diff --git a/tests/serialization/scene-document-json.test.ts b/tests/serialization/scene-document-json.test.ts
index 85e3a065..aa09b95d 100644
--- a/tests/serialization/scene-document-json.test.ts
+++ b/tests/serialization/scene-document-json.test.ts
@@ -1658,6 +1658,51 @@ describe("scene document JSON", () => {
     expect(Object.keys(migratedDocument.materials)).toEqual(STARTER_MATERIAL_LIBRARY.map((material) => material.id));
   });
 
+  it("migrates NPC foundation entities to include default collider settings", () => {
+    const migratedDocument = migrateSceneDocument({
+      version: NPC_ENTITY_FOUNDATION_SCENE_DOCUMENT_VERSION,
+      name: "NPC Collider Migration",
+      world: createEmptySceneDocument().world,
+      materials: createEmptySceneDocument().materials,
+      textures: {},
+      assets: {},
+      brushes: {},
+      modelInstances: {},
+      entities: {
+        "entity-npc-guide": {
+          id: "entity-npc-guide",
+          kind: "npc",
+          position: {
+            x: 1,
+            y: 0,
+            z: 2
+          },
+          visible: true,
+          enabled: true,
+          actorId: "actor-town-guide",
+          yawDegrees: 30,
+          modelAssetId: null
+        }
+      },
+      interactionLinks: {}
+    });
+
+    expect(migratedDocument.version).toBe(SCENE_DOCUMENT_VERSION);
+    expect(migratedDocument.entities["entity-npc-guide"]).toEqual(
+      createNpcEntity({
+        id: "entity-npc-guide",
+        actorId: "actor-town-guide",
+        position: {
+          x: 1,
+          y: 0,
+          z: 2
+        },
+        yawDegrees: 30,
+        modelAssetId: null
+      })
+    );
+  });
+
   it("migrates slice 3.0 documents to the current schema version without changing empty asset collections", () => {
     const migratedDocument = migrateSceneDocument({
       version: MODEL_ASSET_PIPELINE_SCENE_DOCUMENT_VERSION,