diff --git a/apps/backend/package.json b/apps/backend/package.json
index ab6a7e41..a06e0e27 100644
--- a/apps/backend/package.json
+++ b/apps/backend/package.json
@@ -12,7 +12,7 @@
     "build": "tsc -p tsconfig.build.json && rm -rf dist/db/migrations && mkdir -p dist/db && cp -R src/db/migrations dist/db/migrations",
     "db:migrate": "tsx src/db/migrate.ts",
     "dev": "tsx watch --clear-screen=false --include config src/index.ts",
-    "test": "node --import tsx --test $(find src -name '*.test.js' -print)",
+    "test": "node --import tsx --test $(find src \\( -name '*.test.ts' -o -name '*.test.js' \\) -print)",
     "typecheck": "tsc -p tsconfig.json --noEmit",
     "start": "node dist/index.js",
     "start:src": "tsx src/index.ts"
diff --git a/apps/backend/src/repositories/order-item-repo.test.js b/apps/backend/src/repositories/order-item-repo.test.ts
similarity index 100%
rename from apps/backend/src/repositories/order-item-repo.test.js
rename to apps/backend/src/repositories/order-item-repo.test.ts
diff --git a/apps/backend/src/services/admin/admin-read-shared-helpers.test.js b/apps/backend/src/services/admin/admin-read-shared-helpers.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/admin-read-shared-helpers.test.js
rename to apps/backend/src/services/admin/admin-read-shared-helpers.test.ts
diff --git a/apps/backend/src/services/admin/admin-webhook-read-helpers.test.js b/apps/backend/src/services/admin/admin-webhook-read-helpers.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/admin-webhook-read-helpers.test.js
rename to apps/backend/src/services/admin/admin-webhook-read-helpers.test.ts
diff --git a/apps/backend/src/services/admin/admin-write-service.test.js b/apps/backend/src/services/admin/admin-write-service.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/admin-write-service.test.js
rename to apps/backend/src/services/admin/admin-write-service.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/cloudtentacles.test.js b/apps/backend/src/services/admin/platform-config/cloudtentacles.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/cloudtentacles.test.js
rename to apps/backend/src/services/admin/platform-config/cloudtentacles.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/context.test.js b/apps/backend/src/services/admin/platform-config/context.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/context.test.js
rename to apps/backend/src/services/admin/platform-config/context.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/domain.test.js b/apps/backend/src/services/admin/platform-config/domain.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/domain.test.js
rename to apps/backend/src/services/admin/platform-config/domain.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/fulfillment.test.js b/apps/backend/src/services/admin/platform-config/fulfillment.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/fulfillment.test.js
rename to apps/backend/src/services/admin/platform-config/fulfillment.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/mappers.test.js b/apps/backend/src/services/admin/platform-config/mappers.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/mappers.test.js
rename to apps/backend/src/services/admin/platform-config/mappers.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/observed-products.test.js b/apps/backend/src/services/admin/platform-config/observed-products.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/observed-products.test.js
rename to apps/backend/src/services/admin/platform-config/observed-products.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/validation.test.js b/apps/backend/src/services/admin/platform-config/validation.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/validation.test.js
rename to apps/backend/src/services/admin/platform-config/validation.test.ts
diff --git a/apps/backend/src/services/admin/platform-config/writes.test.js b/apps/backend/src/services/admin/platform-config/writes.test.ts
similarity index 100%
rename from apps/backend/src/services/admin/platform-config/writes.test.js
rename to apps/backend/src/services/admin/platform-config/writes.test.ts
diff --git a/apps/backend/src/services/bootstrap/fulfillment-bootstrap-service.test.js b/apps/backend/src/services/bootstrap/fulfillment-bootstrap-service.test.ts
similarity index 100%
rename from apps/backend/src/services/bootstrap/fulfillment-bootstrap-service.test.js
rename to apps/backend/src/services/bootstrap/fulfillment-bootstrap-service.test.ts
diff --git a/apps/backend/src/services/claim/claim-session-service.test.js b/apps/backend/src/services/claim/claim-session-service.test.ts
similarity index 100%
rename from apps/backend/src/services/claim/claim-session-service.test.js
rename to apps/backend/src/services/claim/claim-session-service.test.ts
diff --git a/apps/backend/src/services/open-91/shared.test.js b/apps/backend/src/services/open-91/shared.test.ts
similarity index 100%
rename from apps/backend/src/services/open-91/shared.test.js
rename to apps/backend/src/services/open-91/shared.test.ts
diff --git a/apps/backend/src/services/order/agiso-trade-parsing.test.js b/apps/backend/src/services/order/agiso-trade-parsing.test.ts
similarity index 100%
rename from apps/backend/src/services/order/agiso-trade-parsing.test.js
rename to apps/backend/src/services/order/agiso-trade-parsing.test.ts
diff --git a/apps/backend/src/services/order/delivery-task-service.test.js b/apps/backend/src/services/order/delivery-task-service.test.ts
similarity index 100%
rename from apps/backend/src/services/order/delivery-task-service.test.js
rename to apps/backend/src/services/order/delivery-task-service.test.ts
diff --git a/apps/backend/src/services/order/fulfillment-binding-config-service.test.js b/apps/backend/src/services/order/fulfillment-binding-config-service.test.ts
similarity index 100%
rename from apps/backend/src/services/order/fulfillment-binding-config-service.test.js
rename to apps/backend/src/services/order/fulfillment-binding-config-service.test.ts
diff --git a/apps/backend/src/services/order/inventory-service.test.js b/apps/backend/src/services/order/inventory-service.test.ts
similarity index 100%
rename from apps/backend/src/services/order/inventory-service.test.js
rename to apps/backend/src/services/order/inventory-service.test.ts
diff --git a/apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.test.js b/apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.test.ts
similarity index 100%
rename from apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.test.js
rename to apps/backend/src/services/order/kuaishou-cloud-fulfillment-config-service.test.ts
diff --git a/apps/backend/src/services/order/order-service.test.js b/apps/backend/src/services/order/order-service.test.ts
similarity index 100%
rename from apps/backend/src/services/order/order-service.test.js
rename to apps/backend/src/services/order/order-service.test.ts
diff --git a/apps/backend/src/services/order/product-match-service.test.js b/apps/backend/src/services/order/product-match-service.test.ts
similarity index 100%
rename from apps/backend/src/services/order/product-match-service.test.js
rename to apps/backend/src/services/order/product-match-service.test.ts
diff --git a/apps/backend/src/services/order/webhook-service.test.js b/apps/backend/src/services/order/webhook-service.test.ts
similarity index 100%
rename from apps/backend/src/services/order/webhook-service.test.js
rename to apps/backend/src/services/order/webhook-service.test.ts
diff --git a/apps/backend/src/services/platforms/agiso/xianyu/auto-delivery-service.test.js b/apps/backend/src/services/platforms/agiso/xianyu/auto-delivery-service.test.ts
similarity index 100%
rename from apps/backend/src/services/platforms/agiso/xianyu/auto-delivery-service.test.js
rename to apps/backend/src/services/platforms/agiso/xianyu/auto-delivery-service.test.ts
diff --git a/apps/backend/src/services/platforms/agiso/xianyu/message-service.test.js b/apps/backend/src/services/platforms/agiso/xianyu/message-service.test.ts
similarity index 100%
rename from apps/backend/src/services/platforms/agiso/xianyu/message-service.test.js
rename to apps/backend/src/services/platforms/agiso/xianyu/message-service.test.ts
diff --git a/apps/backend/src/services/platforms/agiso/xianyu/order-detail-service.test.js b/apps/backend/src/services/platforms/agiso/xianyu/order-detail-service.test.ts
similarity index 100%
rename from apps/backend/src/services/platforms/agiso/xianyu/order-detail-service.test.js
rename to apps/backend/src/services/platforms/agiso/xianyu/order-detail-service.test.ts
diff --git a/apps/backend/src/services/platforms/kuaishou-eticket/consume-service.test.js b/apps/backend/src/services/platforms/kuaishou-eticket/consume-service.test.ts
similarity index 100%
rename from apps/backend/src/services/platforms/kuaishou-eticket/consume-service.test.js
rename to apps/backend/src/services/platforms/kuaishou-eticket/consume-service.test.ts
diff --git a/apps/backend/src/services/platforms/kuaishou-eticket/info-service.test.js b/apps/backend/src/services/platforms/kuaishou-eticket/info-service.test.ts
similarity index 100%
rename from apps/backend/src/services/platforms/kuaishou-eticket/info-service.test.js
rename to apps/backend/src/services/platforms/kuaishou-eticket/info-service.test.ts
diff --git a/apps/backend/src/services/platforms/ninetyone/order-service.test.js b/apps/backend/src/services/platforms/ninetyone/order-service.test.ts
similarity index 100%
rename from apps/backend/src/services/platforms/ninetyone/order-service.test.js
rename to apps/backend/src/services/platforms/ninetyone/order-service.test.ts
diff --git a/apps/backend/src/services/session/session-proof.test.js b/apps/backend/src/services/session/session-proof.test.ts
similarity index 100%
rename from apps/backend/src/services/session/session-proof.test.js
rename to apps/backend/src/services/session/session-proof.test.ts
diff --git a/apps/backend/src/services/session/session-redeem.test.js b/apps/backend/src/services/session/session-redeem.test.ts
similarity index 100%
rename from apps/backend/src/services/session/session-redeem.test.js
rename to apps/backend/src/services/session/session-redeem.test.ts
diff --git a/apps/backend/src/services/session/session.test.js b/apps/backend/src/services/session/session.test.ts
similarity index 100%
rename from apps/backend/src/services/session/session.test.js
rename to apps/backend/src/services/session/session.test.ts
diff --git a/apps/backend/src/utils/logger.test.js b/apps/backend/src/utils/logger.test.ts
similarity index 100%
rename from apps/backend/src/utils/logger.test.js
rename to apps/backend/src/utils/logger.test.ts
diff --git a/apps/backend/tsconfig.build.json b/apps/backend/tsconfig.build.json
index 00789ae5..b66dbb2b 100644
--- a/apps/backend/tsconfig.build.json
+++ b/apps/backend/tsconfig.build.json
@@ -11,6 +11,7 @@
     "node_modules",
     "data",
     "dist",
-    "src/**/*.test.js"
+    "src/**/*.test.js",
+    "src/**/*.test.ts"
   ]
 }
diff --git a/apps/backend/tsconfig.json b/apps/backend/tsconfig.json
index 6b7bc9ce..e8bfad14 100644
--- a/apps/backend/tsconfig.json
+++ b/apps/backend/tsconfig.json
@@ -19,6 +19,7 @@
     "node_modules",
     "data",
     "src/**/*.test.js",
+    "src/**/*.test.ts",
     "src/services/platforms/agiso/**/*.js"
   ]
 }
diff --git a/docs/backend-typescript-migration-plan.md b/docs/backend-typescript-migration-plan.md
index 0c7e2325..7dd41edb 100644
--- a/docs/backend-typescript-migration-plan.md
+++ b/docs/backend-typescript-migration-plan.md
@@ -886,6 +886,14 @@
     - `npm run build`
     - `npm test` 共 139 个用例通过
 237. 除 `dist`、`node_modules` 和测试文件外，`apps/backend` 目录下非测试 `.js` 文件已全部迁移为 `.ts`
+238. 后端测试文件迁移到 `.test.ts`：
+    - `src/**/*.test.ts` 共 33 个测试文件
+239. `npm test` 改为同时查找 `.test.ts` / `.test.js`，`tsconfig.json` 与 `tsconfig.build.json` 排除 `.test.ts`，避免测试 mock 数据被生产编译约束
+240. Docker 内验证通过：
+    - `npm run typecheck`
+    - `npm run build`
+    - `npm test` 共 139 个用例通过
+241. 除 `dist` 和 `node_modules` 外，`apps/backend` 目录下 `.js` 文件已全部迁移完成
 
 ## 下一步建议