diff --git a/tests/test_utils_snapshot.py b/tests/test_utils_snapshot.py
index 2783f7034..f2818b1c3 100644
--- a/tests/test_utils_snapshot.py
+++ b/tests/test_utils_snapshot.py
@@ -1,10 +1,10 @@
 import pytest
-from unittest.mock import patch, MagicMock
+from unittest.mock import patch
 from slic.utils.snapshot import snapshot
 from slic.core.adjustable import Adjustable
 
 class FakeAdjustable(Adjustable):
-    """Test double that doesn't register in real registry"""
+    """Mock implémentant toutes les méthodes abstraites"""
     def __init__(self, ID, name=None, internal=False):
         super().__init__(ID=ID, name=name or ID, internal=internal)
         self._value = 0
@@ -12,39 +12,37 @@ class FakeAdjustable(Adjustable):
     def get_current_value(self):
         return self._value
     
+    def is_moving(self):
+        return False
+    
+    def set_target_value(self, value, *args, **kwargs):
+        return value
+    
     def __repr__(self):
         return f"<Adjustable {self.name}>"
     
     def __str__(self):
         return self.name
 
-def test_id(val):
-    """Generate stable test IDs for all cases"""
-    # val is the entire parameter tuple (test_input, expected, kwargs)
-    if not val[1]:  # Empty expected list
-        return "empty"
-    if isinstance(val[1][0], str):
-        if val[2].get('include_internal'):
-            return "include_internals"
-        if 'sort_key' in val[2]:
-            return f"sort_{val[2]['sort_key'].__name__}"
-        return val[1][0].lower()
-    return str(val[1][0])
-
+# Tous les cas de test avec IDs explicites
 test_cases = [
-    # Basic functionality
+    # Exclusion des internes par défaut
     pytest.param(
         [("v1", "Visible", False), ("h1", "Hidden", True)],
         ["Visible"],
         {},
         id="exclude_internals"
     ),
+    
+    # Inclusion des internes
     pytest.param(
         [("v1", "Visible", False), ("h1", "Hidden", True)],
         ["Visible", "Hidden"],
         {"include_internal": True},
         id="include_internals"
     ),
+    
+    # Cas vide
     pytest.param(
         [],
         [],
@@ -52,22 +50,22 @@ test_cases = [
         id="empty_case"
     ),
     
-    # Sorting variants
+    # Tous les types de tri
     pytest.param(
         [("3", "C"), ("1", "A"), ("2", "B")],
         ["A", "B", "C"],
         {"sort_key": repr},
-        id="sort_repr"
+        id="sort_by_repr"
     ),
     pytest.param(
         [("3", "C"), ("1", "A"), ("2", "B")],
         ["A", "B", "C"],
         {"sort_key": str},
-        id="sort_str"
+        id="sort_by_str"
     ),
     pytest.param(
-        [("3", "C"), ("1", "A"), ("2", "B")],
-        ["A", "B", "C"],
+        [("3", "Z"), ("1", "A"), ("2", "M")],
+        ["A", "M", "Z"],
         {"sort_key": lambda a: a.ID},
         id="sort_by_id"
     ),
@@ -82,30 +80,29 @@ test_cases = [
         ["A", "BB", "CCC"],
         {"sort_key": lambda a: len(a.name)},
         id="sort_by_length"
+    ),
+    pytest.param(
+        [("2", "B", False), ("3", "C", True), ("1", "A", False)],
+        ["A", "B", "C"],
+        {"sort_key": lambda a: (a.internal, a.name)},
+        id="sort_by_internal_then_name"
     )
 ]
 
 @pytest.mark.parametrize("test_input,expected,kwargs", test_cases)
 def test_snapshot(test_input, expected, kwargs):
-    """Complete test with proper instance mocking"""
-    # Create test objects
-    test_objects = [FakeAdjustable(*args) for args in test_input]
+    """Test complet avec isolation et tous les types de tri"""
+    # Création des objets
+    test_objs = [FakeAdjustable(*x) for x in test_input]
     
-    # Mock the registry system
-    with patch('slic.utils.registry.instances') as mock_instances, \
-         patch('slic.core.adjustable.Adjustable._instances', new_callable=MagicMock) as mock_adj:
-        
-        # Configure mocks
-        mock_instances.return_value = test_objects
-        mock_adj.return_value = test_objects
-        
-        # Execute
+    # Mocking
+    with patch('slic.utils.registry.instances', return_value=test_objs):
         result = snapshot(**kwargs)
         
-        # Verify
-        if "sort_key" in kwargs:
-            # For sorting tests
+        # Vérification adaptée au type de test
+        if kwargs.get('include_internal'):
+            assert len(result) == len(expected)
+        if 'sort_key' in kwargs:
             assert [x.name for x in result] == expected
         else:
-            # For filtering tests
             assert {x.name for x in result} == set(expected)
\ No newline at end of file