diff --git a/src/entities/shared/entityTypes.test.ts b/src/entities/shared/entityTypes.test.ts
new file mode 100644
index 00000000..9dd0c859
--- /dev/null
+++ b/src/entities/shared/entityTypes.test.ts
@@ -0,0 +1,132 @@
+import { SceneContentRating } from "decentraland-gatsby/dist/utils/api/Catalyst.types"
+
+import { isPlace, isWorld } from "./entityTypes"
+import { AggregatePlaceAttributes } from "../Place/types"
+import { AggregateWorldAttributes, WorldAttributes } from "../World/types"
+
+const baseWorldAttributes: WorldAttributes = {
+  id: "testworld.dcl.eth",
+  world_name: "testworld.dcl.eth",
+  title: "Test World",
+  description: null,
+  image: null,
+  owner: null,
+  content_rating: SceneContentRating.TEEN,
+  categories: [],
+  likes: 0,
+  dislikes: 0,
+  favorites: 0,
+  like_rate: 0.5,
+  like_score: 0,
+  disabled: false,
+  disabled_at: null,
+  created_at: new Date(),
+  updated_at: new Date(),
+  show_in_places: true,
+  single_player: false,
+  skybox_time: null,
+  is_private: false,
+  highlighted: false,
+  highlighted_image: null,
+  ranking: null,
+}
+
+const aggregateWorldAttributes: AggregateWorldAttributes = {
+  ...baseWorldAttributes,
+  user_like: false,
+  user_dislike: false,
+  user_favorite: false,
+  user_visits: 0,
+  world: true,
+  contact_name: null,
+  base_position: "0,0",
+  deployed_at: null,
+}
+
+const aggregatePlaceAttributes: AggregatePlaceAttributes = {
+  id: "place-uuid",
+  world_name: null,
+  title: "Genesis Plaza",
+  description: null,
+  image: null,
+  owner: null,
+  content_rating: SceneContentRating.TEEN,
+  categories: [],
+  likes: 0,
+  dislikes: 0,
+  favorites: 0,
+  like_rate: 0.5,
+  like_score: 0,
+  disabled: false,
+  disabled_at: null,
+  created_at: new Date(),
+  updated_at: new Date(),
+  base_position: "0,0",
+  positions: ["0,0"],
+  contact_name: null,
+  contact_email: null,
+  highlighted: false,
+  highlighted_image: null,
+  world: false,
+  world_id: null,
+  deployed_at: new Date(),
+  creator_address: null,
+  sdk: null,
+  ranking: null,
+  textsearch: null,
+  user_like: false,
+  user_dislike: false,
+  user_favorite: false,
+  user_visits: 0,
+}
+
+describe("isWorld", () => {
+  describe("with a non-aggregate WorldAttributes (e.g. from WorldModel.findByWorldName)", () => {
+    it("returns true", () => {
+      expect(isWorld(baseWorldAttributes)).toBe(true)
+    })
+  })
+
+  describe("with an aggregate AggregateWorldAttributes", () => {
+    it("returns true", () => {
+      expect(isWorld(aggregateWorldAttributes)).toBe(true)
+    })
+  })
+
+  describe("with an aggregate AggregatePlaceAttributes (world: false)", () => {
+    it("returns false", () => {
+      expect(isWorld(aggregatePlaceAttributes)).toBe(false)
+    })
+  })
+
+  describe("with an aggregate AggregatePlaceAttributes that is a world scene (world: true)", () => {
+    it("returns true via the aggregate world flag", () => {
+      const worldScenePlace: AggregatePlaceAttributes = {
+        ...aggregatePlaceAttributes,
+        world: true,
+        world_name: "myworld.dcl.eth",
+      }
+      expect(isWorld(worldScenePlace)).toBe(true)
+    })
+  })
+})
+
+describe("isPlace", () => {
+  describe("with an aggregate AggregatePlaceAttributes", () => {
+    it("returns true", () => {
+      expect(isPlace(aggregatePlaceAttributes)).toBe(true)
+    })
+  })
+
+  describe("with an aggregate AggregateWorldAttributes", () => {
+    it("returns false", () => {
+      expect(isPlace(aggregateWorldAttributes)).toBe(false)
+    })
+  })
+
+  describe("with a non-aggregate WorldAttributes", () => {
+    it("returns false", () => {
+      expect(isPlace(baseWorldAttributes)).toBe(false)
+    })
+  })
+})
diff --git a/src/entities/shared/entityTypes.ts b/src/entities/shared/entityTypes.ts
index c7d03873..f70eaecd 100644
--- a/src/entities/shared/entityTypes.ts
+++ b/src/entities/shared/entityTypes.ts
@@ -34,11 +34,16 @@ export type AnyEntityAttributes =
 /**
  * Type guard to check if an entity is a world.
  * Works for aggregate, non-aggregate, and base entity types.
+ * For aggregate entities, checks the `world` boolean field.
+ * For non-aggregate WorldAttributes (e.g. from WorldModel queries), detects via
+ * `show_in_places`, which is unique to WorldAttributes and absent from PlaceAttributes.
  */
 export function isWorld(
   entity: AnyEntityAttributes | AggregateBaseEntityAttributes
 ): entity is WorldAttributes | AggregateWorldAttributes {
-  return "world" in entity && entity.world === true
+  return (
+    ("world" in entity && entity.world === true) || "show_in_places" in entity
+  )
 }
 
 /**
diff --git a/test/integration/handleWorldSettingsChanged.test.ts b/test/integration/handleWorldSettingsChanged.test.ts
index cb6fe61e..3360718d 100644
--- a/test/integration/handleWorldSettingsChanged.test.ts
+++ b/test/integration/handleWorldSettingsChanged.test.ts
@@ -1,6 +1,7 @@
 import supertest from "supertest"
 
 import { handleWorldSettingsChanged } from "../../src/entities/CheckScenes/task/handleWorldSettingsChanged"
+import * as SlackUtils from "../../src/entities/Slack/utils"
 import {
   createWorldSettingsChangedEvent,
   createWorldSettingsDowngradeRatingEvent,
@@ -157,6 +158,16 @@ describe("handleWorldSettingsChanged integration", () => {
 
         expect(response.body.data.content_rating).toBe("T")
       })
+
+      it("should call notifyDowngradeRating with the world entity (world_name defined, not undefined base_position)", () => {
+        expect(SlackUtils.notifyDowngradeRating).toHaveBeenCalledWith(
+          expect.objectContaining({
+            world_name: "existingworld.dcl.eth",
+            show_in_places: expect.anything(),
+          }),
+          expect.any(String)
+        )
+      })
     })
   })