diff --git a/tests/test_utils_pvpreload.py b/tests/test_utils_pvpreload.py
index a34a889b1..7711a4e5c 100644
--- a/tests/test_utils_pvpreload.py
+++ b/tests/test_utils_pvpreload.py
@@ -142,6 +142,26 @@ def test_preload_old_file(tmp_path, caplog):
     # Vérifie que le PV n’a pas été créé (pas dans le cache)
     assert not is_pv_in_cache(pvname)
 
+def test_preload_fichier_corrompu(tmp_path, caplog):
+    configure_logzero_for_pytest(caplog)
+
+    f = tmp_path / "corrupt.pkl"
+
+    # Écrit un fichier non valide (pas du pickle)
+    with open(f, "w") as fcorrupt:
+        fcorrupt.write("not a pickle at all")
+
+    # Patch le chemin du fichier dans preload
+    with pytest.MonkeyPatch().context() as mp:
+        mp.setattr("slic.utils.pvpreload.fn", f)
+
+        with caplog.at_level("WARNING"):
+            preload()
+
+    logs = "\n".join(caplog.messages)
+    assert "PV preload file not loaded due to: UnpicklingError:" in logs
+
+
 # offload()
 def test_offload(tmp_path, caplog):