diff --git a/tests/domain/delete-project-asset.test.ts b/tests/domain/delete-project-asset.test.ts
new file mode 100644
index 00000000..9898c0f5
--- /dev/null
+++ b/tests/domain/delete-project-asset.test.ts
@@ -0,0 +1,210 @@
+import { describe, expect, it } from "vitest";
+import { BoxGeometry } from "three";
+
+import { deleteProjectAssetFromProjectDocument } from "../../src/assets/delete-project-asset";
+import { createModelInstance } from "../../src/assets/model-instances";
+import {
+  createProjectAssetStorageKey,
+  type AudioAssetRecord,
+  type ImageAssetRecord
+} from "../../src/assets/project-assets";
+import { createEmptyProjectDocument } from "../../src/document/scene-document";
+import { createDefaultWorldSettings } from "../../src/document/world-settings";
+import {
+  createSoundEmitterEntity,
+  createTeleportTargetEntity,
+  createTriggerVolumeEntity
+} from "../../src/entities/entity-instances";
+import {
+  createPlayAnimationInteractionLink,
+  createPlaySoundInteractionLink,
+  createStopAnimationInteractionLink,
+  createStopSoundInteractionLink,
+  createTeleportPlayerInteractionLink
+} from "../../src/interactions/interaction-links";
+import { createFixtureLoadedModelAssetFromGeometry } from "../helpers/model-collider-fixtures";
+
+function createProjectDocumentFixture() {
+  const baseProjectDocument = createEmptyProjectDocument({
+    sceneName: "Asset Cleanup Scene"
+  });
+  const sceneId = baseProjectDocument.activeSceneId;
+  const baseScene = baseProjectDocument.scenes[sceneId];
+  const { asset: modelAsset } = createFixtureLoadedModelAssetFromGeometry(
+    "asset-model-cleanup",
+    new BoxGeometry(1, 2, 1)
+  );
+  const imageAsset: ImageAssetRecord = {
+    id: "asset-image-cleanup",
+    kind: "image",
+    sourceName: "panorama-cleanup.png",
+    mimeType: "image/png",
+    storageKey: createProjectAssetStorageKey("asset-image-cleanup"),
+    byteLength: 2048,
+    metadata: {
+      kind: "image",
+      width: 1024,
+      height: 512,
+      hasAlpha: false,
+      warnings: []
+    }
+  };
+  const audioAsset: AudioAssetRecord = {
+    id: "asset-audio-cleanup",
+    kind: "audio",
+    sourceName: "cleanup-loop.ogg",
+    mimeType: "audio/ogg",
+    storageKey: createProjectAssetStorageKey("asset-audio-cleanup"),
+    byteLength: 4096,
+    metadata: {
+      kind: "audio",
+      durationSeconds: 6.5,
+      channelCount: 2,
+      sampleRateHz: 44100,
+      warnings: []
+    }
+  };
+  const modelInstance = createModelInstance({
+    id: "model-instance-cleanup",
+    assetId: modelAsset.id
+  });
+  const triggerVolume = createTriggerVolumeEntity({
+    id: "entity-trigger-cleanup"
+  });
+  const teleportTarget = createTeleportTargetEntity({
+    id: "entity-teleport-cleanup"
+  });
+  const soundEmitter = createSoundEmitterEntity({
+    id: "entity-sound-cleanup",
+    audioAssetId: audioAsset.id,
+    autoplay: true,
+    loop: true
+  });
+  const projectDocument = {
+    ...baseProjectDocument,
+    assets: {
+      ...baseProjectDocument.assets,
+      [modelAsset.id]: modelAsset,
+      [imageAsset.id]: imageAsset,
+      [audioAsset.id]: audioAsset
+    },
+    scenes: {
+      ...baseProjectDocument.scenes,
+      [sceneId]: {
+        ...baseScene,
+        world: {
+          ...baseScene.world,
+          background: {
+            mode: "image",
+            assetId: imageAsset.id,
+            environmentIntensity: 0.8
+          }
+        },
+        modelInstances: {
+          [modelInstance.id]: modelInstance
+        },
+        entities: {
+          [triggerVolume.id]: triggerVolume,
+          [teleportTarget.id]: teleportTarget,
+          [soundEmitter.id]: soundEmitter
+        },
+        interactionLinks: {
+          "link-play-animation": createPlayAnimationInteractionLink({
+            id: "link-play-animation",
+            sourceEntityId: triggerVolume.id,
+            targetModelInstanceId: modelInstance.id,
+            clipName: "Idle"
+          }),
+          "link-stop-animation": createStopAnimationInteractionLink({
+            id: "link-stop-animation",
+            sourceEntityId: triggerVolume.id,
+            targetModelInstanceId: modelInstance.id
+          }),
+          "link-play-sound": createPlaySoundInteractionLink({
+            id: "link-play-sound",
+            sourceEntityId: triggerVolume.id,
+            targetSoundEmitterId: soundEmitter.id
+          }),
+          "link-stop-sound": createStopSoundInteractionLink({
+            id: "link-stop-sound",
+            sourceEntityId: triggerVolume.id,
+            targetSoundEmitterId: soundEmitter.id
+          }),
+          "link-teleport": createTeleportPlayerInteractionLink({
+            id: "link-teleport",
+            sourceEntityId: triggerVolume.id,
+            targetEntityId: teleportTarget.id
+          })
+        }
+      }
+    }
+  };
+
+  return {
+    sceneId,
+    projectDocument,
+    modelAsset,
+    imageAsset,
+    audioAsset,
+    modelInstance,
+    soundEmitter
+  };
+}
+
+describe("deleteProjectAssetFromProjectDocument", () => {
+  it("removes deleted model assets from model instances and animation links", () => {
+    const fixture = createProjectDocumentFixture();
+
+    const nextProjectDocument = deleteProjectAssetFromProjectDocument(
+      fixture.projectDocument,
+      fixture.modelAsset.id
+    );
+    const nextScene = nextProjectDocument.scenes[fixture.sceneId];
+
+    expect(nextProjectDocument.assets[fixture.modelAsset.id]).toBeUndefined();
+    expect(nextScene.modelInstances).toEqual({});
+    expect(Object.keys(nextScene.interactionLinks).sort()).toEqual([
+      "link-play-sound",
+      "link-stop-sound",
+      "link-teleport"
+    ]);
+  });
+
+  it("resets image backgrounds when deleting a referenced image asset", () => {
+    const fixture = createProjectDocumentFixture();
+
+    const nextProjectDocument = deleteProjectAssetFromProjectDocument(
+      fixture.projectDocument,
+      fixture.imageAsset.id
+    );
+    const nextScene = nextProjectDocument.scenes[fixture.sceneId];
+
+    expect(nextProjectDocument.assets[fixture.imageAsset.id]).toBeUndefined();
+    expect(nextScene.world.background).toEqual(
+      createDefaultWorldSettings().background
+    );
+  });
+
+  it("silences sound emitters and removes sound links when deleting an audio asset", () => {
+    const fixture = createProjectDocumentFixture();
+
+    const nextProjectDocument = deleteProjectAssetFromProjectDocument(
+      fixture.projectDocument,
+      fixture.audioAsset.id
+    );
+    const nextScene = nextProjectDocument.scenes[fixture.sceneId];
+
+    expect(nextProjectDocument.assets[fixture.audioAsset.id]).toBeUndefined();
+    expect(nextScene.entities[fixture.soundEmitter.id]).toMatchObject({
+      kind: "soundEmitter",
+      audioAssetId: null,
+      autoplay: false,
+      loop: true
+    });
+    expect(Object.keys(nextScene.interactionLinks).sort()).toEqual([
+      "link-play-animation",
+      "link-stop-animation",
+      "link-teleport"
+    ]);
+  });
+});
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