diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests/Sdk2LifecycleSoakTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests/Sdk2LifecycleSoakTests.cs
index 492d07b1..7c682063 100644
--- a/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests/Sdk2LifecycleSoakTests.cs
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer.IntegrationTests/Sdk2LifecycleSoakTests.cs
@@ -82,6 +82,8 @@ public sealed class Sdk2LifecycleSoakTests
             rig = await ServerEventRig.StartAsync("SDK2LifecycleSoak", encrypted: true, ct);
             serverRoot = RequiredField<string>(rig, "_pkiRoot");
             Configure(rig);
+            // The required observation period excludes initial certificate creation and server startup.
+            watch.Restart();
             await LogAsync(evidence, new
             {
                 kind = "start", utc = DateTimeOffset.UtcNow, processId = Environment.ProcessId,