diff --git a/tests/test_registry.py b/tests/test_registry.py
index 57f3e1d..0dd7772 100644
--- a/tests/test_registry.py
+++ b/tests/test_registry.py
@@ -66,10 +66,10 @@ class TestRegistry(RQTestCase):
         job = queue.enqueue(say_hello)
 
         registry.add(job, 5)
-        self.assertEqual(
-            registry.get_expiration_time(job),
-            (datetime.utcnow() + timedelta(seconds=5)).replace(microsecond=0)
-        )
+        time = registry.get_expiration_time(job)
+        expected_time = (datetime.utcnow() + timedelta(seconds=5)).replace(microsecond=0)
+        self.assertGreaterEqual(time, expected_time - timedelta(seconds=2))
+        self.assertLessEqual(time, expected_time + timedelta(seconds=2))
 
     def test_add_and_remove(self):
         """Adding and removing job to StartedJobRegistry."""
diff --git a/tests/test_retry.py b/tests/test_retry.py
index ad01b37..e8fddeb 100644
--- a/tests/test_retry.py
+++ b/tests/test_retry.py
@@ -114,7 +114,7 @@ class TestRetry(RQTestCase):
         # Scheduled time is roughly 5 seconds from now
         scheduled_time = registry.get_scheduled_time(job)
         now = datetime.now(timezone.utc)
-        self.assertTrue(now + timedelta(seconds=4) < scheduled_time < now + timedelta(seconds=6))
+        self.assertTrue(now + timedelta(seconds=4) < scheduled_time < now + timedelta(seconds=10))
 
     def test_cleanup_handles_retries(self):
         """Expired jobs should also be retried"""