diff --git a/tests/plugins/docker/test_overview.py b/tests/plugins/docker/test_overview.py
index a36b859..09dd195 100644
--- a/tests/plugins/docker/test_overview.py
+++ b/tests/plugins/docker/test_overview.py
@@ -274,7 +274,8 @@ async def _container_page(app, c, **over):
     ctx = dict(container=c, host=NS(id="h1", name="nas"), host_id="h1", name=c.name, label=c.name,
                node_name=None, exit_failed=True, ports=[], uptime=None,
                usage={"mem_limit": None}, net_rx="1.0 KiB", net_tx="2.0 KiB", blk_read="3.0 MiB",
-               blk_write="4.0 MiB", died_at=NOW - timedelta(minutes=20), current_range="24h",
+               blk_write="4.0 MiB", current_range="24h",
+               died_at=datetime.now(timezone.utc) - timedelta(minutes=20),   # |ago reads the clock
                events=[{"event": "health_change", "detail": "healthy→unhealthy", "at": NOW,
                         "glyph": "◐", "tone": "warn"}])
     ctx.update(over)