diff --git a/src/commercetools/testing/customers.py b/src/commercetools/testing/customers.py
index 78139598..5e39fe85 100644
--- a/src/commercetools/testing/customers.py
+++ b/src/commercetools/testing/customers.py
@@ -29,6 +29,7 @@ def _create_from_draft(
             version=1,
             created_at=now,
             last_modified_at=now,
+            authentication_mode=models.AuthenticationMode.PASSWORD,
             customer_number=draft.customer_number,
             email=draft.email,
             password=draft.password,