diff --git a/tests/test_utils_run_later.py b/tests/test_utils_run_later.py
index 27c623cc..d5be9a8b 100644
--- a/tests/test_utils_run_later.py
+++ b/tests/test_utils_run_later.py
@@ -1,50 +1,23 @@
 import pytest
 from datetime import datetime, timedelta
 from slic.utils.run_later import run_at, run_in, run_later, today, tomorrow, yesterday
+from freezegun import freeze_time
+
 
-# Dummy progress bar replacement
 class DummyBar:
     def __enter__(self): return self
     def __exit__(self, *a): pass
     def set(self, val): pass
 
-# Fake datetime module wrapper
-class FakeDateTimeModule:
-    def __init__(self, now):
-        self._now = now
 
-    def now(self):
-        return self._now
-
-    def advance(self, seconds):
-        self._now += timedelta(seconds=seconds)
-
-    def __getattr__(self, attr):
-        from datetime import datetime as real_datetime
-        return getattr(real_datetime, attr)
-
-
-@pytest.fixture
-def clock(monkeypatch):
-    # Initial fake datetime
-    fake_dt = FakeDateTimeModule(datetime(2025, 1, 1, 6, 0, 0))
-
-    # Patch the target module's datetime, sleep, tqdm, today/tomorrow/yesterday
-    monkeypatch.setattr("slic.utils.run_later.datetime", fake_dt)
+@pytest.fixture(autouse=True)
+def patch_sleep(monkeypatch):
     monkeypatch.setattr("slic.utils.run_later.sleep", lambda x: None)
     monkeypatch.setattr("slic.utils.run_later.tqdm_mod", lambda *a, **k: DummyBar())
 
-    monkeypatch.setattr("slic.utils.run_later.today", lambda *args, **kwargs:
-        datetime(fake_dt.now().year, fake_dt.now().month, fake_dt.now().day, *args, **kwargs))
-    monkeypatch.setattr("slic.utils.run_later.tomorrow", lambda *args, **kwargs:
-        datetime(fake_dt.now().year, fake_dt.now().month, fake_dt.now().day, *args, **kwargs) + timedelta(days=1))
-    monkeypatch.setattr("slic.utils.run_later.yesterday", lambda *args, **kwargs:
-        datetime(fake_dt.now().year, fake_dt.now().month, fake_dt.now().day, *args, **kwargs) - timedelta(days=1))
 
-    return fake_dt
-
-
-def test_run_at(clock):
+@freeze_time("2025-01-01 06:00:00")
+def test_run_at():
     triggered = []
     def fexample(label): triggered.append(label)
 
@@ -52,9 +25,9 @@ def test_run_at(clock):
     run_at(today(6, 30), fexample, "not yet")
     assert "not yet" not in triggered
 
-    # Moment déclenché
-    clock.advance(31 * 60)
-    run_at(today(6, 30), fexample, "now OK")
+    # Avancer le temps
+    with freeze_time("2025-01-01 06:31:00"):
+        run_at(today(6, 30), fexample, "now OK")
     assert "now OK" in triggered
 
     # Trop tard
@@ -62,40 +35,38 @@ def test_run_at(clock):
     assert "too late" not in triggered
 
 
-def test_run_in(clock):
+@freeze_time("2025-01-01 12:00:00")
+def test_run_in():
     triggered = []
     def fexample(label): triggered.append(label)
 
-    clock._now = datetime(2025, 1, 1, 12, 0, 0)
-
     # Trop tôt
     run_in(timedelta(seconds=60), fexample, "not yet")
     assert "not yet" not in triggered
 
-    # Moment déclenché
-    clock.advance(61)
-    run_in(timedelta(seconds=60), fexample, "now OK")
+    # Avancer le temps
+    with freeze_time("2025-01-01 12:01:01"):
+        run_in(timedelta(seconds=60), fexample, "now OK")
     assert "now OK" in triggered
 
     # Trop tard
-    clock.advance(-100)
-    run_in(timedelta(seconds=-1), fexample, "too late")
+    with freeze_time("2025-01-01 11:59:00"):
+        run_in(timedelta(seconds=-1), fexample, "too late")
     assert "too late" not in triggered
 
 
-def test_run_later(clock):
+@freeze_time("2025-01-01 14:00:00")
+def test_run_later():
     triggered = []
     def fexample(label): triggered.append(label)
 
-    clock._now = datetime(2025, 1, 1, 14, 0, 0)
-
     # Trop tôt (float seconds)
     run_later(45, fexample, "not yet")
     assert "not yet" not in triggered
 
-    # Moment déclenché
-    clock.advance(60)
-    run_later(45, fexample, "now OK")
+    # Avancer le temps
+    with freeze_time("2025-01-01 14:01:00"):
+        run_later(45, fexample, "now OK")
     assert "now OK" in triggered
 
     # Trop tard
@@ -103,10 +74,10 @@ def test_run_later(clock):
     assert "too late" not in triggered
 
     # Format datetime
-    clock._now = datetime(2025, 1, 1, 15, 0, 0)
-    run_later(today(15, 5), fexample, "not yet dt")
+    with freeze_time("2025-01-01 15:00:00"):
+        run_later(today(15, 5), fexample, "not yet dt")
     assert "not yet dt" not in triggered
 
-    clock.advance(6 * 60)
-    run_later(today(15, 5), fexample, "now OK dt")
+    with freeze_time("2025-01-01 15:06:00"):
+        run_later(today(15, 5), fexample, "now OK dt")
     assert "now OK dt" in triggered