diff --git a/httprunner/cli.py b/httprunner/cli.py
index f2fcdece..a68cedc1 100644
--- a/httprunner/cli.py
+++ b/httprunner/cli.py
@@ -2,13 +2,13 @@ import argparse
 import os
 import sys
 
-from loguru import logger
-
 if len(sys.argv) >= 2 and sys.argv[1] == "locusts":
     # monkey patch ssl at beginning to avoid RecursionError when running locust.
     from gevent import monkey
     monkey.patch_ssl()
 
+from loguru import logger
+
 from httprunner import __description__, __version__
 from httprunner.api import HttpRunner
 from httprunner.ext.har2case import init_har2case_parser, main_har2case
diff --git a/httprunner/ext/har2case/test_core.py b/httprunner/ext/har2case/core_test.py
similarity index 100%
rename from httprunner/ext/har2case/test_core.py
rename to httprunner/ext/har2case/core_test.py
diff --git a/httprunner/ext/har2case/test_utils.py b/httprunner/ext/har2case/utils_test.py
similarity index 100%
rename from httprunner/ext/har2case/test_utils.py
rename to httprunner/ext/har2case/utils_test.py
diff --git a/httprunner/ext/scaffold/test_scaffold.py b/httprunner/ext/scaffold/scaffold_test.py
similarity index 100%
rename from httprunner/ext/scaffold/test_scaffold.py
rename to httprunner/ext/scaffold/scaffold_test.py