diff --git a/app/controllers/new_gestionnaire/dossiers_controller.rb b/app/controllers/new_gestionnaire/dossiers_controller.rb
index 9fe474620..5adafcdf3 100644
--- a/app/controllers/new_gestionnaire/dossiers_controller.rb
+++ b/app/controllers/new_gestionnaire/dossiers_controller.rb
@@ -7,21 +7,25 @@ module NewGestionnaire
     def show
       @dossier = dossier
       dossier.notifications.demande.mark_as_read
+      current_gestionnaire.mark_tab_as_seen(dossier, :demande)
     end
 
     def messagerie
       @dossier = dossier
       dossier.notifications.messagerie.mark_as_read
+      current_gestionnaire.mark_tab_as_seen(dossier, :messagerie)
     end
 
     def annotations_privees
       @dossier = dossier
       dossier.notifications.annotations_privees.mark_as_read
+      current_gestionnaire.mark_tab_as_seen(dossier, :annotations_privees)
     end
 
     def avis
       @dossier = dossier
       dossier.notifications.avis.mark_as_read
+      current_gestionnaire.mark_tab_as_seen(dossier, :avis)
     end
 
     def follow
diff --git a/app/models/avis.rb b/app/models/avis.rb
index 39ef291ae..2f9aac2c9 100644
--- a/app/models/avis.rb
+++ b/app/models/avis.rb
@@ -12,6 +12,7 @@ class Avis < ApplicationRecord
   scope :without_answer, -> { where(answer: nil) }
   scope :for_dossier, ->(dossier_id) { where(dossier_id: dossier_id) }
   scope :by_latest, -> { order(updated_at: :desc) }
+  scope :updated_since?, -> (date) { where('avis.updated_at > ?', date) }
 
   def email_to_display
     gestionnaire.try(:email) || email
diff --git a/app/models/champ.rb b/app/models/champ.rb
index 084b294e8..ee0ee446f 100644
--- a/app/models/champ.rb
+++ b/app/models/champ.rb
@@ -11,6 +11,8 @@ class Champ < ActiveRecord::Base
 
   after_save :internal_notification, if: Proc.new { !dossier.nil? }
 
+  scope :updated_since?, -> (date) { where('champs.updated_at > ?', date) }
+
   def mandatory?
     mandatory
   end
diff --git a/app/models/commentaire.rb b/app/models/commentaire.rb
index 05c3a5f08..5fd425029 100644
--- a/app/models/commentaire.rb
+++ b/app/models/commentaire.rb
@@ -5,6 +5,7 @@ class Commentaire < ActiveRecord::Base
   belongs_to :piece_justificative
 
   default_scope { order(created_at: :asc) }
+  scope :updated_since?, -> (date) { where('commentaires.updated_at > ?', date) }
 
   after_create :notify
 
diff --git a/app/models/dossier.rb b/app/models/dossier.rb
index 1da325eb3..e18d241a5 100644
--- a/app/models/dossier.rb
+++ b/app/models/dossier.rb
@@ -62,6 +62,7 @@ class Dossier < ActiveRecord::Base
   scope :en_cours,                    -> { not_archived.state_en_construction_ou_instruction }
   scope :without_followers,           -> { left_outer_joins(:follows).where(follows: { id: nil }) }
   scope :with_unread_notifications,   -> { where(notifications: { already_read: false }) }
+  scope :followed_by ,                -> (gestionnaire) { joins(:follows).where(follows: { gestionnaire: gestionnaire }) }
 
   accepts_nested_attributes_for :individual
 
diff --git a/app/models/follow.rb b/app/models/follow.rb
index 53e234f7e..2df639902 100644
--- a/app/models/follow.rb
+++ b/app/models/follow.rb
@@ -3,4 +3,15 @@ class Follow < ActiveRecord::Base
   belongs_to :dossier
 
   validates_uniqueness_of :gestionnaire_id, :scope => :dossier_id
+
+  before_create :set_default_date
+
+  private
+
+  def set_default_date
+    self.demande_seen_at = DateTime.now
+    self.annotations_privees_seen_at = DateTime.now
+    self.avis_seen_at = DateTime.now
+    self.messagerie_seen_at = DateTime.now
+  end
 end
diff --git a/app/models/gestionnaire.rb b/app/models/gestionnaire.rb
index 5b1344e83..eed1f4598 100644
--- a/app/models/gestionnaire.rb
+++ b/app/models/gestionnaire.rb
@@ -131,6 +131,56 @@ class Gestionnaire < ActiveRecord::Base
     assign_to.find_by(procedure_id: procedure_id).procedure_presentation_or_default
   end
 
+  def notifications_for_dossier(dossier)
+    follow = Follow
+      .includes(dossier: [:champs, :avis, :commentaires])
+      .find_by(gestionnaire: self, dossier: dossier)
+
+    if follow.present?
+      #retirer le seen_at.present? une fois la contrainte de presence en base (et les migrations ad hoc)
+      champs_publiques = follow.demande_seen_at.present? &&
+        follow.dossier.champs.updated_since?(follow.demande_seen_at).any?
+
+      pieces_justificatives = follow.demande_seen_at.present? &&
+        follow.dossier.pieces_justificatives.updated_since?(follow.demande_seen_at).any?
+
+      demande = champs_publiques || pieces_justificatives
+
+      annotations_privees = follow.annotations_privees_seen_at.present? &&
+        follow.dossier.champs_private.updated_since?(follow.annotations_privees_seen_at).any?
+
+      avis_notif = follow.avis_seen_at.present? &&
+        follow.dossier.avis.updated_since?(follow.avis_seen_at).any?
+
+      messagerie = follow.messagerie_seen_at.present? &&
+        dossier.commentaires
+        .where.not(email: 'contact@tps.apientreprise.fr')
+        .updated_since?(follow.messagerie_seen_at).any?
+
+      annotations_hash(demande, annotations_privees, avis_notif, messagerie)
+    else
+      annotations_hash(false, false, false, false)
+    end
+  end
+
+  def notifications_for_procedure(procedure)
+    dossiers = procedure.dossiers.en_cours.followed_by(self)
+
+    dossiers_id_with_notifications(dossiers)
+  end
+
+  def notifications_per_procedure
+    dossiers = Dossier.en_cours.followed_by(self)
+
+    Dossier.where(id: dossiers_id_with_notifications(dossiers)).group(:procedure_id).count
+  end
+
+  def mark_tab_as_seen(dossier, tab)
+    attributes = {}
+    attributes["#{tab}_seen_at"] = DateTime.now
+    Follow.where(gestionnaire: self, dossier: dossier).update_all(attributes)
+  end
+
   private
 
   def valid_couple_table_attr? table, column
@@ -153,4 +203,42 @@ class Gestionnaire < ActiveRecord::Base
 
     couples.include?({table: table, column: column})
   end
+
+  def annotations_hash(demande, annotations_privees, avis, messagerie)
+    {
+      demande: demande,
+      annotations_privees: annotations_privees,
+      avis: avis,
+      messagerie: messagerie
+    }
+  end
+
+  def dossiers_id_with_notifications(dossiers)
+    updated_demandes = dossiers
+      .joins(:champs)
+      .where('champs.updated_at > follows.demande_seen_at')
+
+    updated_pieces_justificatives = dossiers
+      .joins(:pieces_justificatives)
+      .where('pieces_justificatives.updated_at > follows.demande_seen_at')
+
+    updated_annotations = dossiers
+      .joins(:champs_private)
+      .where('champs.updated_at > follows.annotations_privees_seen_at')
+
+    updated_avis = dossiers
+      .joins(:avis)
+      .where('avis.updated_at > follows.avis_seen_at')
+
+    updated_messagerie = dossiers
+      .joins(:commentaires)
+      .where('commentaires.updated_at > follows.messagerie_seen_at')
+      .where.not(commentaires: { email: 'contact@tps.apientreprise.fr' })
+
+    [updated_demandes,
+     updated_pieces_justificatives,
+     updated_annotations,
+     updated_avis,
+     updated_messagerie].map { |query| query.distinct.ids }.flatten.uniq
+  end
 end
diff --git a/app/models/piece_justificative.rb b/app/models/piece_justificative.rb
index 70f780aed..393d892cc 100644
--- a/app/models/piece_justificative.rb
+++ b/app/models/piece_justificative.rb
@@ -15,6 +15,8 @@ class PieceJustificative < ActiveRecord::Base
 
   after_save :internal_notification, if: Proc.new { !dossier.nil? }
 
+  scope :updated_since?, -> (date) { where('pieces_justificatives.updated_at > ?', date) }
+
   def empty?
     content.blank?
   end
diff --git a/app/views/new_gestionnaire/dossiers/_header.html.haml b/app/views/new_gestionnaire/dossiers/_header.html.haml
index 5d6f36316..acdd37e64 100644
--- a/app/views/new_gestionnaire/dossiers/_header.html.haml
+++ b/app/views/new_gestionnaire/dossiers/_header.html.haml
@@ -12,7 +12,7 @@
         = render partial: "new_gestionnaire/procedures/dossier_actions", locals: { procedure: dossier.procedure, dossier: dossier, dossier_is_followed: current_gestionnaire&.follow?(dossier) }
         = render partial: "state_button", locals: { dossier: dossier }
     %ul.tabs
-      - notifications_summary = dossier.notifications_summary
+      - notifications_summary = current_gestionnaire.notifications_for_dossier(dossier)
       %li{ class: current_page?(dossier_path(dossier.procedure, dossier)) ? 'active' : nil }
         - if notifications_summary[:demande]
           %span.notifications{ 'aria-label': 'notifications' }
diff --git a/app/views/new_gestionnaire/procedures/index.html.haml b/app/views/new_gestionnaire/procedures/index.html.haml
index d9f95ad54..224ceb5a3 100644
--- a/app/views/new_gestionnaire/procedures/index.html.haml
+++ b/app/views/new_gestionnaire/procedures/index.html.haml
@@ -25,7 +25,7 @@
                 %li
                   %object
                     = link_to(procedure_path(p, statut: 'suivis')) do
-                      - if @notifications_count_per_procedure[p.id].present?
+                      - if current_gestionnaire.notifications_per_procedure[p.id].present?
                         %span.notifications{ 'aria-label': "notifications" }
                       - followed_count = @followed_dossiers_count_per_procedure[p.id] || 0
                       .stats-number
diff --git a/app/views/new_gestionnaire/procedures/show.html.haml b/app/views/new_gestionnaire/procedures/show.html.haml
index d8ec7f23c..c1e9dfc49 100644
--- a/app/views/new_gestionnaire/procedures/show.html.haml
+++ b/app/views/new_gestionnaire/procedures/show.html.haml
@@ -15,7 +15,7 @@
               %span.badge= @a_suivre_dossiers.count
 
           %li{ class: (@statut == 'suivis') ? 'active' : nil }>
-            - if @followed_dossiers.with_unread_notifications.present?
+            - if current_gestionnaire.notifications_for_procedure(@procedure).present?
               %span.notifications{ 'aria-label': 'notifications' }
             = link_to(procedure_path(@procedure, statut: 'suivis')) do
               = t('pluralize.followed', count: @followed_dossiers.count)
@@ -27,7 +27,7 @@
               %span.badge= @termines_dossiers.count
 
           %li{ class: (@statut == 'tous') ? 'active' : nil }>
-            - if @followed_dossiers.with_unread_notifications.present?
+            - if current_gestionnaire.notifications_for_procedure(@procedure).present?
               %span.notifications{ 'aria-label': 'notifications' }
             = link_to(procedure_path(@procedure, statut: 'tous')) do
               tous les dossiers
@@ -99,7 +99,7 @@
               %td.number-col
                 = link_to(dossier_path(@procedure, dossier), class: 'cell-link') do
                   .icon.folder
-                    - if @followed_dossiers.with_unread_notifications.include?(dossier)
+                    - if current_gestionnaire.notifications_for_procedure(@procedure).include?(dossier.id)
                       %span.notifications{ 'aria-label': 'notifications' }
                   = dossier.id
 
diff --git a/db/migrate/20171024100606_add_time_stamp_to_champs.rb b/db/migrate/20171024100606_add_time_stamp_to_champs.rb
new file mode 100644
index 000000000..c144ed4a2
--- /dev/null
+++ b/db/migrate/20171024100606_add_time_stamp_to_champs.rb
@@ -0,0 +1,6 @@
+class AddTimeStampToChamps < ActiveRecord::Migration[5.0]
+  def change
+    add_column :champs, :created_at, :datetime
+    add_column :champs, :updated_at, :datetime
+  end
+end
diff --git a/db/migrate/20171024101439_add_last_views_at_to_follow.rb b/db/migrate/20171024101439_add_last_views_at_to_follow.rb
new file mode 100644
index 000000000..f9f831db8
--- /dev/null
+++ b/db/migrate/20171024101439_add_last_views_at_to_follow.rb
@@ -0,0 +1,8 @@
+class AddLastViewsAtToFollow < ActiveRecord::Migration[5.0]
+  def change
+    add_column :follows, :demande_seen_at, :datetime
+    add_column :follows, :annotations_privees_seen_at, :datetime
+    add_column :follows, :avis_seen_at, :datetime
+    add_column :follows, :messagerie_seen_at, :datetime
+  end
+end
diff --git a/db/migrate/20171024135653_add_column_updated_at_to_piece_justificative.rb b/db/migrate/20171024135653_add_column_updated_at_to_piece_justificative.rb
new file mode 100644
index 000000000..820b41703
--- /dev/null
+++ b/db/migrate/20171024135653_add_column_updated_at_to_piece_justificative.rb
@@ -0,0 +1,5 @@
+class AddColumnUpdatedAtToPieceJustificative < ActiveRecord::Migration[5.0]
+  def change
+    add_column :pieces_justificatives, :updated_at, :datetime
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 48a55012d..77dee82db 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20171019113610) do
+ActiveRecord::Schema.define(version: 20171024135653) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -136,10 +136,12 @@ ActiveRecord::Schema.define(version: 20171019113610) do
   end
 
   create_table "champs", force: :cascade do |t|
-    t.string  "value"
-    t.integer "type_de_champ_id"
-    t.integer "dossier_id"
-    t.string  "type"
+    t.string   "value"
+    t.integer  "type_de_champ_id"
+    t.integer  "dossier_id"
+    t.string   "type"
+    t.datetime "created_at"
+    t.datetime "updated_at"
     t.index ["dossier_id"], name: "index_champs_on_dossier_id", using: :btree
     t.index ["type_de_champ_id"], name: "index_champs_on_type_de_champ_id", using: :btree
   end
@@ -250,8 +252,12 @@ ActiveRecord::Schema.define(version: 20171019113610) do
   end
 
   create_table "follows", force: :cascade do |t|
-    t.integer "gestionnaire_id", null: false
-    t.integer "dossier_id",      null: false
+    t.integer  "gestionnaire_id",             null: false
+    t.integer  "dossier_id",                  null: false
+    t.datetime "demande_seen_at"
+    t.datetime "annotations_privees_seen_at"
+    t.datetime "avis_seen_at"
+    t.datetime "messagerie_seen_at"
     t.index ["dossier_id"], name: "index_follows_on_dossier_id", using: :btree
     t.index ["gestionnaire_id", "dossier_id"], name: "index_follows_on_gestionnaire_id_and_dossier_id", unique: true, using: :btree
     t.index ["gestionnaire_id"], name: "index_follows_on_gestionnaire_id", using: :btree
@@ -348,6 +354,7 @@ ActiveRecord::Schema.define(version: 20171019113610) do
     t.integer  "user_id"
     t.string   "original_filename"
     t.string   "content_secure_token"
+    t.datetime "updated_at"
     t.index ["dossier_id"], name: "index_pieces_justificatives_on_dossier_id", using: :btree
     t.index ["type_de_piece_justificative_id"], name: "index_pieces_justificatives_on_type_de_piece_justificative_id", using: :btree
   end
diff --git a/lib/tasks/2017_10_06_set_follow_date.rake b/lib/tasks/2017_10_06_set_follow_date.rake
new file mode 100644
index 000000000..c40f3f2f4
--- /dev/null
+++ b/lib/tasks/2017_10_06_set_follow_date.rake
@@ -0,0 +1,49 @@
+namespace :'2017_10_06_set_follow_date' do
+  task set: :environment do
+    set_default_date_to_champs_and_pieces_justificatives
+    set_all_dossiers_as_read
+    apply_legacy_notification_to_new_system
+  end
+
+  def set_default_date_to_champs_and_pieces_justificatives
+    ActiveRecord::Base.connection
+      .execute('UPDATE champs SET created_at = dossiers.created_at, updated_at = dossiers.updated_at FROM dossiers where champs.dossier_id = dossiers.id')
+
+    PieceJustificative.includes(:dossier).where(created_at: nil).each do |piece_justificative|
+      piece_justificative.update_attribute('created_at', piece_justificative.dossier.created_at)
+    end
+
+    ActiveRecord::Base.connection
+      .execute('UPDATE pieces_justificatives SET updated_at = created_at')
+  end
+
+  def set_all_dossiers_as_read
+    Gestionnaire.includes(:follows).all.each do |gestionnaire|
+      gestionnaire.follows.update_all(
+        demande_seen_at: gestionnaire.current_sign_in_at,
+        annotations_privees_seen_at: gestionnaire.current_sign_in_at,
+        avis_seen_at: gestionnaire.current_sign_in_at,
+        messagerie_seen_at: gestionnaire.current_sign_in_at)
+    end
+  end
+
+  def apply_legacy_notification_to_new_system
+    Notification.joins(dossier: :follows).unread.each do |notification|
+      if notification.demande?
+        notification.dossier.follows.update_all(demande_seen_at: notification.created_at)
+      end
+
+      if notification.annotations_privees?
+        notification.dossier.follows.update_all(annotations_privees_seen_at: notification.created_at)
+      end
+
+      if notification.avis?
+        notification.dossier.follows.update_all(avis_seen_at: notification.created_at)
+      end
+
+      if notification.messagerie?
+        notification.dossier.follows.update_all(messagerie_seen_at: notification.created_at)
+      end
+    end
+  end
+end
diff --git a/spec/models/gestionnaire_spec.rb b/spec/models/gestionnaire_spec.rb
index 99639c25f..6ed814082 100644
--- a/spec/models/gestionnaire_spec.rb
+++ b/spec/models/gestionnaire_spec.rb
@@ -318,6 +318,8 @@ describe Gestionnaire, type: :model do
       Timecop.freeze(friday)
     end
 
+    after { Timecop.return }
+
     context 'when no procedure published was active last week' do
       let!(:procedure) { create(:procedure, gestionnaires: [gestionnaire2], libelle: 'procedure', published_at: Time.now) }
       context 'when the gestionnaire has no notifications' do
@@ -404,4 +406,167 @@ describe Gestionnaire, type: :model do
     it { expect(gestionnaire.procedure_presentation_for_procedure_id(procedure.id)).to eq(pp)}
     it { expect(gestionnaire.procedure_presentation_for_procedure_id(procedure_2.id).persisted?).to be_falsey}
   end
+
+  describe '#notifications_for_dossier' do
+    let!(:dossier) { create(:dossier, :followed, state: 'initiated') }
+    let(:gestionnaire) { dossier.follows.first.gestionnaire }
+
+    subject { gestionnaire.notifications_for_dossier(dossier) }
+
+    context 'when the gestionnaire has just followed the dossier' do
+      it { is_expected.to match({ demande: false, annotations_privees: false, avis: false, messagerie: false }) }
+    end
+
+    context 'when there is a modification on public champs' do
+      before { dossier.champs.first.update_attribute('value', 'toto') }
+
+      it { is_expected.to match({ demande: true, annotations_privees: false, avis: false, messagerie: false }) }
+    end
+
+    context 'when there is a modification on a piece jusitificative' do
+      before { dossier.pieces_justificatives << create(:piece_justificative, :contrat) }
+
+      it { is_expected.to match({ demande: true, annotations_privees: false, avis: false, messagerie: false }) }
+    end
+
+    context 'when there is a modification on private champs' do
+      before { dossier.champs_private.first.update_attribute('value', 'toto') }
+
+      it { is_expected.to match({ demande: false, annotations_privees: true, avis: false, messagerie: false }) }
+    end
+
+    context 'when there is a modification on avis' do
+      before { create(:avis, dossier: dossier) }
+
+      it { is_expected.to match({ demande: false, annotations_privees: false, avis: true, messagerie: false }) }
+    end
+
+    context 'messagerie' do
+      context 'when there is a new commentaire' do
+        before { create(:commentaire, dossier: dossier, email: 'a@b.com') }
+
+        it { is_expected.to match({ demande: false, annotations_privees: false, avis: false, messagerie: true }) }
+      end
+
+      context 'when there is a new commentaire issued by tps' do
+        before { create(:commentaire, dossier: dossier, email: 'contact@tps.apientreprise.fr') }
+
+        it { is_expected.to match({ demande: false, annotations_privees: false, avis: false, messagerie: false }) }
+      end
+    end
+  end
+
+  describe '#notification_for_procedure' do
+    let!(:dossier) { create(:dossier, :followed, state: 'initiated') }
+    let(:gestionnaire) { dossier.follows.first.gestionnaire }
+    let(:procedure) { dossier.procedure }
+    let!(:gestionnaire_2) { create(:gestionnaire, procedures: [procedure]) }
+
+    let!(:dossier_on_procedure_2) { create(:dossier, :followed, state: 'initiated') }
+    let!(:gestionnaire_on_procedure_2) { dossier_on_procedure_2.follows.first.gestionnaire }
+
+    before do
+      gestionnaire_2.followed_dossiers << dossier
+    end
+
+    subject { gestionnaire.notifications_for_procedure(procedure) }
+
+    context 'when the gestionnaire has just followed the dossier' do
+      it { is_expected.to match([]) }
+    end
+
+    context 'when there is a modification on public champs' do
+      before { dossier.champs.first.update_attribute('value', 'toto') }
+
+      it { is_expected.to match([dossier.id]) }
+      it { expect(gestionnaire_2.notifications_for_procedure(procedure)).to match([dossier.id]) }
+      it { expect(gestionnaire_on_procedure_2.notifications_for_procedure(procedure)).to match([]) }
+
+      context 'and there is a modification on private champs' do
+        before { dossier.champs_private.first.update_attribute('value', 'toto') }
+
+        it { is_expected.to match([dossier.id]) }
+      end
+
+      context 'when gestionnaire update it s public champs last seen' do
+        let(:follow) { gestionnaire.follows.find_by(dossier: dossier) }
+
+        before { follow.update_attribute('demande_seen_at', DateTime.now) }
+
+        it { is_expected.to match([]) }
+        it { expect(gestionnaire_2.notifications_for_procedure(procedure)).to match([dossier.id]) }
+      end
+    end
+
+    context 'when there is a modification on a piece justificative' do
+      before { dossier.pieces_justificatives << create(:piece_justificative, :contrat) }
+
+      it { is_expected.to match([dossier.id]) }
+    end
+
+    context 'when there is a modification on public champs on a followed dossier from another procedure' do
+      before { dossier_on_procedure_2.champs.first.update_attribute('value', 'toto') }
+
+      it { is_expected.to match([]) }
+    end
+
+    context 'when there is a modification on private champs' do
+      before { dossier.champs_private.first.update_attribute('value', 'toto') }
+
+      it { is_expected.to match([dossier.id]) }
+    end
+
+    context 'when there is a modification on avis' do
+      before { create(:avis, dossier: dossier) }
+
+      it { is_expected.to match([dossier.id]) }
+    end
+
+    context 'the messagerie' do
+      context 'when there is a new commentaire' do
+        before { create(:commentaire, dossier: dossier, email: 'a@b.com') }
+
+        it { is_expected.to match([dossier.id]) }
+      end
+
+      context 'when there is a new commentaire issued by tps' do
+        before { create(:commentaire, dossier: dossier, email: 'contact@tps.apientreprise.fr') }
+
+        it { is_expected.to match([]) }
+      end
+    end
+  end
+
+  describe '#notifications_per_procedure' do
+    let!(:dossier) { create(:dossier, :followed, state: 'initiated') }
+    let(:gestionnaire) { dossier.follows.first.gestionnaire }
+    let(:procedure) { dossier.procedure }
+
+    subject { gestionnaire.notifications_per_procedure }
+
+    context 'when there is a modification on public champs' do
+      before { dossier.champs.first.update_attribute('value', 'toto') }
+
+      it { is_expected.to match({ procedure.id => 1 }) }
+    end
+  end
+
+  describe '#mark_tab_as_seen' do
+    let!(:dossier) { create(:dossier, :followed, state: 'initiated') }
+    let(:gestionnaire) { dossier.follows.first.gestionnaire }
+    let(:freeze_date) { DateTime.parse('12/12/2012') }
+
+    context 'when demande is acknowledged' do
+      let(:follow) { gestionnaire.follows.find_by(dossier: dossier) }
+
+      before do
+        Timecop.freeze(freeze_date)
+        gestionnaire.mark_tab_as_seen(dossier, :demande)
+      end
+
+      it { expect(follow.demande_seen_at).to eq(freeze_date) }
+
+      after { Timecop.return }
+    end
+  end
 end
diff --git a/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb b/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb
index cd5d6730e..68ad70c78 100644
--- a/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb
+++ b/spec/views/new_gestionnaire/dossiers/show.html.haml_spec.rb
@@ -1,10 +1,12 @@
 describe 'new_gestionnaire/dossiers/show.html.haml', type: :view do
+  let(:current_gestionnaire) { create(:gestionnaire) }
   let(:individual) { nil }
   let(:entreprise) { nil }
   let(:dossier) { create(:dossier, :initiated, entreprise: entreprise, individual: individual) }
 
   before do
     assign(:dossier, dossier)
+    view.stub(:current_gestionnaire).and_return(current_gestionnaire)
     render
   end