diff --git a/xonsh/commands_cache.py b/xonsh/commands_cache.py
index f5b884a71..27460a8e2 100644
--- a/xonsh/commands_cache.py
+++ b/xonsh/commands_cache.py
@@ -168,7 +168,7 @@ class CommandsCache(cabc.Mapping):
     def predict_backgroundable(self, cmd):
         """Predics whether a command list is backgroundable."""
         name = self.cached_name(cmd[0])
-        if ON_WINDOWS: 
+        if ON_WINDOWS:
             # On all names (keys) are stored in upper case so instead
             # we get the original cmd or alias name 
             path, _ = self.lazyget(name, (None, None))