--- a/debian/rules	Fri Aug 08 15:50:26 2014 -0700
+++ b/debian/rules	Fri Aug 08 23:14:00 2014 -0700
@@ -18,6 +18,7 @@
 	dh_python2
 
 clean: clean-docs
+	rm -f tests/*.err
 
 clean-docs:
 	rm -rf html