diff -r 84c6b9384d6a -r 85a2db47ad50 tests/test-ui-config.py
--- a/tests/test-ui-config.py	Tue Oct 17 21:15:31 2017 +0200
+++ b/tests/test-ui-config.py	Mon Oct 16 17:41:27 2017 +0200
@@ -6,6 +6,15 @@
 )
 
 testui = uimod.ui.load()
+
+# disable the configuration registration warning
+#
+# the purpose of this test is to check the old behavior, not to validate the
+# behavior from registered item. so we silent warning related to unregisted
+# config.
+testui.setconfig('devel', 'warn-config-unknown', False, 'test')
+testui.setconfig('devel', 'all-warnings', False, 'test')
+
 parsed = dispatch._parseconfig(testui, [
     'values.string=string value',
     'values.bool1=true',