Index: tests/filterpyflakes.py
===================================================================
--- tests/filterpyflakes.py
+++ tests/filterpyflakes.py
@@ -16,6 +16,9 @@
         # for cffi, allow re-exports from pure.*
         r"cffi/[^:]*:.*\bimport \*' used",
         r"cffi/[^:]*:.*\*' imported but unused",
+        # This use of xrange is protected behind a conditional and
+        # is safe.
+        r"contrib/perf\.py:\d+: undefined name 'xrange'",
     ]
 
     keep = True