diff --git a/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_importer.py b/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_importer.py
index 23fc8e5d..694f93ac 100644
--- a/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_importer.py
+++ b/ecs/jskult-batch-daily/src/batch/vjsk/vjsk_importer.py
@@ -150,6 +150,11 @@ def _check_received_files() -> list:
     if not _check_if_file_exists(received_s3_files, vjsk_mapper.CONDKEY_LOT_NUM_MST):
         raise BatchOperationException(f'製造ロット番号マスタファイルがありません ファイル一覧:{received_s3_files}')
 
+    # 想定外ファイルの受領確認 (想定ファイル数、卸在庫データ取込対象日の場合は15、そうでない場合は14)
+    naturally_count = 15 if batch_context.is_vjsk_stock_import_day else 14
+    if len(received_s3_files) > naturally_count:
+        raise BatchOperationException(f'想定数を超える受領ファイルがあります ファイル一覧:{received_s3_files}')
+
     logger.debug('_check_received_files done')
 
     return received_s3_files
diff --git a/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py b/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py
index 43afd62c..8dac0688 100644
--- a/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py
+++ b/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/test_vjsk_load.py
@@ -2,6 +2,7 @@ from os import path
 
 import pytest
 
+from src.aws.s3 import VjskReceiveBucket
 from src.batch.common.batch_context import BatchContext
 # from src.batch.vjsk.vjsk_data_load_manager import VjskDataLoadManager
 from src.batch.vjsk.vjsk_importer import (_check_received_files,
@@ -40,9 +41,16 @@ class TestImportFileToDb:
         期待値
             例外が発生しない
         """
-        # setup
+        # setup - 卸在庫データ取込対象日
         self.batch_context.is_vjsk_stock_import_day = True
 
+        # setup - S3受領バケットの内容をすべて削除する
+        vjsk_recv_bucket = VjskReceiveBucket()
+        s3_files = vjsk_recv_bucket.get_s3_file_list()
+        for file_obj in s3_files:
+            s3_client.delete_object(Bucket=bucket_name, Key=file_obj.get("filename"))
+
+        # setup - テスト用受領ファイルをS3受領バケットにupload
         test_files = [
             "stock_slip_data_202304270000.gz",
             "slip_data_202304270000.gz",
@@ -58,8 +66,7 @@ class TestImportFileToDb:
             "whs_customer_mst_202304270000.gz",
             "mdb_conv_mst_202304270000.gz",
             "bio_slip_data_202304270000.gz",
-            "lot_num_mst_202304270000.gz",
-            "dummy.gz"
+            "lot_num_mst_202304270000.gz"
         ]
         for test_file in test_files:
             file_name = path.join(self.test_file_path, test_file)
diff --git a/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/testdata/dummy.gz b/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/testdata/dummy.gz
deleted file mode 100644
index fb34f937..00000000
Binary files a/ecs/jskult-batch-daily/tests/batch/vjsk/vjsk_load/testdata/dummy.gz and /dev/null differ