diff --git a/services/pascal-editor/packages/core/src/store/use-scene-dirty-tracking.test.ts b/services/pascal-editor/packages/core/src/store/use-scene-dirty-tracking.test.ts
index 5a8635c81..e52ae14cc 100644
--- a/services/pascal-editor/packages/core/src/store/use-scene-dirty-tracking.test.ts
+++ b/services/pascal-editor/packages/core/src/store/use-scene-dirty-tracking.test.ts
@@ -74,4 +74,39 @@ describe('dirty tracking', () => {
     expect(useScene.getState().nodes[TRACKED]).toBeUndefined()
     expect(useScene.getState().dirtyNodes.has(TRACKED)).toBe(false)
   })
+
+  test('setScene publishes tracked nodes in the initial dirty snapshot', () => {
+    useScene.getState().setScene(
+      {
+        [UNTRACKED]: makeNode(UNTRACKED, 'test-untracked'),
+        [TRACKED]: makeNode(TRACKED, 'test-tracked'),
+        [UNREGISTERED]: makeNode(UNREGISTERED, 'unregistered-kind'),
+      },
+      [UNTRACKED, TRACKED, UNREGISTERED],
+    )
+
+    const dirtyNodes = useScene.getState().dirtyNodes
+    expect(dirtyNodes.has(UNTRACKED)).toBe(false)
+    expect(dirtyNodes.has(TRACKED)).toBe(true)
+    expect(dirtyNodes.has(UNREGISTERED)).toBe(true)
+  })
+
+  test('loadScene creates a complete site-building-level parent chain', () => {
+    useScene.setState({ nodes: {}, rootNodeIds: [], dirtyNodes: new Set() } as never)
+    useScene.getState().loadScene()
+
+    const state = useScene.getState()
+    const site = state.nodes[state.rootNodeIds[0]!]
+    expect(site?.type).toBe('site')
+    if (site?.type !== 'site') throw new Error('default site was not created')
+
+    const building = state.nodes[site.children[0]! as AnyNodeId]
+    expect(building?.type).toBe('building')
+    expect(building?.parentId).toBe(site.id)
+    if (building?.type !== 'building') throw new Error('default building was not created')
+
+    const level = state.nodes[building.children[0]! as AnyNodeId]
+    expect(level?.type).toBe('level')
+    expect(level?.parentId).toBe(building.id)
+  })
 })