diff --git a/apps/api/src/api/v1/github_webhook.py b/apps/api/src/api/v1/github_webhook.py
index 92466df8..d552b977 100644
--- a/apps/api/src/api/v1/github_webhook.py
+++ b/apps/api/src/api/v1/github_webhook.py
@@ -936,8 +936,8 @@ async def send_github_telegram_alert(
 
         message = "\n".join(message_lines)
 
-        # 發送訊息
-        await telegram.send_message(message)
+        # 發送訊息 (使用 send_notification 而非 send_message)
+        await telegram.send_notification(message)
 
         logger.info(
             "github_telegram_sent",
diff --git a/apps/api/tests/conftest.py b/apps/api/tests/conftest.py
new file mode 100644
index 00000000..27cb23c2
--- /dev/null
+++ b/apps/api/tests/conftest.py
@@ -0,0 +1,25 @@
+"""
+Test Configuration
+==================
+pytest conftest.py - 確保測試環境變數在所有模組載入前生效
+
+Phase 13.1: GitHub Webhook 測試需要這些環境變數
+"""
+
+import os
+
+# =============================================================================
+# 關鍵: 在任何 import 之前設定環境變數
+# =============================================================================
+# pytest 會在所有 test_ 模組之前載入 conftest.py
+# 這確保 settings singleton 建立時能讀到正確的測試值
+
+os.environ.setdefault("MOCK_MODE", "true")
+os.environ.setdefault("ENVIRONMENT", "dev")
+os.environ.setdefault("GITHUB_WEBHOOK_SECRET", "test-secret-key-12345")
+os.environ.setdefault("GITHUB_ALLOWED_REPOS", "test-owner/test-repo,wooo-ai/awoooi")
+
+# =============================================================================
+# Pytest Plugins
+# =============================================================================
+pytest_plugins = ["pytest_asyncio"]
diff --git a/apps/api/tests/test_github_webhook.py b/apps/api/tests/test_github_webhook.py
index cb8fbf58..0ade6935 100644
--- a/apps/api/tests/test_github_webhook.py
+++ b/apps/api/tests/test_github_webhook.py
@@ -14,13 +14,6 @@ Phase 13.1: GitHub Webhook 整合測試
 import hashlib
 import hmac
 import json
-import os
-
-# 設定測試環境變數 (在 import main 之前)
-os.environ.setdefault("MOCK_MODE", "true")
-os.environ.setdefault("ENVIRONMENT", "dev")
-os.environ.setdefault("GITHUB_WEBHOOK_SECRET", "test-secret-key-12345")
-os.environ.setdefault("GITHUB_ALLOWED_REPOS", "test-owner/test-repo,wooo-ai/awoooi")
 
 import httpx
 import pytest
@@ -28,6 +21,8 @@ from httpx import ASGITransport
 
 from src.main import app
 
+# 環境變數設定已移至 conftest.py (解決 E402)
+
 
 # =============================================================================
 # Test Fixtures
diff --git a/apps/api/tests/test_smart_router.py b/apps/api/tests/test_smart_router.py
index fcabf37a..908180f1 100644
--- a/apps/api/tests/test_smart_router.py
+++ b/apps/api/tests/test_smart_router.py
@@ -4,18 +4,18 @@ Smart Router Tests - Phase 13.3
 測試意圖分類、複雜度評分、AI 路由
 """
 
-from src.services.intent_classifier import (
-    IntentClassifier,
-    IntentType,
-    get_intent_classifier,
+from src.services.ai_router import (
+    AIRouter,
+    get_ai_router,
 )
 from src.services.complexity_scorer import (
     ComplexityScorer,
     get_complexity_scorer,
 )
-from src.services.ai_router import (
-    AIRouter,
-    get_ai_router,
+from src.services.intent_classifier import (
+    IntentClassifier,
+    IntentType,
+    get_intent_classifier,
 )