diff --git a/papi/main.py b/papi/main.py
index 20b08b5..a647e07 100644
--- a/papi/main.py
+++ b/papi/main.py
@@ -11,6 +11,7 @@ app = FastAPI()
 
 
 mesures = defaultdict(list)
+notifications = defaultdict(list)
 
 
 class Sonde(BaseModel):
@@ -45,7 +46,7 @@ def list_sonde():
 
 @app.get("/notifications/{idsonde}/")
 def list_notification(idsonde: str):
-    return [notifications[idsonde][::-1]]
+    return notifications[idsonde][::-1]
 
 
 @app.post("/sonde/{idsonde}/")
diff --git a/tests/test_papi.py b/tests/test_papi.py
index 10bce9f..767dd55 100644
--- a/tests/test_papi.py
+++ b/tests/test_papi.py
@@ -143,7 +143,7 @@ def test_onchange_notification():
 
     notifs = client.get(f"/notifications/{id_sonde}/")
     assert notifs.ok
-    assert len(notifs) == 1
+    assert len(notifs.json()) == 1
 
 
 class CodeCoverageTestCase(TestCase):