diff --git a/homeassistant/helpers/event.py b/homeassistant/helpers/event.py
index d418f9e62b1..dd386edfa3d 100644
--- a/homeassistant/helpers/event.py
+++ b/homeassistant/helpers/event.py
@@ -564,6 +564,9 @@ def async_track_sunset(
 
 track_sunset = threaded_listener_factory(async_track_sunset)
 
+# For targeted patching in tests
+pattern_utc_now = dt_util.utcnow
+
 
 @callback
 @bind_hass
@@ -613,7 +616,7 @@ def async_track_utc_time_change(
         """Listen for matching time_changed events."""
         nonlocal next_time, last_now, cancel_callback
 
-        now = dt_util.utcnow()
+        now = pattern_utc_now()
 
         if now < last_now:
             # Time rolled back
diff --git a/tests/common.py b/tests/common.py
index 82d72c11a04..b4bf130d114 100644
--- a/tests/common.py
+++ b/tests/common.py
@@ -300,7 +300,8 @@ def async_fire_time_changed(hass, datetime_):
 
         if mock_seconds_into_future >= future_seconds:
             with patch(
-                "homeassistant.util.dt.utcnow", return_value=date_util.as_utc(datetime_)
+                "homeassistant.helpers.event.pattern_utc_now",
+                return_value=date_util.as_utc(datetime_),
             ):
                 task._run()
                 task.cancel()