diff --git a/tests/test_utils_run_later.py b/tests/test_utils_run_later.py
index e2ecaa275..589d75c21 100644
--- a/tests/test_utils_run_later.py
+++ b/tests/test_utils_run_later.py
@@ -21,6 +21,16 @@ class FakeDatetime:
         return getattr(datetime, attr)
 
 
+# Wrapper to monkeypatch the whole datetime module with a fake .now()
+class FakeDateTimeModule:
+    def __init__(self, fake_dt):
+        self.fake_dt = fake_dt
+    def now(self):
+        return self.fake_dt.now()
+    def __getattr__(self, attr):
+        return getattr(datetime, attr)
+
+
 def test_run_at(monkeypatch):
     triggered = []
 
@@ -30,9 +40,7 @@ def test_run_at(monkeypatch):
     base = datetime(2025, 1, 1, 12, 0, 0)
     fake_dt = FakeDatetime(base)
 
-    # Patch dependencies in slic.utils.run_later
-    monkeypatch.setattr("slic.utils.run_later.datetime", datetime)
-    monkeypatch.setattr("slic.utils.run_later.datetime.now", fake_dt.now)
+    monkeypatch.setattr("slic.utils.run_later.datetime", FakeDateTimeModule(fake_dt))
     monkeypatch.setattr("slic.utils.run_later.sleep", lambda x: None)
     monkeypatch.setattr("slic.utils.run_later.tqdm_mod", lambda *a, **k: DummyBar())
 
@@ -56,8 +64,7 @@ def test_run_in(monkeypatch):
     base = datetime(2025, 1, 1, 13, 0, 0)
     fake_dt = FakeDatetime(base)
 
-    monkeypatch.setattr("slic.utils.run_later.datetime", datetime)
-    monkeypatch.setattr("slic.utils.run_later.datetime.now", fake_dt.now)
+    monkeypatch.setattr("slic.utils.run_later.datetime", FakeDateTimeModule(fake_dt))
     monkeypatch.setattr("slic.utils.run_later.sleep", lambda x: None)
     monkeypatch.setattr("slic.utils.run_later.tqdm_mod", lambda *a, **k: DummyBar())
 
@@ -82,8 +89,7 @@ def test_run_later(monkeypatch):
     base = datetime(2025, 1, 1, 14, 0, 0)
     fake_dt = FakeDatetime(base)
 
-    monkeypatch.setattr("slic.utils.run_later.datetime", datetime)
-    monkeypatch.setattr("slic.utils.run_later.datetime.now", fake_dt.now)
+    monkeypatch.setattr("slic.utils.run_later.datetime", FakeDateTimeModule(fake_dt))
     monkeypatch.setattr("slic.utils.run_later.sleep", lambda x: None)
     monkeypatch.setattr("slic.utils.run_later.tqdm_mod", lambda *a, **k: DummyBar())