diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index 53d9e78..5a0813e 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -279,6 +279,15 @@ jobs:
             exit 1
           fi
 
+          NGINX_TEST_LOG=\$(mktemp)
+          if ! sudo nginx -t >"\$NGINX_TEST_LOG" 2>&1; then
+            echo "❌ Nginx configuration is invalid" >&2
+            tail -50 "\$NGINX_TEST_LOG" >&2 || true
+            rm -f "\$NGINX_TEST_LOG"
+            exit 1
+          fi
+          rm -f "\$NGINX_TEST_LOG"
+
           echo "✓ Nginx 설정 검증 통과 (실제 로드 파일 확인 + 포트 5001 고정 + trailing slash 없음)"
 
           echo "--- [5/5] 헬스 체크 (최대 60초) ---"
diff --git a/deploy_gb.sh b/deploy_gb.sh
index 98f0581..91ee554 100644
--- a/deploy_gb.sh
+++ b/deploy_gb.sh
@@ -175,12 +175,16 @@ echo "  ✓ No critical errors in logs"
 
 # 6.2 Nginx 설정 검증
 echo "  Checking Nginx configuration..."
-if ! sudo nginx -t 2>&1 | grep -q "successful"; then
+NGINX_TEST_LOG=$(mktemp)
+if ! sudo nginx -t >"$NGINX_TEST_LOG" 2>&1; then
   echo "❌ Nginx configuration is invalid"
+  tail -50 "$NGINX_TEST_LOG" 2>/dev/null || true
+  rm -f "$NGINX_TEST_LOG"
   echo "🔙 Rolling back..."
   kill -9 $NEW_PID || true
   exit 1
 fi
+rm -f "$NGINX_TEST_LOG"
 echo "  ✓ Nginx configuration is valid"
 
 # 6.3 프로세스가 여전히 실행 중인지 확인