diff --git a/app/models/procedure.rb b/app/models/procedure.rb
index 14c489861..168c486ec 100644
--- a/app/models/procedure.rb
+++ b/app/models/procedure.rb
@@ -653,7 +653,7 @@ class Procedure < ApplicationRecord
       result << :service
     end
 
-    if service_test?
+    if service_siret_test?
       result << :service
     end
 
@@ -689,7 +689,7 @@ class Procedure < ApplicationRecord
     end
   end
 
-  def service_test?
+  def service_siret_test?
     service&.siret == Service::SIRET_TEST
   end
 
diff --git a/app/models/service.rb b/app/models/service.rb
index 78f15b777..67d6ac761 100644
--- a/app/models/service.rb
+++ b/app/models/service.rb
@@ -22,6 +22,7 @@ class Service < ApplicationRecord
   validates :nom, uniqueness: { scope: :administrateur, message: 'existe déjà' }
   validates :organisme, presence: { message: 'doit être renseigné' }, allow_nil: false
   validates :siret, siret_format: true
+  validates :siret, comparison: { other_than: SIRET_TEST, message: "n'est pas valide" }, on: :update
   validates :type_organisme, presence: { message: 'doit être renseigné' }, allow_nil: false
   validates :email, presence: { message: 'doit être renseigné' }, allow_nil: false
   validates :telephone, phone: { possible: true, allow_blank: true }
diff --git a/app/views/administrateurs/procedures/publication.html.haml b/app/views/administrateurs/procedures/publication.html.haml
index 6549a22fd..9248dc2b6 100644
--- a/app/views/administrateurs/procedures/publication.html.haml
+++ b/app/views/administrateurs/procedures/publication.html.haml
@@ -46,8 +46,8 @@
                       %li= link_to("des instructeurs", admin_procedure_groupe_instructeur_path(@procedure, @procedure.defaut_groupe_instructeur))
                     - if @procedure.service.nil?
                       %li= link_to("un service", admin_services_path(procedure_id: @procedure))
-                    - if @procedure.service_test?
-                      %li= link_to("un service valide", admin_services_path(procedure_id: @procedure))
+                    - if @procedure.service_siret_test?
+                      %li= link_to("un service avec un SIRET valide", admin_services_path(procedure_id: @procedure))
               = link_to t('.back_to_procedure'), admin_procedure_path(id: @procedure), class: 'fr-btn fr-btn--secondary fr-btn--icon-left fr-icon-arrow-go-back-line fr-mt-2w'
 
           - else
diff --git a/spec/models/service_spec.rb b/spec/models/service_spec.rb
index 74b6cad79..decd6e07d 100644
--- a/spec/models/service_spec.rb
+++ b/spec/models/service_spec.rb
@@ -89,6 +89,15 @@ describe Service, type: :model do
     end
   end
 
+  describe 'validation on update' do
+    subject { create(:service) }
+
+    it 'should not allow to have a test siret' do
+      subject.siret = Service::SIRET_TEST
+      expect(subject).not_to be_valid
+    end
+  end
+
   describe "etablissement adresse & geo coordinates" do
     subject { create(:service, etablissement_lat: latitude, etablissement_lng: longitude, etablissement_infos: etablissement_infos) }