diff --git a/tests/validation/time_window_dfg.py b/tests/validation/time_window_dfg.py
index b90a9cd..5f7bbe0 100644
--- a/tests/validation/time_window_dfg.py
+++ b/tests/validation/time_window_dfg.py
@@ -10,8 +10,8 @@ Equal simulated duration, same fresh state and warm-up per variant, one observat
 All variants keep observe_raw_exchange=True; the backend is built once with
 observe_window_exchange=True (a closed window adds no launch). Populations (bitwise) and
 per-interval total impulses are compared OUTSIDE timing; the impulse tolerance is a
-conservative engineering tolerance (see INTERVAL_RTOL), the rigorous substep-scaled comparison
-being the capability test in tests/validation/multigrid/test_exchange_window.py.
+conservative engineering tolerance (see INTERVAL_RTOL); the tighter substep-scaled engineering
+tolerance is exercised by the capability test tests/validation/multigrid/test_exchange_window.py.
 Wall time (perf_counter) with explicit stream synchronization is the only timing source.
 """