diff --git a/tests/dashboard/test_custom_alias.py b/tests/dashboard/test_custom_alias.py
index cb3ad09f..fdfc8a60 100644
--- a/tests/dashboard/test_custom_alias.py
+++ b/tests/dashboard/test_custom_alias.py
@@ -7,14 +7,18 @@ from tests.utils import login
 
 
 def test_add_alias_success(flask_client):
-    login(flask_client)
+    user = login(flask_client)
     db.session.commit()
 
     word = random_word()
 
     r = flask_client.post(
         url_for("dashboard.custom_alias"),
-        data={"prefix": "prefix", "suffix": f".{word}@{EMAIL_DOMAIN}"},
+        data={
+            "prefix": "prefix",
+            "suffix": f".{word}@{EMAIL_DOMAIN}",
+            "mailbox": user.email,
+        },
         follow_redirects=True,
     )