diff --git a/src/core/testcase/testcase_manager.py b/src/core/testcase/testcase_manager.py
index 06a74865b1a777682de4ac5718bdad0db20c31a6..96ee4d500cb68943cbea6bddc8c156ff6c1def4b 100644
--- a/src/core/testcase/testcase_manager.py
+++ b/src/core/testcase/testcase_manager.py
@@ -112,7 +112,7 @@ class TestCaseManager(object):
                 if file_name in filter_list_test_file:
                     continue
 
-                _, suffix_name = os.path.splitext(file_name)
+                prefix_name, suffix_name = os.path.splitext(file_name)
                 if suffix_name in FILTER_SUFFIX_NAME_LIST:
                     continue