diff --git a/ereuse_devicehub/resources/action/views.py b/ereuse_devicehub/resources/action/views.py
index a154164b..19e5ce30 100644
--- a/ereuse_devicehub/resources/action/views.py
+++ b/ereuse_devicehub/resources/action/views.py
@@ -30,7 +30,7 @@ def save_json(req_json):
     The file need to be saved with one name format with the stamptime and uuid joins
     """
     name_file = "{uuid}_{time}.json".format(uuid=req_json.get('uuid', ''), time=int(time()))
-    path_name = "{tmp}/{file}".format(tmp=TMP_SNAPSHOTS, file=name_file)
+    path_name = os.path.join(tmp=TMP_SNAPSHOTS, file=name_file)
 
     if not os.path.isdir(TMP_SNAPSHOTS):
         os.system('mkdir -p {}'.format(TMP_SNAPSHOTS))
diff --git a/tests/test_snapshot.py b/tests/test_snapshot.py
index 290a7e76..b3157d38 100644
--- a/tests/test_snapshot.py
+++ b/tests/test_snapshot.py
@@ -491,7 +491,7 @@ def test_save_snapshot_in_file():
 
     snapshot = {'software': '', 'version': '', 'uuid': ''}
     if files:
-        path_snapshot = "{dir}/{file}".format(dir=TMP_SNAPSHOTS, file=files[0])
+        path_snapshot = os.path.join(dir=TMP_SNAPSHOTS, file=files[0])
         file_snapshot = open(path_snapshot)
         snapshot = json.loads(file_snapshot.read())
         file_snapshot.close()
@@ -514,7 +514,7 @@ def test_backup_snapshot_with_errors(user: UserClient):
 
     files = [x for x in os.listdir(TMP_SNAPSHOTS) if uuid in x]
     if files:
-        path_snapshot = "{dir}/{file}".format(dir=TMP_SNAPSHOTS, file=files[0])
+        path_snapshot = os.path.join(dir=TMP_SNAPSHOTS, file=files[0])
         file_snapshot = open(path_snapshot)
         snapshot = json.loads(file_snapshot.read())
         file_snapshot.close()