diff --git a/tests/AcDream.Core.Net.Tests/Messages/AppraiseTests.cs b/tests/AcDream.Core.Net.Tests/Messages/AppraiseTests.cs
index 79dcd1d4..9977a71f 100644
--- a/tests/AcDream.Core.Net.Tests/Messages/AppraiseTests.cs
+++ b/tests/AcDream.Core.Net.Tests/Messages/AppraiseTests.cs
@@ -56,15 +56,18 @@ public sealed class AppraiseTests
     [Fact]
     public void ParsePutObjInContainer_RoundTrip()
     {
-        byte[] payload = new byte[12];
-        BinaryPrimitives.WriteUInt32LittleEndian(payload,            0x1001u);
-        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(4),  0x2001u);
-        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(8),  3u);
+        // 4 fields (Task 7 fix: containerType added) — 16 bytes required.
+        byte[] payload = new byte[16];
+        BinaryPrimitives.WriteUInt32LittleEndian(payload,             0x1001u);
+        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(4),   0x2001u);
+        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(8),   3u);
+        BinaryPrimitives.WriteUInt32LittleEndian(payload.AsSpan(12),  1u); // containerType
 
         var parsed = GameEvents.ParsePutObjInContainer(payload);
         Assert.NotNull(parsed);
         Assert.Equal(0x1001u, parsed!.Value.ItemGuid);
         Assert.Equal(0x2001u, parsed.Value.ContainerGuid);
         Assert.Equal(3u,      parsed.Value.Placement);
+        Assert.Equal(1u,      parsed.Value.ContainerType);
     }
 }