diff --git a/Makefile b/Makefile
index 1cae41e..5756e3f 100644
--- a/Makefile
+++ b/Makefile
@@ -22,16 +22,19 @@ kill_server:
 dev_serve:
 	poetry run  uvicorn papi.main:app --reload
 
+cleandb:
+	rm sql_app.db || echo ls
+
 .ONESHELL:
-test:
+test: cleandb
 	poetry run pytest --cov=.  --cov-report=term-missing:skip-covered .
 
 
 .ONESHELL:
-dtest:
+dtest: cleandb
 	poetry run pytest -s --pdb --cov=.  --cov-report=term-missing:skip-covered .
 
 .ONESHELL:
-qtest:
+qtest: cleandb
 	poetry run pytest -sxv --ff --lf .
 
diff --git a/papi/main.py b/papi/main.py
index 857f580..e35b033 100644
--- a/papi/main.py
+++ b/papi/main.py
@@ -131,9 +131,9 @@ def historique(idsonde):
     print(len(mesures[idsonde]))
 
     for previous, present in zip(mesures[idsonde], mesures[idsonde][1:]):
-        date = present["date"]
-        previous = utils.prepare(previous)
-        present = utils.prepare(present)
+        date = present.content["date"]
+        previous = utils.prepare(previous.content)
+        present = utils.prepare(present.content)
         all_channels = sorted(set((*previous["channels"], *present["channels"])))
 
         diff = utils.compare(all_channels, previous, present)
diff --git a/papi/sqlapp/crud.py b/papi/sqlapp/crud.py
index c683098..5018e20 100644
--- a/papi/sqlapp/crud.py
+++ b/papi/sqlapp/crud.py
@@ -4,9 +4,9 @@ from . import models
 
 
 def get_sonde(db: Session, identifiant: str):
-    return (
-        db.query(models.Sonde).filter(models.Sonde.identifiant == identifiant).first()
-    )
+    q = db.query(models.Sonde)
+    q = q.filter(models.Sonde.identifiant == identifiant)
+    return q.first()
 
 
 def create_sonde(db: Session, identifiant: str, nom: str):
@@ -25,5 +25,9 @@ def create_mesure(db: Session, sonde_id: int, content: dict):
     return db_mesure
 
 
-def get_mesure(db: Session, sonde_id: int):
-    return db.query(models.Mesure).filter(models.Mesure.sonde_id == sonde_id).all()
+def get_mesure(db: Session, sonde_id: int, only_last=False):
+    q = db.query(models.Mesure).filter(models.Mesure.sonde_id == sonde_id)
+    if not only_last:
+        return q.all()
+    else:
+        return [q.all()[-1]]  # order by id desc limit 1