diff --git a/tests/AcDream.Core.Tests/Physics/IndoorContactPlaneRetentionTests.cs b/tests/AcDream.Core.Tests/Physics/IndoorContactPlaneRetentionTests.cs
index fc992a2..eeaf753 100644
--- a/tests/AcDream.Core.Tests/Physics/IndoorContactPlaneRetentionTests.cs
+++ b/tests/AcDream.Core.Tests/Physics/IndoorContactPlaneRetentionTests.cs
@@ -98,7 +98,8 @@ public class IndoorContactPlaneRetentionTests
     /// After <c>SetCheckPos(worldPos, cellId)</c>, the global sphere center is
     /// <c>worldPos + (0,0,sphereRadius)</c>. The BSP bounding sphere must be
     /// centered near this sphere center (NOT at worldPos) so that NodeIntersects
-    /// passes during <c>TryFindIndoorWalkablePlane → FindWalkableSphere → FindWalkableInternal</c>.
+    /// passes during <c>BSPQuery.FindCollisions → BSP traversal → NodeIntersects</c>
+    /// (the indoor cell's primary BSP query in <see cref="Transition.FindEnvCollisions"/>).
     /// </summary>
     private static CellPhysics BuildCellWithFloor(float floorZ, float bspCenterZ)
     {