diff --git a/.rubocop.yml b/.rubocop.yml
index 59b273ced..262358bdc 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -1,2 +1,6 @@
 Metrics/LineLength:
   Max: 120
+Metrics/MethodLength:
+  Max: 16
+Style/BracesAroundHashParameters:
+  EnforcedStyle: context_dependent
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0ee3cf27b..9138e8dd3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 - Migrated front-end application from CoffeeScript to ECMAScript 6 (JS)
 - Integration of Eslint and Rubocop coding rules
 - Fix a bug: on small screens, display of button "change group" overflows
+- Fix a bug: creating a transverse plan, create one for the hidden admins group
 - Fix a security issue: dependency rack has a vulnerability as described in [CVE-2018-16471](https://nvd.nist.gov/vuln/detail/CVE-2018-16471)
 - Fix a security issue: dependency loofah has a vulnerability as described in [CVE-2018-16468](https://github.com/flavorjones/loofah/issues/154)
 - Updated documentation
diff --git a/app/models/group.rb b/app/models/group.rb
index ed1ddc1c4..67a1370a2 100644
--- a/app/models/group.rb
+++ b/app/models/group.rb
@@ -5,6 +5,8 @@ class Group < ActiveRecord::Base
   has_many :machines_prices, ->{ where(priceable_type: 'Machine') }, class_name: 'Price', dependent: :destroy
   has_many :spaces_prices, ->{ where(priceable_type: 'Space') }, class_name: 'Price', dependent: :destroy
 
+  scope :all_except_admins, -> { where.not(slug: 'admins') }
+
   extend FriendlyId
   friendly_id :name, use: :slugged
 
@@ -19,23 +21,24 @@ class Group < ActiveRecord::Base
   end
 
   private
-    def create_prices
-      create_trainings_pricings
-      create_machines_prices
-      create_spaces_prices
-    end
 
-    def create_trainings_pricings
-      Training.all.each do |training|
-        TrainingsPricing.create(group: self, training: training, amount: 0)
-      end
-    end
+  def create_prices
+    create_trainings_pricings
+    create_machines_prices
+    create_spaces_prices
+  end
 
-    def create_machines_prices
-      Machine.all.each do |machine|
-        Price.create(priceable: machine, group: self, amount: 0)
-      end
+  def create_trainings_pricings
+    Training.all.each do |training|
+      TrainingsPricing.create(group: self, training: training, amount: 0)
     end
+  end
+
+  def create_machines_prices
+    Machine.all.each do |machine|
+      Price.create(priceable: machine, group: self, amount: 0)
+    end
+  end
 
   def create_spaces_prices
     Space.all.each do |space|
@@ -45,13 +48,15 @@ class Group < ActiveRecord::Base
 
   def create_statistic_subtype
     user_index = StatisticIndex.find_by(es_type_key: 'user')
-    StatisticSubType.create!({statistic_types: user_index.statistic_types, key: self.slug, label: self.name})
+    StatisticSubType.create!( statistic_types: user_index.statistic_types, key: slug, label: name)
   end
 
   def update_statistic_subtype
     user_index = StatisticIndex.find_by(es_type_key: 'user')
-    subtype = StatisticSubType.joins(statistic_type_sub_types: :statistic_type).where(key: self.slug, statistic_types: { statistic_index_id: user_index.id }).first
-    subtype.label = self.name
+    subtype = StatisticSubType.joins(statistic_type_sub_types: :statistic_type)
+                              .where(key: slug, statistic_types: { statistic_index_id: user_index.id })
+                              .first
+    subtype.label = name
     subtype.save!
   end
 end
diff --git a/app/models/plan.rb b/app/models/plan.rb
index 8acd35146..e01bc9736 100644
--- a/app/models/plan.rb
+++ b/app/models/plan.rb
@@ -27,19 +27,19 @@ class Plan < ActiveRecord::Base
 
   validates :amount, :group, :base_name, presence: true
   validates :interval_count, numericality: { only_integer: true, greater_than_or_equal_to: 1 }
-  validates :interval_count, numericality: { less_than: 12 }, if: Proc.new {|plan| plan.interval == 'month'}
-  validates :interval_count, numericality: { less_than: 52 }, if: Proc.new {|plan| plan.interval == 'week'}
-  validates :interval, inclusion: { in: %w(year month week) }
+  validates :interval_count, numericality: { less_than: 12 }, if: proc { |plan| plan.interval == 'month' }
+  validates :interval_count, numericality: { less_than: 52 }, if: proc { |plan| plan.interval == 'week' }
+  validates :interval, inclusion: { in: %w[year month week] }
   validates :base_name, :slug, presence: true
 
   def self.create_for_all_groups(plan_params)
     plans = []
-    Group.all.each do |group|
-      if plan_params[:type] == 'PartnerPlan'
-        plan = PartnerPlan.new(plan_params.except(:group_id, :type))
-      else
-        plan = Plan.new(plan_params.except(:group_id, :type))
-      end
+    Group.all_except_admins.each do |group|
+      plan = if plan_params[:type] == 'PartnerPlan'
+               PartnerPlan.new(plan_params.except(:group_id, :type))
+             else
+               Plan.new(plan_params.except(:group_id, :type))
+             end
       plan.group = group
       if plan.save
         plans << plan
@@ -48,7 +48,7 @@ class Plan < ActiveRecord::Base
         return false
       end
     end
-    return plans
+    plans
   end
 
   def destroyable?
@@ -73,27 +73,34 @@ class Plan < ActiveRecord::Base
 
   def human_readable_duration
     i18n_key = "duration.#{interval}"
-    "#{I18n.t(i18n_key, count: interval_count)}"
+    I18n.t(i18n_key, count: interval_count).to_s
   end
 
   def human_readable_name(opts = {})
-    result = "#{base_name}"
+    result = base_name.to_s
     result += " - #{group.slug}" if opts[:group]
     result + " - #{human_readable_duration}"
   end
 
   # must be publicly accessible for the migration
   def create_statistic_type
-    stat_index = StatisticIndex.where({es_type_key: 'subscription'})
-    type = StatisticType.find_by(statistic_index_id: stat_index.first.id, key: self.duration.to_i)
-    if type == nil
-      type = StatisticType.create!({statistic_index_id: stat_index.first.id, key: self.duration.to_i, label: 'Durée : '+self.human_readable_duration, graph: true, simple: true})
+    stat_index = StatisticIndex.where(es_type_key: 'subscription')
+    type = StatisticType.find_by(statistic_index_id: stat_index.first.id, key: duration.to_i)
+    if type.nil?
+      type = StatisticType.create!(
+        statistic_index_id: stat_index.first.id,
+        key: duration.to_i,
+        label: "Durée : #{human_readable_duration}",
+        graph: true,
+        simple: true
+      )
     end
     subtype = create_statistic_subtype
     create_statistic_association(type, subtype)
   end
 
   private
+
   def create_stripe_plan
     stripe_plan = Stripe::Plan.create(
       amount: amount,
@@ -108,12 +115,12 @@ class Plan < ActiveRecord::Base
   end
 
   def create_statistic_subtype
-    StatisticSubType.create!({key: self.slug, label: self.name})
+    StatisticSubType.create!(key: slug, label: name)
   end
 
   def create_statistic_association(stat_type, stat_subtype)
-    if stat_type != nil and stat_subtype != nil
-      StatisticTypeSubType.create!({statistic_type: stat_type, statistic_sub_type: stat_subtype})
+    if !stat_type.nil? && !stat_subtype.nil?
+      StatisticTypeSubType.create!(statistic_type: stat_type, statistic_sub_type: stat_subtype)
     else
       puts 'ERROR: Unable to create the statistics association for the new plan. '+
            'Possible causes: the type or the subtype were not created successfully.'