diff --git a/tests/test_utils_pvpreload.py b/tests/test_utils_pvpreload.py
index 5793fefae..19b07a6d6 100644
--- a/tests/test_utils_pvpreload.py
+++ b/tests/test_utils_pvpreload.py
@@ -28,13 +28,15 @@ from morbidissimo import MorIOC
 def run_test_ioc():
     def ioc():
         with MorIOC("TEST") as mor:
-            mor.host(PV1=float, PV2=float, PV3=float, PV4=float)
+            mor.host(PV1=float, PV2=float, PV3=float, PV4=float, PV5=float, PV6=float)
             while True:
                 mor.serve(
                     PV1=1.0,
                     PV2=2.0,
                     PV3=3.0,
-                    PV4=4.0
+                    PV4=4.0,
+                    PV5=5.0,
+                    PV6=6.0
                 )
                 time.sleep(0.1)
 
@@ -253,3 +255,45 @@ def test_offload_exception(tmp_path, caplog):
 
     logs = "\n".join(caplog.messages)
     assert "PV preload file not saved due to: IsADirectoryError:" in logs
+
+def test_pvpreload_end_to_end(tmp_path, caplog):
+
+    configure_logzero_for_pytest(caplog)
+
+    preload_file = tmp_path / "end2end.pkl"
+
+    # Patch preload/offload pour utiliser le bon fichier et un petit délai
+    with pytest.MonkeyPatch().context() as mp:
+        mp.setattr("slic.utils.pvpreload.fn", preload_file)
+        mp.setattr("slic.utils.pvpreload.delay", 0.05)
+
+        # Lancer le thread une bonne fois pour toutes
+        with caplog.at_level("DEBUG"):
+            pvpreload()
+
+        # Étape 1 : Crée PV5 et attend offload
+        pvname_5 = "TEST:PV5"
+        pv_5 = get_pv(pvname_5, connect=True)
+        assert pv_5.wait_for_connection(timeout=2)
+        time.sleep(0.2)  # Laisser le offload le capturer
+
+        assert preload_file.exists(), "Fichier non créé après offload"
+        names = std_pickle.load(open(preload_file, "rb"))
+        assert pvname_5 in names, f"{pvname_5} absent du fichier"
+
+        # Étape 2 : Injecte PV6 dans le fichier pour le prochain preload
+        pvname_6 = "TEST:PV6"
+        with open(preload_file, "wb") as f:
+            std_pickle.dump([pvname_6], f)
+
+        epics.pv._PVcache_.clear()
+        assert not is_pv_in_cache(pvname_6)
+
+        # Attendre que le prochain preload recharge PV6
+        time.sleep(0.2)
+        assert is_pv_in_cache(pvname_6), "PV6 non rechargé par preload"
+
+        # Vérifie les logs
+        logs = "\n".join(caplog.messages)
+        assert "PV preload done" in logs
+        assert "PV offload done" in logs