diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 168cb02..b095f84 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -14,6 +14,7 @@ jobs:
       matrix:
         python-version: [3.6, 3.7, 3.8, 3.9, '3.10']
 
+    name: Python ${{ matrix.python-version }}
     steps:
     - uses: actions/checkout@v2
 
@@ -22,5 +23,8 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
 
+    - name: Set timezone
+      uses: szenius/set-timezone@v1.0
+
     - name: Run tests
       run: make test
diff --git a/grafanimate/timeutil.py b/grafanimate/timeutil.py
index 05a1e51..9c21e52 100644
--- a/grafanimate/timeutil.py
+++ b/grafanimate/timeutil.py
@@ -183,7 +183,7 @@ def convert_absolute_timestamp(value: Union[datetime, str]) -> datetime:
     if isinstance(value, datetime):
         pass
     elif isinstance(value, int):
-        value = datetime.fromtimestamp(value)
+        value = datetime.fromtimestamp(value, tz=timezone.utc)
     elif isinstance(value, str):
         value = dateutil.parser.parse(value)
     else:
diff --git a/tests/test_model.py b/tests/test_model.py
index 3f82aab..4dbe22c 100644
--- a/tests/test_model.py
+++ b/tests/test_model.py
@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timezone
 
 from dateutil.relativedelta import relativedelta
 from dateutil.rrule import DAILY, MINUTELY, SECONDLY
@@ -74,8 +74,8 @@ def test_sequence_epoch():
         mode=SequencingMode.CUMULATIVE,
     )
 
-    assert seq.start == datetime(2021, 11, 16, 20, 30, 11)
-    assert seq.stop == datetime(2021, 11, 16, 20, 45, 11)
+    assert seq.start == datetime(2021, 11, 16, 19, 30, 11, tzinfo=timezone.utc)
+    assert seq.stop == datetime(2021, 11, 16, 19, 45, 11, tzinfo=timezone.utc)
     assert seq.every == "4m5s"
     assert seq.mode == SequencingMode.CUMULATIVE
 
@@ -85,11 +85,11 @@ def test_sequence_epoch():
     assert seq.recurrence.duration == relativedelta(minutes=+4, seconds=+4)
 
     assert list(seq.get_timeranges_isoformat()) == [
-        "2021-11-16T20:30:11/2021-11-16T20:30:11",
-        "2021-11-16T20:30:11/2021-11-16T20:34:11",
-        "2021-11-16T20:30:11/2021-11-16T20:38:11",
-        "2021-11-16T20:30:11/2021-11-16T20:42:11",
-        "2021-11-16T20:30:11/2021-11-16T20:46:11",
+        "2021-11-16T19:30:11+00:00/2021-11-16T19:30:11+00:00",
+        "2021-11-16T19:30:11+00:00/2021-11-16T19:34:11+00:00",
+        "2021-11-16T19:30:11+00:00/2021-11-16T19:38:11+00:00",
+        "2021-11-16T19:30:11+00:00/2021-11-16T19:42:11+00:00",
+        "2021-11-16T19:30:11+00:00/2021-11-16T19:46:11+00:00",
     ]