diff --git a/spec/features/users/dossier_shared_examples.rb b/spec/features/users/dossier_shared_examples.rb
index d9c36a73b..84fe6a1ae 100644
--- a/spec/features/users/dossier_shared_examples.rb
+++ b/spec/features/users/dossier_shared_examples.rb
@@ -30,7 +30,7 @@ RSpec.shared_examples 'the user can send messages to the instructeur' do
     expect(page).to have_current_path(messagerie_dossier_path(dossier))
     expect(page).to have_content(commentaire.body)
 
-    fill_in 'commentaire_body', with: message_body
+    fill_in "messagerie-#{dossier.id}", with: message_body
     click_on 'Envoyer le message'
 
     expect(page).to have_current_path(messagerie_dossier_path(dossier))