diff --git a/tests/AcDream.Core.Tests/Streaming/StreamingControllerTwoTierTests.cs b/tests/AcDream.Core.Tests/Streaming/StreamingControllerTwoTierTests.cs
index 4774ac2..2b86b6a 100644
--- a/tests/AcDream.Core.Tests/Streaming/StreamingControllerTwoTierTests.cs
+++ b/tests/AcDream.Core.Tests/Streaming/StreamingControllerTwoTierTests.cs
@@ -92,7 +92,9 @@ public class StreamingControllerTwoTierTests
         var state = new GpuWorldState();
 
         // Pre-load a far-tier-style LB record (terrain only, no entities).
-        uint lbId = 0x32320FFFu;
+        // Id must be in canonical form (low 16 bits = 0xFFFF) since
+        // AddEntitiesToExistingLandblock canonicalizes incoming ids.
+        uint lbId = 0x3232FFFFu;
         var lb = new LoadedLandblock(lbId, Heightmap: null!, Entities: System.Array.Empty<WorldEntity>());
         state.AddLandblock(lb);
         Assert.Empty(state.Entities);