diff --git a/binding/tests/test.py b/binding/tests/test.py
index bb3ff46d..0d097519 100644
--- a/binding/tests/test.py
+++ b/binding/tests/test.py
@@ -65,6 +65,8 @@ class Spi(CThostFtdcTraderSpi):
         self, pRspInfo: CThostFtdcRspInfoField, nRequestID: int, bIsLast: bool
     ) -> None:
         print("OnRspError!")
+
+
 # pylint: enable=invalid-name
 
 
diff --git a/tools/check/check_linter.py b/tools/check/check_linter.py
index 3f59a3a7..f9642f14 100644
--- a/tools/check/check_linter.py
+++ b/tools/check/check_linter.py
@@ -18,7 +18,9 @@ def check_flake8():
 def check_pylint():
     passed = True
     try:
-        subprocess.check_call(["pylint", "-j", "0", "vnpy", "binding", "tests"])
+        subprocess.check_call(
+            ["pylint", "-j", "0", "vnpy", "binding", "tests"]
+        )
     except subprocess.SubprocessError:
         passed = False
     return passed