diff --git a/source/check_kinds/_interface.py b/source/check_kinds/_interface.py
index fedecfd..6dd0f79 100644
--- a/source/check_kinds/_interface.py
+++ b/source/check_kinds/_interface.py
@@ -6,7 +6,7 @@ class interface_check_kind(object):
 	
 	def normalize_conf_node(self, node):
 		raise NotImplementedError
-	
+		
 	
 	def run(self, parameters):
 		raise NotImplementedError