diff --git a/modules/caissedepargne/browser.py b/modules/caissedepargne/browser.py
index ac14cc1b3dbbad930ec0724fcc8fb682a374349e..34d48ef1fbfc7b51390ae35e301dd686b21f9a44 100644
--- a/modules/caissedepargne/browser.py
+++ b/modules/caissedepargne/browser.py
@@ -929,6 +929,7 @@ def otp_sms_continue_transfer(self, transfer, **params):
         if self.transfer.is_here():
             self.page.continue_transfer(transfer.account_label, transfer.recipient_label, transfer.label)
             return self.page.update_transfer(transfer)
+        assert False, 'Blank page instead of the TransferPage'
 
     @need_login
     def execute_transfer(self, transfer):