diff --git a/app/controllers/users/dossiers_controller.rb b/app/controllers/users/dossiers_controller.rb
index 4c30d3344..48d1c27ce 100644
--- a/app/controllers/users/dossiers_controller.rb
+++ b/app/controllers/users/dossiers_controller.rb
@@ -43,7 +43,7 @@ class Users::DossiersController < UsersController
 
   def commencer_test
     procedure_path = ProcedurePath.find_by(path: params[:procedure_path])
-    procedure = procedure_path.test_procedure
+    procedure = procedure_path&.test_procedure
 
     if procedure.present?
       redirect_to new_users_dossier_path(procedure_id: procedure.id)
@@ -55,7 +55,7 @@ class Users::DossiersController < UsersController
 
   def commencer
     procedure_path = ProcedurePath.find_by(path: params[:procedure_path])
-    procedure = procedure_path.procedure
+    procedure = procedure_path&.procedure
 
     if procedure.present?
       if procedure.archivee?
diff --git a/spec/controllers/users/dossiers_controller_spec.rb b/spec/controllers/users/dossiers_controller_spec.rb
index 8eff31ad1..216d82fa0 100644
--- a/spec/controllers/users/dossiers_controller_spec.rb
+++ b/spec/controllers/users/dossiers_controller_spec.rb
@@ -152,7 +152,8 @@ describe Users::DossiersController, type: :controller do
   end
 
   describe 'GET #commencer' do
-    subject { get :commencer, params: { procedure_path: procedure.path } }
+    subject { get :commencer, params: { procedure_path: path } }
+    let(:path) { procedure.path }
 
     it { expect(subject.status).to eq 302 }
     it { expect(subject).to redirect_to new_users_dossier_path(procedure_id: procedure.id) }
@@ -172,6 +173,12 @@ describe Users::DossiersController, type: :controller do
 
       it { expect(subject).to redirect_to(root_path) }
     end
+
+    context 'when procedure path dose not exist' do
+      let(:path) { 'hello' }
+
+      it { expect(subject).to redirect_to(root_path) }
+    end
   end
 
   describe 'POST #siret_informations' do