diff --git a/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasFixedTreeAddressingTests.cs b/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasFixedTreeAddressingTests.cs
index f8f4a99a..53ea51da 100644
--- a/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasFixedTreeAddressingTests.cs
+++ b/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.FOCAS.Tests/FocasFixedTreeAddressingTests.cs
@@ -40,7 +40,7 @@ public sealed class FocasFixedTreeAddressingTests
         while (DateTime.UtcNow < deadline)
         {
             if (predicate()) return true;
-            await Task.Delay(25);
+            await Task.Delay(25, TestContext.Current.CancellationToken);
         }
         return predicate();
     }
@@ -150,7 +150,7 @@ public sealed class FocasFixedTreeAddressingTests
             new FocasTagDefinition("raw/Run", Host, "R100", FocasDataType.Byte));
 
         await drv.InitializeAsync("{}", CancellationToken.None);
-        await Task.Delay(300);
+        await Task.Delay(300, TestContext.Current.CancellationToken);
 
         drv.GetDeviceState(Host)!.FixedTreeCache.ShouldBeNull();
         await drv.ShutdownAsync(CancellationToken.None);