diff --git a/backend/.pylintrc b/backend/.pylintrc
index db084dd..706cf02 100644
--- a/backend/.pylintrc
+++ b/backend/.pylintrc
@@ -402,7 +402,7 @@ preferred-modules=
 
 # The type of string formatting that logging methods do. `old` means using %
 # formatting, `new` is for `{}` formatting.
-logging-format-style=old
+logging-format-style=new
 
 # Logging modules to check that the string format arguments are in logging
 # function parameter format.
diff --git a/backend/src/cache.py b/backend/src/cache.py
index 97f9bb7..dffc222 100644
--- a/backend/src/cache.py
+++ b/backend/src/cache.py
@@ -70,6 +70,6 @@ else:
         MEMCACHED_HOST_PATH,
         timeout=1,
         allow_unicode_keys=True,
-        encoding='utf-8', 
+        encoding='utf-8',
         serde=serde.pickle_serde
     )
diff --git a/backend/src/logging_config.py b/backend/src/logging_config.py
index c43a246..c59d6d3 100644
--- a/backend/src/logging_config.py
+++ b/backend/src/logging_config.py
@@ -22,7 +22,7 @@ def configure_logging():
         loki_url = "http://localhost:3100/loki/api/v1/push"
         if loki_url is None:
             raise ValueError("LOKI_URL environment variable is not set")
-        
+
         loki_handler = LokiLoggerHandler(
             url = loki_url,
             labels = {'app': 'anyway', 'environment': 'staging' if is_debug else 'production'}
@@ -55,4 +55,3 @@ def configure_logging():
     logging.getLogger('uvicorn').handlers = logging_handlers
     logging.getLogger('uvicorn.access').handlers = logging_handlers
     logging.getLogger('uvicorn.error').handlers = logging_handlers
-
diff --git a/backend/src/main.py b/backend/src/main.py
index b1c865b..b7f796c 100644
--- a/backend/src/main.py
+++ b/backend/src/main.py
@@ -2,8 +2,8 @@
 
 import logging
 import time
-from fastapi import FastAPI, HTTPException, Query
 from contextlib import asynccontextmanager
+from fastapi import FastAPI, HTTPException, Query
 
 from .logging_config import configure_logging
 from .structs.landmark import Landmark, Toilets
diff --git a/backend/src/structs/landmark.py b/backend/src/structs/landmark.py
index da0f122..b320f49 100644
--- a/backend/src/structs/landmark.py
+++ b/backend/src/structs/landmark.py
@@ -136,7 +136,9 @@ class Toilets(BaseModel) :
             str: A formatted string with the toilets location.
         """
         return f'Toilets @{self.location}'
-    
+
     class Config:
-        # This allows us to easily convert the model to and from dictionaries
-        from_attributes = True
\ No newline at end of file
+        """
+        This allows us to easily convert the model to and from dictionaries
+        """
+        from_attributes = True
diff --git a/backend/src/tests/test_cache.py b/backend/src/tests/test_cache.py
index d2cfaca..6994a6c 100644
--- a/backend/src/tests/test_cache.py
+++ b/backend/src/tests/test_cache.py
@@ -13,7 +13,7 @@ def client():
     return TestClient(app)
 
 
-def test_cache(client, request):    # pylint: disable=redefined-outer-name
+def test_cache(client):    # pylint: disable=redefined-outer-name
     """
     Test n°1 : Custom test in Turckheim to ensure small villages are also supported.
 
diff --git a/backend/src/tests/test_main.py b/backend/src/tests/test_main.py
index 0759f1e..c2e49cf 100644
--- a/backend/src/tests/test_main.py
+++ b/backend/src/tests/test_main.py
@@ -1,9 +1,9 @@
 """Collection of tests to ensure correct implementation and track progress. """
-
+import time
 from fastapi.testclient import TestClient
-import pytest, time
+import pytest
 
-from .test_utils import landmarks_to_osmid, load_trip_landmarks, log_trip_details
+from .test_utils import load_trip_landmarks, log_trip_details
 from ..main import app
 
 @pytest.fixture(scope="module")
diff --git a/backend/src/tests/test_toilets.py b/backend/src/tests/test_toilets.py
index 29d9f06..90ea5ea 100644
--- a/backend/src/tests/test_toilets.py
+++ b/backend/src/tests/test_toilets.py
@@ -6,11 +6,13 @@ import pytest
 from ..structs.landmark import Toilets
 from ..main import app
 
+
 @pytest.fixture(scope="module")
 def client():
     """Client used to call the app."""
     return TestClient(app)
 
+
 @pytest.mark.parametrize(
     "location,radius,status_code",
     [
@@ -39,8 +41,6 @@ def test_invalid_input(client, location, radius, status_code):    # pylint: disa
     assert response.status_code == status_code
 
 
-
-
 @pytest.mark.parametrize(
     "location,status_code",
     [
@@ -66,11 +66,10 @@ def test_no_toilets(client, location, status_code):    # pylint: disable=redefin
     toilets_list = [Toilets.model_validate(toilet) for toilet in response.json()]
 
     # checks :
-    assert response.status_code == 200  # check for successful planning
+    assert response.status_code == status_code  # check for successful planning
     assert isinstance(toilets_list, list)  # check that the return type is a list
 
 
-
 @pytest.mark.parametrize(
     "location,status_code",
     [
@@ -97,6 +96,6 @@ def test_toilets(client, location, status_code):    # pylint: disable=redefined-
     toilets_list = [Toilets.model_validate(toilet) for toilet in response.json()]
 
     # checks :
-    assert response.status_code == 200  # check for successful planning
+    assert response.status_code == status_code  # check for successful planning
     assert isinstance(toilets_list, list)  # check that the return type is a list
-    assert len(toilets_list) > 0
\ No newline at end of file
+    assert len(toilets_list) > 0
diff --git a/backend/src/tests/test_utils.py b/backend/src/tests/test_utils.py
index 2f266ce..68d4fb8 100644
--- a/backend/src/tests/test_utils.py
+++ b/backend/src/tests/test_utils.py
@@ -45,19 +45,19 @@ def fetch_landmark(client, landmark_uuid: str):
         logger.info(f'API Response: {json_data}')
     except ValueError as e:
         logger.error(f'Failed to parse response as JSON: {response.text}')
-        raise HTTPException(status_code=500, detail="Invalid response format from API")
+        raise HTTPException(status_code=500, detail="Invalid response format from API") from e
 
     # Try validating against the Landmark model here to ensure consistency
     try:
         landmark = Landmark(**json_data)
     except ValidationError as ve:
         logging.error(f'Validation error: {ve}')
-        raise HTTPException(status_code=500, detail="Invalid data format received from API")
+        raise HTTPException(status_code=500, detail="Invalid data format received from API") from ve
 
     if "detail" in json_data:
         raise HTTPException(status_code=500, detail=json_data["detail"])
 
-    return Landmark(**json_data)
+    return landmark
 
 
 def fetch_landmark_cache(landmark_uuid: str):