diff --git a/tests/test_core/test_lib/test_timeout.py b/tests/test_core/test_lib/test_timeout.py
index 0b33eea5..c4386eba 100644
--- a/tests/test_core/test_lib/test_timeout.py
+++ b/tests/test_core/test_lib/test_timeout.py
@@ -21,8 +21,8 @@ def assert_remaining(t: Timeout, time: float | None):
             t.remaining()
     else:
         # prevent rounding errors
-        assert abs(t.remaining() - time) < 0.000_000_1
-        assert abs(t.remaining_or_none() - time) < 0.000_000_1
+        assert abs(t.remaining() - time) < 0.000_001
+        assert abs(t.remaining_or_none() - time) < 0.000_001
 
 
 def test_timeout_init():