diff --git a/backend/src/tests/test_main.py b/backend/src/tests/test_main.py
index 9517efe..b389376 100644
--- a/backend/src/tests/test_main.py
+++ b/backend/src/tests/test_main.py
@@ -3,6 +3,23 @@ import pytest, requests
 from ..main import app
 from ..structs.landmark import Landmark
 
+
+def landmarks_to_osmid(landmarks: list) -> list :
+    """
+    Convert the list of landmarks into a list containing their osm ids for quick landmark checking.
+    
+    Args :
+        landmarks (list): the list of landmarks
+    
+    Returns :
+        ids (list)      : the list of corresponding OSM ids
+    """
+    ids = []
+    for landmark in landmarks :
+        ids.append(landmark.osm_id)
+
+    return ids
+
 def fetch_landmark(client, landmark_uuid):
     """
     Fetch landmark data from the API based on the landmark UUID.
@@ -31,24 +48,19 @@ def load_trip_landmarks(client, first_uuid):
     Load all landmarks for a trip using the response from the API.
 
     Args:
-        first_uuid (str): The first UUID of the landmark.
+        first_uuid (str) : The first UUID of the landmark.
 
     Returns:
-        LinkedLandmarks: An object containing all linked landmarks for the trip.
+        landmarks (list) : An list containing all landmarks for the trip.
     """
     landmarks = []
     next_uuid = first_uuid
 
-    i = 0
-
     while next_uuid is not None:
         landmark_data = fetch_landmark(client, next_uuid)
-        landmarks.append(Landmark(**landmark_data))  # Create Landmark objects
+        landmarks.append(Landmark(**landmark_data)) # Create Landmark objects
+        next_uuid = landmark_data.get('next_uuid')  # Prepare for the next iteration
 
-        # Prepare for the next iteration
-        next_uuid = landmark_data.get('next_uuid')  # Assuming landmark data contains 'next_uuid'
-
-    # Create and return a LinkedLandmarks object with the collected landmarks
     return landmarks
 
 
@@ -57,6 +69,7 @@ def client():
     return TestClient(app)
 
 
+# Base test for checking if the API returns correct error code when no preferences are specified.
 def test_new_trip_invalid_prefs(client):
     response = client.post(
         "/trip/new",
@@ -67,7 +80,9 @@ def test_new_trip_invalid_prefs(client):
         )
     assert response.status_code == 422
 
-def test_1(client):
+    
+# Test no. 1
+def test_turckheim(client):
     response = client.post(
         "/trip/new",
         json={
@@ -75,16 +90,29 @@ def test_1(client):
             "start": [48.084588, 7.280405]
             }
         )
-    
-    # check for successful planning
-    assert response.status_code == 200
-
     result = response.json()
-
     landmarks = load_trip_landmarks(client, result['first_landmark_uuid'])
 
-    assert isinstance(landmarks, list)
-    assert len(landmarks) > 2
+    # checks :
+    assert response.status_code == 200  # check for successful planning
+    assert isinstance(landmarks, list)  # check that the return type is a list
+    assert len(landmarks) > 2           # check that there is something to visit
+
+def test_bellecour(client) :
+    response = client.post(
+        "/trip/new",
+        json={
+            "preferences": {"sightseeing": {"type": "sightseeing", "score": 5}, "nature": {"type": "nature", "score": 5}, "shopping": {"type": "shopping", "score": 5}, "max_time_minute": 35, "detour_tolerance_minute": 0},
+            "start": [45.7576485, 4.8330241]
+            }
+        )
+    result = response.json()
+    landmarks = load_trip_landmarks(client, result['first_landmark_uuid'])
+    osm_ids = landmarks_to_osmid(landmarks)
+
+    # checks :
+    assert response.status_code == 200  # check for successful planning
+    assert 136200148 in osm_ids         # check for Cathédrale St. Jean in trip