diff --git a/miio/tests/test_chuangmi_ir.py b/miio/tests/test_chuangmi_ir.py
index 203481ead..ab3df7b56 100644
--- a/miio/tests/test_chuangmi_ir.py
+++ b/miio/tests/test_chuangmi_ir.py
@@ -17,6 +17,7 @@
                            '001600160016004100160041001600410016004100160623' \
                            '015B005700160E6E'
 
+
 class DummyChuangmiIr(DummyDevice, ChuangmiIr):
     def __init__(self, *args, **kwargs):
         self.state = {}