Index: utils/lit/lit/formats/base.py
===================================================================
--- utils/lit/lit/formats/base.py
+++ utils/lit/lit/formats/base.py
@@ -81,7 +81,7 @@
                 yield test
 
     def createTempInput(self, tmp, test):
-        abstract
+        raise NotImplementedError('This is an abstract method.')
 
     def execute(self, test, litConfig):
         if test.config.unsupported: