diff --git a/app/models/batch_operation.rb b/app/models/batch_operation.rb
index 07e3c113d..f6abad9b1 100644
--- a/app/models/batch_operation.rb
+++ b/app/models/batch_operation.rb
@@ -82,13 +82,13 @@ class BatchOperation < ApplicationRecord
     when BatchOperation.operations.fetch(:desarchiver)
       dossier.desarchiver!
     when BatchOperation.operations.fetch(:passer_en_instruction)
-      dossier.passer_en_instruction(instructeur: instructeur)
+      dossier.passer_en_instruction!(instructeur: instructeur)
     when BatchOperation.operations.fetch(:accepter)
-      dossier.accepter(instructeur: instructeur, motivation: motivation, justificatif: justificatif_motivation)
+      dossier.accepter!(instructeur: instructeur, motivation: motivation, justificatif: justificatif_motivation)
     when BatchOperation.operations.fetch(:refuser)
-      dossier.refuser(instructeur: instructeur, motivation: motivation, justificatif: justificatif_motivation)
+      dossier.refuser!(instructeur: instructeur, motivation: motivation, justificatif: justificatif_motivation)
     when BatchOperation.operations.fetch(:classer_sans_suite)
-      dossier.classer_sans_suite(instructeur: instructeur, motivation: motivation, justificatif: justificatif_motivation)
+      dossier.classer_sans_suite!(instructeur: instructeur, motivation: motivation, justificatif: justificatif_motivation)
     when BatchOperation.operations.fetch(:follow)
       instructeur.follow(dossier)
     when BatchOperation.operations.fetch(:repousser_expiration)
diff --git a/spec/models/batch_operation_spec.rb b/spec/models/batch_operation_spec.rb
index 8120c122c..da24e7b38 100644
--- a/spec/models/batch_operation_spec.rb
+++ b/spec/models/batch_operation_spec.rb
@@ -233,6 +233,26 @@ describe BatchOperation, type: :model do
     end
   end
 
+  describe '#process_one' do
+    let(:dossier) { create(:dossier, :en_instruction, :with_individual) }
+    subject { create(:batch_operation, operation, instructeur: create(:instructeur)) }
+
+    context 'accepter' do
+      let(:operation) { :accepter }
+      it { expect { subject.process_one(dossier) }.to have_enqueued_job.on_queue(Rails.application.config.action_mailer.deliver_later_queue_name) }
+    end
+
+    context 'refuser' do
+      let(:operation) { :refuser }
+      it { expect { subject.process_one(dossier) }.to have_enqueued_job.on_queue(Rails.application.config.action_mailer.deliver_later_queue_name) }
+    end
+
+    context 'classer_sans_suite' do
+      let(:operation) { :classer_sans_suite }
+      it { expect { subject.process_one(dossier) }.to have_enqueued_job.on_queue(Rails.application.config.action_mailer.deliver_later_queue_name) }
+    end
+  end
+
   describe 'stale' do
     let(:finished_at) { 6.hours.ago }
     let(:staled_batch_operation) { create(:batch_operation, operation: :archiver, finished_at: 2.days.ago, updated_at: 2.days.ago) }