diff --git a/freqtrade/tests/test_main.py b/freqtrade/tests/test_main.py
index 7727f5924..aa44081bd 100644
--- a/freqtrade/tests/test_main.py
+++ b/freqtrade/tests/test_main.py
@@ -32,7 +32,7 @@ def test_parse_args_backtesting(mocker):
     assert call_args.loglevel == 20
     assert call_args.subparser == 'backtesting'
     assert call_args.func is not None
-    assert call_args.ticker_interval == None
+    assert call_args.ticker_interval is None
 
 
 def test_main_start_hyperopt(mocker):