diff --git a/test/tools.py b/test/tools.py
index 8bef76b..b7c3a5d 100644
--- a/test/tools.py
+++ b/test/tools.py
@@ -9,6 +9,9 @@ here = pathlib.Path(__file__).parent
 
 def getjson(name: str) -> bytes:
     path = here / "json" / f"{name}.json"
+    if not path.exists():
+        raise Exception(f"path doesnt exist : {path}")
+
     with path.open() as f:
         return f.read().encode("utf-8")
 
@@ -23,4 +26,5 @@ def my_mock(mocker: MockerFixture, json_file: str, status: int) -> None:
     def mock_rest_api(self: PatroniResource, service: str) -> MockApiReturnCode:
         return MockApiReturnCode(getjson(json_file), status)
 
+    mocker.resetall()
     mocker.patch("check_patroni.types.PatroniResource.rest_api", mock_rest_api)