diff --git a/tests/ClaudeDo.Worker.Tests/Logging/BroadcastLogSinkTests.cs b/tests/ClaudeDo.Worker.Tests/Logging/BroadcastLogSinkTests.cs
index 28274861..92c40934 100644
--- a/tests/ClaudeDo.Worker.Tests/Logging/BroadcastLogSinkTests.cs
+++ b/tests/ClaudeDo.Worker.Tests/Logging/BroadcastLogSinkTests.cs
@@ -98,7 +98,7 @@ public class BroadcastLogSinkTests
     [Fact]
     public void Does_not_throw_when_detached()
     {
-        var buffer = new LogRingBuffer(TimeSpan.FromHours(1));
+        var buffer = new LogRingBuffer(TimeSpan.FromHours(1), utcNow: () => EvtTime.UtcDateTime);
         var sink = new BroadcastLogSink(buffer);
         sink.Emit(Evt(LogEventLevel.Error, "no subscriber"));