diff --git a/yandextank/stepper/config.py b/yandextank/stepper/config.py
index 8849640b..bcb9b6f0 100644
--- a/yandextank/stepper/config.py
+++ b/yandextank/stepper/config.py
@@ -133,7 +133,7 @@ def get_marker(self):
         return self.marker
 
     def get_filter(self):
-        if len(self.chosen_cases):
+        if self.chosen_cases:
 
             def is_chosen_case(ammo_tuple):
                 return ammo_tuple[1] in self.chosen_cases