diff --git a/tests/unittests/general/prefix_ip_collector_test.py b/tests/unittests/general/prefix_ip_collector_test.py
index f90b84dbf4..a6655113b0 100644
--- a/tests/unittests/general/prefix_ip_collector_test.py
+++ b/tests/unittests/general/prefix_ip_collector_test.py
@@ -3,7 +3,7 @@
 """Tests for prefix_ip_collector"""
 
 import unittest
-from datetime import datetime
+from datetime import datetime, timezone
 from nav.activeipcollector.manager import find_range, get_timestamp
 
 
@@ -14,5 +14,5 @@ def test_find_range(self):
         self.assertEqual(find_range('2001:700:0:251e::/64'), 0)
 
     def test_find_timestamp(self):
-        ts = datetime(2012, 10, 4, 14, 30)
-        self.assertEqual(get_timestamp(ts), 1349353800)
+        ts = datetime(2012, 10, 4, 14, 30, tzinfo=timezone.utc)
+        self.assertEqual(get_timestamp(ts), 1349361000)