Fix integration trapezoidal test (#93494)

tests/components/integration/test_sensor.py

@@ -217,10 +217,11 @@ async def test_trapezoidal(hass: HomeAssistant) -> None:
     hass.states.async_set(entity_id, 0, {})
     await hass.async_block_till_done()
 
-    # Testing a power sensor with non-monotonic intervals and values
+    start_time = dt_util.utcnow()
-    for time, value in [(20, 10), (30, 30), (40, 5), (50, 0)]:
+    with freeze_time(start_time) as freezer:
-        now = dt_util.utcnow() + timedelta(minutes=time)
+        # Testing a power sensor with non-monotonic intervals and values
-        with freeze_time(now):
+        for time, value in [(20, 10), (30, 30), (40, 5), (50, 0)]:
+            freezer.move_to(start_time + timedelta(minutes=time))
             hass.states.async_set(
                 entity_id,
                 value,