diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DeploymentArtifactAliasParityTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DeploymentArtifactAliasParityTests.cs
index 76f431e1..fbeba6f1 100644
--- a/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DeploymentArtifactAliasParityTests.cs
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DeploymentArtifactAliasParityTests.cs
@@ -73,6 +73,7 @@ public sealed class DeploymentArtifactAliasParityTests
     [Theory]
     [InlineData(1, true)]    // numeric ReadWrite
     [InlineData(0, false)]   // numeric Read
+    [InlineData(2, false)]   // future/unknown AccessLevel maps fail-safe to read-only (only ReadWrite==1 ⇒ writable)
     public void ParseComposition_maps_numeric_AccessLevel_to_Writable(int accessLevel, bool expectedWritable)
     {
         var blob = JsonSerializer.SerializeToUtf8Bytes(new