diff -r af83a0ed0afb -r 32bc3815efae tests/test-ui-config.py
--- a/tests/test-ui-config.py	Thu May 10 21:00:58 2018 +0900
+++ b/tests/test-ui-config.py	Thu May 10 21:08:32 2018 +0900
@@ -51,7 +51,7 @@
     ])
 
 def pprint(obj):
-    return stringutil.pprint(obj, bprefix=False).decode('ascii')
+    return stringutil.pprint(obj).decode('ascii')
 
 print(pprint(testui.configitems(b'values')))
 print(pprint(testui.configitems(b'lists')))