects to what you were trying to do" do
         let(:model_name) { m }
       end
diff --git a/spec/helpers/application_helper_spec.rb b/spec/helpers/application_helper_spec.rb
index fe390bbc0..b3ea0ce52 100644
--- a/spec/helpers/application_helper_spec.rb
+++ b/spec/helpers/application_helper_spec.rb
@@ -3,7 +3,7 @@ require 'rails_helper'
 describe ApplicationHelper do
   it "formats prices" do
     price_in_dollars(999).should eq '9.99'
-    price_with_currency(999).should eq '9.99 %s' % Growstuff::Application.config.currency
+    price_with_currency(999).should eq format('9.99 %s', Growstuff::Application.config.currency)
   end
 
   it "parses dates" do
diff --git a/spec/lib/haml/filters/escaped_markdown_spec.rb b/spec/lib/haml/filters/escaped_markdown_spec.rb
index 5afac0a04..415751293 100644
--- a/spec/lib/haml/filters/escaped_markdown_spec.rb
+++ b/spec/lib/haml/filters/escaped_markdown_spec.rb
@@ -5,7 +5,7 @@ require 'haml/helpers'
 
 describe 'Haml::Filters::Escaped_Markdown' do
   it 'is registered as the handler for :escaped_markdown' do
-    Haml::Filters::defined['escaped_markdown'].should ==
+    Haml::Filters.defined['escaped_markdown'].should ==
       Haml::Filters::EscapedMarkdown
   end
 
diff --git a/spec/lib/haml/filters/growstuff_markdown_spec.rb b/spec/lib/haml/filters/growstuff_markdown_spec.rb
index bc1b66b66..03ad3b0e1 100644
--- a/spec/lib/haml/filters/growstuff_markdown_spec.rb
+++ b/spec/lib/haml/filters/growstuff_markdown_spec.rb
@@ -24,7 +24,7 @@ end
 
 describe 'Haml::Filters::Growstuff_Markdown' do
   it 'is registered as the handler for :growstuff_markdown' do
-    Haml::Filters::defined['growstuff_markdown'].should ==
+    Haml::Filters.defined['growstuff_markdown'].should ==
       Haml::Filters::GrowstuffMarkdown
   end
 
diff --git a/spec/models/ability_spec.rb b/spec/models/ability_spec.rb
index f855a6cfd..ef746c8bc 100644
--- a/spec/models/ability_spec.rb
+++ b/spec/models/ability_spec.rb
@@ -111,19 +111,23 @@ describe Ability do
 
   context "orders" do
     let(:order) { FactoryBot.create(:order, member: member) }
-    let(:strangers_order) {
+    let(:strangers_order) do
       FactoryBot.create(:order,
-        member: FactoryBot.create(:member)) }
-    let(:completed_order) {
+        member: FactoryBot.create(:member))
+    end
+    let(:completed_order) do
       FactoryBot.create(:completed_order,
-        member: member) }
+        member: member)
+    end
     let(:order_item) { FactoryBot.create(:order_item, order: order) }
-    let(:strangers_order_item) {
+    let(:strangers_order_item) do
       FactoryBot.create(:order_item,
-        order: strangers_order) }
-    let(:completed_order_item) {
+        order: strangers_order)
+    end
+    let(:completed_order_item) do
       FactoryBot.create(:order_item,
-        order: completed_order) }
+        order: completed_order)
+    end
 
     context "standard member" do
       it "can read their own orders" do
diff --git a/spec/models/comment_spec.rb b/spec/models/comment_spec.rb
index b98c52062..bc90ee8ba 100644
--- a/spec/models/comment_spec.rb
+++ b/spec/models/comment_spec.rb
@@ -17,9 +17,9 @@ describe Comment do
     let(:comment) { FactoryBot.create(:comment) }
 
     it "sends a notification when a comment is posted" do
-      expect {
+      expect do
         FactoryBot.create(:comment)
-      }.to change(Notification, :count).by(1)
+      end.to change(Notification, :count).by(1)
     end
 
     it "sets the notification fields" do
@@ -35,9 +35,9 @@ describe Comment do
     it "doesn't send notifications to yourself" do
       @m = FactoryBot.create(:member)
       @p = FactoryBot.create(:post, author: @m)
-      expect {
+      expect do
         FactoryBot.create(:comment, post: @p, author: @m)
-      }.to change(Notification, :count).by(0)
+      end.to change(Notification, :count).by(0)
     end
   end
 
diff --git a/spec/models/crop_spec.rb b/spec/models/crop_spec.rb
index 5d9b671c0..73a460302 100644
--- a/spec/models/crop_spec.rb
+++ b/spec/models/crop_spec.rb
@@ -275,17 +275,17 @@ describe Crop do
       @crop2 = FactoryBot.create(:crop)
 
       # they need 3+ plantings each to be interesting
-      (1..3).each do
+      3.times do
         FactoryBot.create(:planting, crop: @crop1)
       end
-      (1..3).each do
+      3.times do
         FactoryBot.create(:planting, crop: @crop2)
       end
 
       # crops need 3+ photos to be interesting
       @photo = FactoryBot.create(:photo)
       [@crop1, @crop2].each do |c|
-        (1..3).each do
+        3.times do
           c.plantings.first.photos << @photo
           c.plantings.first.save
         end
@@ -302,13 +302,13 @@ describe Crop do
       @crop2 = FactoryBot.create(:crop)
 
       # only crop1 has plantings
-      (1..3).each do
+      3.times do
         FactoryBot.create(:planting, crop: @crop1)
       end
 
       # ... and photos
       @photo = FactoryBot.create(:photo)
-      (1..3).each do
+      3.times do
         @crop1.plantings.first.photos << @photo
         @crop1.plantings.first.save
       end
@@ -324,16 +324,16 @@ describe Crop do
       @crop2 = FactoryBot.create(:crop)
 
       # both crops have plantings
-      (1..3).each do
+      3.times do
         FactoryBot.create(:planting, crop: @crop1)
       end
-      (1..3).each do
+      3.times do
         FactoryBot.create(:planting, crop: @crop2)
       end
 
       # but only crop1 has photos
       @photo = FactoryBot.create(:photo)
-      (1..3).each do
+      3.times do
         @crop1.plantings.first.photos << @photo
         @crop1.plantings.first.save
       end
diff --git a/spec/models/follow_spec.rb b/spec/models/follow_spec.rb
index 4bf82f2b3..bd61fe2ee 100644
--- a/spec/models/follow_spec.rb
+++ b/spec/models/follow_spec.rb
@@ -7,16 +7,16 @@ describe Follow do
   end
 
   it "sends a notification when a follow is created" do
-    expect {
+    expect do
       Follow.create(follower_id: @member1.id, followed_id: @member2.id)
-    }.to change(Notification, :count).by(1)
+    end.to change(Notification, :count).by(1)
   end
 
   it "does not delete any members when follow is deleted" do
-    expect {
+    expect do
       follow = Follow.create(follower_id: @member1.id, followed_id: @member2.id)
       follow.destroy
-    }.not_to change(Member, :count)
+    end.not_to change(Member, :count)
   end
 
   context "when follow is created" do
diff --git a/spec/models/member_spec.rb b/spec/models/member_spec.rb
index 7dd56f1cb..1911ae8da 100644
--- a/spec/models/member_spec.rb
+++ b/spec/models/member_spec.rb
@@ -353,9 +353,10 @@ describe 'member' do
   end
 
   context "update account" do
-    let(:product) {
+    let(:product) do
       FactoryBot.create(:product,
-        paid_months: 3)}
+        paid_months: 3)
+    end
     let(:member) { FactoryBot.create(:member) }
 
     it "sets account_type" do
diff --git a/spec/models/post_spec.rb b/spec/models/post_spec.rb
index 566f451cb..cb8cbcc91 100644
--- a/spec/models/post_spec.rb
+++ b/spec/models/post_spec.rb
@@ -95,15 +95,15 @@ describe Post do
     let(:member2) { FactoryBot.create(:member) }
 
     it "sends a notification when a member is mentioned using @-syntax" do
-      expect {
+      expect do
         FactoryBot.create(:post, author: member, body: "Hey @#{member2}")
-      }.to change(Notification, :count).by(1)
+      end.to change(Notification, :count).by(1)
     end
 
     it "sends a notification when a member is mentioned using [](member) syntax" do
-      expect {
+      expect do
         FactoryBot.create(:post, author: member, body: "Hey [#{member2}](member)")
-      }.to change(Notification, :count).by(1)
+      end.to change(Notification, :count).by(1)
     end
 
     it "sets the notification field" do
@@ -117,15 +117,15 @@ describe Post do
 
     it "sends notifications to all members mentioned" do
       member3 = FactoryBot.create(:member)
-      expect {
+      expect do
         FactoryBot.create(:post, author: member, body: "Hey @#{member2} & @#{member3}")
-      }.to change(Notification, :count).by(2)
+      end.to change(Notification, :count).by(2)
     end
 
     it "doesn't send notifications if you mention yourself" do
-      expect {
+      expect do
         FactoryBot.create(:post, author: member, body: "@#{member}")
-      }.to change(Notification, :count).by(0)
+      end.to change(Notification, :count).by(0)
     end
   end
 
diff --git a/spec/models/seed_spec.rb b/spec/models/seed_spec.rb
index aa06af6eb..c1cd95cbd 100644
--- a/spec/models/seed_spec.rb
+++ b/spec/models/seed_spec.rb
@@ -112,7 +112,7 @@ describe Seed do
     end
 
     it 'should refuse invalid organic/GMO/heirloom values' do
-      [:organic, :gmo, :heirloom].each do |field|
+      %i(organic gmo heirloom).each do |field|
         @seed = FactoryBot.build(:seed, field => 'not valid')
         @seed.should_not be_valid
         @seed.errors[field].should_not be_empty
@@ -120,7 +120,7 @@ describe Seed do
     end
 
     it 'should not allow nil or blank values' do
-      [:organic, :gmo, :heirloom].each do |field|
+      %i(organic gmo heirloom).each do |field|
         @seed = FactoryBot.build(:seed, field => nil)
         @seed.should_not be_valid
         @seed = FactoryBot.build(:seed, field => '')
diff --git a/spec/rails_helper.rb b/spec/rails_helper.rb
index 800df0ebb..e28dd6e24 100644
--- a/spec/rails_helper.rb
+++ b/spec/rails_helper.rb
@@ -37,7 +37,7 @@ if ENV['GROWSTUFF_CAPYBARA_DRIVER'].present?
 end
 
 Capybara::Screenshot.register_filename_prefix_formatter(:rspec) do |example|
-  "screenshot_#{example.description.gsub(' ', '-').gsub(/^.*\/spec\//, '')}"
+  "screenshot_#{example.description.tr(' ', '-').gsub(/^.*\/spec\//, '')}"
 end
 
 Capybara.app_host = 'http://localhost'
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 488353ff7..9a0b542df 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -28,7 +28,7 @@ RSpec.configure do |config|
     #   # => "be bigger than 2 and smaller than 4"
     # ...rather than:
     #   # => "be bigger than 2"
-    expectations.syntax = [:should, :expect]
+    expectations.syntax = %i(should expect)
     expectations.include_chain_clauses_in_custom_matcher_descriptions = true
   end
 
@@ -39,7 +39,7 @@ RSpec.configure do |config|
     # a real object. This is generally recommended, and will default to
     # `true` in RSpec 4.
     mocks.verify_partial_doubles = false
-    mocks.syntax = [:should, :expect]
+    mocks.syntax = %i(should expect)
   end
 
   # The settings below are suggested to provide a good initial experience
diff --git a/spec/support/feature_helpers.rb b/spec/support/feature_helpers.rb
index fd2d2c24b..f11a3a957 100644
--- a/spec/support/feature_helpers.rb
+++ b/spec/support/feature_helpers.rb
@@ -8,7 +8,7 @@ module FeatureHelpers
 
   def select_from_autocomplete(select)
     page.should have_selector('ul.ui-autocomplete li.ui-menu-item a')
-    selector = %Q{ul.ui-autocomplete li.ui-menu-item a:contains("#{select}")}
+    selector = %{ul.ui-autocomplete li.ui-menu-item a:contains("#{select}")}
     page.execute_script " $('#{selector}').mouseenter().click() "
   end
 end
diff --git a/spec/views/crops/edit.html.haml_spec.rb b/spec/views/crops/edit.html.haml_spec.rb
index eed85528d..19fac21af 100644
--- a/spec/views/crops/edit.html.haml_spec.rb
+++ b/spec/views/crops/edit.html.haml_spec.rb
@@ -2,9 +2,9 @@ require 'rails_helper'
 
 describe "crops/edit" do
   before(:each) do
-    controller.stub(:current_user) {
+    controller.stub(:current_user) do
       FactoryBot.create(:crop_wrangling_member)
-    }
+    end
     @crop = FactoryBot.create(:maize)
     3.times do
       @crop.scientific_names.build
diff --git a/spec/views/shop/index_spec.rb b/spec/views/shop/index_spec.rb
index 3bd0061d7..754f05c09 100644
--- a/spec/views/shop/index_spec.rb
+++ b/spec/views/shop/index_spec.rb
@@ -20,7 +20,7 @@ describe 'shop/index.html.haml', type: "view" do
     end
 
     it 'shows prices in configured currency' do
-      rendered.should have_content '9.99 %s' % Growstuff::Application.config.currency
+      rendered.should have_content format('9.99 %s', Growstuff::Application.config.currency)
     end
 
     it 'should contain an exchange rate link' do
@@ -29,7 +29,7 @@ describe 'shop/index.html.haml', type: "view" do
     end
 
     it 'shows recommended price for products that have it' do
-      rendered.should have_content '12.00 %s' % Growstuff::Application.config.currency
+      rendered.should have_content format('12.00 %s', Growstuff::Application.config.currency)
     end
 
     it 'should contain an exchange rate link for recommended price' do