diff --git a/photo-service/src/main/java/kr/mafoo/photo/config/WebExceptionHandler.java b/photo-service/src/main/java/kr/mafoo/photo/config/WebExceptionHandler.java
index 3b27e99..1a79d9d 100644
--- a/photo-service/src/main/java/kr/mafoo/photo/config/WebExceptionHandler.java
+++ b/photo-service/src/main/java/kr/mafoo/photo/config/WebExceptionHandler.java
@@ -113,7 +113,7 @@ private Mono<ResponseEntity<String>> handleExceptionInternal(ServerWebExchange e
             if (status == HttpStatus.INTERNAL_SERVER_ERROR) {
                 return slackService.sendErrorNotification(
                         requestMemberId, method, fullPath, requestBody, originIp, userAgent, exception.getMessage()
-                ).then(Mono.just(new ResponseEntity<>("Internal Server Error", status)));
+                ).then(Mono.error(exception));
             }
 
             return Mono.just(new ResponseEntity<>(status.getReasonPhrase(), status));
diff --git a/photo-service/src/main/java/kr/mafoo/photo/controller/SumoneController.java b/photo-service/src/main/java/kr/mafoo/photo/controller/SumoneController.java
index 21db1d6..72d33f0 100644
--- a/photo-service/src/main/java/kr/mafoo/photo/controller/SumoneController.java
+++ b/photo-service/src/main/java/kr/mafoo/photo/controller/SumoneController.java
@@ -162,4 +162,9 @@ Mono<SumoneInviteCodeResponse> getInviteCode(
                 .findById(userId)
                 .map(SumoneInviteCodeResponse::fromEntity);
     }
+
+    @PostMapping("/error")
+    Mono<String> error() {
+        return Mono.error(new RuntimeException("error"));
+    }
 }