diff --git a/src/db.py b/src/db.py
index 9e3f24f..c4d0892 100644
--- a/src/db.py
+++ b/src/db.py
@@ -128,7 +128,7 @@ def _ensure_database() -> Path:
             else:
                 logger.debug("Base de données déjà disponible et à jour.")
         except Exception as e:
-            if db_exists:
+            if db_exists and db_path.exists():
                 logger.error(
                     f"Bootstrap données KO ({e}). "
                     f"Réutilisation du DuckDB existant : {db_path}"
diff --git a/tests/test_db.py b/tests/test_db.py
index 865da05..56dee54 100644
--- a/tests/test_db.py
+++ b/tests/test_db.py
@@ -340,7 +340,8 @@ def test_ensure_database_reuses_db_when_build_raises(tmp_path, monkeypatch):
     monkeypatch.setenv("DATA_FILE_PARQUET_PATH", "http://unreachable")
     monkeypatch.setattr(db, "should_rebuild", lambda *a, **k: True)
     monkeypatch.setattr(db, "build_database", _raise)
-    db._ensure_database()  # ne doit pas lever
+    result = db._ensure_database()  # ne doit pas lever
+    assert result == dbf
     assert dbf.read_bytes() == b"existing"