diff --git a/tests/test_time.py b/tests/test_time.py
index e84c2a0..d8268c7 100644
--- a/tests/test_time.py
+++ b/tests/test_time.py
@@ -95,7 +95,8 @@ def test_naturaldelta_nomonths(test_input: dt.timedelta, expected: str) -> None:
         (1, "a second"),
         (23.5, "23 seconds"),
         (30, "30 seconds"),
-        (dt.datetime.now() - dt.datetime.now(), "a moment"),
+        (dt.timedelta(microseconds=13), "a moment"),
+        (dt.timedelta(microseconds=-13), "a moment"),
         (dt.timedelta(minutes=1, seconds=30), "a minute"),
         (dt.timedelta(minutes=2), "2 minutes"),
         (dt.timedelta(hours=1, minutes=30, seconds=30), "an hour"),